drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * V4L2 Driver for SuperH Mobile CEU interface
   4  *
   5  * Copyright (C) 2008 Magnus Damm
   6  *
   7  * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
   8  *
   9  * Copyright (C) 2006, Sascha Hauer, Pengutronix
  10  * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
  11  */
  12
  13 #include <linux/init.h>
  14 #include <linux/module.h>
  15 #include <linux/io.h>
  16 #include <linux/completion.h>
  17 #include <linux/delay.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/err.h>
  20 #include <linux/errno.h>
  21 #include <linux/fs.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/kernel.h>
  24 #include <linux/mm.h>
  25 #include <linux/moduleparam.h>
  26 #include <linux/of.h>
  27 #include <linux/time.h>
  28 #include <linux/slab.h>
  29 #include <linux/device.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/videodev2.h>
  32 #include <linux/pm_runtime.h>
  33 #include <linux/sched.h>
  34
  35 #include <media/v4l2-async.h>
  36 #include <media/v4l2-common.h>
  37 #include <media/v4l2-dev.h>
  38 #include <media/soc_camera.h>
  39 #include <media/drv-intf/sh_mobile_ceu.h>
  40 #include <media/videobuf2-dma-contig.h>
  41 #include <media/v4l2-mediabus.h>
  42 #include <media/drv-intf/soc_mediabus.h>
  43
  44 #include "soc_scale_crop.h"
  45
  46 /* register offsets for sh7722 / sh7723 */
  47
  48 #define CAPSR  0x00 /* Capture start register */
  49 #define CAPCR  0x04 /* Capture control register */
  50 #define CAMCR  0x08 /* Capture interface control register */
  51 #define CMCYR  0x0c /* Capture interface cycle  register */
  52 #define CAMOR  0x10 /* Capture interface offset register */
  53 #define CAPWR  0x14 /* Capture interface width register */
  54 #define CAIFR  0x18 /* Capture interface input format register */
  55 #define CSTCR  0x20 /* Camera strobe control register (<= sh7722) */
  56 #define CSECR  0x24 /* Camera strobe emission count register (<= sh7722) */
  57 #define CRCNTR 0x28 /* CEU register control register */
  58 #define CRCMPR 0x2c /* CEU register forcible control register */
  59 #define CFLCR  0x30 /* Capture filter control register */
  60 #define CFSZR  0x34 /* Capture filter size clip register */
  61 #define CDWDR  0x38 /* Capture destination width register */
  62 #define CDAYR  0x3c /* Capture data address Y register */
  63 #define CDACR  0x40 /* Capture data address C register */
  64 #define CDBYR  0x44 /* Capture data bottom-field address Y register */
  65 #define CDBCR  0x48 /* Capture data bottom-field address C register */
  66 #define CBDSR  0x4c /* Capture bundle destination size register */
  67 #define CFWCR  0x5c /* Firewall operation control register */
  68 #define CLFCR  0x60 /* Capture low-pass filter control register */
  69 #define CDOCR  0x64 /* Capture data output control register */
  70 #define CDDCR  0x68 /* Capture data complexity level register */
  71 #define CDDAR  0x6c /* Capture data complexity level address register */
  72 #define CEIER  0x70 /* Capture event interrupt enable register */
  73 #define CETCR  0x74 /* Capture event flag clear register */
  74 #define CSTSR  0x7c /* Capture status register */
  75 #define CSRTR  0x80 /* Capture software reset register */
  76 #define CDSSR  0x84 /* Capture data size register */
  77 #define CDAYR2 0x90 /* Capture data address Y register 2 */
  78 #define CDACR2 0x94 /* Capture data address C register 2 */
  79 #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
  80 #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
  81
  82 #undef DEBUG_GEOMETRY
  83 #ifdef DEBUG_GEOMETRY
  84 #define dev_geo dev_info
  85 #else
  86 #define dev_geo dev_dbg
  87 #endif
  88
  89 /* per video frame buffer */
  90 struct sh_mobile_ceu_buffer {
  91         struct vb2_v4l2_buffer vb; /* v4l buffer must be first */
  92         struct list_head queue;
  93 };
  94
  95 struct sh_mobile_ceu_dev {
  96         struct soc_camera_host ici;
  97
  98         unsigned int irq;
  99         void __iomem *base;
 100         size_t video_limit;
 101         size_t buf_total;
 102
 103         spinlock_t lock;                /* Protects video buffer lists */
 104         struct list_head capture;
 105         struct vb2_v4l2_buffer *active;
 106
 107         struct sh_mobile_ceu_info *pdata;
 108         struct completion complete;
 109
 110         u32 cflcr;
 111
 112         /* static max sizes either from platform data or default */
 113         int max_width;
 114         int max_height;
 115
 116         enum v4l2_field field;
 117         int sequence;
 118         unsigned long flags;
 119
 120         unsigned int image_mode:1;
 121         unsigned int is_16bit:1;
 122         unsigned int frozen:1;
 123 };
 124
 125 struct sh_mobile_ceu_cam {
 126         /* CEU offsets within the camera output, before the CEU scaler */
 127         unsigned int ceu_left;
 128         unsigned int ceu_top;
 129         /* Client output, as seen by the CEU */
 130         unsigned int width;
 131         unsigned int height;
 132         /*
 133          * User window from S_SELECTION / G_SELECTION, produced by client cropping and
 134          * scaling, CEU scaling and CEU cropping, mapped back onto the client
 135          * input window
 136          */
 137         struct v4l2_rect subrect;
 138         /* Camera cropping rectangle */
 139         struct v4l2_rect rect;
 140         const struct soc_mbus_pixelfmt *extra_fmt;
 141         u32 code;
 142 };
 143
 144 static struct sh_mobile_ceu_buffer *to_ceu_vb(struct vb2_v4l2_buffer *vbuf)
 145 {
 146         return container_of(vbuf, struct sh_mobile_ceu_buffer, vb);
 147 }
 148
 149 static void ceu_write(struct sh_mobile_ceu_dev *priv,
 150                       unsigned long reg_offs, u32 data)
 151 {
 152         iowrite32(data, priv->base + reg_offs);
 153 }
 154
 155 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
 156 {
 157         return ioread32(priv->base + reg_offs);
 158 }
 159
 160 static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
 161 {
 162         int i, success = 0;
 163
 164         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
 165
 166         /* wait CSTSR.CPTON bit */
 167         for (i = 0; i < 1000; i++) {
 168                 if (!(ceu_read(pcdev, CSTSR) & 1)) {
 169                         success++;
 170                         break;
 171                 }
 172                 udelay(1);
 173         }
 174
 175         /* wait CAPSR.CPKIL bit */
 176         for (i = 0; i < 1000; i++) {
 177                 if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
 178                         success++;
 179                         break;
 180                 }
 181                 udelay(1);
 182         }
 183
 184         if (2 != success) {
 185                 dev_warn(pcdev->ici.v4l2_dev.dev, "soft reset time out\n");
 186                 return -EIO;
 187         }
 188
 189         return 0;
 190 }
 191
 192 /*
 193  *  Videobuf operations
 194  */
 195
 196 /*
 197  * .queue_setup() is called to check, whether the driver can accept the
 198  *                requested number of buffers and to fill in plane sizes
 199  *                for the current frame format if required
 200  */
 201 static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
 202                         unsigned int *count, unsigned int *num_planes,
 203                         unsigned int sizes[], struct device *alloc_devs[])
 204 {
 205         struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
 206         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 207         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 208
 209         if (!vq->num_buffers)
 210                 pcdev->sequence = 0;
 211
 212         if (!*count)
 213                 *count = 2;
 214
 215         /* Called from VIDIOC_REQBUFS or in compatibility mode */
 216         if (!*num_planes)
 217                 sizes[0] = icd->sizeimage;
 218         else if (sizes[0] < icd->sizeimage)
 219                 return -EINVAL;
 220
 221         /* If *num_planes != 0, we have already verified *count. */
 222         if (pcdev->video_limit) {
 223                 size_t size = PAGE_ALIGN(sizes[0]) * *count;
 224
 225                 if (size + pcdev->buf_total > pcdev->video_limit)
 226                         *count = (pcdev->video_limit - pcdev->buf_total) /
 227                                 PAGE_ALIGN(sizes[0]);
 228         }
 229
 230         *num_planes = 1;
 231
 232         dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
 233
 234         return 0;
 235 }
 236
 237 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
 238 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
 239 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
 240 #define CEU_CEIER_VBP   (1 << 20) /* vbp error */
 241 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
 242 #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
 243
 244
 245 /*
 246  * return value doesn't reflex the success/failure to queue the new buffer,
 247  * but rather the status of the previous buffer.
 248  */
 249 static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
 250 {
 251         struct soc_camera_device *icd = pcdev->ici.icd;
 252         dma_addr_t phys_addr_top, phys_addr_bottom;
 253         unsigned long top1, top2;
 254         unsigned long bottom1, bottom2;
 255         u32 status;
 256         bool planar;
 257         int ret = 0;
 258
 259         /*
 260          * The hardware is _very_ picky about this sequence. Especially
 261          * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
 262          * several not-so-well documented interrupt sources in CETCR.
 263          */
 264         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
 265         status = ceu_read(pcdev, CETCR);
 266         ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
 267         if (!pcdev->frozen)
 268                 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
 269         ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
 270         ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
 271
 272         /*
 273          * When a VBP interrupt occurs, a capture end interrupt does not occur
 274          * and the image of that frame is not captured correctly. So, soft reset
 275          * is needed here.
 276          */
 277         if (status & CEU_CEIER_VBP) {
 278                 sh_mobile_ceu_soft_reset(pcdev);
 279                 ret = -EIO;
 280         }
 281
 282         if (pcdev->frozen) {
 283                 complete(&pcdev->complete);
 284                 return ret;
 285         }
 286
 287         if (!pcdev->active)
 288                 return ret;
 289
 290         if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
 291                 top1    = CDBYR;
 292                 top2    = CDBCR;
 293                 bottom1 = CDAYR;
 294                 bottom2 = CDACR;
 295         } else {
 296                 top1    = CDAYR;
 297                 top2    = CDACR;
 298                 bottom1 = CDBYR;
 299                 bottom2 = CDBCR;
 300         }
 301
 302         phys_addr_top =
 303                 vb2_dma_contig_plane_dma_addr(&pcdev->active->vb2_buf, 0);
 304
 305         switch (icd->current_fmt->host_fmt->fourcc) {
 306         case V4L2_PIX_FMT_NV12:
 307         case V4L2_PIX_FMT_NV21:
 308         case V4L2_PIX_FMT_NV16:
 309         case V4L2_PIX_FMT_NV61:
 310                 planar = true;
 311                 break;
 312         default:
 313                 planar = false;
 314         }
 315
 316         ceu_write(pcdev, top1, phys_addr_top);
 317         if (V4L2_FIELD_NONE != pcdev->field) {
 318                 phys_addr_bottom = phys_addr_top + icd->bytesperline;
 319                 ceu_write(pcdev, bottom1, phys_addr_bottom);
 320         }
 321
 322         if (planar) {
 323                 phys_addr_top += icd->bytesperline * icd->user_height;
 324                 ceu_write(pcdev, top2, phys_addr_top);
 325                 if (V4L2_FIELD_NONE != pcdev->field) {
 326                         phys_addr_bottom = phys_addr_top + icd->bytesperline;
 327                         ceu_write(pcdev, bottom2, phys_addr_bottom);
 328                 }
 329         }
 330
 331         ceu_write(pcdev, CAPSR, 0x1); /* start capture */
 332
 333         return ret;
 334 }
 335
 336 static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb)
 337 {
 338         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 339         struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
 340
 341         /* Added list head initialization on alloc */
 342         WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb);
 343
 344         return 0;
 345 }
 346
 347 static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb)
 348 {
 349         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 350         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 351         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 352         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 353         struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
 354         unsigned long size;
 355
 356         size = icd->sizeimage;
 357
 358         if (vb2_plane_size(vb, 0) < size) {
 359                 dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
 360                         vb->index, vb2_plane_size(vb, 0), size);
 361                 goto error;
 362         }
 363
 364         vb2_set_plane_payload(vb, 0, size);
 365
 366         dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
 367                 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
 368
 369 #ifdef DEBUG
 370         /*
 371          * This can be useful if you want to see if we actually fill
 372          * the buffer with something
 373          */
 374         if (vb2_plane_vaddr(vb, 0))
 375                 memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
 376 #endif
 377
 378         spin_lock_irq(&pcdev->lock);
 379         list_add_tail(&buf->queue, &pcdev->capture);
 380
 381         if (!pcdev->active) {
 382                 /*
 383                  * Because there were no active buffer at this moment,
 384                  * we are not interested in the return value of
 385                  * sh_mobile_ceu_capture here.
 386                  */
 387                 pcdev->active = vbuf;
 388                 sh_mobile_ceu_capture(pcdev);
 389         }
 390         spin_unlock_irq(&pcdev->lock);
 391
 392         return;
 393
 394 error:
 395         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 396 }
 397
 398 static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb)
 399 {
 400         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 401         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 402         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 403         struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
 404         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 405
 406         spin_lock_irq(&pcdev->lock);
 407
 408         if (pcdev->active == vbuf) {
 409                 /* disable capture (release DMA buffer), reset */
 410                 ceu_write(pcdev, CAPSR, 1 << 16);
 411                 pcdev->active = NULL;
 412         }
 413
 414         /*
 415          * Doesn't hurt also if the list is empty, but it hurts, if queuing the
 416          * buffer failed, and .buf_init() hasn't been called
 417          */
 418         if (buf->queue.next)
 419                 list_del_init(&buf->queue);
 420
 421         pcdev->buf_total -= PAGE_ALIGN(vb2_plane_size(vb, 0));
 422         dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
 423                 pcdev->buf_total);
 424
 425         spin_unlock_irq(&pcdev->lock);
 426 }
 427
 428 static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
 429 {
 430         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 431         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 432         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 433         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 434
 435         pcdev->buf_total += PAGE_ALIGN(vb2_plane_size(vb, 0));
 436         dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
 437                 pcdev->buf_total);
 438
 439         /* This is for locking debugging only */
 440         INIT_LIST_HEAD(&to_ceu_vb(vbuf)->queue);
 441         return 0;
 442 }
 443
 444 static void sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
 445 {
 446         struct soc_camera_device *icd = soc_camera_from_vb2q(q);
 447         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 448         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 449         struct list_head *buf_head, *tmp;
 450         struct vb2_v4l2_buffer *vbuf;
 451
 452         spin_lock_irq(&pcdev->lock);
 453
 454         pcdev->active = NULL;
 455
 456         list_for_each_safe(buf_head, tmp, &pcdev->capture) {
 457                 vbuf = &list_entry(buf_head, struct sh_mobile_ceu_buffer,
 458                                    queue)->vb;
 459                 vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
 460                 list_del_init(buf_head);
 461         }
 462
 463         spin_unlock_irq(&pcdev->lock);
 464
 465         sh_mobile_ceu_soft_reset(pcdev);
 466 }
 467
 468 static const struct vb2_ops sh_mobile_ceu_videobuf_ops = {
 469         .queue_setup    = sh_mobile_ceu_videobuf_setup,
 470         .buf_prepare    = sh_mobile_ceu_videobuf_prepare,
 471         .buf_queue      = sh_mobile_ceu_videobuf_queue,
 472         .buf_cleanup    = sh_mobile_ceu_videobuf_release,
 473         .buf_init       = sh_mobile_ceu_videobuf_init,
 474         .wait_prepare   = vb2_ops_wait_prepare,
 475         .wait_finish    = vb2_ops_wait_finish,
 476         .stop_streaming = sh_mobile_ceu_stop_streaming,
 477 };
 478
 479 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
 480 {
 481         struct sh_mobile_ceu_dev *pcdev = data;
 482         struct vb2_v4l2_buffer *vbuf;
 483         int ret;
 484
 485         spin_lock(&pcdev->lock);
 486
 487         vbuf = pcdev->active;
 488         if (!vbuf)
 489                 /* Stale interrupt from a released buffer */
 490                 goto out;
 491
 492         list_del_init(&to_ceu_vb(vbuf)->queue);
 493
 494         if (!list_empty(&pcdev->capture))
 495                 pcdev->active = &list_entry(pcdev->capture.next,
 496                                             struct sh_mobile_ceu_buffer, queue)->vb;
 497         else
 498                 pcdev->active = NULL;
 499
 500         ret = sh_mobile_ceu_capture(pcdev);
 501         vbuf->vb2_buf.timestamp = ktime_get_ns();
 502         if (!ret) {
 503                 vbuf->field = pcdev->field;
 504                 vbuf->sequence = pcdev->sequence++;
 505         }
 506         vb2_buffer_done(&vbuf->vb2_buf,
 507                         ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
 508
 509 out:
 510         spin_unlock(&pcdev->lock);
 511
 512         return IRQ_HANDLED;
 513 }
 514
 515 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
 516 {
 517         dev_info(icd->parent,
 518                  "SuperH Mobile CEU driver attached to camera %d\n",
 519                  icd->devnum);
 520
 521         return 0;
 522 }
 523
 524 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
 525 {
 526         dev_info(icd->parent,
 527                  "SuperH Mobile CEU driver detached from camera %d\n",
 528                  icd->devnum);
 529 }
 530
 531 /* Called with .host_lock held */
 532 static int sh_mobile_ceu_clock_start(struct soc_camera_host *ici)
 533 {
 534         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 535
 536         pm_runtime_get_sync(ici->v4l2_dev.dev);
 537
 538         pcdev->buf_total = 0;
 539
 540         sh_mobile_ceu_soft_reset(pcdev);
 541
 542         return 0;
 543 }
 544
 545 /* Called with .host_lock held */
 546 static void sh_mobile_ceu_clock_stop(struct soc_camera_host *ici)
 547 {
 548         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 549
 550         /* disable capture, disable interrupts */
 551         ceu_write(pcdev, CEIER, 0);
 552         sh_mobile_ceu_soft_reset(pcdev);
 553
 554         /* make sure active buffer is canceled */
 555         spin_lock_irq(&pcdev->lock);
 556         if (pcdev->active) {
 557                 list_del_init(&to_ceu_vb(pcdev->active)->queue);
 558                 vb2_buffer_done(&pcdev->active->vb2_buf, VB2_BUF_STATE_ERROR);
 559                 pcdev->active = NULL;
 560         }
 561         spin_unlock_irq(&pcdev->lock);
 562
 563         pm_runtime_put(ici->v4l2_dev.dev);
 564 }
 565
 566 /*
 567  * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
 568  * in SH7722 Hardware Manual
 569  */
 570 static unsigned int size_dst(unsigned int src, unsigned int scale)
 571 {
 572         unsigned int mant_pre = scale >> 12;
 573         if (!src || !scale)
 574                 return src;
 575         return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
 576                 mant_pre * 4096 / scale + 1;
 577 }
 578
 579 static u16 calc_scale(unsigned int src, unsigned int *dst)
 580 {
 581         u16 scale;
 582
 583         if (src == *dst)
 584                 return 0;
 585
 586         scale = (src * 4096 / *dst) & ~7;
 587
 588         while (scale > 4096 && size_dst(src, scale) < *dst)
 589                 scale -= 8;
 590
 591         *dst = size_dst(src, scale);
 592
 593         return scale;
 594 }
 595
 596 /* rect is guaranteed to not exceed the scaled camera rectangle */
 597 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
 598 {
 599         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 600         struct sh_mobile_ceu_cam *cam = icd->host_priv;
 601         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 602         unsigned int height, width, cdwdr_width, in_width, in_height;
 603         unsigned int left_offset, top_offset;
 604         u32 camor;
 605
 606         dev_geo(icd->parent, "Crop %ux%u@%u:%u\n",
 607                 icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
 608
 609         left_offset     = cam->ceu_left;
 610         top_offset      = cam->ceu_top;
 611
 612         WARN_ON(icd->user_width & 3 || icd->user_height & 3);
 613
 614         width = icd->user_width;
 615
 616         if (pcdev->image_mode) {
 617                 in_width = cam->width;
 618                 if (!pcdev->is_16bit) {
 619                         in_width *= 2;
 620                         left_offset *= 2;
 621                 }
 622         } else {
 623                 unsigned int w_factor;
 624
 625                 switch (icd->current_fmt->host_fmt->packing) {
 626                 case SOC_MBUS_PACKING_2X8_PADHI:
 627                         w_factor = 2;
 628                         break;
 629                 default:
 630                         w_factor = 1;
 631                 }
 632
 633                 in_width = cam->width * w_factor;
 634                 left_offset *= w_factor;
 635         }
 636
 637         cdwdr_width = icd->bytesperline;
 638
 639         height = icd->user_height;
 640         in_height = cam->height;
 641         if (V4L2_FIELD_NONE != pcdev->field) {
 642                 height = (height / 2) & ~3;
 643                 in_height /= 2;
 644                 top_offset /= 2;
 645                 cdwdr_width *= 2;
 646         }
 647
 648         /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
 649         camor = left_offset | (top_offset << 16);
 650
 651         dev_geo(icd->parent,
 652                 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
 653                 (in_height << 16) | in_width, (height << 16) | width,
 654                 cdwdr_width);
 655
 656         ceu_write(pcdev, CAMOR, camor);
 657         ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
 658         /* CFSZR clipping is applied _after_ the scaling filter (CFLCR) */
 659         ceu_write(pcdev, CFSZR, (height << 16) | width);
 660         ceu_write(pcdev, CDWDR, cdwdr_width);
 661 }
 662
 663 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
 664 {
 665         u32 capsr = ceu_read(pcdev, CAPSR);
 666         ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
 667         return capsr;
 668 }
 669
 670 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
 671 {
 672         unsigned long timeout = jiffies + 10 * HZ;
 673
 674         /*
 675          * Wait until the end of the current frame. It can take a long time,
 676          * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
 677          */
 678         while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
 679                 msleep(1);
 680
 681         if (time_after(jiffies, timeout)) {
 682                 dev_err(pcdev->ici.v4l2_dev.dev,
 683                         "Timeout waiting for frame end! Interface problem?\n");
 684                 return;
 685         }
 686
 687         /* Wait until reset clears, this shall not hang... */
 688         while (ceu_read(pcdev, CAPSR) & (1 << 16))
 689                 udelay(10);
 690
 691         /* Anything to restore? */
 692         if (capsr & ~(1 << 16))
 693                 ceu_write(pcdev, CAPSR, capsr);
 694 }
 695
 696 #define CEU_BUS_FLAGS (V4L2_MBUS_MASTER |       \
 697                 V4L2_MBUS_PCLK_SAMPLE_RISING |  \
 698                 V4L2_MBUS_HSYNC_ACTIVE_HIGH |   \
 699                 V4L2_MBUS_HSYNC_ACTIVE_LOW |    \
 700                 V4L2_MBUS_VSYNC_ACTIVE_HIGH |   \
 701                 V4L2_MBUS_VSYNC_ACTIVE_LOW |    \
 702                 V4L2_MBUS_DATA_ACTIVE_HIGH)
 703
 704 /* Capture is not running, no interrupts, no locking needed */
 705 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd)
 706 {
 707         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 708         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 709         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 710         struct sh_mobile_ceu_cam *cam = icd->host_priv;
 711         struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
 712         unsigned long value, common_flags = CEU_BUS_FLAGS;
 713         u32 capsr = capture_save_reset(pcdev);
 714         unsigned int yuv_lineskip;
 715         int ret;
 716
 717         /*
 718          * If the client doesn't implement g_mbus_config, we just use our
 719          * platform data
 720          */
 721         ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
 722         if (!ret) {
 723                 common_flags = soc_mbus_config_compatible(&cfg,
 724                                                           common_flags);
 725                 if (!common_flags)
 726                         return -EINVAL;
 727         } else if (ret != -ENOIOCTLCMD) {
 728                 return ret;
 729         }
 730
 731         /* Make choises, based on platform preferences */
 732         if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
 733             (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
 734                 if (pcdev->flags & SH_CEU_FLAG_HSYNC_LOW)
 735                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
 736                 else
 737                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
 738         }
 739
 740         if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
 741             (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
 742                 if (pcdev->flags & SH_CEU_FLAG_VSYNC_LOW)
 743                         common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
 744                 else
 745                         common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
 746         }
 747
 748         cfg.flags = common_flags;
 749         ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
 750         if (ret < 0 && ret != -ENOIOCTLCMD)
 751                 return ret;
 752
 753         if (icd->current_fmt->host_fmt->bits_per_sample > 8)
 754                 pcdev->is_16bit = 1;
 755         else
 756                 pcdev->is_16bit = 0;
 757
 758         ceu_write(pcdev, CRCNTR, 0);
 759         ceu_write(pcdev, CRCMPR, 0);
 760
 761         value = 0x00000010; /* data fetch by default */
 762         yuv_lineskip = 0x10;
 763
 764         switch (icd->current_fmt->host_fmt->fourcc) {
 765         case V4L2_PIX_FMT_NV12:
 766         case V4L2_PIX_FMT_NV21:
 767                 /* convert 4:2:2 -> 4:2:0 */
 768                 yuv_lineskip = 0; /* skip for NV12/21, no skip for NV16/61 */
 769                 /* fall-through */
 770         case V4L2_PIX_FMT_NV16:
 771         case V4L2_PIX_FMT_NV61:
 772                 switch (cam->code) {
 773                 case MEDIA_BUS_FMT_UYVY8_2X8:
 774                         value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
 775                         break;
 776                 case MEDIA_BUS_FMT_VYUY8_2X8:
 777                         value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
 778                         break;
 779                 case MEDIA_BUS_FMT_YUYV8_2X8:
 780                         value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
 781                         break;
 782                 case MEDIA_BUS_FMT_YVYU8_2X8:
 783                         value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
 784                         break;
 785                 default:
 786                         BUG();
 787                 }
 788         }
 789
 790         if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
 791             icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
 792                 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
 793
 794         value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
 795         value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
 796
 797         if (pcdev->is_16bit)
 798                 value |= 1 << 12;
 799         else if (pcdev->flags & SH_CEU_FLAG_LOWER_8BIT)
 800                 value |= 2 << 12;
 801
 802         ceu_write(pcdev, CAMCR, value);
 803
 804         ceu_write(pcdev, CAPCR, 0x00300000);
 805
 806         switch (pcdev->field) {
 807         case V4L2_FIELD_INTERLACED_TB:
 808                 value = 0x101;
 809                 break;
 810         case V4L2_FIELD_INTERLACED_BT:
 811                 value = 0x102;
 812                 break;
 813         default:
 814                 value = 0;
 815                 break;
 816         }
 817         ceu_write(pcdev, CAIFR, value);
 818
 819         sh_mobile_ceu_set_rect(icd);
 820         mdelay(1);
 821
 822         dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr);
 823         ceu_write(pcdev, CFLCR, pcdev->cflcr);
 824
 825         /*
 826          * A few words about byte order (observed in Big Endian mode)
 827          *
 828          * In data fetch mode bytes are received in chunks of 8 bytes.
 829          * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
 830          *
 831          * The data is however by default written to memory in reverse order:
 832          * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
 833          *
 834          * The lowest three bits of CDOCR allows us to do swapping,
 835          * using 7 we swap the data bytes to match the incoming order:
 836          * D0, D1, D2, D3, D4, D5, D6, D7
 837          */
 838         value = 0x00000007 | yuv_lineskip;
 839
 840         ceu_write(pcdev, CDOCR, value);
 841         ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
 842
 843         capture_restore(pcdev, capsr);
 844
 845         /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
 846         return 0;
 847 }
 848
 849 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
 850                                        unsigned char buswidth)
 851 {
 852         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 853         unsigned long common_flags = CEU_BUS_FLAGS;
 854         struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
 855         int ret;
 856
 857         ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
 858         if (!ret)
 859                 common_flags = soc_mbus_config_compatible(&cfg,
 860                                                           common_flags);
 861         else if (ret != -ENOIOCTLCMD)
 862                 return ret;
 863
 864         if (!common_flags || buswidth > 16)
 865                 return -EINVAL;
 866
 867         return 0;
 868 }
 869
 870 static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
 871         {
 872                 .fourcc                 = V4L2_PIX_FMT_NV12,
 873                 .name                   = "NV12",
 874                 .bits_per_sample        = 8,
 875                 .packing                = SOC_MBUS_PACKING_1_5X8,
 876                 .order                  = SOC_MBUS_ORDER_LE,
 877                 .layout                 = SOC_MBUS_LAYOUT_PLANAR_2Y_C,
 878         }, {
 879                 .fourcc                 = V4L2_PIX_FMT_NV21,
 880                 .name                   = "NV21",
 881                 .bits_per_sample        = 8,
 882                 .packing                = SOC_MBUS_PACKING_1_5X8,
 883                 .order                  = SOC_MBUS_ORDER_LE,
 884                 .layout                 = SOC_MBUS_LAYOUT_PLANAR_2Y_C,
 885         }, {
 886                 .fourcc                 = V4L2_PIX_FMT_NV16,
 887                 .name                   = "NV16",
 888                 .bits_per_sample        = 8,
 889                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
 890                 .order                  = SOC_MBUS_ORDER_LE,
 891                 .layout                 = SOC_MBUS_LAYOUT_PLANAR_Y_C,
 892         }, {
 893                 .fourcc                 = V4L2_PIX_FMT_NV61,
 894                 .name                   = "NV61",
 895                 .bits_per_sample        = 8,
 896                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
 897                 .order                  = SOC_MBUS_ORDER_LE,
 898                 .layout                 = SOC_MBUS_LAYOUT_PLANAR_Y_C,
 899         },
 900 };
 901
 902 /* This will be corrected as we get more formats */
 903 static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
 904 {
 905         return  fmt->packing == SOC_MBUS_PACKING_NONE ||
 906                 (fmt->bits_per_sample == 8 &&
 907                  fmt->packing == SOC_MBUS_PACKING_1_5X8) ||
 908                 (fmt->bits_per_sample == 8 &&
 909                  fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
 910                 (fmt->bits_per_sample > 8 &&
 911                  fmt->packing == SOC_MBUS_PACKING_EXTEND16);
 912 }
 913
 914 static struct soc_camera_device *ctrl_to_icd(struct v4l2_ctrl *ctrl)
 915 {
 916         return container_of(ctrl->handler, struct soc_camera_device,
 917                                                         ctrl_handler);
 918 }
 919
 920 static int sh_mobile_ceu_s_ctrl(struct v4l2_ctrl *ctrl)
 921 {
 922         struct soc_camera_device *icd = ctrl_to_icd(ctrl);
 923         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 924         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 925
 926         switch (ctrl->id) {
 927         case V4L2_CID_SHARPNESS:
 928                 switch (icd->current_fmt->host_fmt->fourcc) {
 929                 case V4L2_PIX_FMT_NV12:
 930                 case V4L2_PIX_FMT_NV21:
 931                 case V4L2_PIX_FMT_NV16:
 932                 case V4L2_PIX_FMT_NV61:
 933                         ceu_write(pcdev, CLFCR, !ctrl->val);
 934                         return 0;
 935                 }
 936                 break;
 937         }
 938
 939         return -EINVAL;
 940 }
 941
 942 static const struct v4l2_ctrl_ops sh_mobile_ceu_ctrl_ops = {
 943         .s_ctrl = sh_mobile_ceu_s_ctrl,
 944 };
 945
 946 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
 947                                      struct soc_camera_format_xlate *xlate)
 948 {
 949         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 950         struct device *dev = icd->parent;
 951         struct soc_camera_host *ici = to_soc_camera_host(dev);
 952         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 953         int ret, k, n;
 954         int formats = 0;
 955         struct sh_mobile_ceu_cam *cam;
 956         struct v4l2_subdev_mbus_code_enum code = {
 957                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 958                 .index = idx,
 959         };
 960         const struct soc_mbus_pixelfmt *fmt;
 961
 962         ret = v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code);
 963         if (ret < 0)
 964                 /* No more formats */
 965                 return 0;
 966
 967         fmt = soc_mbus_get_fmtdesc(code.code);
 968         if (!fmt) {
 969                 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code.code);
 970                 return 0;
 971         }
 972
 973         ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
 974         if (ret < 0)
 975                 return 0;
 976
 977         if (!icd->host_priv) {
 978                 struct v4l2_subdev_format fmt = {
 979                         .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 980                 };
 981                 struct v4l2_mbus_framefmt *mf = &fmt.format;
 982                 struct v4l2_rect rect;
 983                 int shift = 0;
 984
 985                 /* Add our control */
 986                 v4l2_ctrl_new_std(&icd->ctrl_handler, &sh_mobile_ceu_ctrl_ops,
 987                                   V4L2_CID_SHARPNESS, 0, 1, 1, 1);
 988                 if (icd->ctrl_handler.error)
 989                         return icd->ctrl_handler.error;
 990
 991                 /* FIXME: subwindow is lost between close / open */
 992
 993                 /* Cache current client geometry */
 994                 ret = soc_camera_client_g_rect(sd, &rect);
 995                 if (ret < 0)
 996                         return ret;
 997
 998                 /* First time */
 999                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
1000                 if (ret < 0)
1001                         return ret;
1002
1003                 /*
1004                  * All currently existing CEU implementations support 2560x1920
1005                  * or larger frames. If the sensor is proposing too big a frame,
1006                  * don't bother with possibly supportred by the CEU larger
1007                  * sizes, just try VGA multiples. If needed, this can be
1008                  * adjusted in the future.
1009                  */
1010                 while ((mf->width > pcdev->max_width ||
1011                         mf->height > pcdev->max_height) && shift < 4) {
1012                         /* Try 2560x1920, 1280x960, 640x480, 320x240 */
1013                         mf->width       = 2560 >> shift;
1014                         mf->height      = 1920 >> shift;
1015                         ret = v4l2_device_call_until_err(sd->v4l2_dev,
1016                                         soc_camera_grp_id(icd), pad,
1017                                         set_fmt, NULL, &fmt);
1018                         if (ret < 0)
1019                                 return ret;
1020                         shift++;
1021                 }
1022
1023                 if (shift == 4) {
1024                         dev_err(dev, "Failed to configure the client below %ux%x\n",
1025                                 mf->width, mf->height);
1026                         return -EIO;
1027                 }
1028
1029                 dev_geo(dev, "camera fmt %ux%u\n", mf->width, mf->height);
1030
1031                 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
1032                 if (!cam)
1033                         return -ENOMEM;
1034
1035                 /* We are called with current camera crop, initialise subrect with it */
1036                 cam->rect       = rect;
1037                 cam->subrect    = rect;
1038
1039                 cam->width      = mf->width;
1040                 cam->height     = mf->height;
1041
1042                 icd->host_priv = cam;
1043         } else {
1044                 cam = icd->host_priv;
1045         }
1046
1047         /* Beginning of a pass */
1048         if (!idx)
1049                 cam->extra_fmt = NULL;
1050
1051         switch (code.code) {
1052         case MEDIA_BUS_FMT_UYVY8_2X8:
1053         case MEDIA_BUS_FMT_VYUY8_2X8:
1054         case MEDIA_BUS_FMT_YUYV8_2X8:
1055         case MEDIA_BUS_FMT_YVYU8_2X8:
1056                 if (cam->extra_fmt)
1057                         break;
1058
1059                 /*
1060                  * Our case is simple so far: for any of the above four camera
1061                  * formats we add all our four synthesized NV* formats, so,
1062                  * just marking the device with a single flag suffices. If
1063                  * the format generation rules are more complex, you would have
1064                  * to actually hang your already added / counted formats onto
1065                  * the host_priv pointer and check whether the format you're
1066                  * going to add now is already there.
1067                  */
1068                 cam->extra_fmt = sh_mobile_ceu_formats;
1069
1070                 n = ARRAY_SIZE(sh_mobile_ceu_formats);
1071                 formats += n;
1072                 for (k = 0; xlate && k < n; k++) {
1073                         xlate->host_fmt = &sh_mobile_ceu_formats[k];
1074                         xlate->code     = code.code;
1075                         xlate++;
1076                         dev_dbg(dev, "Providing format %s using code %d\n",
1077                                 sh_mobile_ceu_formats[k].name, code.code);
1078                 }
1079                 break;
1080         default:
1081                 if (!sh_mobile_ceu_packing_supported(fmt))
1082                         return 0;
1083         }
1084
1085         /* Generic pass-through */
1086         formats++;
1087         if (xlate) {
1088                 xlate->host_fmt = fmt;
1089                 xlate->code     = code.code;
1090                 xlate++;
1091                 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1092                         fmt->name);
1093         }
1094
1095         return formats;
1096 }
1097
1098 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
1099 {
1100         kfree(icd->host_priv);
1101         icd->host_priv = NULL;
1102 }
1103
1104 #define scale_down(size, scale) soc_camera_shift_scale(size, 12, scale)
1105 #define calc_generic_scale(in, out) soc_camera_calc_scale(in, 12, out)
1106
1107 /*
1108  * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1109  * framerate by always requesting the maximum image from the client. See
1110  * Documentation/media/v4l-drivers/sh_mobile_ceu_camera.rst for a description of
1111  * scaling and cropping algorithms and for the meaning of referenced here steps.
1112  */
1113 static int sh_mobile_ceu_set_selection(struct soc_camera_device *icd,
1114                                        struct v4l2_selection *sel)
1115 {
1116         struct v4l2_rect *rect = &sel->r;
1117         struct device *dev = icd->parent;
1118         struct soc_camera_host *ici = to_soc_camera_host(dev);
1119         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1120         struct v4l2_selection cam_sel;
1121         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1122         struct v4l2_rect *cam_rect = &cam_sel.r;
1123         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1124         struct v4l2_subdev_format fmt = {
1125                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1126         };
1127         struct v4l2_mbus_framefmt *mf = &fmt.format;
1128         unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
1129                 out_width, out_height;
1130         int interm_width, interm_height;
1131         u32 capsr, cflcr;
1132         int ret;
1133
1134         dev_geo(dev, "S_SELECTION(%ux%u@%u:%u)\n", rect->width, rect->height,
1135                 rect->left, rect->top);
1136
1137         /* During camera cropping its output window can change too, stop CEU */
1138         capsr = capture_save_reset(pcdev);
1139         dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1140
1141         /*
1142          * 1. - 2. Apply iterative camera S_SELECTION for new input window, read back
1143          * actual camera rectangle.
1144          */
1145         ret = soc_camera_client_s_selection(sd, sel, &cam_sel,
1146                                        &cam->rect, &cam->subrect);
1147         if (ret < 0)
1148                 return ret;
1149
1150         dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
1151                 cam_rect->width, cam_rect->height,
1152                 cam_rect->left, cam_rect->top);
1153
1154         /* On success cam_crop contains current camera crop */
1155
1156         /* 3. Retrieve camera output window */
1157         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
1158         if (ret < 0)
1159                 return ret;
1160
1161         if (mf->width > pcdev->max_width || mf->height > pcdev->max_height)
1162                 return -EINVAL;
1163
1164         /* 4. Calculate camera scales */
1165         scale_cam_h     = calc_generic_scale(cam_rect->width, mf->width);
1166         scale_cam_v     = calc_generic_scale(cam_rect->height, mf->height);
1167
1168         /* Calculate intermediate window */
1169         interm_width    = scale_down(rect->width, scale_cam_h);
1170         interm_height   = scale_down(rect->height, scale_cam_v);
1171
1172         if (interm_width < icd->user_width) {
1173                 u32 new_scale_h;
1174
1175                 new_scale_h = calc_generic_scale(rect->width, icd->user_width);
1176
1177                 mf->width = scale_down(cam_rect->width, new_scale_h);
1178         }
1179
1180         if (interm_height < icd->user_height) {
1181                 u32 new_scale_v;
1182
1183                 new_scale_v = calc_generic_scale(rect->height, icd->user_height);
1184
1185                 mf->height = scale_down(cam_rect->height, new_scale_v);
1186         }
1187
1188         if (interm_width < icd->user_width || interm_height < icd->user_height) {
1189                 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1190                                         soc_camera_grp_id(icd), pad,
1191                                         set_fmt, NULL, &fmt);
1192                 if (ret < 0)
1193                         return ret;
1194
1195                 dev_geo(dev, "New camera output %ux%u\n", mf->width, mf->height);
1196                 scale_cam_h     = calc_generic_scale(cam_rect->width, mf->width);
1197                 scale_cam_v     = calc_generic_scale(cam_rect->height, mf->height);
1198                 interm_width    = scale_down(rect->width, scale_cam_h);
1199                 interm_height   = scale_down(rect->height, scale_cam_v);
1200         }
1201
1202         /* Cache camera output window */
1203         cam->width      = mf->width;
1204         cam->height     = mf->height;
1205
1206         if (pcdev->image_mode) {
1207                 out_width       = min(interm_width, icd->user_width);
1208                 out_height      = min(interm_height, icd->user_height);
1209         } else {
1210                 out_width       = interm_width;
1211                 out_height      = interm_height;
1212         }
1213
1214         /*
1215          * 5. Calculate CEU scales from camera scales from results of (5) and
1216          *    the user window
1217          */
1218         scale_ceu_h     = calc_scale(interm_width, &out_width);
1219         scale_ceu_v     = calc_scale(interm_height, &out_height);
1220
1221         dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1222
1223         /* Apply CEU scales. */
1224         cflcr = scale_ceu_h | (scale_ceu_v << 16);
1225         if (cflcr != pcdev->cflcr) {
1226                 pcdev->cflcr = cflcr;
1227                 ceu_write(pcdev, CFLCR, cflcr);
1228         }
1229
1230         icd->user_width  = out_width & ~3;
1231         icd->user_height = out_height & ~3;
1232         /* Offsets are applied at the CEU scaling filter input */
1233         cam->ceu_left    = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1;
1234         cam->ceu_top     = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1;
1235
1236         /* 6. Use CEU cropping to crop to the new window. */
1237         sh_mobile_ceu_set_rect(icd);
1238
1239         cam->subrect = *rect;
1240
1241         dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
1242                 icd->user_width, icd->user_height,
1243                 cam->ceu_left, cam->ceu_top);
1244
1245         /* Restore capture. The CE bit can be cleared by the hardware */
1246         if (pcdev->active)
1247                 capsr |= 1;
1248         capture_restore(pcdev, capsr);
1249
1250         /* Even if only camera cropping succeeded */
1251         return ret;
1252 }
1253
1254 static int sh_mobile_ceu_get_selection(struct soc_camera_device *icd,
1255                                        struct v4l2_selection *sel)
1256 {
1257         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1258
1259         sel->r = cam->subrect;
1260
1261         return 0;
1262 }
1263
1264 /* Similar to set_crop multistage iterative algorithm */
1265 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1266                                  struct v4l2_format *f)
1267 {
1268         struct device *dev = icd->parent;
1269         struct soc_camera_host *ici = to_soc_camera_host(dev);
1270         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1271         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1272         struct v4l2_pix_format *pix = &f->fmt.pix;
1273         struct v4l2_mbus_framefmt mf;
1274         __u32 pixfmt = pix->pixelformat;
1275         const struct soc_camera_format_xlate *xlate;
1276         unsigned int ceu_sub_width = pcdev->max_width,
1277                 ceu_sub_height = pcdev->max_height;
1278         u16 scale_v, scale_h;
1279         int ret;
1280         bool image_mode;
1281         enum v4l2_field field;
1282
1283         switch (pix->field) {
1284         default:
1285                 pix->field = V4L2_FIELD_NONE;
1286                 /* fall-through */
1287         case V4L2_FIELD_INTERLACED_TB:
1288         case V4L2_FIELD_INTERLACED_BT:
1289         case V4L2_FIELD_NONE:
1290                 field = pix->field;
1291                 break;
1292         case V4L2_FIELD_INTERLACED:
1293                 field = V4L2_FIELD_INTERLACED_TB;
1294                 break;
1295         }
1296
1297         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1298         if (!xlate) {
1299                 dev_warn(dev, "Format %x not found\n", pixfmt);
1300                 return -EINVAL;
1301         }
1302
1303         /* 1.-4. Calculate desired client output geometry */
1304         soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf, 12);
1305         mf.field        = pix->field;
1306         mf.colorspace   = pix->colorspace;
1307         mf.code         = xlate->code;
1308
1309         switch (pixfmt) {
1310         case V4L2_PIX_FMT_NV12:
1311         case V4L2_PIX_FMT_NV21:
1312         case V4L2_PIX_FMT_NV16:
1313         case V4L2_PIX_FMT_NV61:
1314                 image_mode = true;
1315                 break;
1316         default:
1317                 image_mode = false;
1318         }
1319
1320         dev_geo(dev, "S_FMT(pix=0x%x, fld 0x%x, code 0x%x, %ux%u)\n", pixfmt, mf.field, mf.code,
1321                 pix->width, pix->height);
1322
1323         dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
1324
1325         /* 5. - 9. */
1326         ret = soc_camera_client_scale(icd, &cam->rect, &cam->subrect,
1327                                 &mf, &ceu_sub_width, &ceu_sub_height,
1328                                 image_mode && V4L2_FIELD_NONE == field, 12);
1329
1330         dev_geo(dev, "5-9: client scale return %d\n", ret);
1331
1332         /* Done with the camera. Now see if we can improve the result */
1333
1334         dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
1335                 mf.width, mf.height, pix->width, pix->height);
1336         if (ret < 0)
1337                 return ret;
1338
1339         if (mf.code != xlate->code)
1340                 return -EINVAL;
1341
1342         /* 9. Prepare CEU crop */
1343         cam->width = mf.width;
1344         cam->height = mf.height;
1345
1346         /* 10. Use CEU scaling to scale to the requested user window. */
1347
1348         /* We cannot scale up */
1349         if (pix->width > ceu_sub_width)
1350                 ceu_sub_width = pix->width;
1351
1352         if (pix->height > ceu_sub_height)
1353                 ceu_sub_height = pix->height;
1354
1355         pix->colorspace = mf.colorspace;
1356
1357         if (image_mode) {
1358                 /* Scale pix->{width x height} down to width x height */
1359                 scale_h         = calc_scale(ceu_sub_width, &pix->width);
1360                 scale_v         = calc_scale(ceu_sub_height, &pix->height);
1361         } else {
1362                 pix->width      = ceu_sub_width;
1363                 pix->height     = ceu_sub_height;
1364                 scale_h         = 0;
1365                 scale_v         = 0;
1366         }
1367
1368         pcdev->cflcr = scale_h | (scale_v << 16);
1369
1370         /*
1371          * We have calculated CFLCR, the actual configuration will be performed
1372          * in sh_mobile_ceu_set_bus_param()
1373          */
1374
1375         dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1376                 ceu_sub_width, scale_h, pix->width,
1377                 ceu_sub_height, scale_v, pix->height);
1378
1379         cam->code               = xlate->code;
1380         icd->current_fmt        = xlate;
1381
1382         pcdev->field = field;
1383         pcdev->image_mode = image_mode;
1384
1385         /* CFSZR requirement */
1386         pix->width      &= ~3;
1387         pix->height     &= ~3;
1388
1389         return 0;
1390 }
1391
1392 #define CEU_CHDW_MAX    8188U   /* Maximum line stride */
1393
1394 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1395                                  struct v4l2_format *f)
1396 {
1397         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1398         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1399         const struct soc_camera_format_xlate *xlate;
1400         struct v4l2_pix_format *pix = &f->fmt.pix;
1401         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1402         struct v4l2_subdev_pad_config pad_cfg;
1403         struct v4l2_subdev_format format = {
1404                 .which = V4L2_SUBDEV_FORMAT_TRY,
1405         };
1406         struct v4l2_mbus_framefmt *mf = &format.format;
1407         __u32 pixfmt = pix->pixelformat;
1408         int width, height;
1409         int ret;
1410
1411         dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
1412                  pixfmt, pix->width, pix->height);
1413
1414         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1415         if (!xlate) {
1416                 xlate = icd->current_fmt;
1417                 dev_dbg(icd->parent, "Format %x not found, keeping %x\n",
1418                         pixfmt, xlate->host_fmt->fourcc);
1419                 pixfmt = xlate->host_fmt->fourcc;
1420                 pix->pixelformat = pixfmt;
1421                 pix->colorspace = icd->colorspace;
1422         }
1423
1424         /* FIXME: calculate using depth and bus width */
1425
1426         /* CFSZR requires height and width to be 4-pixel aligned */
1427         v4l_bound_align_image(&pix->width, 2, pcdev->max_width, 2,
1428                               &pix->height, 4, pcdev->max_height, 2, 0);
1429
1430         width = pix->width;
1431         height = pix->height;
1432
1433         /* limit to sensor capabilities */
1434         mf->width       = pix->width;
1435         mf->height      = pix->height;
1436         mf->field       = pix->field;
1437         mf->code        = xlate->code;
1438         mf->colorspace  = pix->colorspace;
1439
1440         ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
1441                                          pad, set_fmt, &pad_cfg, &format);
1442         if (ret < 0)
1443                 return ret;
1444
1445         pix->width      = mf->width;
1446         pix->height     = mf->height;
1447         pix->field      = mf->field;
1448         pix->colorspace = mf->colorspace;
1449
1450         switch (pixfmt) {
1451         case V4L2_PIX_FMT_NV12:
1452         case V4L2_PIX_FMT_NV21:
1453         case V4L2_PIX_FMT_NV16:
1454         case V4L2_PIX_FMT_NV61:
1455                 /* FIXME: check against rect_max after converting soc-camera */
1456                 /* We can scale precisely, need a bigger image from camera */
1457                 if (pix->width < width || pix->height < height) {
1458                         /*
1459                          * We presume, the sensor behaves sanely, i.e., if
1460                          * requested a bigger rectangle, it will not return a
1461                          * smaller one.
1462                          */
1463                         mf->width = pcdev->max_width;
1464                         mf->height = pcdev->max_height;
1465                         ret = v4l2_device_call_until_err(sd->v4l2_dev,
1466                                         soc_camera_grp_id(icd), pad,
1467                                         set_fmt, &pad_cfg, &format);
1468                         if (ret < 0) {
1469                                 /* Shouldn't actually happen... */
1470                                 dev_err(icd->parent,
1471                                         "FIXME: client try_fmt() = %d\n", ret);
1472                                 return ret;
1473                         }
1474                 }
1475                 /* We will scale exactly */
1476                 if (mf->width > width)
1477                         pix->width = width;
1478                 if (mf->height > height)
1479                         pix->height = height;
1480
1481                 pix->bytesperline = max(pix->bytesperline, pix->width);
1482                 pix->bytesperline = min(pix->bytesperline, CEU_CHDW_MAX);
1483                 pix->bytesperline &= ~3;
1484                 break;
1485
1486         default:
1487                 /* Configurable stride isn't supported in pass-through mode. */
1488                 pix->bytesperline  = 0;
1489         }
1490
1491         pix->width      &= ~3;
1492         pix->height     &= ~3;
1493         pix->sizeimage  = 0;
1494
1495         dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
1496                 __func__, ret, pix->pixelformat, pix->width, pix->height);
1497
1498         return ret;
1499 }
1500
1501 static int sh_mobile_ceu_set_liveselection(struct soc_camera_device *icd,
1502                                            struct v4l2_selection *sel)
1503 {
1504         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1505         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1506         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1507         u32 out_width = icd->user_width, out_height = icd->user_height;
1508         int ret;
1509
1510         /* Freeze queue */
1511         pcdev->frozen = 1;
1512         /* Wait for frame */
1513         ret = wait_for_completion_interruptible(&pcdev->complete);
1514         /* Stop the client */
1515         ret = v4l2_subdev_call(sd, video, s_stream, 0);
1516         if (ret < 0)
1517                 dev_warn(icd->parent,
1518                          "Client failed to stop the stream: %d\n", ret);
1519         else
1520                 /* Do the crop, if it fails, there's nothing more we can do */
1521                 sh_mobile_ceu_set_selection(icd, sel);
1522
1523         dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height);
1524
1525         if (icd->user_width != out_width || icd->user_height != out_height) {
1526                 struct v4l2_format f = {
1527                         .type   = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1528                         .fmt.pix        = {
1529                                 .width          = out_width,
1530                                 .height         = out_height,
1531                                 .pixelformat    = icd->current_fmt->host_fmt->fourcc,
1532                                 .field          = pcdev->field,
1533                                 .colorspace     = icd->colorspace,
1534                         },
1535                 };
1536                 ret = sh_mobile_ceu_set_fmt(icd, &f);
1537                 if (!ret && (out_width != f.fmt.pix.width ||
1538                              out_height != f.fmt.pix.height))
1539                         ret = -EINVAL;
1540                 if (!ret) {
1541                         icd->user_width         = out_width & ~3;
1542                         icd->user_height        = out_height & ~3;
1543                         ret = sh_mobile_ceu_set_bus_param(icd);
1544                 }
1545         }
1546
1547         /* Thaw the queue */
1548         pcdev->frozen = 0;
1549         spin_lock_irq(&pcdev->lock);
1550         sh_mobile_ceu_capture(pcdev);
1551         spin_unlock_irq(&pcdev->lock);
1552         /* Start the client */
1553         ret = v4l2_subdev_call(sd, video, s_stream, 1);
1554         return ret;
1555 }
1556
1557 static __poll_t sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1558 {
1559         struct soc_camera_device *icd = file->private_data;
1560
1561         return vb2_poll(&icd->vb2_vidq, file, pt);
1562 }
1563
1564 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1565                                   struct v4l2_capability *cap)
1566 {
1567         strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1568         strlcpy(cap->driver, "sh_mobile_ceu", sizeof(cap->driver));
1569         strlcpy(cap->bus_info, "platform:sh_mobile_ceu", sizeof(cap->bus_info));
1570         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1571         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1572
1573         return 0;
1574 }
1575
1576 static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
1577                                        struct soc_camera_device *icd)
1578 {
1579         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1580
1581         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1582         q->io_modes = VB2_MMAP | VB2_USERPTR;
1583         q->drv_priv = icd;
1584         q->ops = &sh_mobile_ceu_videobuf_ops;
1585         q->mem_ops = &vb2_dma_contig_memops;
1586         q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer);
1587         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1588         q->lock = &ici->host_lock;
1589         q->dev = ici->v4l2_dev.dev;
1590
1591         return vb2_queue_init(q);
1592 }
1593
1594 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
1595         .owner          = THIS_MODULE,
1596         .add            = sh_mobile_ceu_add_device,
1597         .remove         = sh_mobile_ceu_remove_device,
1598         .clock_start    = sh_mobile_ceu_clock_start,
1599         .clock_stop     = sh_mobile_ceu_clock_stop,
1600         .get_formats    = sh_mobile_ceu_get_formats,
1601         .put_formats    = sh_mobile_ceu_put_formats,
1602         .get_selection  = sh_mobile_ceu_get_selection,
1603         .set_selection  = sh_mobile_ceu_set_selection,
1604         .set_liveselection      = sh_mobile_ceu_set_liveselection,
1605         .set_fmt        = sh_mobile_ceu_set_fmt,
1606         .try_fmt        = sh_mobile_ceu_try_fmt,
1607         .poll           = sh_mobile_ceu_poll,
1608         .querycap       = sh_mobile_ceu_querycap,
1609         .set_bus_param  = sh_mobile_ceu_set_bus_param,
1610         .init_videobuf2 = sh_mobile_ceu_init_videobuf,
1611 };
1612
1613 struct bus_wait {
1614         struct notifier_block   notifier;
1615         struct completion       completion;
1616         struct device           *dev;
1617 };
1618
1619 static int bus_notify(struct notifier_block *nb,
1620                       unsigned long action, void *data)
1621 {
1622         struct device *dev = data;
1623         struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
1624
1625         if (wait->dev != dev)
1626                 return NOTIFY_DONE;
1627
1628         switch (action) {
1629         case BUS_NOTIFY_UNBOUND_DRIVER:
1630                 /* Protect from module unloading */
1631                 wait_for_completion(&wait->completion);
1632                 return NOTIFY_OK;
1633         }
1634         return NOTIFY_DONE;
1635 }
1636
1637 static int sh_mobile_ceu_probe(struct platform_device *pdev)
1638 {
1639         struct sh_mobile_ceu_dev *pcdev;
1640         struct resource *res;
1641         void __iomem *base;
1642         unsigned int irq;
1643         int err;
1644         struct bus_wait wait = {
1645                 .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
1646                 .notifier.notifier_call = bus_notify,
1647         };
1648
1649         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1650         irq = platform_get_irq(pdev, 0);
1651         if (!res || (int)irq <= 0) {
1652                 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
1653                 return -ENODEV;
1654         }
1655
1656         pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
1657         if (!pcdev) {
1658                 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1659                 return -ENOMEM;
1660         }
1661
1662         INIT_LIST_HEAD(&pcdev->capture);
1663         spin_lock_init(&pcdev->lock);
1664         init_completion(&pcdev->complete);
1665
1666         pcdev->pdata = pdev->dev.platform_data;
1667         if (!pcdev->pdata && !pdev->dev.of_node) {
1668                 dev_err(&pdev->dev, "CEU platform data not set.\n");
1669                 return -EINVAL;
1670         }
1671
1672         /* TODO: implement per-device bus flags */
1673         if (pcdev->pdata) {
1674                 pcdev->max_width = pcdev->pdata->max_width;
1675                 pcdev->max_height = pcdev->pdata->max_height;
1676                 pcdev->flags = pcdev->pdata->flags;
1677         }
1678         pcdev->field = V4L2_FIELD_NONE;
1679
1680         if (!pcdev->max_width) {
1681                 unsigned int v;
1682                 err = of_property_read_u32(pdev->dev.of_node, "renesas,max-width", &v);
1683                 if (!err)
1684                         pcdev->max_width = v;
1685
1686                 if (!pcdev->max_width)
1687                         pcdev->max_width = 2560;
1688         }
1689         if (!pcdev->max_height) {
1690                 unsigned int v;
1691                 err = of_property_read_u32(pdev->dev.of_node, "renesas,max-height", &v);
1692                 if (!err)
1693                         pcdev->max_height = v;
1694
1695                 if (!pcdev->max_height)
1696                         pcdev->max_height = 1920;
1697         }
1698
1699         base = devm_ioremap_resource(&pdev->dev, res);
1700         if (IS_ERR(base))
1701                 return PTR_ERR(base);
1702
1703         pcdev->irq = irq;
1704         pcdev->base = base;
1705         pcdev->video_limit = 0; /* only enabled if second resource exists */
1706
1707         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1708         if (res) {
1709                 err = dma_declare_coherent_memory(&pdev->dev, res->start,
1710                                                   res->start,
1711                                                   resource_size(res),
1712                                                   DMA_MEMORY_EXCLUSIVE);
1713                 if (err) {
1714                         dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
1715                         return err;
1716                 }
1717
1718                 pcdev->video_limit = resource_size(res);
1719         }
1720
1721         /* request irq */
1722         err = devm_request_irq(&pdev->dev, pcdev->irq, sh_mobile_ceu_irq,
1723                                0, dev_name(&pdev->dev), pcdev);
1724         if (err) {
1725                 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
1726                 goto exit_release_mem;
1727         }
1728
1729         pm_suspend_ignore_children(&pdev->dev, true);
1730         pm_runtime_enable(&pdev->dev);
1731         pm_runtime_resume(&pdev->dev);
1732
1733         pcdev->ici.priv = pcdev;
1734         pcdev->ici.v4l2_dev.dev = &pdev->dev;
1735         pcdev->ici.nr = pdev->id;
1736         pcdev->ici.drv_name = dev_name(&pdev->dev);
1737         pcdev->ici.ops = &sh_mobile_ceu_host_ops;
1738         pcdev->ici.capabilities = SOCAM_HOST_CAP_STRIDE;
1739
1740         if (pcdev->pdata && pcdev->pdata->asd_sizes) {
1741                 pcdev->ici.asd = pcdev->pdata->asd;
1742                 pcdev->ici.asd_sizes = pcdev->pdata->asd_sizes;
1743         }
1744
1745         err = soc_camera_host_register(&pcdev->ici);
1746         if (err)
1747                 goto exit_free_clk;
1748
1749         return 0;
1750
1751 exit_free_clk:
1752         pm_runtime_disable(&pdev->dev);
1753 exit_release_mem:
1754         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1755                 dma_release_declared_memory(&pdev->dev);
1756         return err;
1757 }
1758
1759 static int sh_mobile_ceu_remove(struct platform_device *pdev)
1760 {
1761         struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1762
1763         soc_camera_host_unregister(soc_host);
1764         pm_runtime_disable(&pdev->dev);
1765         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1766                 dma_release_declared_memory(&pdev->dev);
1767
1768         return 0;
1769 }
1770
1771 static int sh_mobile_ceu_runtime_nop(struct device *dev)
1772 {
1773         /* Runtime PM callback shared between ->runtime_suspend()
1774          * and ->runtime_resume(). Simply returns success.
1775          *
1776          * This driver re-initializes all registers after
1777          * pm_runtime_get_sync() anyway so there is no need
1778          * to save and restore registers here.
1779          */
1780         return 0;
1781 }
1782
1783 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
1784         .runtime_suspend = sh_mobile_ceu_runtime_nop,
1785         .runtime_resume = sh_mobile_ceu_runtime_nop,
1786 };
1787
1788 static const struct of_device_id sh_mobile_ceu_of_match[] = {
1789         { .compatible = "renesas,sh-mobile-ceu" },
1790         { }
1791 };
1792 MODULE_DEVICE_TABLE(of, sh_mobile_ceu_of_match);
1793
1794 static struct platform_driver sh_mobile_ceu_driver = {
1795         .driver         = {
1796                 .name   = "sh_mobile_ceu",
1797                 .pm     = &sh_mobile_ceu_dev_pm_ops,
1798                 .of_match_table = sh_mobile_ceu_of_match,
1799         },
1800         .probe          = sh_mobile_ceu_probe,
1801         .remove         = sh_mobile_ceu_remove,
1802 };
1803
1804 module_platform_driver(sh_mobile_ceu_driver);
1805
1806 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
1807 MODULE_AUTHOR("Magnus Damm");
1808 MODULE_LICENSE("GPL");
1809 MODULE_VERSION("0.1.0");
1810 MODULE_ALIAS("platform:sh_mobile_ceu");