drivers/media/platform/soc_camera/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/completion.h>
  21 #include <linux/delay.h>
  22 #include <linux/dma-mapping.h>
  23 #include <linux/err.h>
  24 #include <linux/errno.h>
  25 #include <linux/fs.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/kernel.h>
  28 #include <linux/mm.h>
  29 #include <linux/moduleparam.h>
  30 #include <linux/of.h>
  31 #include <linux/time.h>
  32 #include <linux/slab.h>
  33 #include <linux/device.h>
  34 #include <linux/platform_device.h>
  35 #include <linux/videodev2.h>
  36 #include <linux/pm_runtime.h>
  37 #include <linux/sched.h>
  38
  39 #include <media/v4l2-async.h>
  40 #include <media/v4l2-common.h>
  41 #include <media/v4l2-dev.h>
  42 #include <media/soc_camera.h>
  43 #include <media/drv-intf/sh_mobile_ceu.h>
  44 #include <media/videobuf2-dma-contig.h>
  45 #include <media/v4l2-mediabus.h>
  46 #include <media/drv-intf/soc_mediabus.h>
  47
  48 #include "soc_scale_crop.h"
  49
  50 /* register offsets for sh7722 / sh7723 */
  51
  52 #define CAPSR  0x00 /* Capture start register */
  53 #define CAPCR  0x04 /* Capture control register */
  54 #define CAMCR  0x08 /* Capture interface control register */
  55 #define CMCYR  0x0c /* Capture interface cycle  register */
  56 #define CAMOR  0x10 /* Capture interface offset register */
  57 #define CAPWR  0x14 /* Capture interface width register */
  58 #define CAIFR  0x18 /* Capture interface input format register */
  59 #define CSTCR  0x20 /* Camera strobe control register (<= sh7722) */
  60 #define CSECR  0x24 /* Camera strobe emission count register (<= sh7722) */
  61 #define CRCNTR 0x28 /* CEU register control register */
  62 #define CRCMPR 0x2c /* CEU register forcible control register */
  63 #define CFLCR  0x30 /* Capture filter control register */
  64 #define CFSZR  0x34 /* Capture filter size clip register */
  65 #define CDWDR  0x38 /* Capture destination width register */
  66 #define CDAYR  0x3c /* Capture data address Y register */
  67 #define CDACR  0x40 /* Capture data address C register */
  68 #define CDBYR  0x44 /* Capture data bottom-field address Y register */
  69 #define CDBCR  0x48 /* Capture data bottom-field address C register */
  70 #define CBDSR  0x4c /* Capture bundle destination size register */
  71 #define CFWCR  0x5c /* Firewall operation control register */
  72 #define CLFCR  0x60 /* Capture low-pass filter control register */
  73 #define CDOCR  0x64 /* Capture data output control register */
  74 #define CDDCR  0x68 /* Capture data complexity level register */
  75 #define CDDAR  0x6c /* Capture data complexity level address register */
  76 #define CEIER  0x70 /* Capture event interrupt enable register */
  77 #define CETCR  0x74 /* Capture event flag clear register */
  78 #define CSTSR  0x7c /* Capture status register */
  79 #define CSRTR  0x80 /* Capture software reset register */
  80 #define CDSSR  0x84 /* Capture data size register */
  81 #define CDAYR2 0x90 /* Capture data address Y register 2 */
  82 #define CDACR2 0x94 /* Capture data address C register 2 */
  83 #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
  84 #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
  85
  86 #undef DEBUG_GEOMETRY
  87 #ifdef DEBUG_GEOMETRY
  88 #define dev_geo dev_info
  89 #else
  90 #define dev_geo dev_dbg
  91 #endif
  92
  93 /* per video frame buffer */
  94 struct sh_mobile_ceu_buffer {
  95         struct vb2_v4l2_buffer vb; /* v4l buffer must be first */
  96         struct list_head queue;
  97 };
  98
  99 struct sh_mobile_ceu_dev {
 100         struct soc_camera_host ici;
 101
 102         unsigned int irq;
 103         void __iomem *base;
 104         size_t video_limit;
 105         size_t buf_total;
 106
 107         spinlock_t lock;                /* Protects video buffer lists */
 108         struct list_head capture;
 109         struct vb2_v4l2_buffer *active;
 110
 111         struct sh_mobile_ceu_info *pdata;
 112         struct completion complete;
 113
 114         u32 cflcr;
 115
 116         /* static max sizes either from platform data or default */
 117         int max_width;
 118         int max_height;
 119
 120         enum v4l2_field field;
 121         int sequence;
 122         unsigned long flags;
 123
 124         unsigned int image_mode:1;
 125         unsigned int is_16bit:1;
 126         unsigned int frozen:1;
 127 };
 128
 129 struct sh_mobile_ceu_cam {
 130         /* CEU offsets within the camera output, before the CEU scaler */
 131         unsigned int ceu_left;
 132         unsigned int ceu_top;
 133         /* Client output, as seen by the CEU */
 134         unsigned int width;
 135         unsigned int height;
 136         /*
 137          * User window from S_SELECTION / G_SELECTION, produced by client cropping and
 138          * scaling, CEU scaling and CEU cropping, mapped back onto the client
 139          * input window
 140          */
 141         struct v4l2_rect subrect;
 142         /* Camera cropping rectangle */
 143         struct v4l2_rect rect;
 144         const struct soc_mbus_pixelfmt *extra_fmt;
 145         u32 code;
 146 };
 147
 148 static struct sh_mobile_ceu_buffer *to_ceu_vb(struct vb2_v4l2_buffer *vbuf)
 149 {
 150         return container_of(vbuf, struct sh_mobile_ceu_buffer, vb);
 151 }
 152
 153 static void ceu_write(struct sh_mobile_ceu_dev *priv,
 154                       unsigned long reg_offs, u32 data)
 155 {
 156         iowrite32(data, priv->base + reg_offs);
 157 }
 158
 159 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
 160 {
 161         return ioread32(priv->base + reg_offs);
 162 }
 163
 164 static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
 165 {
 166         int i, success = 0;
 167
 168         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
 169
 170         /* wait CSTSR.CPTON bit */
 171         for (i = 0; i < 1000; i++) {
 172                 if (!(ceu_read(pcdev, CSTSR) & 1)) {
 173                         success++;
 174                         break;
 175                 }
 176                 udelay(1);
 177         }
 178
 179         /* wait CAPSR.CPKIL bit */
 180         for (i = 0; i < 1000; i++) {
 181                 if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
 182                         success++;
 183                         break;
 184                 }
 185                 udelay(1);
 186         }
 187
 188         if (2 != success) {
 189                 dev_warn(pcdev->ici.v4l2_dev.dev, "soft reset time out\n");
 190                 return -EIO;
 191         }
 192
 193         return 0;
 194 }
 195
 196 /*
 197  *  Videobuf operations
 198  */
 199
 200 /*
 201  * .queue_setup() is called to check, whether the driver can accept the
 202  *                requested number of buffers and to fill in plane sizes
 203  *                for the current frame format if required
 204  */
 205 static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
 206                         unsigned int *count, unsigned int *num_planes,
 207                         unsigned int sizes[], struct device *alloc_devs[])
 208 {
 209         struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
 210         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 211         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 212
 213         if (!vq->num_buffers)
 214                 pcdev->sequence = 0;
 215
 216         if (!*count)
 217                 *count = 2;
 218
 219         /* Called from VIDIOC_REQBUFS or in compatibility mode */
 220         if (!*num_planes)
 221                 sizes[0] = icd->sizeimage;
 222         else if (sizes[0] < icd->sizeimage)
 223                 return -EINVAL;
 224
 225         /* If *num_planes != 0, we have already verified *count. */
 226         if (pcdev->video_limit) {
 227                 size_t size = PAGE_ALIGN(sizes[0]) * *count;
 228
 229                 if (size + pcdev->buf_total > pcdev->video_limit)
 230                         *count = (pcdev->video_limit - pcdev->buf_total) /
 231                                 PAGE_ALIGN(sizes[0]);
 232         }
 233
 234         *num_planes = 1;
 235
 236         dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
 237
 238         return 0;
 239 }
 240
 241 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
 242 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
 243 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
 244 #define CEU_CEIER_VBP   (1 << 20) /* vbp error */
 245 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
 246 #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
 247
 248
 249 /*
 250  * return value doesn't reflex the success/failure to queue the new buffer,
 251  * but rather the status of the previous buffer.
 252  */
 253 static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
 254 {
 255         struct soc_camera_device *icd = pcdev->ici.icd;
 256         dma_addr_t phys_addr_top, phys_addr_bottom;
 257         unsigned long top1, top2;
 258         unsigned long bottom1, bottom2;
 259         u32 status;
 260         bool planar;
 261         int ret = 0;
 262
 263         /*
 264          * The hardware is _very_ picky about this sequence. Especially
 265          * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
 266          * several not-so-well documented interrupt sources in CETCR.
 267          */
 268         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
 269         status = ceu_read(pcdev, CETCR);
 270         ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
 271         if (!pcdev->frozen)
 272                 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
 273         ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
 274         ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
 275
 276         /*
 277          * When a VBP interrupt occurs, a capture end interrupt does not occur
 278          * and the image of that frame is not captured correctly. So, soft reset
 279          * is needed here.
 280          */
 281         if (status & CEU_CEIER_VBP) {
 282                 sh_mobile_ceu_soft_reset(pcdev);
 283                 ret = -EIO;
 284         }
 285
 286         if (pcdev->frozen) {
 287                 complete(&pcdev->complete);
 288                 return ret;
 289         }
 290
 291         if (!pcdev->active)
 292                 return ret;
 293
 294         if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
 295                 top1    = CDBYR;
 296                 top2    = CDBCR;
 297                 bottom1 = CDAYR;
 298                 bottom2 = CDACR;
 299         } else {
 300                 top1    = CDAYR;
 301                 top2    = CDACR;
 302                 bottom1 = CDBYR;
 303                 bottom2 = CDBCR;
 304         }
 305
 306         phys_addr_top =
 307                 vb2_dma_contig_plane_dma_addr(&pcdev->active->vb2_buf, 0);
 308
 309         switch (icd->current_fmt->host_fmt->fourcc) {
 310         case V4L2_PIX_FMT_NV12:
 311         case V4L2_PIX_FMT_NV21:
 312         case V4L2_PIX_FMT_NV16:
 313         case V4L2_PIX_FMT_NV61:
 314                 planar = true;
 315                 break;
 316         default:
 317                 planar = false;
 318         }
 319
 320         ceu_write(pcdev, top1, phys_addr_top);
 321         if (V4L2_FIELD_NONE != pcdev->field) {
 322                 phys_addr_bottom = phys_addr_top + icd->bytesperline;
 323                 ceu_write(pcdev, bottom1, phys_addr_bottom);
 324         }
 325
 326         if (planar) {
 327                 phys_addr_top += icd->bytesperline * icd->user_height;
 328                 ceu_write(pcdev, top2, phys_addr_top);
 329                 if (V4L2_FIELD_NONE != pcdev->field) {
 330                         phys_addr_bottom = phys_addr_top + icd->bytesperline;
 331                         ceu_write(pcdev, bottom2, phys_addr_bottom);
 332                 }
 333         }
 334
 335         ceu_write(pcdev, CAPSR, 0x1); /* start capture */
 336
 337         return ret;
 338 }
 339
 340 static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb)
 341 {
 342         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 343         struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
 344
 345         /* Added list head initialization on alloc */
 346         WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb);
 347
 348         return 0;
 349 }
 350
 351 static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb)
 352 {
 353         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 354         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 355         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 356         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 357         struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
 358         unsigned long size;
 359
 360         size = icd->sizeimage;
 361
 362         if (vb2_plane_size(vb, 0) < size) {
 363                 dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
 364                         vb->index, vb2_plane_size(vb, 0), size);
 365                 goto error;
 366         }
 367
 368         vb2_set_plane_payload(vb, 0, size);
 369
 370         dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
 371                 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
 372
 373 #ifdef DEBUG
 374         /*
 375          * This can be useful if you want to see if we actually fill
 376          * the buffer with something
 377          */
 378         if (vb2_plane_vaddr(vb, 0))
 379                 memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
 380 #endif
 381
 382         spin_lock_irq(&pcdev->lock);
 383         list_add_tail(&buf->queue, &pcdev->capture);
 384
 385         if (!pcdev->active) {
 386                 /*
 387                  * Because there were no active buffer at this moment,
 388                  * we are not interested in the return value of
 389                  * sh_mobile_ceu_capture here.
 390                  */
 391                 pcdev->active = vbuf;
 392                 sh_mobile_ceu_capture(pcdev);
 393         }
 394         spin_unlock_irq(&pcdev->lock);
 395
 396         return;
 397
 398 error:
 399         vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
 400 }
 401
 402 static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb)
 403 {
 404         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 405         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 406         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 407         struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
 408         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 409
 410         spin_lock_irq(&pcdev->lock);
 411
 412         if (pcdev->active == vbuf) {
 413                 /* disable capture (release DMA buffer), reset */
 414                 ceu_write(pcdev, CAPSR, 1 << 16);
 415                 pcdev->active = NULL;
 416         }
 417
 418         /*
 419          * Doesn't hurt also if the list is empty, but it hurts, if queuing the
 420          * buffer failed, and .buf_init() hasn't been called
 421          */
 422         if (buf->queue.next)
 423                 list_del_init(&buf->queue);
 424
 425         pcdev->buf_total -= PAGE_ALIGN(vb2_plane_size(vb, 0));
 426         dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
 427                 pcdev->buf_total);
 428
 429         spin_unlock_irq(&pcdev->lock);
 430 }
 431
 432 static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
 433 {
 434         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 435         struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
 436         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 437         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 438
 439         pcdev->buf_total += PAGE_ALIGN(vb2_plane_size(vb, 0));
 440         dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
 441                 pcdev->buf_total);
 442
 443         /* This is for locking debugging only */
 444         INIT_LIST_HEAD(&to_ceu_vb(vbuf)->queue);
 445         return 0;
 446 }
 447
 448 static void sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
 449 {
 450         struct soc_camera_device *icd = soc_camera_from_vb2q(q);
 451         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 452         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 453         struct list_head *buf_head, *tmp;
 454         struct vb2_v4l2_buffer *vbuf;
 455
 456         spin_lock_irq(&pcdev->lock);
 457
 458         pcdev->active = NULL;
 459
 460         list_for_each_safe(buf_head, tmp, &pcdev->capture) {
 461                 vbuf = &list_entry(buf_head, struct sh_mobile_ceu_buffer,
 462                                    queue)->vb;
 463                 vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
 464                 list_del_init(buf_head);
 465         }
 466
 467         spin_unlock_irq(&pcdev->lock);
 468
 469         sh_mobile_ceu_soft_reset(pcdev);
 470 }
 471
 472 static const struct vb2_ops sh_mobile_ceu_videobuf_ops = {
 473         .queue_setup    = sh_mobile_ceu_videobuf_setup,
 474         .buf_prepare    = sh_mobile_ceu_videobuf_prepare,
 475         .buf_queue      = sh_mobile_ceu_videobuf_queue,
 476         .buf_cleanup    = sh_mobile_ceu_videobuf_release,
 477         .buf_init       = sh_mobile_ceu_videobuf_init,
 478         .wait_prepare   = vb2_ops_wait_prepare,
 479         .wait_finish    = vb2_ops_wait_finish,
 480         .stop_streaming = sh_mobile_ceu_stop_streaming,
 481 };
 482
 483 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
 484 {
 485         struct sh_mobile_ceu_dev *pcdev = data;
 486         struct vb2_v4l2_buffer *vbuf;
 487         int ret;
 488
 489         spin_lock(&pcdev->lock);
 490
 491         vbuf = pcdev->active;
 492         if (!vbuf)
 493                 /* Stale interrupt from a released buffer */
 494                 goto out;
 495
 496         list_del_init(&to_ceu_vb(vbuf)->queue);
 497
 498         if (!list_empty(&pcdev->capture))
 499                 pcdev->active = &list_entry(pcdev->capture.next,
 500                                             struct sh_mobile_ceu_buffer, queue)->vb;
 501         else
 502                 pcdev->active = NULL;
 503
 504         ret = sh_mobile_ceu_capture(pcdev);
 505         vbuf->vb2_buf.timestamp = ktime_get_ns();
 506         if (!ret) {
 507                 vbuf->field = pcdev->field;
 508                 vbuf->sequence = pcdev->sequence++;
 509         }
 510         vb2_buffer_done(&vbuf->vb2_buf,
 511                         ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
 512
 513 out:
 514         spin_unlock(&pcdev->lock);
 515
 516         return IRQ_HANDLED;
 517 }
 518
 519 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
 520 {
 521         dev_info(icd->parent,
 522                  "SuperH Mobile CEU driver attached to camera %d\n",
 523                  icd->devnum);
 524
 525         return 0;
 526 }
 527
 528 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
 529 {
 530         dev_info(icd->parent,
 531                  "SuperH Mobile CEU driver detached from camera %d\n",
 532                  icd->devnum);
 533 }
 534
 535 /* Called with .host_lock held */
 536 static int sh_mobile_ceu_clock_start(struct soc_camera_host *ici)
 537 {
 538         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 539
 540         pm_runtime_get_sync(ici->v4l2_dev.dev);
 541
 542         pcdev->buf_total = 0;
 543
 544         sh_mobile_ceu_soft_reset(pcdev);
 545
 546         return 0;
 547 }
 548
 549 /* Called with .host_lock held */
 550 static void sh_mobile_ceu_clock_stop(struct soc_camera_host *ici)
 551 {
 552         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 553
 554         /* disable capture, disable interrupts */
 555         ceu_write(pcdev, CEIER, 0);
 556         sh_mobile_ceu_soft_reset(pcdev);
 557
 558         /* make sure active buffer is canceled */
 559         spin_lock_irq(&pcdev->lock);
 560         if (pcdev->active) {
 561                 list_del_init(&to_ceu_vb(pcdev->active)->queue);
 562                 vb2_buffer_done(&pcdev->active->vb2_buf, VB2_BUF_STATE_ERROR);
 563                 pcdev->active = NULL;
 564         }
 565         spin_unlock_irq(&pcdev->lock);
 566
 567         pm_runtime_put(ici->v4l2_dev.dev);
 568 }
 569
 570 /*
 571  * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
 572  * in SH7722 Hardware Manual
 573  */
 574 static unsigned int size_dst(unsigned int src, unsigned int scale)
 575 {
 576         unsigned int mant_pre = scale >> 12;
 577         if (!src || !scale)
 578                 return src;
 579         return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
 580                 mant_pre * 4096 / scale + 1;
 581 }
 582
 583 static u16 calc_scale(unsigned int src, unsigned int *dst)
 584 {
 585         u16 scale;
 586
 587         if (src == *dst)
 588                 return 0;
 589
 590         scale = (src * 4096 / *dst) & ~7;
 591
 592         while (scale > 4096 && size_dst(src, scale) < *dst)
 593                 scale -= 8;
 594
 595         *dst = size_dst(src, scale);
 596
 597         return scale;
 598 }
 599
 600 /* rect is guaranteed to not exceed the scaled camera rectangle */
 601 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
 602 {
 603         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 604         struct sh_mobile_ceu_cam *cam = icd->host_priv;
 605         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 606         unsigned int height, width, cdwdr_width, in_width, in_height;
 607         unsigned int left_offset, top_offset;
 608         u32 camor;
 609
 610         dev_geo(icd->parent, "Crop %ux%u@%u:%u\n",
 611                 icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
 612
 613         left_offset     = cam->ceu_left;
 614         top_offset      = cam->ceu_top;
 615
 616         WARN_ON(icd->user_width & 3 || icd->user_height & 3);
 617
 618         width = icd->user_width;
 619
 620         if (pcdev->image_mode) {
 621                 in_width = cam->width;
 622                 if (!pcdev->is_16bit) {
 623                         in_width *= 2;
 624                         left_offset *= 2;
 625                 }
 626         } else {
 627                 unsigned int w_factor;
 628
 629                 switch (icd->current_fmt->host_fmt->packing) {
 630                 case SOC_MBUS_PACKING_2X8_PADHI:
 631                         w_factor = 2;
 632                         break;
 633                 default:
 634                         w_factor = 1;
 635                 }
 636
 637                 in_width = cam->width * w_factor;
 638                 left_offset *= w_factor;
 639         }
 640
 641         cdwdr_width = icd->bytesperline;
 642
 643         height = icd->user_height;
 644         in_height = cam->height;
 645         if (V4L2_FIELD_NONE != pcdev->field) {
 646                 height = (height / 2) & ~3;
 647                 in_height /= 2;
 648                 top_offset /= 2;
 649                 cdwdr_width *= 2;
 650         }
 651
 652         /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
 653         camor = left_offset | (top_offset << 16);
 654
 655         dev_geo(icd->parent,
 656                 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
 657                 (in_height << 16) | in_width, (height << 16) | width,
 658                 cdwdr_width);
 659
 660         ceu_write(pcdev, CAMOR, camor);
 661         ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
 662         /* CFSZR clipping is applied _after_ the scaling filter (CFLCR) */
 663         ceu_write(pcdev, CFSZR, (height << 16) | width);
 664         ceu_write(pcdev, CDWDR, cdwdr_width);
 665 }
 666
 667 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
 668 {
 669         u32 capsr = ceu_read(pcdev, CAPSR);
 670         ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
 671         return capsr;
 672 }
 673
 674 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
 675 {
 676         unsigned long timeout = jiffies + 10 * HZ;
 677
 678         /*
 679          * Wait until the end of the current frame. It can take a long time,
 680          * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
 681          */
 682         while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
 683                 msleep(1);
 684
 685         if (time_after(jiffies, timeout)) {
 686                 dev_err(pcdev->ici.v4l2_dev.dev,
 687                         "Timeout waiting for frame end! Interface problem?\n");
 688                 return;
 689         }
 690
 691         /* Wait until reset clears, this shall not hang... */
 692         while (ceu_read(pcdev, CAPSR) & (1 << 16))
 693                 udelay(10);
 694
 695         /* Anything to restore? */
 696         if (capsr & ~(1 << 16))
 697                 ceu_write(pcdev, CAPSR, capsr);
 698 }
 699
 700 #define CEU_BUS_FLAGS (V4L2_MBUS_MASTER |       \
 701                 V4L2_MBUS_PCLK_SAMPLE_RISING |  \
 702                 V4L2_MBUS_HSYNC_ACTIVE_HIGH |   \
 703                 V4L2_MBUS_HSYNC_ACTIVE_LOW |    \
 704                 V4L2_MBUS_VSYNC_ACTIVE_HIGH |   \
 705                 V4L2_MBUS_VSYNC_ACTIVE_LOW |    \
 706                 V4L2_MBUS_DATA_ACTIVE_HIGH)
 707
 708 /* Capture is not running, no interrupts, no locking needed */
 709 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd)
 710 {
 711         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 712         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 713         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 714         struct sh_mobile_ceu_cam *cam = icd->host_priv;
 715         struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
 716         unsigned long value, common_flags = CEU_BUS_FLAGS;
 717         u32 capsr = capture_save_reset(pcdev);
 718         unsigned int yuv_lineskip;
 719         int ret;
 720
 721         /*
 722          * If the client doesn't implement g_mbus_config, we just use our
 723          * platform data
 724          */
 725         ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
 726         if (!ret) {
 727                 common_flags = soc_mbus_config_compatible(&cfg,
 728                                                           common_flags);
 729                 if (!common_flags)
 730                         return -EINVAL;
 731         } else if (ret != -ENOIOCTLCMD) {
 732                 return ret;
 733         }
 734
 735         /* Make choises, based on platform preferences */
 736         if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
 737             (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
 738                 if (pcdev->flags & SH_CEU_FLAG_HSYNC_LOW)
 739                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
 740                 else
 741                         common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
 742         }
 743
 744         if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
 745             (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
 746                 if (pcdev->flags & SH_CEU_FLAG_VSYNC_LOW)
 747                         common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
 748                 else
 749                         common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
 750         }
 751
 752         cfg.flags = common_flags;
 753         ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
 754         if (ret < 0 && ret != -ENOIOCTLCMD)
 755                 return ret;
 756
 757         if (icd->current_fmt->host_fmt->bits_per_sample > 8)
 758                 pcdev->is_16bit = 1;
 759         else
 760                 pcdev->is_16bit = 0;
 761
 762         ceu_write(pcdev, CRCNTR, 0);
 763         ceu_write(pcdev, CRCMPR, 0);
 764
 765         value = 0x00000010; /* data fetch by default */
 766         yuv_lineskip = 0x10;
 767
 768         switch (icd->current_fmt->host_fmt->fourcc) {
 769         case V4L2_PIX_FMT_NV12:
 770         case V4L2_PIX_FMT_NV21:
 771                 /* convert 4:2:2 -> 4:2:0 */
 772                 yuv_lineskip = 0; /* skip for NV12/21, no skip for NV16/61 */
 773                 /* fall-through */
 774         case V4L2_PIX_FMT_NV16:
 775         case V4L2_PIX_FMT_NV61:
 776                 switch (cam->code) {
 777                 case MEDIA_BUS_FMT_UYVY8_2X8:
 778                         value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
 779                         break;
 780                 case MEDIA_BUS_FMT_VYUY8_2X8:
 781                         value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
 782                         break;
 783                 case MEDIA_BUS_FMT_YUYV8_2X8:
 784                         value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
 785                         break;
 786                 case MEDIA_BUS_FMT_YVYU8_2X8:
 787                         value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
 788                         break;
 789                 default:
 790                         BUG();
 791                 }
 792         }
 793
 794         if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
 795             icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
 796                 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
 797
 798         value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
 799         value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
 800
 801         if (pcdev->is_16bit)
 802                 value |= 1 << 12;
 803         else if (pcdev->flags & SH_CEU_FLAG_LOWER_8BIT)
 804                 value |= 2 << 12;
 805
 806         ceu_write(pcdev, CAMCR, value);
 807
 808         ceu_write(pcdev, CAPCR, 0x00300000);
 809
 810         switch (pcdev->field) {
 811         case V4L2_FIELD_INTERLACED_TB:
 812                 value = 0x101;
 813                 break;
 814         case V4L2_FIELD_INTERLACED_BT:
 815                 value = 0x102;
 816                 break;
 817         default:
 818                 value = 0;
 819                 break;
 820         }
 821         ceu_write(pcdev, CAIFR, value);
 822
 823         sh_mobile_ceu_set_rect(icd);
 824         mdelay(1);
 825
 826         dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr);
 827         ceu_write(pcdev, CFLCR, pcdev->cflcr);
 828
 829         /*
 830          * A few words about byte order (observed in Big Endian mode)
 831          *
 832          * In data fetch mode bytes are received in chunks of 8 bytes.
 833          * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
 834          *
 835          * The data is however by default written to memory in reverse order:
 836          * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
 837          *
 838          * The lowest three bits of CDOCR allows us to do swapping,
 839          * using 7 we swap the data bytes to match the incoming order:
 840          * D0, D1, D2, D3, D4, D5, D6, D7
 841          */
 842         value = 0x00000007 | yuv_lineskip;
 843
 844         ceu_write(pcdev, CDOCR, value);
 845         ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
 846
 847         capture_restore(pcdev, capsr);
 848
 849         /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
 850         return 0;
 851 }
 852
 853 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
 854                                        unsigned char buswidth)
 855 {
 856         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 857         unsigned long common_flags = CEU_BUS_FLAGS;
 858         struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
 859         int ret;
 860
 861         ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
 862         if (!ret)
 863                 common_flags = soc_mbus_config_compatible(&cfg,
 864                                                           common_flags);
 865         else if (ret != -ENOIOCTLCMD)
 866                 return ret;
 867
 868         if (!common_flags || buswidth > 16)
 869                 return -EINVAL;
 870
 871         return 0;
 872 }
 873
 874 static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
 875         {
 876                 .fourcc                 = V4L2_PIX_FMT_NV12,
 877                 .name                   = "NV12",
 878                 .bits_per_sample        = 8,
 879                 .packing                = SOC_MBUS_PACKING_1_5X8,
 880                 .order                  = SOC_MBUS_ORDER_LE,
 881                 .layout                 = SOC_MBUS_LAYOUT_PLANAR_2Y_C,
 882         }, {
 883                 .fourcc                 = V4L2_PIX_FMT_NV21,
 884                 .name                   = "NV21",
 885                 .bits_per_sample        = 8,
 886                 .packing                = SOC_MBUS_PACKING_1_5X8,
 887                 .order                  = SOC_MBUS_ORDER_LE,
 888                 .layout                 = SOC_MBUS_LAYOUT_PLANAR_2Y_C,
 889         }, {
 890                 .fourcc                 = V4L2_PIX_FMT_NV16,
 891                 .name                   = "NV16",
 892                 .bits_per_sample        = 8,
 893                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
 894                 .order                  = SOC_MBUS_ORDER_LE,
 895                 .layout                 = SOC_MBUS_LAYOUT_PLANAR_Y_C,
 896         }, {
 897                 .fourcc                 = V4L2_PIX_FMT_NV61,
 898                 .name                   = "NV61",
 899                 .bits_per_sample        = 8,
 900                 .packing                = SOC_MBUS_PACKING_2X8_PADHI,
 901                 .order                  = SOC_MBUS_ORDER_LE,
 902                 .layout                 = SOC_MBUS_LAYOUT_PLANAR_Y_C,
 903         },
 904 };
 905
 906 /* This will be corrected as we get more formats */
 907 static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
 908 {
 909         return  fmt->packing == SOC_MBUS_PACKING_NONE ||
 910                 (fmt->bits_per_sample == 8 &&
 911                  fmt->packing == SOC_MBUS_PACKING_1_5X8) ||
 912                 (fmt->bits_per_sample == 8 &&
 913                  fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
 914                 (fmt->bits_per_sample > 8 &&
 915                  fmt->packing == SOC_MBUS_PACKING_EXTEND16);
 916 }
 917
 918 static struct soc_camera_device *ctrl_to_icd(struct v4l2_ctrl *ctrl)
 919 {
 920         return container_of(ctrl->handler, struct soc_camera_device,
 921                                                         ctrl_handler);
 922 }
 923
 924 static int sh_mobile_ceu_s_ctrl(struct v4l2_ctrl *ctrl)
 925 {
 926         struct soc_camera_device *icd = ctrl_to_icd(ctrl);
 927         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
 928         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 929
 930         switch (ctrl->id) {
 931         case V4L2_CID_SHARPNESS:
 932                 switch (icd->current_fmt->host_fmt->fourcc) {
 933                 case V4L2_PIX_FMT_NV12:
 934                 case V4L2_PIX_FMT_NV21:
 935                 case V4L2_PIX_FMT_NV16:
 936                 case V4L2_PIX_FMT_NV61:
 937                         ceu_write(pcdev, CLFCR, !ctrl->val);
 938                         return 0;
 939                 }
 940                 break;
 941         }
 942
 943         return -EINVAL;
 944 }
 945
 946 static const struct v4l2_ctrl_ops sh_mobile_ceu_ctrl_ops = {
 947         .s_ctrl = sh_mobile_ceu_s_ctrl,
 948 };
 949
 950 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
 951                                      struct soc_camera_format_xlate *xlate)
 952 {
 953         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 954         struct device *dev = icd->parent;
 955         struct soc_camera_host *ici = to_soc_camera_host(dev);
 956         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 957         int ret, k, n;
 958         int formats = 0;
 959         struct sh_mobile_ceu_cam *cam;
 960         struct v4l2_subdev_mbus_code_enum code = {
 961                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 962                 .index = idx,
 963         };
 964         const struct soc_mbus_pixelfmt *fmt;
 965
 966         ret = v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code);
 967         if (ret < 0)
 968                 /* No more formats */
 969                 return 0;
 970
 971         fmt = soc_mbus_get_fmtdesc(code.code);
 972         if (!fmt) {
 973                 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code.code);
 974                 return 0;
 975         }
 976
 977         ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
 978         if (ret < 0)
 979                 return 0;
 980
 981         if (!icd->host_priv) {
 982                 struct v4l2_subdev_format fmt = {
 983                         .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 984                 };
 985                 struct v4l2_mbus_framefmt *mf = &fmt.format;
 986                 struct v4l2_rect rect;
 987                 int shift = 0;
 988
 989                 /* Add our control */
 990                 v4l2_ctrl_new_std(&icd->ctrl_handler, &sh_mobile_ceu_ctrl_ops,
 991                                   V4L2_CID_SHARPNESS, 0, 1, 1, 1);
 992                 if (icd->ctrl_handler.error)
 993                         return icd->ctrl_handler.error;
 994
 995                 /* FIXME: subwindow is lost between close / open */
 996
 997                 /* Cache current client geometry */
 998                 ret = soc_camera_client_g_rect(sd, &rect);
 999                 if (ret < 0)
1000                         return ret;
1001
1002                 /* First time */
1003                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
1004                 if (ret < 0)
1005                         return ret;
1006
1007                 /*
1008                  * All currently existing CEU implementations support 2560x1920
1009                  * or larger frames. If the sensor is proposing too big a frame,
1010                  * don't bother with possibly supportred by the CEU larger
1011                  * sizes, just try VGA multiples. If needed, this can be
1012                  * adjusted in the future.
1013                  */
1014                 while ((mf->width > pcdev->max_width ||
1015                         mf->height > pcdev->max_height) && shift < 4) {
1016                         /* Try 2560x1920, 1280x960, 640x480, 320x240 */
1017                         mf->width       = 2560 >> shift;
1018                         mf->height      = 1920 >> shift;
1019                         ret = v4l2_device_call_until_err(sd->v4l2_dev,
1020                                         soc_camera_grp_id(icd), pad,
1021                                         set_fmt, NULL, &fmt);
1022                         if (ret < 0)
1023                                 return ret;
1024                         shift++;
1025                 }
1026
1027                 if (shift == 4) {
1028                         dev_err(dev, "Failed to configure the client below %ux%x\n",
1029                                 mf->width, mf->height);
1030                         return -EIO;
1031                 }
1032
1033                 dev_geo(dev, "camera fmt %ux%u\n", mf->width, mf->height);
1034
1035                 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
1036                 if (!cam)
1037                         return -ENOMEM;
1038
1039                 /* We are called with current camera crop, initialise subrect with it */
1040                 cam->rect       = rect;
1041                 cam->subrect    = rect;
1042
1043                 cam->width      = mf->width;
1044                 cam->height     = mf->height;
1045
1046                 icd->host_priv = cam;
1047         } else {
1048                 cam = icd->host_priv;
1049         }
1050
1051         /* Beginning of a pass */
1052         if (!idx)
1053                 cam->extra_fmt = NULL;
1054
1055         switch (code.code) {
1056         case MEDIA_BUS_FMT_UYVY8_2X8:
1057         case MEDIA_BUS_FMT_VYUY8_2X8:
1058         case MEDIA_BUS_FMT_YUYV8_2X8:
1059         case MEDIA_BUS_FMT_YVYU8_2X8:
1060                 if (cam->extra_fmt)
1061                         break;
1062
1063                 /*
1064                  * Our case is simple so far: for any of the above four camera
1065                  * formats we add all our four synthesized NV* formats, so,
1066                  * just marking the device with a single flag suffices. If
1067                  * the format generation rules are more complex, you would have
1068                  * to actually hang your already added / counted formats onto
1069                  * the host_priv pointer and check whether the format you're
1070                  * going to add now is already there.
1071                  */
1072                 cam->extra_fmt = sh_mobile_ceu_formats;
1073
1074                 n = ARRAY_SIZE(sh_mobile_ceu_formats);
1075                 formats += n;
1076                 for (k = 0; xlate && k < n; k++) {
1077                         xlate->host_fmt = &sh_mobile_ceu_formats[k];
1078                         xlate->code     = code.code;
1079                         xlate++;
1080                         dev_dbg(dev, "Providing format %s using code %d\n",
1081                                 sh_mobile_ceu_formats[k].name, code.code);
1082                 }
1083                 break;
1084         default:
1085                 if (!sh_mobile_ceu_packing_supported(fmt))
1086                         return 0;
1087         }
1088
1089         /* Generic pass-through */
1090         formats++;
1091         if (xlate) {
1092                 xlate->host_fmt = fmt;
1093                 xlate->code     = code.code;
1094                 xlate++;
1095                 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1096                         fmt->name);
1097         }
1098
1099         return formats;
1100 }
1101
1102 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
1103 {
1104         kfree(icd->host_priv);
1105         icd->host_priv = NULL;
1106 }
1107
1108 #define scale_down(size, scale) soc_camera_shift_scale(size, 12, scale)
1109 #define calc_generic_scale(in, out) soc_camera_calc_scale(in, 12, out)
1110
1111 /*
1112  * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1113  * framerate by always requesting the maximum image from the client. See
1114  * Documentation/media/v4l-drivers/sh_mobile_ceu_camera.rst for a description of
1115  * scaling and cropping algorithms and for the meaning of referenced here steps.
1116  */
1117 static int sh_mobile_ceu_set_selection(struct soc_camera_device *icd,
1118                                        struct v4l2_selection *sel)
1119 {
1120         struct v4l2_rect *rect = &sel->r;
1121         struct device *dev = icd->parent;
1122         struct soc_camera_host *ici = to_soc_camera_host(dev);
1123         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1124         struct v4l2_selection cam_sel;
1125         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1126         struct v4l2_rect *cam_rect = &cam_sel.r;
1127         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1128         struct v4l2_subdev_format fmt = {
1129                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1130         };
1131         struct v4l2_mbus_framefmt *mf = &fmt.format;
1132         unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
1133                 out_width, out_height;
1134         int interm_width, interm_height;
1135         u32 capsr, cflcr;
1136         int ret;
1137
1138         dev_geo(dev, "S_SELECTION(%ux%u@%u:%u)\n", rect->width, rect->height,
1139                 rect->left, rect->top);
1140
1141         /* During camera cropping its output window can change too, stop CEU */
1142         capsr = capture_save_reset(pcdev);
1143         dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1144
1145         /*
1146          * 1. - 2. Apply iterative camera S_SELECTION for new input window, read back
1147          * actual camera rectangle.
1148          */
1149         ret = soc_camera_client_s_selection(sd, sel, &cam_sel,
1150                                        &cam->rect, &cam->subrect);
1151         if (ret < 0)
1152                 return ret;
1153
1154         dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
1155                 cam_rect->width, cam_rect->height,
1156                 cam_rect->left, cam_rect->top);
1157
1158         /* On success cam_crop contains current camera crop */
1159
1160         /* 3. Retrieve camera output window */
1161         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
1162         if (ret < 0)
1163                 return ret;
1164
1165         if (mf->width > pcdev->max_width || mf->height > pcdev->max_height)
1166                 return -EINVAL;
1167
1168         /* 4. Calculate camera scales */
1169         scale_cam_h     = calc_generic_scale(cam_rect->width, mf->width);
1170         scale_cam_v     = calc_generic_scale(cam_rect->height, mf->height);
1171
1172         /* Calculate intermediate window */
1173         interm_width    = scale_down(rect->width, scale_cam_h);
1174         interm_height   = scale_down(rect->height, scale_cam_v);
1175
1176         if (interm_width < icd->user_width) {
1177                 u32 new_scale_h;
1178
1179                 new_scale_h = calc_generic_scale(rect->width, icd->user_width);
1180
1181                 mf->width = scale_down(cam_rect->width, new_scale_h);
1182         }
1183
1184         if (interm_height < icd->user_height) {
1185                 u32 new_scale_v;
1186
1187                 new_scale_v = calc_generic_scale(rect->height, icd->user_height);
1188
1189                 mf->height = scale_down(cam_rect->height, new_scale_v);
1190         }
1191
1192         if (interm_width < icd->user_width || interm_height < icd->user_height) {
1193                 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1194                                         soc_camera_grp_id(icd), pad,
1195                                         set_fmt, NULL, &fmt);
1196                 if (ret < 0)
1197                         return ret;
1198
1199                 dev_geo(dev, "New camera output %ux%u\n", mf->width, mf->height);
1200                 scale_cam_h     = calc_generic_scale(cam_rect->width, mf->width);
1201                 scale_cam_v     = calc_generic_scale(cam_rect->height, mf->height);
1202                 interm_width    = scale_down(rect->width, scale_cam_h);
1203                 interm_height   = scale_down(rect->height, scale_cam_v);
1204         }
1205
1206         /* Cache camera output window */
1207         cam->width      = mf->width;
1208         cam->height     = mf->height;
1209
1210         if (pcdev->image_mode) {
1211                 out_width       = min(interm_width, icd->user_width);
1212                 out_height      = min(interm_height, icd->user_height);
1213         } else {
1214                 out_width       = interm_width;
1215                 out_height      = interm_height;
1216         }
1217
1218         /*
1219          * 5. Calculate CEU scales from camera scales from results of (5) and
1220          *    the user window
1221          */
1222         scale_ceu_h     = calc_scale(interm_width, &out_width);
1223         scale_ceu_v     = calc_scale(interm_height, &out_height);
1224
1225         dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1226
1227         /* Apply CEU scales. */
1228         cflcr = scale_ceu_h | (scale_ceu_v << 16);
1229         if (cflcr != pcdev->cflcr) {
1230                 pcdev->cflcr = cflcr;
1231                 ceu_write(pcdev, CFLCR, cflcr);
1232         }
1233
1234         icd->user_width  = out_width & ~3;
1235         icd->user_height = out_height & ~3;
1236         /* Offsets are applied at the CEU scaling filter input */
1237         cam->ceu_left    = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1;
1238         cam->ceu_top     = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1;
1239
1240         /* 6. Use CEU cropping to crop to the new window. */
1241         sh_mobile_ceu_set_rect(icd);
1242
1243         cam->subrect = *rect;
1244
1245         dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
1246                 icd->user_width, icd->user_height,
1247                 cam->ceu_left, cam->ceu_top);
1248
1249         /* Restore capture. The CE bit can be cleared by the hardware */
1250         if (pcdev->active)
1251                 capsr |= 1;
1252         capture_restore(pcdev, capsr);
1253
1254         /* Even if only camera cropping succeeded */
1255         return ret;
1256 }
1257
1258 static int sh_mobile_ceu_get_selection(struct soc_camera_device *icd,
1259                                        struct v4l2_selection *sel)
1260 {
1261         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1262
1263         sel->r = cam->subrect;
1264
1265         return 0;
1266 }
1267
1268 /* Similar to set_crop multistage iterative algorithm */
1269 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1270                                  struct v4l2_format *f)
1271 {
1272         struct device *dev = icd->parent;
1273         struct soc_camera_host *ici = to_soc_camera_host(dev);
1274         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1275         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1276         struct v4l2_pix_format *pix = &f->fmt.pix;
1277         struct v4l2_mbus_framefmt mf;
1278         __u32 pixfmt = pix->pixelformat;
1279         const struct soc_camera_format_xlate *xlate;
1280         unsigned int ceu_sub_width = pcdev->max_width,
1281                 ceu_sub_height = pcdev->max_height;
1282         u16 scale_v, scale_h;
1283         int ret;
1284         bool image_mode;
1285         enum v4l2_field field;
1286
1287         switch (pix->field) {
1288         default:
1289                 pix->field = V4L2_FIELD_NONE;
1290                 /* fall-through */
1291         case V4L2_FIELD_INTERLACED_TB:
1292         case V4L2_FIELD_INTERLACED_BT:
1293         case V4L2_FIELD_NONE:
1294                 field = pix->field;
1295                 break;
1296         case V4L2_FIELD_INTERLACED:
1297                 field = V4L2_FIELD_INTERLACED_TB;
1298                 break;
1299         }
1300
1301         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1302         if (!xlate) {
1303                 dev_warn(dev, "Format %x not found\n", pixfmt);
1304                 return -EINVAL;
1305         }
1306
1307         /* 1.-4. Calculate desired client output geometry */
1308         soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf, 12);
1309         mf.field        = pix->field;
1310         mf.colorspace   = pix->colorspace;
1311         mf.code         = xlate->code;
1312
1313         switch (pixfmt) {
1314         case V4L2_PIX_FMT_NV12:
1315         case V4L2_PIX_FMT_NV21:
1316         case V4L2_PIX_FMT_NV16:
1317         case V4L2_PIX_FMT_NV61:
1318                 image_mode = true;
1319                 break;
1320         default:
1321                 image_mode = false;
1322         }
1323
1324         dev_geo(dev, "S_FMT(pix=0x%x, fld 0x%x, code 0x%x, %ux%u)\n", pixfmt, mf.field, mf.code,
1325                 pix->width, pix->height);
1326
1327         dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
1328
1329         /* 5. - 9. */
1330         ret = soc_camera_client_scale(icd, &cam->rect, &cam->subrect,
1331                                 &mf, &ceu_sub_width, &ceu_sub_height,
1332                                 image_mode && V4L2_FIELD_NONE == field, 12);
1333
1334         dev_geo(dev, "5-9: client scale return %d\n", ret);
1335
1336         /* Done with the camera. Now see if we can improve the result */
1337
1338         dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
1339                 mf.width, mf.height, pix->width, pix->height);
1340         if (ret < 0)
1341                 return ret;
1342
1343         if (mf.code != xlate->code)
1344                 return -EINVAL;
1345
1346         /* 9. Prepare CEU crop */
1347         cam->width = mf.width;
1348         cam->height = mf.height;
1349
1350         /* 10. Use CEU scaling to scale to the requested user window. */
1351
1352         /* We cannot scale up */
1353         if (pix->width > ceu_sub_width)
1354                 ceu_sub_width = pix->width;
1355
1356         if (pix->height > ceu_sub_height)
1357                 ceu_sub_height = pix->height;
1358
1359         pix->colorspace = mf.colorspace;
1360
1361         if (image_mode) {
1362                 /* Scale pix->{width x height} down to width x height */
1363                 scale_h         = calc_scale(ceu_sub_width, &pix->width);
1364                 scale_v         = calc_scale(ceu_sub_height, &pix->height);
1365         } else {
1366                 pix->width      = ceu_sub_width;
1367                 pix->height     = ceu_sub_height;
1368                 scale_h         = 0;
1369                 scale_v         = 0;
1370         }
1371
1372         pcdev->cflcr = scale_h | (scale_v << 16);
1373
1374         /*
1375          * We have calculated CFLCR, the actual configuration will be performed
1376          * in sh_mobile_ceu_set_bus_param()
1377          */
1378
1379         dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1380                 ceu_sub_width, scale_h, pix->width,
1381                 ceu_sub_height, scale_v, pix->height);
1382
1383         cam->code               = xlate->code;
1384         icd->current_fmt        = xlate;
1385
1386         pcdev->field = field;
1387         pcdev->image_mode = image_mode;
1388
1389         /* CFSZR requirement */
1390         pix->width      &= ~3;
1391         pix->height     &= ~3;
1392
1393         return 0;
1394 }
1395
1396 #define CEU_CHDW_MAX    8188U   /* Maximum line stride */
1397
1398 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1399                                  struct v4l2_format *f)
1400 {
1401         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1402         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1403         const struct soc_camera_format_xlate *xlate;
1404         struct v4l2_pix_format *pix = &f->fmt.pix;
1405         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1406         struct v4l2_subdev_pad_config pad_cfg;
1407         struct v4l2_subdev_format format = {
1408                 .which = V4L2_SUBDEV_FORMAT_TRY,
1409         };
1410         struct v4l2_mbus_framefmt *mf = &format.format;
1411         __u32 pixfmt = pix->pixelformat;
1412         int width, height;
1413         int ret;
1414
1415         dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
1416                  pixfmt, pix->width, pix->height);
1417
1418         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1419         if (!xlate) {
1420                 xlate = icd->current_fmt;
1421                 dev_dbg(icd->parent, "Format %x not found, keeping %x\n",
1422                         pixfmt, xlate->host_fmt->fourcc);
1423                 pixfmt = xlate->host_fmt->fourcc;
1424                 pix->pixelformat = pixfmt;
1425                 pix->colorspace = icd->colorspace;
1426         }
1427
1428         /* FIXME: calculate using depth and bus width */
1429
1430         /* CFSZR requires height and width to be 4-pixel aligned */
1431         v4l_bound_align_image(&pix->width, 2, pcdev->max_width, 2,
1432                               &pix->height, 4, pcdev->max_height, 2, 0);
1433
1434         width = pix->width;
1435         height = pix->height;
1436
1437         /* limit to sensor capabilities */
1438         mf->width       = pix->width;
1439         mf->height      = pix->height;
1440         mf->field       = pix->field;
1441         mf->code        = xlate->code;
1442         mf->colorspace  = pix->colorspace;
1443
1444         ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
1445                                          pad, set_fmt, &pad_cfg, &format);
1446         if (ret < 0)
1447                 return ret;
1448
1449         pix->width      = mf->width;
1450         pix->height     = mf->height;
1451         pix->field      = mf->field;
1452         pix->colorspace = mf->colorspace;
1453
1454         switch (pixfmt) {
1455         case V4L2_PIX_FMT_NV12:
1456         case V4L2_PIX_FMT_NV21:
1457         case V4L2_PIX_FMT_NV16:
1458         case V4L2_PIX_FMT_NV61:
1459                 /* FIXME: check against rect_max after converting soc-camera */
1460                 /* We can scale precisely, need a bigger image from camera */
1461                 if (pix->width < width || pix->height < height) {
1462                         /*
1463                          * We presume, the sensor behaves sanely, i.e., if
1464                          * requested a bigger rectangle, it will not return a
1465                          * smaller one.
1466                          */
1467                         mf->width = pcdev->max_width;
1468                         mf->height = pcdev->max_height;
1469                         ret = v4l2_device_call_until_err(sd->v4l2_dev,
1470                                         soc_camera_grp_id(icd), pad,
1471                                         set_fmt, &pad_cfg, &format);
1472                         if (ret < 0) {
1473                                 /* Shouldn't actually happen... */
1474                                 dev_err(icd->parent,
1475                                         "FIXME: client try_fmt() = %d\n", ret);
1476                                 return ret;
1477                         }
1478                 }
1479                 /* We will scale exactly */
1480                 if (mf->width > width)
1481                         pix->width = width;
1482                 if (mf->height > height)
1483                         pix->height = height;
1484
1485                 pix->bytesperline = max(pix->bytesperline, pix->width);
1486                 pix->bytesperline = min(pix->bytesperline, CEU_CHDW_MAX);
1487                 pix->bytesperline &= ~3;
1488                 break;
1489
1490         default:
1491                 /* Configurable stride isn't supported in pass-through mode. */
1492                 pix->bytesperline  = 0;
1493         }
1494
1495         pix->width      &= ~3;
1496         pix->height     &= ~3;
1497         pix->sizeimage  = 0;
1498
1499         dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
1500                 __func__, ret, pix->pixelformat, pix->width, pix->height);
1501
1502         return ret;
1503 }
1504
1505 static int sh_mobile_ceu_set_liveselection(struct soc_camera_device *icd,
1506                                            struct v4l2_selection *sel)
1507 {
1508         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1509         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1510         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1511         u32 out_width = icd->user_width, out_height = icd->user_height;
1512         int ret;
1513
1514         /* Freeze queue */
1515         pcdev->frozen = 1;
1516         /* Wait for frame */
1517         ret = wait_for_completion_interruptible(&pcdev->complete);
1518         /* Stop the client */
1519         ret = v4l2_subdev_call(sd, video, s_stream, 0);
1520         if (ret < 0)
1521                 dev_warn(icd->parent,
1522                          "Client failed to stop the stream: %d\n", ret);
1523         else
1524                 /* Do the crop, if it fails, there's nothing more we can do */
1525                 sh_mobile_ceu_set_selection(icd, sel);
1526
1527         dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height);
1528
1529         if (icd->user_width != out_width || icd->user_height != out_height) {
1530                 struct v4l2_format f = {
1531                         .type   = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1532                         .fmt.pix        = {
1533                                 .width          = out_width,
1534                                 .height         = out_height,
1535                                 .pixelformat    = icd->current_fmt->host_fmt->fourcc,
1536                                 .field          = pcdev->field,
1537                                 .colorspace     = icd->colorspace,
1538                         },
1539                 };
1540                 ret = sh_mobile_ceu_set_fmt(icd, &f);
1541                 if (!ret && (out_width != f.fmt.pix.width ||
1542                              out_height != f.fmt.pix.height))
1543                         ret = -EINVAL;
1544                 if (!ret) {
1545                         icd->user_width         = out_width & ~3;
1546                         icd->user_height        = out_height & ~3;
1547                         ret = sh_mobile_ceu_set_bus_param(icd);
1548                 }
1549         }
1550
1551         /* Thaw the queue */
1552         pcdev->frozen = 0;
1553         spin_lock_irq(&pcdev->lock);
1554         sh_mobile_ceu_capture(pcdev);
1555         spin_unlock_irq(&pcdev->lock);
1556         /* Start the client */
1557         ret = v4l2_subdev_call(sd, video, s_stream, 1);
1558         return ret;
1559 }
1560
1561 static __poll_t sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1562 {
1563         struct soc_camera_device *icd = file->private_data;
1564
1565         return vb2_poll(&icd->vb2_vidq, file, pt);
1566 }
1567
1568 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1569                                   struct v4l2_capability *cap)
1570 {
1571         strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1572         strlcpy(cap->driver, "sh_mobile_ceu", sizeof(cap->driver));
1573         strlcpy(cap->bus_info, "platform:sh_mobile_ceu", sizeof(cap->bus_info));
1574         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1575         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1576
1577         return 0;
1578 }
1579
1580 static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
1581                                        struct soc_camera_device *icd)
1582 {
1583         struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1584
1585         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1586         q->io_modes = VB2_MMAP | VB2_USERPTR;
1587         q->drv_priv = icd;
1588         q->ops = &sh_mobile_ceu_videobuf_ops;
1589         q->mem_ops = &vb2_dma_contig_memops;
1590         q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer);
1591         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1592         q->lock = &ici->host_lock;
1593         q->dev = ici->v4l2_dev.dev;
1594
1595         return vb2_queue_init(q);
1596 }
1597
1598 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
1599         .owner          = THIS_MODULE,
1600         .add            = sh_mobile_ceu_add_device,
1601         .remove         = sh_mobile_ceu_remove_device,
1602         .clock_start    = sh_mobile_ceu_clock_start,
1603         .clock_stop     = sh_mobile_ceu_clock_stop,
1604         .get_formats    = sh_mobile_ceu_get_formats,
1605         .put_formats    = sh_mobile_ceu_put_formats,
1606         .get_selection  = sh_mobile_ceu_get_selection,
1607         .set_selection  = sh_mobile_ceu_set_selection,
1608         .set_liveselection      = sh_mobile_ceu_set_liveselection,
1609         .set_fmt        = sh_mobile_ceu_set_fmt,
1610         .try_fmt        = sh_mobile_ceu_try_fmt,
1611         .poll           = sh_mobile_ceu_poll,
1612         .querycap       = sh_mobile_ceu_querycap,
1613         .set_bus_param  = sh_mobile_ceu_set_bus_param,
1614         .init_videobuf2 = sh_mobile_ceu_init_videobuf,
1615 };
1616
1617 struct bus_wait {
1618         struct notifier_block   notifier;
1619         struct completion       completion;
1620         struct device           *dev;
1621 };
1622
1623 static int bus_notify(struct notifier_block *nb,
1624                       unsigned long action, void *data)
1625 {
1626         struct device *dev = data;
1627         struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
1628
1629         if (wait->dev != dev)
1630                 return NOTIFY_DONE;
1631
1632         switch (action) {
1633         case BUS_NOTIFY_UNBOUND_DRIVER:
1634                 /* Protect from module unloading */
1635                 wait_for_completion(&wait->completion);
1636                 return NOTIFY_OK;
1637         }
1638         return NOTIFY_DONE;
1639 }
1640
1641 static int sh_mobile_ceu_probe(struct platform_device *pdev)
1642 {
1643         struct sh_mobile_ceu_dev *pcdev;
1644         struct resource *res;
1645         void __iomem *base;
1646         unsigned int irq;
1647         int err;
1648         struct bus_wait wait = {
1649                 .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
1650                 .notifier.notifier_call = bus_notify,
1651         };
1652
1653         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1654         irq = platform_get_irq(pdev, 0);
1655         if (!res || (int)irq <= 0) {
1656                 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
1657                 return -ENODEV;
1658         }
1659
1660         pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
1661         if (!pcdev) {
1662                 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1663                 return -ENOMEM;
1664         }
1665
1666         INIT_LIST_HEAD(&pcdev->capture);
1667         spin_lock_init(&pcdev->lock);
1668         init_completion(&pcdev->complete);
1669
1670         pcdev->pdata = pdev->dev.platform_data;
1671         if (!pcdev->pdata && !pdev->dev.of_node) {
1672                 dev_err(&pdev->dev, "CEU platform data not set.\n");
1673                 return -EINVAL;
1674         }
1675
1676         /* TODO: implement per-device bus flags */
1677         if (pcdev->pdata) {
1678                 pcdev->max_width = pcdev->pdata->max_width;
1679                 pcdev->max_height = pcdev->pdata->max_height;
1680                 pcdev->flags = pcdev->pdata->flags;
1681         }
1682         pcdev->field = V4L2_FIELD_NONE;
1683
1684         if (!pcdev->max_width) {
1685                 unsigned int v;
1686                 err = of_property_read_u32(pdev->dev.of_node, "renesas,max-width", &v);
1687                 if (!err)
1688                         pcdev->max_width = v;
1689
1690                 if (!pcdev->max_width)
1691                         pcdev->max_width = 2560;
1692         }
1693         if (!pcdev->max_height) {
1694                 unsigned int v;
1695                 err = of_property_read_u32(pdev->dev.of_node, "renesas,max-height", &v);
1696                 if (!err)
1697                         pcdev->max_height = v;
1698
1699                 if (!pcdev->max_height)
1700                         pcdev->max_height = 1920;
1701         }
1702
1703         base = devm_ioremap_resource(&pdev->dev, res);
1704         if (IS_ERR(base))
1705                 return PTR_ERR(base);
1706
1707         pcdev->irq = irq;
1708         pcdev->base = base;
1709         pcdev->video_limit = 0; /* only enabled if second resource exists */
1710
1711         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1712         if (res) {
1713                 err = dma_declare_coherent_memory(&pdev->dev, res->start,
1714                                                   res->start,
1715                                                   resource_size(res),
1716                                                   DMA_MEMORY_EXCLUSIVE);
1717                 if (err) {
1718                         dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
1719                         return err;
1720                 }
1721
1722                 pcdev->video_limit = resource_size(res);
1723         }
1724
1725         /* request irq */
1726         err = devm_request_irq(&pdev->dev, pcdev->irq, sh_mobile_ceu_irq,
1727                                0, dev_name(&pdev->dev), pcdev);
1728         if (err) {
1729                 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
1730                 goto exit_release_mem;
1731         }
1732
1733         pm_suspend_ignore_children(&pdev->dev, true);
1734         pm_runtime_enable(&pdev->dev);
1735         pm_runtime_resume(&pdev->dev);
1736
1737         pcdev->ici.priv = pcdev;
1738         pcdev->ici.v4l2_dev.dev = &pdev->dev;
1739         pcdev->ici.nr = pdev->id;
1740         pcdev->ici.drv_name = dev_name(&pdev->dev);
1741         pcdev->ici.ops = &sh_mobile_ceu_host_ops;
1742         pcdev->ici.capabilities = SOCAM_HOST_CAP_STRIDE;
1743
1744         if (pcdev->pdata && pcdev->pdata->asd_sizes) {
1745                 pcdev->ici.asd = pcdev->pdata->asd;
1746                 pcdev->ici.asd_sizes = pcdev->pdata->asd_sizes;
1747         }
1748
1749         err = soc_camera_host_register(&pcdev->ici);
1750         if (err)
1751                 goto exit_free_clk;
1752
1753         return 0;
1754
1755 exit_free_clk:
1756         pm_runtime_disable(&pdev->dev);
1757 exit_release_mem:
1758         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1759                 dma_release_declared_memory(&pdev->dev);
1760         return err;
1761 }
1762
1763 static int sh_mobile_ceu_remove(struct platform_device *pdev)
1764 {
1765         struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1766
1767         soc_camera_host_unregister(soc_host);
1768         pm_runtime_disable(&pdev->dev);
1769         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1770                 dma_release_declared_memory(&pdev->dev);
1771
1772         return 0;
1773 }
1774
1775 static int sh_mobile_ceu_runtime_nop(struct device *dev)
1776 {
1777         /* Runtime PM callback shared between ->runtime_suspend()
1778          * and ->runtime_resume(). Simply returns success.
1779          *
1780          * This driver re-initializes all registers after
1781          * pm_runtime_get_sync() anyway so there is no need
1782          * to save and restore registers here.
1783          */
1784         return 0;
1785 }
1786
1787 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
1788         .runtime_suspend = sh_mobile_ceu_runtime_nop,
1789         .runtime_resume = sh_mobile_ceu_runtime_nop,
1790 };
1791
1792 static const struct of_device_id sh_mobile_ceu_of_match[] = {
1793         { .compatible = "renesas,sh-mobile-ceu" },
1794         { }
1795 };
1796 MODULE_DEVICE_TABLE(of, sh_mobile_ceu_of_match);
1797
1798 static struct platform_driver sh_mobile_ceu_driver = {
1799         .driver         = {
1800                 .name   = "sh_mobile_ceu",
1801                 .pm     = &sh_mobile_ceu_dev_pm_ops,
1802                 .of_match_table = sh_mobile_ceu_of_match,
1803         },
1804         .probe          = sh_mobile_ceu_probe,
1805         .remove         = sh_mobile_ceu_remove,
1806 };
1807
1808 module_platform_driver(sh_mobile_ceu_driver);
1809
1810 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
1811 MODULE_AUTHOR("Magnus Damm");
1812 MODULE_LICENSE("GPL");
1813 MODULE_VERSION("0.1.0");
1814 MODULE_ALIAS("platform:sh_mobile_ceu");