drivers/media/video/sh_mobile_ceu_camera.c

   1 /*
   2  * V4L2 Driver for SuperH Mobile CEU interface
   3  *
   4  * Copyright (C) 2008 Magnus Damm
   5  *
   6  * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
   7  *
   8  * Copyright (C) 2006, Sascha Hauer, Pengutronix
   9  * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  */
  16
  17 #include <linux/init.h>
  18 #include <linux/module.h>
  19 #include <linux/io.h>
  20 #include <linux/delay.h>
  21 #include <linux/dma-mapping.h>
  22 #include <linux/errno.h>
  23 #include <linux/fs.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/kernel.h>
  26 #include <linux/mm.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/time.h>
  29 #include <linux/version.h>
  30 #include <linux/device.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/mutex.h>
  33 #include <linux/videodev2.h>
  34
  35 #include <media/v4l2-common.h>
  36 #include <media/v4l2-dev.h>
  37 #include <media/soc_camera.h>
  38 #include <media/sh_mobile_ceu.h>
  39 #include <media/videobuf-dma-contig.h>
  40
  41 /* register offsets for sh7722 / sh7723 */
  42
  43 #define CAPSR  0x00
  44 #define CAPCR  0x04
  45 #define CAMCR  0x08
  46 #define CMCYR  0x0c
  47 #define CAMOR  0x10
  48 #define CAPWR  0x14
  49 #define CAIFR  0x18
  50 #define CSTCR  0x20 /* not on sh7723 */
  51 #define CSECR  0x24 /* not on sh7723 */
  52 #define CRCNTR 0x28
  53 #define CRCMPR 0x2c
  54 #define CFLCR  0x30
  55 #define CFSZR  0x34
  56 #define CDWDR  0x38
  57 #define CDAYR  0x3c
  58 #define CDACR  0x40
  59 #define CDBYR  0x44
  60 #define CDBCR  0x48
  61 #define CBDSR  0x4c
  62 #define CFWCR  0x5c
  63 #define CLFCR  0x60
  64 #define CDOCR  0x64
  65 #define CDDCR  0x68
  66 #define CDDAR  0x6c
  67 #define CEIER  0x70
  68 #define CETCR  0x74
  69 #define CSTSR  0x7c
  70 #define CSRTR  0x80
  71 #define CDSSR  0x84
  72 #define CDAYR2 0x90
  73 #define CDACR2 0x94
  74 #define CDBYR2 0x98
  75 #define CDBCR2 0x9c
  76
  77 static DEFINE_MUTEX(camera_lock);
  78
  79 /* per video frame buffer */
  80 struct sh_mobile_ceu_buffer {
  81         struct videobuf_buffer vb; /* v4l buffer must be first */
  82         const struct soc_camera_data_format *fmt;
  83 };
  84
  85 struct sh_mobile_ceu_dev {
  86         struct device *dev;
  87         struct soc_camera_host ici;
  88         struct soc_camera_device *icd;
  89
  90         unsigned int irq;
  91         void __iomem *base;
  92         unsigned long video_limit;
  93
  94         /* lock used to protect videobuf */
  95         spinlock_t lock;
  96         struct list_head capture;
  97         struct videobuf_buffer *active;
  98
  99         struct sh_mobile_ceu_info *pdata;
 100 };
 101
 102 static void ceu_write(struct sh_mobile_ceu_dev *priv,
 103                       unsigned long reg_offs, unsigned long data)
 104 {
 105         iowrite32(data, priv->base + reg_offs);
 106 }
 107
 108 static unsigned long ceu_read(struct sh_mobile_ceu_dev *priv,
 109                               unsigned long reg_offs)
 110 {
 111         return ioread32(priv->base + reg_offs);
 112 }
 113
 114 /*
 115  *  Videobuf operations
 116  */
 117 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
 118                                         unsigned int *count,
 119                                         unsigned int *size)
 120 {
 121         struct soc_camera_device *icd = vq->priv_data;
 122         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 123         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 124         int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
 125
 126         *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel);
 127
 128         if (0 == *count)
 129                 *count = 2;
 130
 131         if (pcdev->video_limit) {
 132                 while (*size * *count > pcdev->video_limit)
 133                         (*count)--;
 134         }
 135
 136         dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
 137
 138         return 0;
 139 }
 140
 141 static void free_buffer(struct videobuf_queue *vq,
 142                         struct sh_mobile_ceu_buffer *buf)
 143 {
 144         struct soc_camera_device *icd = vq->priv_data;
 145
 146         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 147                 &buf->vb, buf->vb.baddr, buf->vb.bsize);
 148
 149         if (in_interrupt())
 150                 BUG();
 151
 152         videobuf_dma_contig_free(vq, &buf->vb);
 153         dev_dbg(&icd->dev, "%s freed\n", __func__);
 154         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 155 }
 156
 157 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
 158 {
 159         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~1);
 160         ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & 0x0317f313);
 161         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | 1);
 162
 163         ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~0x10000);
 164
 165         ceu_write(pcdev, CETCR, 0x0317f313 ^ 0x10);
 166
 167         if (pcdev->active) {
 168                 ceu_write(pcdev, CDAYR, videobuf_to_dma_contig(pcdev->active));
 169                 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
 170         }
 171 }
 172
 173 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
 174                                           struct videobuf_buffer *vb,
 175                                           enum v4l2_field field)
 176 {
 177         struct soc_camera_device *icd = vq->priv_data;
 178         struct sh_mobile_ceu_buffer *buf;
 179         int ret;
 180
 181         buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
 182
 183         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 184                 vb, vb->baddr, vb->bsize);
 185
 186         /* Added list head initialization on alloc */
 187         WARN_ON(!list_empty(&vb->queue));
 188
 189 #ifdef DEBUG
 190         /* This can be useful if you want to see if we actually fill
 191          * the buffer with something */
 192         memset((void *)vb->baddr, 0xaa, vb->bsize);
 193 #endif
 194
 195         BUG_ON(NULL == icd->current_fmt);
 196
 197         if (buf->fmt    != icd->current_fmt ||
 198             vb->width   != icd->width ||
 199             vb->height  != icd->height ||
 200             vb->field   != field) {
 201                 buf->fmt        = icd->current_fmt;
 202                 vb->width       = icd->width;
 203                 vb->height      = icd->height;
 204                 vb->field       = field;
 205                 vb->state       = VIDEOBUF_NEEDS_INIT;
 206         }
 207
 208         vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
 209         if (0 != vb->baddr && vb->bsize < vb->size) {
 210                 ret = -EINVAL;
 211                 goto out;
 212         }
 213
 214         if (vb->state == VIDEOBUF_NEEDS_INIT) {
 215                 ret = videobuf_iolock(vq, vb, NULL);
 216                 if (ret)
 217                         goto fail;
 218                 vb->state = VIDEOBUF_PREPARED;
 219         }
 220
 221         return 0;
 222 fail:
 223         free_buffer(vq, buf);
 224 out:
 225         return ret;
 226 }
 227
 228 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
 229                                          struct videobuf_buffer *vb)
 230 {
 231         struct soc_camera_device *icd = vq->priv_data;
 232         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 233         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 234         unsigned long flags;
 235
 236         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 237                 vb, vb->baddr, vb->bsize);
 238
 239         vb->state = VIDEOBUF_ACTIVE;
 240         spin_lock_irqsave(&pcdev->lock, flags);
 241         list_add_tail(&vb->queue, &pcdev->capture);
 242
 243         if (!pcdev->active) {
 244                 pcdev->active = vb;
 245                 sh_mobile_ceu_capture(pcdev);
 246         }
 247
 248         spin_unlock_irqrestore(&pcdev->lock, flags);
 249 }
 250
 251 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
 252                                            struct videobuf_buffer *vb)
 253 {
 254         free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
 255 }
 256
 257 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
 258         .buf_setup      = sh_mobile_ceu_videobuf_setup,
 259         .buf_prepare    = sh_mobile_ceu_videobuf_prepare,
 260         .buf_queue      = sh_mobile_ceu_videobuf_queue,
 261         .buf_release    = sh_mobile_ceu_videobuf_release,
 262 };
 263
 264 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
 265 {
 266         struct sh_mobile_ceu_dev *pcdev = data;
 267         struct videobuf_buffer *vb;
 268         unsigned long flags;
 269
 270         spin_lock_irqsave(&pcdev->lock, flags);
 271
 272         vb = pcdev->active;
 273         list_del_init(&vb->queue);
 274
 275         if (!list_empty(&pcdev->capture))
 276                 pcdev->active = list_entry(pcdev->capture.next,
 277                                            struct videobuf_buffer, queue);
 278         else
 279                 pcdev->active = NULL;
 280
 281         sh_mobile_ceu_capture(pcdev);
 282
 283         vb->state = VIDEOBUF_DONE;
 284         do_gettimeofday(&vb->ts);
 285         vb->field_count++;
 286         wake_up(&vb->done);
 287         spin_unlock_irqrestore(&pcdev->lock, flags);
 288
 289         return IRQ_HANDLED;
 290 }
 291
 292 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
 293 {
 294         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 295         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 296         int ret = -EBUSY;
 297
 298         mutex_lock(&camera_lock);
 299
 300         if (pcdev->icd)
 301                 goto err;
 302
 303         dev_info(&icd->dev,
 304                  "SuperH Mobile CEU driver attached to camera %d\n",
 305                  icd->devnum);
 306
 307         if (pcdev->pdata->enable_camera)
 308                 pcdev->pdata->enable_camera();
 309
 310         ret = icd->ops->init(icd);
 311         if (ret)
 312                 goto err;
 313
 314         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
 315         while (ceu_read(pcdev, CSTSR) & 1)
 316                 msleep(1);
 317
 318         pcdev->icd = icd;
 319 err:
 320         mutex_unlock(&camera_lock);
 321
 322         return ret;
 323 }
 324
 325 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
 326 {
 327         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 328         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 329
 330         BUG_ON(icd != pcdev->icd);
 331
 332         /* disable capture, disable interrupts */
 333         ceu_write(pcdev, CEIER, 0);
 334         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
 335         icd->ops->release(icd);
 336         if (pcdev->pdata->disable_camera)
 337                 pcdev->pdata->disable_camera();
 338
 339         dev_info(&icd->dev,
 340                  "SuperH Mobile CEU driver detached from camera %d\n",
 341                  icd->devnum);
 342
 343         pcdev->icd = NULL;
 344 }
 345
 346 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
 347                                        __u32 pixfmt)
 348 {
 349         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 350         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 351         int ret, buswidth, width, cfszr_width, cdwdr_width;
 352         unsigned long camera_flags, common_flags, value;
 353
 354         camera_flags = icd->ops->query_bus_param(icd);
 355         common_flags = soc_camera_bus_param_compatible(camera_flags,
 356                                                        pcdev->pdata->flags);
 357         if (!common_flags)
 358                 return -EINVAL;
 359
 360         ret = icd->ops->set_bus_param(icd, common_flags);
 361         if (ret < 0)
 362                 return ret;
 363
 364         switch (common_flags & SOCAM_DATAWIDTH_MASK) {
 365         case SOCAM_DATAWIDTH_8:
 366                 buswidth = 8;
 367                 break;
 368         case SOCAM_DATAWIDTH_16:
 369                 buswidth = 16;
 370                 break;
 371         default:
 372                 return -EINVAL;
 373         }
 374
 375         ceu_write(pcdev, CRCNTR, 0);
 376         ceu_write(pcdev, CRCMPR, 0);
 377
 378         value = 0x00000010;
 379         value |= (common_flags & SOCAM_VSYNC_ACTIVE_LOW) ? (1 << 1) : 0;
 380         value |= (common_flags & SOCAM_HSYNC_ACTIVE_LOW) ? (1 << 0) : 0;
 381         value |= (buswidth == 16) ? (1 << 12) : 0;
 382         ceu_write(pcdev, CAMCR, value);
 383
 384         ceu_write(pcdev, CAPCR, 0x00300000);
 385         ceu_write(pcdev, CAIFR, 0);
 386
 387         mdelay(1);
 388
 389         width = icd->width * (icd->current_fmt->depth / 8);
 390         width = (buswidth == 16) ? width / 2 : width;
 391         cfszr_width = (buswidth == 8) ? width / 2 : width;
 392         cdwdr_width = (buswidth == 16) ? width * 2 : width;
 393
 394         ceu_write(pcdev, CAMOR, 0);
 395         ceu_write(pcdev, CAPWR, (icd->height << 16) | width);
 396         ceu_write(pcdev, CFLCR, 0); /* data fetch mode - no scaling */
 397         ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width);
 398         ceu_write(pcdev, CLFCR, 0); /* data fetch mode - no lowpass filter */
 399         ceu_write(pcdev, CDOCR, 0x00000016);
 400
 401         ceu_write(pcdev, CDWDR, cdwdr_width);
 402         ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
 403
 404         /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
 405         /* in data fetch mode: no need for CDACR, CDBYR, CDBCR */
 406
 407         return 0;
 408 }
 409
 410 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
 411                                        __u32 pixfmt)
 412 {
 413         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 414         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 415         unsigned long camera_flags, common_flags;
 416
 417         camera_flags = icd->ops->query_bus_param(icd);
 418         common_flags = soc_camera_bus_param_compatible(camera_flags,
 419                                                        pcdev->pdata->flags);
 420         if (!common_flags)
 421                 return -EINVAL;
 422
 423         return 0;
 424 }
 425
 426 static int sh_mobile_ceu_set_fmt_cap(struct soc_camera_device *icd,
 427                                      __u32 pixfmt, struct v4l2_rect *rect)
 428 {
 429         return icd->ops->set_fmt_cap(icd, pixfmt, rect);
 430 }
 431
 432 static int sh_mobile_ceu_try_fmt_cap(struct soc_camera_device *icd,
 433                                      struct v4l2_format *f)
 434 {
 435         /* FIXME: calculate using depth and bus width */
 436
 437         if (f->fmt.pix.height < 4)
 438                 f->fmt.pix.height = 4;
 439         if (f->fmt.pix.height > 1920)
 440                 f->fmt.pix.height = 1920;
 441         if (f->fmt.pix.width < 2)
 442                 f->fmt.pix.width = 2;
 443         if (f->fmt.pix.width > 2560)
 444                 f->fmt.pix.width = 2560;
 445         f->fmt.pix.width &= ~0x01;
 446         f->fmt.pix.height &= ~0x03;
 447
 448         /* limit to sensor capabilities */
 449         return icd->ops->try_fmt_cap(icd, f);
 450 }
 451
 452 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
 453                                  struct v4l2_requestbuffers *p)
 454 {
 455         int i;
 456
 457         /* This is for locking debugging only. I removed spinlocks and now I
 458          * check whether .prepare is ever called on a linked buffer, or whether
 459          * a dma IRQ can occur for an in-work or unlinked buffer. Until now
 460          * it hadn't triggered */
 461         for (i = 0; i < p->count; i++) {
 462                 struct sh_mobile_ceu_buffer *buf;
 463
 464                 buf = container_of(icf->vb_vidq.bufs[i],
 465                                    struct sh_mobile_ceu_buffer, vb);
 466                 INIT_LIST_HEAD(&buf->vb.queue);
 467         }
 468
 469         return 0;
 470 }
 471
 472 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
 473 {
 474         struct soc_camera_file *icf = file->private_data;
 475         struct sh_mobile_ceu_buffer *buf;
 476
 477         buf = list_entry(icf->vb_vidq.stream.next,
 478                          struct sh_mobile_ceu_buffer, vb.stream);
 479
 480         poll_wait(file, &buf->vb.done, pt);
 481
 482         if (buf->vb.state == VIDEOBUF_DONE ||
 483             buf->vb.state == VIDEOBUF_ERROR)
 484                 return POLLIN|POLLRDNORM;
 485
 486         return 0;
 487 }
 488
 489 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
 490                                   struct v4l2_capability *cap)
 491 {
 492         strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
 493         cap->version = KERNEL_VERSION(0, 0, 5);
 494         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 495         return 0;
 496 }
 497
 498 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
 499                                         struct soc_camera_device *icd)
 500 {
 501         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 502         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 503
 504         videobuf_queue_dma_contig_init(q,
 505                                        &sh_mobile_ceu_videobuf_ops,
 506                                        &ici->dev, &pcdev->lock,
 507                                        V4L2_BUF_TYPE_VIDEO_CAPTURE,
 508                                        V4L2_FIELD_NONE,
 509                                        sizeof(struct sh_mobile_ceu_buffer),
 510                                        icd);
 511 }
 512
 513 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
 514         .owner          = THIS_MODULE,
 515         .add            = sh_mobile_ceu_add_device,
 516         .remove         = sh_mobile_ceu_remove_device,
 517         .set_fmt_cap    = sh_mobile_ceu_set_fmt_cap,
 518         .try_fmt_cap    = sh_mobile_ceu_try_fmt_cap,
 519         .reqbufs        = sh_mobile_ceu_reqbufs,
 520         .poll           = sh_mobile_ceu_poll,
 521         .querycap       = sh_mobile_ceu_querycap,
 522         .try_bus_param  = sh_mobile_ceu_try_bus_param,
 523         .set_bus_param  = sh_mobile_ceu_set_bus_param,
 524         .init_videobuf  = sh_mobile_ceu_init_videobuf,
 525 };
 526
 527 static int sh_mobile_ceu_probe(struct platform_device *pdev)
 528 {
 529         struct sh_mobile_ceu_dev *pcdev;
 530         struct resource *res;
 531         void __iomem *base;
 532         unsigned int irq;
 533         int err = 0;
 534
 535         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 536         irq = platform_get_irq(pdev, 0);
 537         if (!res || !irq) {
 538                 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
 539                 err = -ENODEV;
 540                 goto exit;
 541         }
 542
 543         pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
 544         if (!pcdev) {
 545                 dev_err(&pdev->dev, "Could not allocate pcdev\n");
 546                 err = -ENOMEM;
 547                 goto exit;
 548         }
 549
 550         platform_set_drvdata(pdev, pcdev);
 551         INIT_LIST_HEAD(&pcdev->capture);
 552         spin_lock_init(&pcdev->lock);
 553
 554         pcdev->pdata = pdev->dev.platform_data;
 555         if (!pcdev->pdata) {
 556                 err = -EINVAL;
 557                 dev_err(&pdev->dev, "CEU platform data not set.\n");
 558                 goto exit_kfree;
 559         }
 560
 561         base = ioremap_nocache(res->start, res->end - res->start + 1);
 562         if (!base) {
 563                 err = -ENXIO;
 564                 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
 565                 goto exit_kfree;
 566         }
 567
 568         pcdev->irq = irq;
 569         pcdev->base = base;
 570         pcdev->video_limit = 0; /* only enabled if second resource exists */
 571         pcdev->dev = &pdev->dev;
 572
 573         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 574         if (res) {
 575                 err = dma_declare_coherent_memory(&pdev->dev, res->start,
 576                                                   res->start,
 577                                                   (res->end - res->start) + 1,
 578                                                   DMA_MEMORY_MAP |
 579                                                   DMA_MEMORY_EXCLUSIVE);
 580                 if (!err) {
 581                         dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
 582                         err = -ENXIO;
 583                         goto exit_iounmap;
 584                 }
 585
 586                 pcdev->video_limit = (res->end - res->start) + 1;
 587         }
 588
 589         /* request irq */
 590         err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
 591                           pdev->dev.bus_id, pcdev);
 592         if (err) {
 593                 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
 594                 goto exit_release_mem;
 595         }
 596
 597         pcdev->ici.priv = pcdev;
 598         pcdev->ici.dev.parent = &pdev->dev;
 599         pcdev->ici.nr = pdev->id;
 600         pcdev->ici.drv_name = pdev->dev.bus_id,
 601         pcdev->ici.ops = &sh_mobile_ceu_host_ops,
 602
 603         err = soc_camera_host_register(&pcdev->ici);
 604         if (err)
 605                 goto exit_free_irq;
 606
 607         return 0;
 608
 609 exit_free_irq:
 610         free_irq(pcdev->irq, pcdev);
 611 exit_release_mem:
 612         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
 613                 dma_release_declared_memory(&pdev->dev);
 614 exit_iounmap:
 615         iounmap(base);
 616 exit_kfree:
 617         kfree(pcdev);
 618 exit:
 619         return err;
 620 }
 621
 622 static int sh_mobile_ceu_remove(struct platform_device *pdev)
 623 {
 624         struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev);
 625
 626         soc_camera_host_unregister(&pcdev->ici);
 627         free_irq(pcdev->irq, pcdev);
 628         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
 629                 dma_release_declared_memory(&pdev->dev);
 630         iounmap(pcdev->base);
 631         kfree(pcdev);
 632         return 0;
 633 }
 634
 635 static struct platform_driver sh_mobile_ceu_driver = {
 636         .driver         = {
 637                 .name   = "sh_mobile_ceu",
 638         },
 639         .probe          = sh_mobile_ceu_probe,
 640         .remove         = sh_mobile_ceu_remove,
 641 };
 642
 643 static int __init sh_mobile_ceu_init(void)
 644 {
 645         return platform_driver_register(&sh_mobile_ceu_driver);
 646 }
 647
 648 static void __exit sh_mobile_ceu_exit(void)
 649 {
 650         platform_driver_unregister(&sh_mobile_ceu_driver);
 651 }
 652
 653 module_init(sh_mobile_ceu_init);
 654 module_exit(sh_mobile_ceu_exit);
 655
 656 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
 657 MODULE_AUTHOR("Magnus Damm");
 658 MODULE_LICENSE("GPL");