SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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/videodev2.h>
  33 #include <linux/pm_runtime.h>
  34 #include <linux/sched.h>
  35
  36 #include <media/v4l2-common.h>
  37 #include <media/v4l2-dev.h>
  38 #include <media/soc_camera.h>
  39 #include <media/sh_mobile_ceu.h>
  40 #include <media/videobuf-dma-contig.h>
  41
  42 /* register offsets for sh7722 / sh7723 */
  43
  44 #define CAPSR  0x00 /* Capture start register */
  45 #define CAPCR  0x04 /* Capture control register */
  46 #define CAMCR  0x08 /* Capture interface control register */
  47 #define CMCYR  0x0c /* Capture interface cycle  register */
  48 #define CAMOR  0x10 /* Capture interface offset register */
  49 #define CAPWR  0x14 /* Capture interface width register */
  50 #define CAIFR  0x18 /* Capture interface input format register */
  51 #define CSTCR  0x20 /* Camera strobe control register (<= sh7722) */
  52 #define CSECR  0x24 /* Camera strobe emission count register (<= sh7722) */
  53 #define CRCNTR 0x28 /* CEU register control register */
  54 #define CRCMPR 0x2c /* CEU register forcible control register */
  55 #define CFLCR  0x30 /* Capture filter control register */
  56 #define CFSZR  0x34 /* Capture filter size clip register */
  57 #define CDWDR  0x38 /* Capture destination width register */
  58 #define CDAYR  0x3c /* Capture data address Y register */
  59 #define CDACR  0x40 /* Capture data address C register */
  60 #define CDBYR  0x44 /* Capture data bottom-field address Y register */
  61 #define CDBCR  0x48 /* Capture data bottom-field address C register */
  62 #define CBDSR  0x4c /* Capture bundle destination size register */
  63 #define CFWCR  0x5c /* Firewall operation control register */
  64 #define CLFCR  0x60 /* Capture low-pass filter control register */
  65 #define CDOCR  0x64 /* Capture data output control register */
  66 #define CDDCR  0x68 /* Capture data complexity level register */
  67 #define CDDAR  0x6c /* Capture data complexity level address register */
  68 #define CEIER  0x70 /* Capture event interrupt enable register */
  69 #define CETCR  0x74 /* Capture event flag clear register */
  70 #define CSTSR  0x7c /* Capture status register */
  71 #define CSRTR  0x80 /* Capture software reset register */
  72 #define CDSSR  0x84 /* Capture data size register */
  73 #define CDAYR2 0x90 /* Capture data address Y register 2 */
  74 #define CDACR2 0x94 /* Capture data address C register 2 */
  75 #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
  76 #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
  77
  78 #undef DEBUG_GEOMETRY
  79 #ifdef DEBUG_GEOMETRY
  80 #define dev_geo dev_info
  81 #else
  82 #define dev_geo dev_dbg
  83 #endif
  84
  85 /* per video frame buffer */
  86 struct sh_mobile_ceu_buffer {
  87         struct videobuf_buffer vb; /* v4l buffer must be first */
  88         const struct soc_camera_data_format *fmt;
  89 };
  90
  91 struct sh_mobile_ceu_dev {
  92         struct soc_camera_host ici;
  93         struct soc_camera_device *icd;
  94
  95         unsigned int irq;
  96         void __iomem *base;
  97         unsigned long video_limit;
  98
  99         /* lock used to protect videobuf */
 100         spinlock_t lock;
 101         struct list_head capture;
 102         struct videobuf_buffer *active;
 103
 104         struct sh_mobile_ceu_info *pdata;
 105
 106         u32 cflcr;
 107
 108         unsigned int is_interlaced:1;
 109         unsigned int image_mode:1;
 110         unsigned int is_16bit:1;
 111 };
 112
 113 struct sh_mobile_ceu_cam {
 114         struct v4l2_rect ceu_rect;
 115         unsigned int cam_width;
 116         unsigned int cam_height;
 117         const struct soc_camera_data_format *extra_fmt;
 118         const struct soc_camera_data_format *camera_fmt;
 119 };
 120
 121 static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
 122 {
 123         unsigned long flags;
 124
 125         flags = SOCAM_MASTER |
 126                 SOCAM_PCLK_SAMPLE_RISING |
 127                 SOCAM_HSYNC_ACTIVE_HIGH |
 128                 SOCAM_HSYNC_ACTIVE_LOW |
 129                 SOCAM_VSYNC_ACTIVE_HIGH |
 130                 SOCAM_VSYNC_ACTIVE_LOW |
 131                 SOCAM_DATA_ACTIVE_HIGH;
 132
 133         if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
 134                 flags |= SOCAM_DATAWIDTH_8;
 135
 136         if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
 137                 flags |= SOCAM_DATAWIDTH_16;
 138
 139         if (flags & SOCAM_DATAWIDTH_MASK)
 140                 return flags;
 141
 142         return 0;
 143 }
 144
 145 static void ceu_write(struct sh_mobile_ceu_dev *priv,
 146                       unsigned long reg_offs, u32 data)
 147 {
 148         iowrite32(data, priv->base + reg_offs);
 149 }
 150
 151 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
 152 {
 153         return ioread32(priv->base + reg_offs);
 154 }
 155
 156 static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
 157 {
 158         int i, success = 0;
 159         struct soc_camera_device *icd = pcdev->icd;
 160
 161         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
 162
 163         /* wait CSTSR.CPTON bit */
 164         for (i = 0; i < 1000; i++) {
 165                 if (!(ceu_read(pcdev, CSTSR) & 1)) {
 166                         success++;
 167                         break;
 168                 }
 169                 udelay(1);
 170         }
 171
 172         /* wait CAPSR.CPKIL bit */
 173         for (i = 0; i < 1000; i++) {
 174                 if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
 175                         success++;
 176                         break;
 177                 }
 178                 udelay(1);
 179         }
 180
 181
 182         if (2 != success) {
 183                 dev_warn(&icd->dev, "soft reset time out\n");
 184                 return -EIO;
 185         }
 186
 187         return 0;
 188 }
 189
 190 /*
 191  *  Videobuf operations
 192  */
 193 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
 194                                         unsigned int *count,
 195                                         unsigned int *size)
 196 {
 197         struct soc_camera_device *icd = vq->priv_data;
 198         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 199         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 200         int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
 201
 202         *size = PAGE_ALIGN(icd->user_width * icd->user_height *
 203                            bytes_per_pixel);
 204
 205         if (0 == *count)
 206                 *count = 2;
 207
 208         if (pcdev->video_limit) {
 209                 while (*size * *count > pcdev->video_limit)
 210                         (*count)--;
 211         }
 212
 213         dev_dbg(icd->dev.parent, "count=%d, size=%d\n", *count, *size);
 214
 215         return 0;
 216 }
 217
 218 static void free_buffer(struct videobuf_queue *vq,
 219                         struct sh_mobile_ceu_buffer *buf)
 220 {
 221         struct soc_camera_device *icd = vq->priv_data;
 222         struct device *dev = icd->dev.parent;
 223
 224         dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 225                 &buf->vb, buf->vb.baddr, buf->vb.bsize);
 226
 227         if (in_interrupt())
 228                 BUG();
 229
 230         videobuf_waiton(&buf->vb, 0, 0);
 231         videobuf_dma_contig_free(vq, &buf->vb);
 232         dev_dbg(dev, "%s freed\n", __func__);
 233         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 234 }
 235
 236 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
 237 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
 238 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
 239 #define CEU_CEIER_VBP   (1 << 20) /* vbp error */
 240 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
 241 #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
 242
 243
 244 /*
 245  * return value doesn't reflex the success/failure to queue the new buffer,
 246  * but rather the status of the previous buffer.
 247  */
 248 static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
 249 {
 250         struct soc_camera_device *icd = pcdev->icd;
 251         dma_addr_t phys_addr_top, phys_addr_bottom;
 252         u32 status;
 253         int ret = 0;
 254
 255         /*
 256          * The hardware is _very_ picky about this sequence. Especially
 257          * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
 258          * several not-so-well documented interrupt sources in CETCR.
 259          */
 260         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
 261         status = ceu_read(pcdev, CETCR);
 262         ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
 263         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
 264         ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
 265         ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
 266
 267         /*
 268          * When a VBP interrupt occurs, a capture end interrupt does not occur
 269          * and the image of that frame is not captured correctly. So, soft reset
 270          * is needed here.
 271          */
 272         if (status & CEU_CEIER_VBP) {
 273                 sh_mobile_ceu_soft_reset(pcdev);
 274                 ret = -EIO;
 275         }
 276
 277         if (!pcdev->active)
 278                 return ret;
 279
 280         phys_addr_top = videobuf_to_dma_contig(pcdev->active);
 281         ceu_write(pcdev, CDAYR, phys_addr_top);
 282         if (pcdev->is_interlaced) {
 283                 phys_addr_bottom = phys_addr_top + icd->user_width;
 284                 ceu_write(pcdev, CDBYR, phys_addr_bottom);
 285         }
 286
 287         switch (icd->current_fmt->fourcc) {
 288         case V4L2_PIX_FMT_NV12:
 289         case V4L2_PIX_FMT_NV21:
 290         case V4L2_PIX_FMT_NV16:
 291         case V4L2_PIX_FMT_NV61:
 292                 phys_addr_top += icd->user_width *
 293                         icd->user_height;
 294                 ceu_write(pcdev, CDACR, phys_addr_top);
 295                 if (pcdev->is_interlaced) {
 296                         phys_addr_bottom = phys_addr_top +
 297                                 icd->user_width;
 298                         ceu_write(pcdev, CDBCR, phys_addr_bottom);
 299                 }
 300         }
 301
 302         pcdev->active->state = VIDEOBUF_ACTIVE;
 303         ceu_write(pcdev, CAPSR, 0x1); /* start capture */
 304
 305         return ret;
 306 }
 307
 308 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
 309                                           struct videobuf_buffer *vb,
 310                                           enum v4l2_field field)
 311 {
 312         struct soc_camera_device *icd = vq->priv_data;
 313         struct sh_mobile_ceu_buffer *buf;
 314         int ret;
 315
 316         buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
 317
 318         dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 319                 vb, vb->baddr, vb->bsize);
 320
 321         /* Added list head initialization on alloc */
 322         WARN_ON(!list_empty(&vb->queue));
 323
 324 #ifdef DEBUG
 325         /*
 326          * This can be useful if you want to see if we actually fill
 327          * the buffer with something
 328          */
 329         memset((void *)vb->baddr, 0xaa, vb->bsize);
 330 #endif
 331
 332         BUG_ON(NULL == icd->current_fmt);
 333
 334         if (buf->fmt    != icd->current_fmt ||
 335             vb->width   != icd->user_width ||
 336             vb->height  != icd->user_height ||
 337             vb->field   != field) {
 338                 buf->fmt        = icd->current_fmt;
 339                 vb->width       = icd->user_width;
 340                 vb->height      = icd->user_height;
 341                 vb->field       = field;
 342                 vb->state       = VIDEOBUF_NEEDS_INIT;
 343         }
 344
 345         vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
 346         if (0 != vb->baddr && vb->bsize < vb->size) {
 347                 ret = -EINVAL;
 348                 goto out;
 349         }
 350
 351         if (vb->state == VIDEOBUF_NEEDS_INIT) {
 352                 ret = videobuf_iolock(vq, vb, NULL);
 353                 if (ret)
 354                         goto fail;
 355                 vb->state = VIDEOBUF_PREPARED;
 356         }
 357
 358         return 0;
 359 fail:
 360         free_buffer(vq, buf);
 361 out:
 362         return ret;
 363 }
 364
 365 /* Called under spinlock_irqsave(&pcdev->lock, ...) */
 366 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
 367                                          struct videobuf_buffer *vb)
 368 {
 369         struct soc_camera_device *icd = vq->priv_data;
 370         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 371         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 372
 373         dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 374                 vb, vb->baddr, vb->bsize);
 375
 376         vb->state = VIDEOBUF_QUEUED;
 377         list_add_tail(&vb->queue, &pcdev->capture);
 378
 379         if (!pcdev->active) {
 380                 /*
 381                  * Because there were no active buffer at this moment,
 382                  * we are not interested in the return value of
 383                  * sh_mobile_ceu_capture here.
 384                  */
 385                 pcdev->active = vb;
 386                 sh_mobile_ceu_capture(pcdev);
 387         }
 388 }
 389
 390 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
 391                                            struct videobuf_buffer *vb)
 392 {
 393         struct soc_camera_device *icd = vq->priv_data;
 394         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 395         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 396         unsigned long flags;
 397
 398         spin_lock_irqsave(&pcdev->lock, flags);
 399
 400         if (pcdev->active == vb) {
 401                 /* disable capture (release DMA buffer), reset */
 402                 ceu_write(pcdev, CAPSR, 1 << 16);
 403                 pcdev->active = NULL;
 404         }
 405
 406         if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) &&
 407             !list_empty(&vb->queue)) {
 408                 vb->state = VIDEOBUF_ERROR;
 409                 list_del_init(&vb->queue);
 410         }
 411
 412         spin_unlock_irqrestore(&pcdev->lock, flags);
 413
 414         free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
 415 }
 416
 417 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
 418         .buf_setup      = sh_mobile_ceu_videobuf_setup,
 419         .buf_prepare    = sh_mobile_ceu_videobuf_prepare,
 420         .buf_queue      = sh_mobile_ceu_videobuf_queue,
 421         .buf_release    = sh_mobile_ceu_videobuf_release,
 422 };
 423
 424 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
 425 {
 426         struct sh_mobile_ceu_dev *pcdev = data;
 427         struct videobuf_buffer *vb;
 428         unsigned long flags;
 429
 430         spin_lock_irqsave(&pcdev->lock, flags);
 431
 432         vb = pcdev->active;
 433         if (!vb)
 434                 /* Stale interrupt from a released buffer */
 435                 goto out;
 436
 437         list_del_init(&vb->queue);
 438
 439         if (!list_empty(&pcdev->capture))
 440                 pcdev->active = list_entry(pcdev->capture.next,
 441                                            struct videobuf_buffer, queue);
 442         else
 443                 pcdev->active = NULL;
 444
 445         vb->state = (sh_mobile_ceu_capture(pcdev) < 0) ?
 446                 VIDEOBUF_ERROR : VIDEOBUF_DONE;
 447         do_gettimeofday(&vb->ts);
 448         vb->field_count++;
 449         wake_up(&vb->done);
 450
 451 out:
 452         spin_unlock_irqrestore(&pcdev->lock, flags);
 453
 454         return IRQ_HANDLED;
 455 }
 456
 457 /* Called with .video_lock held */
 458 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
 459 {
 460         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 461         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 462         int ret;
 463
 464         if (pcdev->icd)
 465                 return -EBUSY;
 466
 467         dev_info(icd->dev.parent,
 468                  "SuperH Mobile CEU driver attached to camera %d\n",
 469                  icd->devnum);
 470
 471         pm_runtime_get_sync(ici->v4l2_dev.dev);
 472
 473         ret = sh_mobile_ceu_soft_reset(pcdev);
 474         if (!ret)
 475                 pcdev->icd = icd;
 476
 477         return ret;
 478 }
 479
 480 /* Called with .video_lock held */
 481 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
 482 {
 483         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 484         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 485         unsigned long flags;
 486
 487         BUG_ON(icd != pcdev->icd);
 488
 489         /* disable capture, disable interrupts */
 490         ceu_write(pcdev, CEIER, 0);
 491         sh_mobile_ceu_soft_reset(pcdev);
 492
 493         /* make sure active buffer is canceled */
 494         spin_lock_irqsave(&pcdev->lock, flags);
 495         if (pcdev->active) {
 496                 list_del(&pcdev->active->queue);
 497                 pcdev->active->state = VIDEOBUF_ERROR;
 498                 wake_up_all(&pcdev->active->done);
 499                 pcdev->active = NULL;
 500         }
 501         spin_unlock_irqrestore(&pcdev->lock, flags);
 502
 503         pm_runtime_put_sync(ici->v4l2_dev.dev);
 504
 505         dev_info(icd->dev.parent,
 506                  "SuperH Mobile CEU driver detached from camera %d\n",
 507                  icd->devnum);
 508
 509         pcdev->icd = NULL;
 510 }
 511
 512 /*
 513  * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
 514  * in SH7722 Hardware Manual
 515  */
 516 static unsigned int size_dst(unsigned int src, unsigned int scale)
 517 {
 518         unsigned int mant_pre = scale >> 12;
 519         if (!src || !scale)
 520                 return src;
 521         return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
 522                 mant_pre * 4096 / scale + 1;
 523 }
 524
 525 static u16 calc_scale(unsigned int src, unsigned int *dst)
 526 {
 527         u16 scale;
 528
 529         if (src == *dst)
 530                 return 0;
 531
 532         scale = (src * 4096 / *dst) & ~7;
 533
 534         while (scale > 4096 && size_dst(src, scale) < *dst)
 535                 scale -= 8;
 536
 537         *dst = size_dst(src, scale);
 538
 539         return scale;
 540 }
 541
 542 /* rect is guaranteed to not exceed the scaled camera rectangle */
 543 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd,
 544                                    unsigned int out_width,
 545                                    unsigned int out_height)
 546 {
 547         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 548         struct sh_mobile_ceu_cam *cam = icd->host_priv;
 549         struct v4l2_rect *rect = &cam->ceu_rect;
 550         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 551         unsigned int height, width, cdwdr_width, in_width, in_height;
 552         unsigned int left_offset, top_offset;
 553         u32 camor;
 554
 555         dev_dbg(icd->dev.parent, "Crop %ux%u@%u:%u\n",
 556                 rect->width, rect->height, rect->left, rect->top);
 557
 558         left_offset     = rect->left;
 559         top_offset      = rect->top;
 560
 561         if (pcdev->image_mode) {
 562                 in_width = rect->width;
 563                 if (!pcdev->is_16bit) {
 564                         in_width *= 2;
 565                         left_offset *= 2;
 566                 }
 567                 width = cdwdr_width = out_width;
 568         } else {
 569                 unsigned int w_factor = (icd->current_fmt->depth + 7) >> 3;
 570
 571                 width = out_width * w_factor / 2;
 572
 573                 if (!pcdev->is_16bit)
 574                         w_factor *= 2;
 575
 576                 in_width = rect->width * w_factor / 2;
 577                 left_offset = left_offset * w_factor / 2;
 578
 579                 cdwdr_width = width * 2;
 580         }
 581
 582         height = out_height;
 583         in_height = rect->height;
 584         if (pcdev->is_interlaced) {
 585                 height /= 2;
 586                 in_height /= 2;
 587                 top_offset /= 2;
 588                 cdwdr_width *= 2;
 589         }
 590
 591         /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
 592         camor = left_offset | (top_offset << 16);
 593
 594         dev_geo(icd->dev.parent,
 595                 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
 596                 (in_height << 16) | in_width, (height << 16) | width,
 597                 cdwdr_width);
 598
 599         ceu_write(pcdev, CAMOR, camor);
 600         ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
 601         ceu_write(pcdev, CFSZR, (height << 16) | width);
 602         ceu_write(pcdev, CDWDR, cdwdr_width);
 603 }
 604
 605 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
 606 {
 607         u32 capsr = ceu_read(pcdev, CAPSR);
 608         ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
 609         return capsr;
 610 }
 611
 612 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
 613 {
 614         unsigned long timeout = jiffies + 10 * HZ;
 615
 616         /*
 617          * Wait until the end of the current frame. It can take a long time,
 618          * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
 619          */
 620         while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
 621                 msleep(1);
 622
 623         if (time_after(jiffies, timeout)) {
 624                 dev_err(pcdev->ici.v4l2_dev.dev,
 625                         "Timeout waiting for frame end! Interface problem?\n");
 626                 return;
 627         }
 628
 629         /* Wait until reset clears, this shall not hang... */
 630         while (ceu_read(pcdev, CAPSR) & (1 << 16))
 631                 udelay(10);
 632
 633         /* Anything to restore? */
 634         if (capsr & ~(1 << 16))
 635                 ceu_write(pcdev, CAPSR, capsr);
 636 }
 637
 638 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
 639                                        __u32 pixfmt)
 640 {
 641         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 642         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 643         int ret;
 644         unsigned long camera_flags, common_flags, value;
 645         int yuv_lineskip;
 646         struct sh_mobile_ceu_cam *cam = icd->host_priv;
 647         u32 capsr = capture_save_reset(pcdev);
 648
 649         camera_flags = icd->ops->query_bus_param(icd);
 650         common_flags = soc_camera_bus_param_compatible(camera_flags,
 651                                                        make_bus_param(pcdev));
 652         if (!common_flags)
 653                 return -EINVAL;
 654
 655         ret = icd->ops->set_bus_param(icd, common_flags);
 656         if (ret < 0)
 657                 return ret;
 658
 659         switch (common_flags & SOCAM_DATAWIDTH_MASK) {
 660         case SOCAM_DATAWIDTH_8:
 661                 pcdev->is_16bit = 0;
 662                 break;
 663         case SOCAM_DATAWIDTH_16:
 664                 pcdev->is_16bit = 1;
 665                 break;
 666         default:
 667                 return -EINVAL;
 668         }
 669
 670         ceu_write(pcdev, CRCNTR, 0);
 671         ceu_write(pcdev, CRCMPR, 0);
 672
 673         value = 0x00000010; /* data fetch by default */
 674         yuv_lineskip = 0;
 675
 676         switch (icd->current_fmt->fourcc) {
 677         case V4L2_PIX_FMT_NV12:
 678         case V4L2_PIX_FMT_NV21:
 679                 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
 680                 /* fall-through */
 681         case V4L2_PIX_FMT_NV16:
 682         case V4L2_PIX_FMT_NV61:
 683                 switch (cam->camera_fmt->fourcc) {
 684                 case V4L2_PIX_FMT_UYVY:
 685                         value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
 686                         break;
 687                 case V4L2_PIX_FMT_VYUY:
 688                         value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
 689                         break;
 690                 case V4L2_PIX_FMT_YUYV:
 691                         value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
 692                         break;
 693                 case V4L2_PIX_FMT_YVYU:
 694                         value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
 695                         break;
 696                 default:
 697                         BUG();
 698                 }
 699         }
 700
 701         if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
 702             icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
 703                 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
 704
 705         value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
 706         value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
 707         value |= pcdev->is_16bit ? 1 << 12 : 0;
 708         ceu_write(pcdev, CAMCR, value);
 709
 710         ceu_write(pcdev, CAPCR, 0x00300000);
 711         ceu_write(pcdev, CAIFR, pcdev->is_interlaced ? 0x101 : 0);
 712
 713         sh_mobile_ceu_set_rect(icd, icd->user_width, icd->user_height);
 714         mdelay(1);
 715
 716         ceu_write(pcdev, CFLCR, pcdev->cflcr);
 717
 718         /*
 719          * A few words about byte order (observed in Big Endian mode)
 720          *
 721          * In data fetch mode bytes are received in chunks of 8 bytes.
 722          * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
 723          *
 724          * The data is however by default written to memory in reverse order:
 725          * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
 726          *
 727          * The lowest three bits of CDOCR allows us to do swapping,
 728          * using 7 we swap the data bytes to match the incoming order:
 729          * D0, D1, D2, D3, D4, D5, D6, D7
 730          */
 731         value = 0x00000017;
 732         if (yuv_lineskip)
 733                 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
 734
 735         ceu_write(pcdev, CDOCR, value);
 736         ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
 737
 738         dev_dbg(icd->dev.parent, "S_FMT successful for %c%c%c%c %ux%u\n",
 739                 pixfmt & 0xff, (pixfmt >> 8) & 0xff,
 740                 (pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
 741                 icd->user_width, icd->user_height);
 742
 743         capture_restore(pcdev, capsr);
 744
 745         /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
 746         return 0;
 747 }
 748
 749 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
 750 {
 751         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 752         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 753         unsigned long camera_flags, common_flags;
 754
 755         camera_flags = icd->ops->query_bus_param(icd);
 756         common_flags = soc_camera_bus_param_compatible(camera_flags,
 757                                                        make_bus_param(pcdev));
 758         if (!common_flags)
 759                 return -EINVAL;
 760
 761         return 0;
 762 }
 763
 764 static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
 765         {
 766                 .name           = "NV12",
 767                 .depth          = 12,
 768                 .fourcc         = V4L2_PIX_FMT_NV12,
 769                 .colorspace     = V4L2_COLORSPACE_JPEG,
 770         },
 771         {
 772                 .name           = "NV21",
 773                 .depth          = 12,
 774                 .fourcc         = V4L2_PIX_FMT_NV21,
 775                 .colorspace     = V4L2_COLORSPACE_JPEG,
 776         },
 777         {
 778                 .name           = "NV16",
 779                 .depth          = 16,
 780                 .fourcc         = V4L2_PIX_FMT_NV16,
 781                 .colorspace     = V4L2_COLORSPACE_JPEG,
 782         },
 783         {
 784                 .name           = "NV61",
 785                 .depth          = 16,
 786                 .fourcc         = V4L2_PIX_FMT_NV61,
 787                 .colorspace     = V4L2_COLORSPACE_JPEG,
 788         },
 789 };
 790
 791 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
 792                                      struct soc_camera_format_xlate *xlate)
 793 {
 794         struct device *dev = icd->dev.parent;
 795         int ret, k, n;
 796         int formats = 0;
 797         struct sh_mobile_ceu_cam *cam;
 798
 799         ret = sh_mobile_ceu_try_bus_param(icd);
 800         if (ret < 0)
 801                 return 0;
 802
 803         if (!icd->host_priv) {
 804                 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
 805                 if (!cam)
 806                         return -ENOMEM;
 807
 808                 icd->host_priv = cam;
 809         } else {
 810                 cam = icd->host_priv;
 811         }
 812
 813         /* Beginning of a pass */
 814         if (!idx)
 815                 cam->extra_fmt = NULL;
 816
 817         switch (icd->formats[idx].fourcc) {
 818         case V4L2_PIX_FMT_UYVY:
 819         case V4L2_PIX_FMT_VYUY:
 820         case V4L2_PIX_FMT_YUYV:
 821         case V4L2_PIX_FMT_YVYU:
 822                 if (cam->extra_fmt)
 823                         goto add_single_format;
 824
 825                 /*
 826                  * Our case is simple so far: for any of the above four camera
 827                  * formats we add all our four synthesized NV* formats, so,
 828                  * just marking the device with a single flag suffices. If
 829                  * the format generation rules are more complex, you would have
 830                  * to actually hang your already added / counted formats onto
 831                  * the host_priv pointer and check whether the format you're
 832                  * going to add now is already there.
 833                  */
 834                 cam->extra_fmt = (void *)sh_mobile_ceu_formats;
 835
 836                 n = ARRAY_SIZE(sh_mobile_ceu_formats);
 837                 formats += n;
 838                 for (k = 0; xlate && k < n; k++) {
 839                         xlate->host_fmt = &sh_mobile_ceu_formats[k];
 840                         xlate->cam_fmt = icd->formats + idx;
 841                         xlate->buswidth = icd->formats[idx].depth;
 842                         xlate++;
 843                         dev_dbg(dev, "Providing format %s using %s\n",
 844                                 sh_mobile_ceu_formats[k].name,
 845                                 icd->formats[idx].name);
 846                 }
 847         default:
 848 add_single_format:
 849                 /* Generic pass-through */
 850                 formats++;
 851                 if (xlate) {
 852                         xlate->host_fmt = icd->formats + idx;
 853                         xlate->cam_fmt = icd->formats + idx;
 854                         xlate->buswidth = icd->formats[idx].depth;
 855                         xlate++;
 856                         dev_dbg(dev,
 857                                 "Providing format %s in pass-through mode\n",
 858                                 icd->formats[idx].name);
 859                 }
 860         }
 861
 862         return formats;
 863 }
 864
 865 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
 866 {
 867         kfree(icd->host_priv);
 868         icd->host_priv = NULL;
 869 }
 870
 871 /* Check if any dimension of r1 is smaller than respective one of r2 */
 872 static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2)
 873 {
 874         return r1->width < r2->width || r1->height < r2->height;
 875 }
 876
 877 /* Check if r1 fails to cover r2 */
 878 static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2)
 879 {
 880         return r1->left > r2->left || r1->top > r2->top ||
 881                 r1->left + r1->width < r2->left + r2->width ||
 882                 r1->top + r1->height < r2->top + r2->height;
 883 }
 884
 885 static unsigned int scale_down(unsigned int size, unsigned int scale)
 886 {
 887         return (size * 4096 + scale / 2) / scale;
 888 }
 889
 890 static unsigned int scale_up(unsigned int size, unsigned int scale)
 891 {
 892         return (size * scale + 2048) / 4096;
 893 }
 894
 895 static unsigned int calc_generic_scale(unsigned int input, unsigned int output)
 896 {
 897         return (input * 4096 + output / 2) / output;
 898 }
 899
 900 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect)
 901 {
 902         struct v4l2_crop crop;
 903         struct v4l2_cropcap cap;
 904         int ret;
 905
 906         crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 907
 908         ret = v4l2_subdev_call(sd, video, g_crop, &crop);
 909         if (!ret) {
 910                 *rect = crop.c;
 911                 return ret;
 912         }
 913
 914         /* Camera driver doesn't support .g_crop(), assume default rectangle */
 915         cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 916
 917         ret = v4l2_subdev_call(sd, video, cropcap, &cap);
 918         if (ret < 0)
 919                 return ret;
 920
 921         *rect = cap.defrect;
 922
 923         return ret;
 924 }
 925
 926 /*
 927  * The common for both scaling and cropping iterative approach is:
 928  * 1. try if the client can produce exactly what requested by the user
 929  * 2. if (1) failed, try to double the client image until we get one big enough
 930  * 3. if (2) failed, try to request the maximum image
 931  */
 932 static int client_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *crop,
 933                          struct v4l2_crop *cam_crop)
 934 {
 935         struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c;
 936         struct device *dev = sd->v4l2_dev->dev;
 937         struct v4l2_cropcap cap;
 938         int ret;
 939         unsigned int width, height;
 940
 941         v4l2_subdev_call(sd, video, s_crop, crop);
 942         ret = client_g_rect(sd, cam_rect);
 943         if (ret < 0)
 944                 return ret;
 945
 946         /*
 947          * Now cam_crop contains the current camera input rectangle, and it must
 948          * be within camera cropcap bounds
 949          */
 950         if (!memcmp(rect, cam_rect, sizeof(*rect))) {
 951                 /* Even if camera S_CROP failed, but camera rectangle matches */
 952                 dev_dbg(dev, "Camera S_CROP successful for %ux%u@%u:%u\n",
 953                         rect->width, rect->height, rect->left, rect->top);
 954                 return 0;
 955         }
 956
 957         /* Try to fix cropping, that camera hasn't managed to set */
 958         dev_geo(dev, "Fix camera S_CROP for %ux%u@%u:%u to %ux%u@%u:%u\n",
 959                 cam_rect->width, cam_rect->height,
 960                 cam_rect->left, cam_rect->top,
 961                 rect->width, rect->height, rect->left, rect->top);
 962
 963         /* We need sensor maximum rectangle */
 964         ret = v4l2_subdev_call(sd, video, cropcap, &cap);
 965         if (ret < 0)
 966                 return ret;
 967
 968         soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2,
 969                               cap.bounds.width);
 970         soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4,
 971                               cap.bounds.height);
 972
 973         /*
 974          * Popular special case - some cameras can only handle fixed sizes like
 975          * QVGA, VGA,... Take care to avoid infinite loop.
 976          */
 977         width = max(cam_rect->width, 2);
 978         height = max(cam_rect->height, 2);
 979
 980         while (!ret && (is_smaller(cam_rect, rect) ||
 981                         is_inside(cam_rect, rect)) &&
 982                (cap.bounds.width > width || cap.bounds.height > height)) {
 983
 984                 width *= 2;
 985                 height *= 2;
 986
 987                 cam_rect->width = width;
 988                 cam_rect->height = height;
 989
 990                 /*
 991                  * We do not know what capabilities the camera has to set up
 992                  * left and top borders. We could try to be smarter in iterating
 993                  * them, e.g., if camera current left is to the right of the
 994                  * target left, set it to the middle point between the current
 995                  * left and minimum left. But that would add too much
 996                  * complexity: we would have to iterate each border separately.
 997                  */
 998                 if (cam_rect->left > rect->left)
 999                         cam_rect->left = cap.bounds.left;
1000
1001                 if (cam_rect->left + cam_rect->width < rect->left + rect->width)
1002                         cam_rect->width = rect->left + rect->width -
1003                                 cam_rect->left;
1004
1005                 if (cam_rect->top > rect->top)
1006                         cam_rect->top = cap.bounds.top;
1007
1008                 if (cam_rect->top + cam_rect->height < rect->top + rect->height)
1009                         cam_rect->height = rect->top + rect->height -
1010                                 cam_rect->top;
1011
1012                 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1013                 ret = client_g_rect(sd, cam_rect);
1014                 dev_geo(dev, "Camera S_CROP %d for %ux%u@%u:%u\n", ret,
1015                         cam_rect->width, cam_rect->height,
1016                         cam_rect->left, cam_rect->top);
1017         }
1018
1019         /* S_CROP must not modify the rectangle */
1020         if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) {
1021                 /*
1022                  * The camera failed to configure a suitable cropping,
1023                  * we cannot use the current rectangle, set to max
1024                  */
1025                 *cam_rect = cap.bounds;
1026                 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1027                 ret = client_g_rect(sd, cam_rect);
1028                 dev_geo(dev, "Camera S_CROP %d for max %ux%u@%u:%u\n", ret,
1029                         cam_rect->width, cam_rect->height,
1030                         cam_rect->left, cam_rect->top);
1031         }
1032
1033         return ret;
1034 }
1035
1036 static int get_camera_scales(struct v4l2_subdev *sd, struct v4l2_rect *rect,
1037                              unsigned int *scale_h, unsigned int *scale_v)
1038 {
1039         struct v4l2_format f;
1040         int ret;
1041
1042         f.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1043
1044         ret = v4l2_subdev_call(sd, video, g_fmt, &f);
1045         if (ret < 0)
1046                 return ret;
1047
1048         *scale_h = calc_generic_scale(rect->width, f.fmt.pix.width);
1049         *scale_v = calc_generic_scale(rect->height, f.fmt.pix.height);
1050
1051         return 0;
1052 }
1053
1054 static int get_camera_subwin(struct soc_camera_device *icd,
1055                              struct v4l2_rect *cam_subrect,
1056                              unsigned int cam_hscale, unsigned int cam_vscale)
1057 {
1058         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1059         struct v4l2_rect *ceu_rect = &cam->ceu_rect;
1060
1061         if (!ceu_rect->width) {
1062                 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1063                 struct device *dev = icd->dev.parent;
1064                 struct v4l2_format f;
1065                 struct v4l2_pix_format *pix = &f.fmt.pix;
1066                 int ret;
1067                 /* First time */
1068
1069                 f.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1070
1071                 ret = v4l2_subdev_call(sd, video, g_fmt, &f);
1072                 if (ret < 0)
1073                         return ret;
1074
1075                 dev_geo(dev, "camera fmt %ux%u\n", pix->width, pix->height);
1076
1077                 if (pix->width > 2560) {
1078                         ceu_rect->width  = 2560;
1079                         ceu_rect->left   = (pix->width - 2560) / 2;
1080                 } else {
1081                         ceu_rect->width  = pix->width;
1082                         ceu_rect->left   = 0;
1083                 }
1084
1085                 if (pix->height > 1920) {
1086                         ceu_rect->height = 1920;
1087                         ceu_rect->top    = (pix->height - 1920) / 2;
1088                 } else {
1089                         ceu_rect->height = pix->height;
1090                         ceu_rect->top    = 0;
1091                 }
1092
1093                 dev_geo(dev, "initialised CEU rect %ux%u@%u:%u\n",
1094                         ceu_rect->width, ceu_rect->height,
1095                         ceu_rect->left, ceu_rect->top);
1096         }
1097
1098         cam_subrect->width      = scale_up(ceu_rect->width, cam_hscale);
1099         cam_subrect->left       = scale_up(ceu_rect->left, cam_hscale);
1100         cam_subrect->height     = scale_up(ceu_rect->height, cam_vscale);
1101         cam_subrect->top        = scale_up(ceu_rect->top, cam_vscale);
1102
1103         return 0;
1104 }
1105
1106 static int client_s_fmt(struct soc_camera_device *icd, struct v4l2_format *f,
1107                         bool ceu_can_scale)
1108 {
1109         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1110         struct device *dev = icd->dev.parent;
1111         struct v4l2_pix_format *pix = &f->fmt.pix;
1112         unsigned int width = pix->width, height = pix->height, tmp_w, tmp_h;
1113         unsigned int max_width, max_height;
1114         struct v4l2_cropcap cap;
1115         int ret;
1116
1117         cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1118
1119         ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1120         if (ret < 0)
1121                 return ret;
1122
1123         max_width = min(cap.bounds.width, 2560);
1124         max_height = min(cap.bounds.height, 1920);
1125
1126         ret = v4l2_subdev_call(sd, video, s_fmt, f);
1127         if (ret < 0)
1128                 return ret;
1129
1130         dev_geo(dev, "camera scaled to %ux%u\n", pix->width, pix->height);
1131
1132         if ((width == pix->width && height == pix->height) || !ceu_can_scale)
1133                 return 0;
1134
1135         /* Camera set a format, but geometry is not precise, try to improve */
1136         tmp_w = pix->width;
1137         tmp_h = pix->height;
1138
1139         /* width <= max_width && height <= max_height - guaranteed by try_fmt */
1140         while ((width > tmp_w || height > tmp_h) &&
1141                tmp_w < max_width && tmp_h < max_height) {
1142                 tmp_w = min(2 * tmp_w, max_width);
1143                 tmp_h = min(2 * tmp_h, max_height);
1144                 pix->width = tmp_w;
1145                 pix->height = tmp_h;
1146                 ret = v4l2_subdev_call(sd, video, s_fmt, f);
1147                 dev_geo(dev, "Camera scaled to %ux%u\n",
1148                         pix->width, pix->height);
1149                 if (ret < 0) {
1150                         /* This shouldn't happen */
1151                         dev_err(dev, "Client failed to set format: %d\n", ret);
1152                         return ret;
1153                 }
1154         }
1155
1156         return 0;
1157 }
1158
1159 /**
1160  * @rect        - camera cropped rectangle
1161  * @sub_rect    - CEU cropped rectangle, mapped back to camera input area
1162  * @ceu_rect    - on output calculated CEU crop rectangle
1163  */
1164 static int client_scale(struct soc_camera_device *icd, struct v4l2_rect *rect,
1165                         struct v4l2_rect *sub_rect, struct v4l2_rect *ceu_rect,
1166                         struct v4l2_format *f, bool ceu_can_scale)
1167 {
1168         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1169         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1170         struct device *dev = icd->dev.parent;
1171         struct v4l2_format f_tmp = *f;
1172         struct v4l2_pix_format *pix_tmp = &f_tmp.fmt.pix;
1173         unsigned int scale_h, scale_v;
1174         int ret;
1175
1176         /* 5. Apply iterative camera S_FMT for camera user window. */
1177         ret = client_s_fmt(icd, &f_tmp, ceu_can_scale);
1178         if (ret < 0)
1179                 return ret;
1180
1181         dev_geo(dev, "5: camera scaled to %ux%u\n",
1182                 pix_tmp->width, pix_tmp->height);
1183
1184         /* 6. Retrieve camera output window (g_fmt) */
1185
1186         /* unneeded - it is already in "f_tmp" */
1187
1188         /* 7. Calculate new camera scales. */
1189         ret = get_camera_scales(sd, rect, &scale_h, &scale_v);
1190         if (ret < 0)
1191                 return ret;
1192
1193         dev_geo(dev, "7: camera scales %u:%u\n", scale_h, scale_v);
1194
1195         cam->cam_width          = pix_tmp->width;
1196         cam->cam_height         = pix_tmp->height;
1197         f->fmt.pix.width        = pix_tmp->width;
1198         f->fmt.pix.height       = pix_tmp->height;
1199
1200         /*
1201          * 8. Calculate new CEU crop - apply camera scales to previously
1202          *    calculated "effective" crop.
1203          */
1204         ceu_rect->left = scale_down(sub_rect->left, scale_h);
1205         ceu_rect->width = scale_down(sub_rect->width, scale_h);
1206         ceu_rect->top = scale_down(sub_rect->top, scale_v);
1207         ceu_rect->height = scale_down(sub_rect->height, scale_v);
1208
1209         dev_geo(dev, "8: new CEU rect %ux%u@%u:%u\n",
1210                 ceu_rect->width, ceu_rect->height,
1211                 ceu_rect->left, ceu_rect->top);
1212
1213         return 0;
1214 }
1215
1216 /* Get combined scales */
1217 static int get_scales(struct soc_camera_device *icd,
1218                       unsigned int *scale_h, unsigned int *scale_v)
1219 {
1220         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1221         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1222         struct v4l2_crop cam_crop;
1223         unsigned int width_in, height_in;
1224         int ret;
1225
1226         cam_crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1227
1228         ret = client_g_rect(sd, &cam_crop.c);
1229         if (ret < 0)
1230                 return ret;
1231
1232         ret = get_camera_scales(sd, &cam_crop.c, scale_h, scale_v);
1233         if (ret < 0)
1234                 return ret;
1235
1236         width_in = scale_up(cam->ceu_rect.width, *scale_h);
1237         height_in = scale_up(cam->ceu_rect.height, *scale_v);
1238
1239         *scale_h = calc_generic_scale(width_in, icd->user_width);
1240         *scale_v = calc_generic_scale(height_in, icd->user_height);
1241
1242         return 0;
1243 }
1244
1245 /*
1246  * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1247  * framerate by always requesting the maximum image from the client. See
1248  * Documentation/video4linux/sh_mobile_camera_ceu.txt for a description of
1249  * scaling and cropping algorithms and for the meaning of referenced here steps.
1250  */
1251 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
1252                                   struct v4l2_crop *a)
1253 {
1254         struct v4l2_rect *rect = &a->c;
1255         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1256         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1257         struct v4l2_crop cam_crop;
1258         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1259         struct v4l2_rect *cam_rect = &cam_crop.c, *ceu_rect = &cam->ceu_rect;
1260         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1261         struct device *dev = icd->dev.parent;
1262         struct v4l2_format f;
1263         struct v4l2_pix_format *pix = &f.fmt.pix;
1264         unsigned int scale_comb_h, scale_comb_v, scale_ceu_h, scale_ceu_v,
1265                 out_width, out_height;
1266         u32 capsr, cflcr;
1267         int ret;
1268
1269         /* 1. Calculate current combined scales. */
1270         ret = get_scales(icd, &scale_comb_h, &scale_comb_v);
1271         if (ret < 0)
1272                 return ret;
1273
1274         dev_geo(dev, "1: combined scales %u:%u\n", scale_comb_h, scale_comb_v);
1275
1276         /* 2. Apply iterative camera S_CROP for new input window. */
1277         ret = client_s_crop(sd, a, &cam_crop);
1278         if (ret < 0)
1279                 return ret;
1280
1281         dev_geo(dev, "2: camera cropped to %ux%u@%u:%u\n",
1282                 cam_rect->width, cam_rect->height,
1283                 cam_rect->left, cam_rect->top);
1284
1285         /* On success cam_crop contains current camera crop */
1286
1287         /*
1288          * 3. If old combined scales applied to new crop produce an impossible
1289          *    user window, adjust scales to produce nearest possible window.
1290          */
1291         out_width       = scale_down(rect->width, scale_comb_h);
1292         out_height      = scale_down(rect->height, scale_comb_v);
1293
1294         if (out_width > 2560)
1295                 out_width = 2560;
1296         else if (out_width < 2)
1297                 out_width = 2;
1298
1299         if (out_height > 1920)
1300                 out_height = 1920;
1301         else if (out_height < 4)
1302                 out_height = 4;
1303
1304         dev_geo(dev, "3: Adjusted output %ux%u\n", out_width, out_height);
1305
1306         /* 4. Use G_CROP to retrieve actual input window: already in cam_crop */
1307
1308         /*
1309          * 5. Using actual input window and calculated combined scales calculate
1310          *    camera target output window.
1311          */
1312         pix->width              = scale_down(cam_rect->width, scale_comb_h);
1313         pix->height             = scale_down(cam_rect->height, scale_comb_v);
1314
1315         dev_geo(dev, "5: camera target %ux%u\n", pix->width, pix->height);
1316
1317         /* 6. - 9. */
1318         pix->pixelformat        = cam->camera_fmt->fourcc;
1319         pix->colorspace         = cam->camera_fmt->colorspace;
1320
1321         capsr = capture_save_reset(pcdev);
1322         dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1323
1324         /* Make relative to camera rectangle */
1325         rect->left              -= cam_rect->left;
1326         rect->top               -= cam_rect->top;
1327
1328         f.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1329
1330         ret = client_scale(icd, cam_rect, rect, ceu_rect, &f,
1331                            pcdev->image_mode && !pcdev->is_interlaced);
1332
1333         dev_geo(dev, "6-9: %d\n", ret);
1334
1335         /* 10. Use CEU cropping to crop to the new window. */
1336         sh_mobile_ceu_set_rect(icd, out_width, out_height);
1337
1338         dev_geo(dev, "10: CEU cropped to %ux%u@%u:%u\n",
1339                 ceu_rect->width, ceu_rect->height,
1340                 ceu_rect->left, ceu_rect->top);
1341
1342         /*
1343          * 11. Calculate CEU scales from camera scales from results of (10) and
1344          *     user window from (3)
1345          */
1346         scale_ceu_h = calc_scale(ceu_rect->width, &out_width);
1347         scale_ceu_v = calc_scale(ceu_rect->height, &out_height);
1348
1349         dev_geo(dev, "11: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1350
1351         /* 12. Apply CEU scales. */
1352         cflcr = scale_ceu_h | (scale_ceu_v << 16);
1353         if (cflcr != pcdev->cflcr) {
1354                 pcdev->cflcr = cflcr;
1355                 ceu_write(pcdev, CFLCR, cflcr);
1356         }
1357
1358         /* Restore capture */
1359         if (pcdev->active)
1360                 capsr |= 1;
1361         capture_restore(pcdev, capsr);
1362
1363         icd->user_width = out_width;
1364         icd->user_height = out_height;
1365
1366         /* Even if only camera cropping succeeded */
1367         return ret;
1368 }
1369
1370 /* Similar to set_crop multistage iterative algorithm */
1371 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1372                                  struct v4l2_format *f)
1373 {
1374         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1375         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1376         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1377         struct v4l2_pix_format *pix = &f->fmt.pix;
1378         struct v4l2_format cam_f = *f;
1379         struct v4l2_pix_format *cam_pix = &cam_f.fmt.pix;
1380         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1381         struct device *dev = icd->dev.parent;
1382         __u32 pixfmt = pix->pixelformat;
1383         const struct soc_camera_format_xlate *xlate;
1384         struct v4l2_crop cam_crop;
1385         struct v4l2_rect *cam_rect = &cam_crop.c, cam_subrect, ceu_rect;
1386         unsigned int scale_cam_h, scale_cam_v;
1387         u16 scale_v, scale_h;
1388         int ret;
1389         bool is_interlaced, image_mode;
1390
1391         switch (pix->field) {
1392         case V4L2_FIELD_INTERLACED:
1393                 is_interlaced = true;
1394                 break;
1395         case V4L2_FIELD_ANY:
1396         default:
1397                 pix->field = V4L2_FIELD_NONE;
1398                 /* fall-through */
1399         case V4L2_FIELD_NONE:
1400                 is_interlaced = false;
1401                 break;
1402         }
1403
1404         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1405         if (!xlate) {
1406                 dev_warn(dev, "Format %x not found\n", pixfmt);
1407                 return -EINVAL;
1408         }
1409
1410         /* 1. Calculate current camera scales. */
1411         cam_crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1412
1413         ret = client_g_rect(sd, cam_rect);
1414         if (ret < 0)
1415                 return ret;
1416
1417         ret = get_camera_scales(sd, cam_rect, &scale_cam_h, &scale_cam_v);
1418         if (ret < 0)
1419                 return ret;
1420
1421         dev_geo(dev, "1: camera scales %u:%u\n", scale_cam_h, scale_cam_v);
1422
1423         /*
1424          * 2. Calculate "effective" input crop (sensor subwindow) - CEU crop
1425          *    scaled back at current camera scales onto input window.
1426          */
1427         ret = get_camera_subwin(icd, &cam_subrect, scale_cam_h, scale_cam_v);
1428         if (ret < 0)
1429                 return ret;
1430
1431         dev_geo(dev, "2: subwin %ux%u@%u:%u\n",
1432                 cam_subrect.width, cam_subrect.height,
1433                 cam_subrect.left, cam_subrect.top);
1434
1435         /*
1436          * 3. Calculate new combined scales from "effective" input window to
1437          *    requested user window.
1438          */
1439         scale_h = calc_generic_scale(cam_subrect.width, pix->width);
1440         scale_v = calc_generic_scale(cam_subrect.height, pix->height);
1441
1442         dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v);
1443
1444         /*
1445          * 4. Calculate camera output window by applying combined scales to real
1446          *    input window.
1447          */
1448         cam_pix->width = scale_down(cam_rect->width, scale_h);
1449         cam_pix->height = scale_down(cam_rect->height, scale_v);
1450         cam_pix->pixelformat = xlate->cam_fmt->fourcc;
1451
1452         switch (pixfmt) {
1453         case V4L2_PIX_FMT_NV12:
1454         case V4L2_PIX_FMT_NV21:
1455         case V4L2_PIX_FMT_NV16:
1456         case V4L2_PIX_FMT_NV61:
1457                 image_mode = true;
1458                 break;
1459         default:
1460                 image_mode = false;
1461         }
1462
1463         dev_geo(dev, "4: camera output %ux%u\n",
1464                 cam_pix->width, cam_pix->height);
1465
1466         /* 5. - 9. */
1467         ret = client_scale(icd, cam_rect, &cam_subrect, &ceu_rect, &cam_f,
1468                            image_mode && !is_interlaced);
1469
1470         dev_geo(dev, "5-9: client scale %d\n", ret);
1471
1472         /* Done with the camera. Now see if we can improve the result */
1473
1474         dev_dbg(dev, "Camera %d fmt %ux%u, requested %ux%u\n",
1475                 ret, cam_pix->width, cam_pix->height, pix->width, pix->height);
1476         if (ret < 0)
1477                 return ret;
1478
1479         /* 10. Use CEU scaling to scale to the requested user window. */
1480
1481         /* We cannot scale up */
1482         if (pix->width > cam_pix->width)
1483                 pix->width = cam_pix->width;
1484         if (pix->width > ceu_rect.width)
1485                 pix->width = ceu_rect.width;
1486
1487         if (pix->height > cam_pix->height)
1488                 pix->height = cam_pix->height;
1489         if (pix->height > ceu_rect.height)
1490                 pix->height = ceu_rect.height;
1491
1492         /* Let's rock: scale pix->{width x height} down to width x height */
1493         scale_h = calc_scale(ceu_rect.width, &pix->width);
1494         scale_v = calc_scale(ceu_rect.height, &pix->height);
1495
1496         dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1497                 ceu_rect.width, scale_h, pix->width,
1498                 ceu_rect.height, scale_v, pix->height);
1499
1500         pcdev->cflcr = scale_h | (scale_v << 16);
1501
1502         icd->buswidth = xlate->buswidth;
1503         icd->current_fmt = xlate->host_fmt;
1504         cam->camera_fmt = xlate->cam_fmt;
1505         cam->ceu_rect = ceu_rect;
1506
1507         pcdev->is_interlaced = is_interlaced;
1508         pcdev->image_mode = image_mode;
1509
1510         return 0;
1511 }
1512
1513 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1514                                  struct v4l2_format *f)
1515 {
1516         const struct soc_camera_format_xlate *xlate;
1517         struct v4l2_pix_format *pix = &f->fmt.pix;
1518         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1519         __u32 pixfmt = pix->pixelformat;
1520         int width, height;
1521         int ret;
1522
1523         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1524         if (!xlate) {
1525                 dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt);
1526                 return -EINVAL;
1527         }
1528
1529         /* FIXME: calculate using depth and bus width */
1530
1531         v4l_bound_align_image(&pix->width, 2, 2560, 1,
1532                               &pix->height, 4, 1920, 2, 0);
1533
1534         width = pix->width;
1535         height = pix->height;
1536
1537         pix->bytesperline = pix->width *
1538                 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
1539         pix->sizeimage = pix->height * pix->bytesperline;
1540
1541         pix->pixelformat = xlate->cam_fmt->fourcc;
1542
1543         /* limit to sensor capabilities */
1544         ret = v4l2_subdev_call(sd, video, try_fmt, f);
1545         pix->pixelformat = pixfmt;
1546         if (ret < 0)
1547                 return ret;
1548
1549         switch (pixfmt) {
1550         case V4L2_PIX_FMT_NV12:
1551         case V4L2_PIX_FMT_NV21:
1552         case V4L2_PIX_FMT_NV16:
1553         case V4L2_PIX_FMT_NV61:
1554                 /* FIXME: check against rect_max after converting soc-camera */
1555                 /* We can scale precisely, need a bigger image from camera */
1556                 if (pix->width < width || pix->height < height) {
1557                         int tmp_w = pix->width, tmp_h = pix->height;
1558                         pix->width = 2560;
1559                         pix->height = 1920;
1560                         ret = v4l2_subdev_call(sd, video, try_fmt, f);
1561                         if (ret < 0) {
1562                                 /* Shouldn't actually happen... */
1563                                 dev_err(icd->dev.parent,
1564                                         "FIXME: try_fmt() returned %d\n", ret);
1565                                 pix->width = tmp_w;
1566                                 pix->height = tmp_h;
1567                         }
1568                 }
1569                 if (pix->width > width)
1570                         pix->width = width;
1571                 if (pix->height > height)
1572                         pix->height = height;
1573         }
1574
1575         return ret;
1576 }
1577
1578 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
1579                                  struct v4l2_requestbuffers *p)
1580 {
1581         int i;
1582
1583         /*
1584          * This is for locking debugging only. I removed spinlocks and now I
1585          * check whether .prepare is ever called on a linked buffer, or whether
1586          * a dma IRQ can occur for an in-work or unlinked buffer. Until now
1587          * it hadn't triggered
1588          */
1589         for (i = 0; i < p->count; i++) {
1590                 struct sh_mobile_ceu_buffer *buf;
1591
1592                 buf = container_of(icf->vb_vidq.bufs[i],
1593                                    struct sh_mobile_ceu_buffer, vb);
1594                 INIT_LIST_HEAD(&buf->vb.queue);
1595         }
1596
1597         return 0;
1598 }
1599
1600 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1601 {
1602         struct soc_camera_file *icf = file->private_data;
1603         struct sh_mobile_ceu_buffer *buf;
1604
1605         buf = list_entry(icf->vb_vidq.stream.next,
1606                          struct sh_mobile_ceu_buffer, vb.stream);
1607
1608         poll_wait(file, &buf->vb.done, pt);
1609
1610         if (buf->vb.state == VIDEOBUF_DONE ||
1611             buf->vb.state == VIDEOBUF_ERROR)
1612                 return POLLIN|POLLRDNORM;
1613
1614         return 0;
1615 }
1616
1617 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1618                                   struct v4l2_capability *cap)
1619 {
1620         strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1621         cap->version = KERNEL_VERSION(0, 0, 5);
1622         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1623         return 0;
1624 }
1625
1626 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
1627                                         struct soc_camera_device *icd)
1628 {
1629         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1630         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1631
1632         videobuf_queue_dma_contig_init(q,
1633                                        &sh_mobile_ceu_videobuf_ops,
1634                                        icd->dev.parent, &pcdev->lock,
1635                                        V4L2_BUF_TYPE_VIDEO_CAPTURE,
1636                                        pcdev->is_interlaced ?
1637                                        V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE,
1638                                        sizeof(struct sh_mobile_ceu_buffer),
1639                                        icd);
1640 }
1641
1642 static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd,
1643                                   struct v4l2_control *ctrl)
1644 {
1645         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1646         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1647         u32 val;
1648
1649         switch (ctrl->id) {
1650         case V4L2_CID_SHARPNESS:
1651                 val = ceu_read(pcdev, CLFCR);
1652                 ctrl->value = val ^ 1;
1653                 return 0;
1654         }
1655         return -ENOIOCTLCMD;
1656 }
1657
1658 static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd,
1659                                   struct v4l2_control *ctrl)
1660 {
1661         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1662         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1663
1664         switch (ctrl->id) {
1665         case V4L2_CID_SHARPNESS:
1666                 switch (icd->current_fmt->fourcc) {
1667                 case V4L2_PIX_FMT_NV12:
1668                 case V4L2_PIX_FMT_NV21:
1669                 case V4L2_PIX_FMT_NV16:
1670                 case V4L2_PIX_FMT_NV61:
1671                         ceu_write(pcdev, CLFCR, !ctrl->value);
1672                         return 0;
1673                 }
1674                 return -EINVAL;
1675         }
1676         return -ENOIOCTLCMD;
1677 }
1678
1679 static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = {
1680         {
1681                 .id             = V4L2_CID_SHARPNESS,
1682                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
1683                 .name           = "Low-pass filter",
1684                 .minimum        = 0,
1685                 .maximum        = 1,
1686                 .step           = 1,
1687                 .default_value  = 0,
1688         },
1689 };
1690
1691 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
1692         .owner          = THIS_MODULE,
1693         .add            = sh_mobile_ceu_add_device,
1694         .remove         = sh_mobile_ceu_remove_device,
1695         .get_formats    = sh_mobile_ceu_get_formats,
1696         .put_formats    = sh_mobile_ceu_put_formats,
1697         .set_crop       = sh_mobile_ceu_set_crop,
1698         .set_fmt        = sh_mobile_ceu_set_fmt,
1699         .try_fmt        = sh_mobile_ceu_try_fmt,
1700         .set_ctrl       = sh_mobile_ceu_set_ctrl,
1701         .get_ctrl       = sh_mobile_ceu_get_ctrl,
1702         .reqbufs        = sh_mobile_ceu_reqbufs,
1703         .poll           = sh_mobile_ceu_poll,
1704         .querycap       = sh_mobile_ceu_querycap,
1705         .set_bus_param  = sh_mobile_ceu_set_bus_param,
1706         .init_videobuf  = sh_mobile_ceu_init_videobuf,
1707         .controls       = sh_mobile_ceu_controls,
1708         .num_controls   = ARRAY_SIZE(sh_mobile_ceu_controls),
1709 };
1710
1711 static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
1712 {
1713         struct sh_mobile_ceu_dev *pcdev;
1714         struct resource *res;
1715         void __iomem *base;
1716         unsigned int irq;
1717         int err = 0;
1718
1719         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1720         irq = platform_get_irq(pdev, 0);
1721         if (!res || !irq) {
1722                 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
1723                 err = -ENODEV;
1724                 goto exit;
1725         }
1726
1727         pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
1728         if (!pcdev) {
1729                 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1730                 err = -ENOMEM;
1731                 goto exit;
1732         }
1733
1734         INIT_LIST_HEAD(&pcdev->capture);
1735         spin_lock_init(&pcdev->lock);
1736
1737         pcdev->pdata = pdev->dev.platform_data;
1738         if (!pcdev->pdata) {
1739                 err = -EINVAL;
1740                 dev_err(&pdev->dev, "CEU platform data not set.\n");
1741                 goto exit_kfree;
1742         }
1743
1744         base = ioremap_nocache(res->start, resource_size(res));
1745         if (!base) {
1746                 err = -ENXIO;
1747                 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
1748                 goto exit_kfree;
1749         }
1750
1751         pcdev->irq = irq;
1752         pcdev->base = base;
1753         pcdev->video_limit = 0; /* only enabled if second resource exists */
1754
1755         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1756         if (res) {
1757                 err = dma_declare_coherent_memory(&pdev->dev, res->start,
1758                                                   res->start,
1759                                                   resource_size(res),
1760                                                   DMA_MEMORY_MAP |
1761                                                   DMA_MEMORY_EXCLUSIVE);
1762                 if (!err) {
1763                         dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
1764                         err = -ENXIO;
1765                         goto exit_iounmap;
1766                 }
1767
1768                 pcdev->video_limit = resource_size(res);
1769         }
1770
1771         /* request irq */
1772         err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
1773                           dev_name(&pdev->dev), pcdev);
1774         if (err) {
1775                 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
1776                 goto exit_release_mem;
1777         }
1778
1779         pm_suspend_ignore_children(&pdev->dev, true);
1780         pm_runtime_enable(&pdev->dev);
1781         pm_runtime_resume(&pdev->dev);
1782
1783         pcdev->ici.priv = pcdev;
1784         pcdev->ici.v4l2_dev.dev = &pdev->dev;
1785         pcdev->ici.nr = pdev->id;
1786         pcdev->ici.drv_name = dev_name(&pdev->dev);
1787         pcdev->ici.ops = &sh_mobile_ceu_host_ops;
1788
1789         err = soc_camera_host_register(&pcdev->ici);
1790         if (err)
1791                 goto exit_free_clk;
1792
1793         return 0;
1794
1795 exit_free_clk:
1796         pm_runtime_disable(&pdev->dev);
1797         free_irq(pcdev->irq, pcdev);
1798 exit_release_mem:
1799         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1800                 dma_release_declared_memory(&pdev->dev);
1801 exit_iounmap:
1802         iounmap(base);
1803 exit_kfree:
1804         kfree(pcdev);
1805 exit:
1806         return err;
1807 }
1808
1809 static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
1810 {
1811         struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1812         struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
1813                                         struct sh_mobile_ceu_dev, ici);
1814
1815         soc_camera_host_unregister(soc_host);
1816         pm_runtime_disable(&pdev->dev);
1817         free_irq(pcdev->irq, pcdev);
1818         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1819                 dma_release_declared_memory(&pdev->dev);
1820         iounmap(pcdev->base);
1821         kfree(pcdev);
1822         return 0;
1823 }
1824
1825 static int sh_mobile_ceu_runtime_nop(struct device *dev)
1826 {
1827         /* Runtime PM callback shared between ->runtime_suspend()
1828          * and ->runtime_resume(). Simply returns success.
1829          *
1830          * This driver re-initializes all registers after
1831          * pm_runtime_get_sync() anyway so there is no need
1832          * to save and restore registers here.
1833          */
1834         return 0;
1835 }
1836
1837 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
1838         .runtime_suspend = sh_mobile_ceu_runtime_nop,
1839         .runtime_resume = sh_mobile_ceu_runtime_nop,
1840 };
1841
1842 static struct platform_driver sh_mobile_ceu_driver = {
1843         .driver         = {
1844                 .name   = "sh_mobile_ceu",
1845                 .pm     = &sh_mobile_ceu_dev_pm_ops,
1846         },
1847         .probe          = sh_mobile_ceu_probe,
1848         .remove         = __devexit_p(sh_mobile_ceu_remove),
1849 };
1850
1851 static int __init sh_mobile_ceu_init(void)
1852 {
1853         return platform_driver_register(&sh_mobile_ceu_driver);
1854 }
1855
1856 static void __exit sh_mobile_ceu_exit(void)
1857 {
1858         platform_driver_unregister(&sh_mobile_ceu_driver);
1859 }
1860
1861 module_init(sh_mobile_ceu_init);
1862 module_exit(sh_mobile_ceu_exit);
1863
1864 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
1865 MODULE_AUTHOR("Magnus Damm");
1866 MODULE_LICENSE("GPL");
1867 MODULE_ALIAS("platform:sh_mobile_ceu");