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