SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/media/video/sh_mobile_ceu_camera.c

   1 /*
   2  * V4L2 Driver for SuperH Mobile CEU interface
   3  *
   4  * Copyright (C) 2008 Magnus Damm
   5  *
   6  * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
   7  *
   8  * Copyright (C) 2006, Sascha Hauer, Pengutronix
   9  * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  */
  16
  17 #include <linux/init.h>
  18 #include <linux/module.h>
  19 #include <linux/io.h>
  20 #include <linux/delay.h>
  21 #include <linux/dma-mapping.h>
  22 #include <linux/errno.h>
  23 #include <linux/fs.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/kernel.h>
  26 #include <linux/mm.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/time.h>
  29 #include <linux/version.h>
  30 #include <linux/slab.h>
  31 #include <linux/device.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/videodev2.h>
  34 #include <linux/pm_runtime.h>
  35 #include <linux/sched.h>
  36
  37 #include <media/v4l2-common.h>
  38 #include <media/v4l2-dev.h>
  39 #include <media/soc_camera.h>
  40 #include <media/sh_mobile_ceu.h>
  41 #include <media/videobuf-dma-contig.h>
  42 #include <media/v4l2-mediabus.h>
  43 #include <media/soc_mediabus.h>
  44
  45 /* register offsets for sh7722 / sh7723 */
  46
  47 #define CAPSR  0x00 /* Capture start register */
  48 #define CAPCR  0x04 /* Capture control register */
  49 #define CAMCR  0x08 /* Capture interface control register */
  50 #define CMCYR  0x0c /* Capture interface cycle  register */
  51 #define CAMOR  0x10 /* Capture interface offset register */
  52 #define CAPWR  0x14 /* Capture interface width register */
  53 #define CAIFR  0x18 /* Capture interface input format register */
  54 #define CSTCR  0x20 /* Camera strobe control register (<= sh7722) */
  55 #define CSECR  0x24 /* Camera strobe emission count register (<= sh7722) */
  56 #define CRCNTR 0x28 /* CEU register control register */
  57 #define CRCMPR 0x2c /* CEU register forcible control register */
  58 #define CFLCR  0x30 /* Capture filter control register */
  59 #define CFSZR  0x34 /* Capture filter size clip register */
  60 #define CDWDR  0x38 /* Capture destination width register */
  61 #define CDAYR  0x3c /* Capture data address Y register */
  62 #define CDACR  0x40 /* Capture data address C register */
  63 #define CDBYR  0x44 /* Capture data bottom-field address Y register */
  64 #define CDBCR  0x48 /* Capture data bottom-field address C register */
  65 #define CBDSR  0x4c /* Capture bundle destination size register */
  66 #define CFWCR  0x5c /* Firewall operation control register */
  67 #define CLFCR  0x60 /* Capture low-pass filter control register */
  68 #define CDOCR  0x64 /* Capture data output control register */
  69 #define CDDCR  0x68 /* Capture data complexity level register */
  70 #define CDDAR  0x6c /* Capture data complexity level address register */
  71 #define CEIER  0x70 /* Capture event interrupt enable register */
  72 #define CETCR  0x74 /* Capture event flag clear register */
  73 #define CSTSR  0x7c /* Capture status register */
  74 #define CSRTR  0x80 /* Capture software reset register */
  75 #define CDSSR  0x84 /* Capture data size register */
  76 #define CDAYR2 0x90 /* Capture data address Y register 2 */
  77 #define CDACR2 0x94 /* Capture data address C register 2 */
  78 #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
  79 #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
  80
  81 #undef DEBUG_GEOMETRY
  82 #ifdef DEBUG_GEOMETRY
  83 #define dev_geo dev_info
  84 #else
  85 #define dev_geo dev_dbg
  86 #endif
  87
  88 /* per video frame buffer */
  89 struct sh_mobile_ceu_buffer {
  90         struct videobuf_buffer vb; /* v4l buffer must be first */
  91         enum v4l2_mbus_pixelcode code;
  92 };
  93
  94 struct sh_mobile_ceu_dev {
  95         struct soc_camera_host ici;
  96         struct soc_camera_device *icd;
  97
  98         unsigned int irq;
  99         void __iomem *base;
 100         unsigned long video_limit;
 101
 102         /* lock used to protect videobuf */
 103         spinlock_t lock;
 104         struct list_head capture;
 105         struct videobuf_buffer *active;
 106
 107         struct sh_mobile_ceu_info *pdata;
 108
 109         u32 cflcr;
 110
 111         enum v4l2_field field;
 112
 113         unsigned int image_mode:1;
 114         unsigned int is_16bit:1;
 115 };
 116
 117 struct sh_mobile_ceu_cam {
 118         /* CEU offsets within scaled by the CEU camera output */
 119         unsigned int ceu_left;
 120         unsigned int ceu_top;
 121         /* Client output, as seen by the CEU */
 122         unsigned int width;
 123         unsigned int height;
 124         /*
 125          * User window from S_CROP / G_CROP, produced by client cropping and
 126          * scaling, CEU scaling and CEU cropping, mapped back onto the client
 127          * input window
 128          */
 129         struct v4l2_rect subrect;
 130         /* Camera cropping rectangle */
 131         struct v4l2_rect rect;
 132         const struct soc_mbus_pixelfmt *extra_fmt;
 133         enum v4l2_mbus_pixelcode code;
 134 };
 135
 136 static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
 137 {
 138         unsigned long flags;
 139
 140         flags = SOCAM_MASTER |
 141                 SOCAM_PCLK_SAMPLE_RISING |
 142                 SOCAM_HSYNC_ACTIVE_HIGH |
 143                 SOCAM_HSYNC_ACTIVE_LOW |
 144                 SOCAM_VSYNC_ACTIVE_HIGH |
 145                 SOCAM_VSYNC_ACTIVE_LOW |
 146                 SOCAM_DATA_ACTIVE_HIGH;
 147
 148         if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
 149                 flags |= SOCAM_DATAWIDTH_8;
 150
 151         if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
 152                 flags |= SOCAM_DATAWIDTH_16;
 153
 154         if (flags & SOCAM_DATAWIDTH_MASK)
 155                 return flags;
 156
 157         return 0;
 158 }
 159
 160 static void ceu_write(struct sh_mobile_ceu_dev *priv,
 161                       unsigned long reg_offs, u32 data)
 162 {
 163         iowrite32(data, priv->base + reg_offs);
 164 }
 165
 166 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
 167 {
 168         return ioread32(priv->base + reg_offs);
 169 }
 170
 171 static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
 172 {
 173         int i, success = 0;
 174         struct soc_camera_device *icd = pcdev->icd;
 175
 176         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
 177
 178         /* wait CSTSR.CPTON bit */
 179         for (i = 0; i < 1000; i++) {
 180                 if (!(ceu_read(pcdev, CSTSR) & 1)) {
 181                         success++;
 182                         break;
 183                 }
 184                 udelay(1);
 185         }
 186
 187         /* wait CAPSR.CPKIL bit */
 188         for (i = 0; i < 1000; i++) {
 189                 if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
 190                         success++;
 191                         break;
 192                 }
 193                 udelay(1);
 194         }
 195
 196
 197         if (2 != success) {
 198                 dev_warn(&icd->dev, "soft reset time out\n");
 199                 return -EIO;
 200         }
 201
 202         return 0;
 203 }
 204
 205 /*
 206  *  Videobuf operations
 207  */
 208 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
 209                                         unsigned int *count,
 210                                         unsigned int *size)
 211 {
 212         struct soc_camera_device *icd = vq->priv_data;
 213         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 214         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 215         int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
 216                                                 icd->current_fmt->host_fmt);
 217
 218         if (bytes_per_line < 0)
 219                 return bytes_per_line;
 220
 221         *size = bytes_per_line * icd->user_height;
 222
 223         if (0 == *count)
 224                 *count = 2;
 225
 226         if (pcdev->video_limit) {
 227                 if (PAGE_ALIGN(*size) * *count > pcdev->video_limit)
 228                         *count = pcdev->video_limit / PAGE_ALIGN(*size);
 229         }
 230
 231         dev_dbg(icd->dev.parent, "count=%d, size=%d\n", *count, *size);
 232
 233         return 0;
 234 }
 235
 236 static void free_buffer(struct videobuf_queue *vq,
 237                         struct sh_mobile_ceu_buffer *buf)
 238 {
 239         struct soc_camera_device *icd = vq->priv_data;
 240         struct device *dev = icd->dev.parent;
 241
 242         dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 243                 &buf->vb, buf->vb.baddr, buf->vb.bsize);
 244
 245         if (in_interrupt())
 246                 BUG();
 247
 248         videobuf_waiton(&buf->vb, 0, 0);
 249         videobuf_dma_contig_free(vq, &buf->vb);
 250         dev_dbg(dev, "%s freed\n", __func__);
 251         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 252 }
 253
 254 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
 255 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
 256 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
 257 #define CEU_CEIER_VBP   (1 << 20) /* vbp error */
 258 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
 259 #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
 260
 261
 262 /*
 263  * return value doesn't reflex the success/failure to queue the new buffer,
 264  * but rather the status of the previous buffer.
 265  */
 266 static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
 267 {
 268         struct soc_camera_device *icd = pcdev->icd;
 269         dma_addr_t phys_addr_top, phys_addr_bottom;
 270         unsigned long top1, top2;
 271         unsigned long bottom1, bottom2;
 272         u32 status;
 273         int ret = 0;
 274
 275         /*
 276          * The hardware is _very_ picky about this sequence. Especially
 277          * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
 278          * several not-so-well documented interrupt sources in CETCR.
 279          */
 280         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
 281         status = ceu_read(pcdev, CETCR);
 282         ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
 283         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
 284         ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
 285         ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
 286
 287         /*
 288          * When a VBP interrupt occurs, a capture end interrupt does not occur
 289          * and the image of that frame is not captured correctly. So, soft reset
 290          * is needed here.
 291          */
 292         if (status & CEU_CEIER_VBP) {
 293                 sh_mobile_ceu_soft_reset(pcdev);
 294                 ret = -EIO;
 295         }
 296
 297         if (!pcdev->active)
 298                 return ret;
 299
 300         if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
 301                 top1    = CDBYR;
 302                 top2    = CDBCR;
 303                 bottom1 = CDAYR;
 304                 bottom2 = CDACR;
 305         } else {
 306                 top1    = CDAYR;
 307                 top2    = CDACR;
 308                 bottom1 = CDBYR;
 309                 bottom2 = CDBCR;
 310         }
 311
 312         phys_addr_top = videobuf_to_dma_contig(pcdev->active);
 313         ceu_write(pcdev, top1, phys_addr_top);
 314         if (V4L2_FIELD_NONE != pcdev->field) {
 315                 phys_addr_bottom = phys_addr_top + icd->user_width;
 316                 ceu_write(pcdev, bottom1, phys_addr_bottom);
 317         }
 318
 319         switch (icd->current_fmt->host_fmt->fourcc) {
 320         case V4L2_PIX_FMT_NV12:
 321         case V4L2_PIX_FMT_NV21:
 322         case V4L2_PIX_FMT_NV16:
 323         case V4L2_PIX_FMT_NV61:
 324                 phys_addr_top += icd->user_width *
 325                         icd->user_height;
 326                 ceu_write(pcdev, top2, phys_addr_top);
 327                 if (V4L2_FIELD_NONE != pcdev->field) {
 328                         phys_addr_bottom = phys_addr_top + icd->user_width;
 329                         ceu_write(pcdev, bottom2, phys_addr_bottom);
 330                 }
 331         }
 332
 333         pcdev->active->state = VIDEOBUF_ACTIVE;
 334         ceu_write(pcdev, CAPSR, 0x1); /* start capture */
 335
 336         return ret;
 337 }
 338
 339 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
 340                                           struct videobuf_buffer *vb,
 341                                           enum v4l2_field field)
 342 {
 343         struct soc_camera_device *icd = vq->priv_data;
 344         struct sh_mobile_ceu_buffer *buf;
 345         int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
 346                                                 icd->current_fmt->host_fmt);
 347         int ret;
 348
 349         if (bytes_per_line < 0)
 350                 return bytes_per_line;
 351
 352         buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
 353
 354         dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 355                 vb, vb->baddr, vb->bsize);
 356
 357         /* Added list head initialization on alloc */
 358         WARN_ON(!list_empty(&vb->queue));
 359
 360 #ifdef DEBUG
 361         /*
 362          * This can be useful if you want to see if we actually fill
 363          * the buffer with something
 364          */
 365         memset((void *)vb->baddr, 0xaa, vb->bsize);
 366 #endif
 367
 368         BUG_ON(NULL == icd->current_fmt);
 369
 370         if (buf->code   != icd->current_fmt->code ||
 371             vb->width   != icd->user_width ||
 372             vb->height  != icd->user_height ||
 373             vb->field   != field) {
 374                 buf->code       = icd->current_fmt->code;
 375                 vb->width       = icd->user_width;
 376                 vb->height      = icd->user_height;
 377                 vb->field       = field;
 378                 vb->state       = VIDEOBUF_NEEDS_INIT;
 379         }
 380
 381         vb->size = vb->height * bytes_per_line;
 382         if (0 != vb->baddr && vb->bsize < vb->size) {
 383                 ret = -EINVAL;
 384                 goto out;
 385         }
 386
 387         if (vb->state == VIDEOBUF_NEEDS_INIT) {
 388                 ret = videobuf_iolock(vq, vb, NULL);
 389                 if (ret)
 390                         goto fail;
 391                 vb->state = VIDEOBUF_PREPARED;
 392         }
 393
 394         return 0;
 395 fail:
 396         free_buffer(vq, buf);
 397 out:
 398         return ret;
 399 }
 400
 401 /* Called under spinlock_irqsave(&pcdev->lock, ...) */
 402 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
 403                                          struct videobuf_buffer *vb)
 404 {
 405         struct soc_camera_device *icd = vq->priv_data;
 406         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 407         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 408
 409         dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 410                 vb, vb->baddr, vb->bsize);
 411
 412         vb->state = VIDEOBUF_QUEUED;
 413         list_add_tail(&vb->queue, &pcdev->capture);
 414
 415         if (!pcdev->active) {
 416                 /*
 417                  * Because there were no active buffer at this moment,
 418                  * we are not interested in the return value of
 419                  * sh_mobile_ceu_capture here.
 420                  */
 421                 pcdev->active = vb;
 422                 sh_mobile_ceu_capture(pcdev);
 423         }
 424 }
 425
 426 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
 427                                            struct videobuf_buffer *vb)
 428 {
 429         struct soc_camera_device *icd = vq->priv_data;
 430         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 431         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 432         unsigned long flags;
 433
 434         spin_lock_irqsave(&pcdev->lock, flags);
 435
 436         if (pcdev->active == vb) {
 437                 /* disable capture (release DMA buffer), reset */
 438                 ceu_write(pcdev, CAPSR, 1 << 16);
 439                 pcdev->active = NULL;
 440         }
 441
 442         if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) &&
 443             !list_empty(&vb->queue)) {
 444                 vb->state = VIDEOBUF_ERROR;
 445                 list_del_init(&vb->queue);
 446         }
 447
 448         spin_unlock_irqrestore(&pcdev->lock, flags);
 449
 450         free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
 451 }
 452
 453 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
 454         .buf_setup      = sh_mobile_ceu_videobuf_setup,
 455         .buf_prepare    = sh_mobile_ceu_videobuf_prepare,
 456         .buf_queue      = sh_mobile_ceu_videobuf_queue,
 457         .buf_release    = sh_mobile_ceu_videobuf_release,
 458 };
 459
 460 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
 461 {
 462         struct sh_mobile_ceu_dev *pcdev = data;
 463         struct videobuf_buffer *vb;
 464         unsigned long flags;
 465
 466         spin_lock_irqsave(&pcdev->lock, flags);
 467
 468         vb = pcdev->active;
 469         if (!vb)
 470                 /* Stale interrupt from a released buffer */
 471                 goto out;
 472
 473         list_del_init(&vb->queue);
 474
 475         if (!list_empty(&pcdev->capture))
 476                 pcdev->active = list_entry(pcdev->capture.next,
 477                                            struct videobuf_buffer, queue);
 478         else
 479                 pcdev->active = NULL;
 480
 481         vb->state = (sh_mobile_ceu_capture(pcdev) < 0) ?
 482                 VIDEOBUF_ERROR : VIDEOBUF_DONE;
 483         do_gettimeofday(&vb->ts);
 484         vb->field_count++;
 485         wake_up(&vb->done);
 486
 487 out:
 488         spin_unlock_irqrestore(&pcdev->lock, flags);
 489
 490         return IRQ_HANDLED;
 491 }
 492
 493 /* Called with .video_lock held */
 494 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
 495 {
 496         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 497         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 498         int ret;
 499
 500         if (pcdev->icd)
 501                 return -EBUSY;
 502
 503         dev_info(icd->dev.parent,
 504                  "SuperH Mobile CEU driver attached to camera %d\n",
 505                  icd->devnum);
 506
 507         pm_runtime_get_sync(ici->v4l2_dev.dev);
 508
 509         ret = sh_mobile_ceu_soft_reset(pcdev);
 510         if (!ret)
 511                 pcdev->icd = icd;
 512
 513         return ret;
 514 }
 515
 516 /* Called with .video_lock held */
 517 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
 518 {
 519         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 520         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 521         unsigned long flags;
 522
 523         BUG_ON(icd != pcdev->icd);
 524
 525         /* disable capture, disable interrupts */
 526         ceu_write(pcdev, CEIER, 0);
 527         sh_mobile_ceu_soft_reset(pcdev);
 528
 529         /* make sure active buffer is canceled */
 530         spin_lock_irqsave(&pcdev->lock, flags);
 531         if (pcdev->active) {
 532                 list_del(&pcdev->active->queue);
 533                 pcdev->active->state = VIDEOBUF_ERROR;
 534                 wake_up_all(&pcdev->active->done);
 535                 pcdev->active = NULL;
 536         }
 537         spin_unlock_irqrestore(&pcdev->lock, flags);
 538
 539         pm_runtime_put_sync(ici->v4l2_dev.dev);
 540
 541         dev_info(icd->dev.parent,
 542                  "SuperH Mobile CEU driver detached from camera %d\n",
 543                  icd->devnum);
 544
 545         pcdev->icd = NULL;
 546 }
 547
 548 /*
 549  * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
 550  * in SH7722 Hardware Manual
 551  */
 552 static unsigned int size_dst(unsigned int src, unsigned int scale)
 553 {
 554         unsigned int mant_pre = scale >> 12;
 555         if (!src || !scale)
 556                 return src;
 557         return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
 558                 mant_pre * 4096 / scale + 1;
 559 }
 560
 561 static u16 calc_scale(unsigned int src, unsigned int *dst)
 562 {
 563         u16 scale;
 564
 565         if (src == *dst)
 566                 return 0;
 567
 568         scale = (src * 4096 / *dst) & ~7;
 569
 570         while (scale > 4096 && size_dst(src, scale) < *dst)
 571                 scale -= 8;
 572
 573         *dst = size_dst(src, scale);
 574
 575         return scale;
 576 }
 577
 578 /* rect is guaranteed to not exceed the scaled camera rectangle */
 579 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
 580 {
 581         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 582         struct sh_mobile_ceu_cam *cam = icd->host_priv;
 583         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 584         unsigned int height, width, cdwdr_width, in_width, in_height;
 585         unsigned int left_offset, top_offset;
 586         u32 camor;
 587
 588         dev_geo(icd->dev.parent, "Crop %ux%u@%u:%u\n",
 589                 icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
 590
 591         left_offset     = cam->ceu_left;
 592         top_offset      = cam->ceu_top;
 593
 594         /* CEU cropping (CFSZR) is applied _after_ the scaling filter (CFLCR) */
 595         if (pcdev->image_mode) {
 596                 in_width = cam->width;
 597                 if (!pcdev->is_16bit) {
 598                         in_width *= 2;
 599                         left_offset *= 2;
 600                 }
 601                 width = icd->user_width;
 602                 cdwdr_width = icd->user_width;
 603         } else {
 604                 int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
 605                                                 icd->current_fmt->host_fmt);
 606                 unsigned int w_factor;
 607
 608                 width = icd->user_width;
 609
 610                 switch (icd->current_fmt->host_fmt->packing) {
 611                 case SOC_MBUS_PACKING_2X8_PADHI:
 612                         w_factor = 2;
 613                         break;
 614                 default:
 615                         w_factor = 1;
 616                 }
 617
 618                 in_width = cam->width * w_factor;
 619                 left_offset = left_offset * w_factor;
 620
 621                 if (bytes_per_line < 0)
 622                         cdwdr_width = icd->user_width;
 623                 else
 624                         cdwdr_width = bytes_per_line;
 625         }
 626
 627         height = icd->user_height;
 628         in_height = cam->height;
 629         if (V4L2_FIELD_NONE != pcdev->field) {
 630                 height /= 2;
 631                 in_height /= 2;
 632                 top_offset /= 2;
 633                 cdwdr_width *= 2;
 634         }
 635
 636         /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
 637         camor = left_offset | (top_offset << 16);
 638
 639         dev_geo(icd->dev.parent,
 640                 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
 641                 (in_height << 16) | in_width, (height << 16) | width,
 642                 cdwdr_width);
 643
 644         ceu_write(pcdev, CAMOR, camor);
 645         ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
 646         ceu_write(pcdev, CFSZR, (height << 16) | width);
 647         ceu_write(pcdev, CDWDR, cdwdr_width);
 648 }
 649
 650 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
 651 {
 652         u32 capsr = ceu_read(pcdev, CAPSR);
 653         ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
 654         return capsr;
 655 }
 656
 657 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
 658 {
 659         unsigned long timeout = jiffies + 10 * HZ;
 660
 661         /*
 662          * Wait until the end of the current frame. It can take a long time,
 663          * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
 664          */
 665         while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
 666                 msleep(1);
 667
 668         if (time_after(jiffies, timeout)) {
 669                 dev_err(pcdev->ici.v4l2_dev.dev,
 670                         "Timeout waiting for frame end! Interface problem?\n");
 671                 return;
 672         }
 673
 674         /* Wait until reset clears, this shall not hang... */
 675         while (ceu_read(pcdev, CAPSR) & (1 << 16))
 676                 udelay(10);
 677
 678         /* Anything to restore? */
 679         if (capsr & ~(1 << 16))
 680                 ceu_write(pcdev, CAPSR, capsr);
 681 }
 682
 683 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
 684                                        __u32 pixfmt)
 685 {
 686         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 687         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 688         int ret;
 689         unsigned long camera_flags, common_flags, value;
 690         int yuv_lineskip;
 691         struct sh_mobile_ceu_cam *cam = icd->host_priv;
 692         u32 capsr = capture_save_reset(pcdev);
 693
 694         camera_flags = icd->ops->query_bus_param(icd);
 695         common_flags = soc_camera_bus_param_compatible(camera_flags,
 696                                                        make_bus_param(pcdev));
 697         if (!common_flags)
 698                 return -EINVAL;
 699
 700         /* Make choises, based on platform preferences */
 701         if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) &&
 702             (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) {
 703                 if (pcdev->pdata->flags & SH_CEU_FLAG_HSYNC_LOW)
 704                         common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH;
 705                 else
 706                         common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW;
 707         }
 708
 709         if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) &&
 710             (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) {
 711                 if (pcdev->pdata->flags & SH_CEU_FLAG_VSYNC_LOW)
 712                         common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH;
 713                 else
 714                         common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW;
 715         }
 716
 717         ret = icd->ops->set_bus_param(icd, common_flags);
 718         if (ret < 0)
 719                 return ret;
 720
 721         switch (common_flags & SOCAM_DATAWIDTH_MASK) {
 722         case SOCAM_DATAWIDTH_8:
 723                 pcdev->is_16bit = 0;
 724                 break;
 725         case SOCAM_DATAWIDTH_16:
 726                 pcdev->is_16bit = 1;
 727                 break;
 728         default:
 729                 return -EINVAL;
 730         }
 731
 732         ceu_write(pcdev, CRCNTR, 0);
 733         ceu_write(pcdev, CRCMPR, 0);
 734
 735         value = 0x00000010; /* data fetch by default */
 736         yuv_lineskip = 0;
 737
 738         switch (icd->current_fmt->host_fmt->fourcc) {
 739         case V4L2_PIX_FMT_NV12:
 740         case V4L2_PIX_FMT_NV21:
 741                 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
 742                 /* fall-through */
 743         case V4L2_PIX_FMT_NV16:
 744         case V4L2_PIX_FMT_NV61:
 745                 switch (cam->code) {
 746                 case V4L2_MBUS_FMT_YUYV8_2X8_BE:
 747                         value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
 748                         break;
 749                 case V4L2_MBUS_FMT_YVYU8_2X8_BE:
 750                         value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
 751                         break;
 752                 case V4L2_MBUS_FMT_YUYV8_2X8_LE:
 753                         value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
 754                         break;
 755                 case V4L2_MBUS_FMT_YVYU8_2X8_LE:
 756                         value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
 757                         break;
 758                 default:
 759                         BUG();
 760                 }
 761         }
 762
 763         if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
 764             icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
 765                 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
 766
 767         value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
 768         value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
 769         value |= pcdev->is_16bit ? 1 << 12 : 0;
 770         ceu_write(pcdev, CAMCR, value);
 771
 772         ceu_write(pcdev, CAPCR, 0x00300000);
 773
 774         switch (pcdev->field) {
 775         case V4L2_FIELD_INTERLACED_TB:
 776                 value = 0x101;
 777                 break;
 778         case V4L2_FIELD_INTERLACED_BT:
 779                 value = 0x102;
 780                 break;
 781         default:
 782                 value = 0;
 783                 break;
 784         }
 785         ceu_write(pcdev, CAIFR, value);
 786
 787         sh_mobile_ceu_set_rect(icd);
 788         mdelay(1);
 789
 790         dev_geo(icd->dev.parent, "CFLCR 0x%x\n", pcdev->cflcr);
 791         ceu_write(pcdev, CFLCR, pcdev->cflcr);
 792
 793         /*
 794          * A few words about byte order (observed in Big Endian mode)
 795          *
 796          * In data fetch mode bytes are received in chunks of 8 bytes.
 797          * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
 798          *
 799          * The data is however by default written to memory in reverse order:
 800          * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
 801          *
 802          * The lowest three bits of CDOCR allows us to do swapping,
 803          * using 7 we swap the data bytes to match the incoming order:
 804          * D0, D1, D2, D3, D4, D5, D6, D7
 805          */
 806         value = 0x00000017;
 807         if (yuv_lineskip)
 808                 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
 809
 810         ceu_write(pcdev, CDOCR, value);
 811         ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
 812
 813         dev_dbg(icd->dev.parent, "S_FMT successful for %c%c%c%c %ux%u\n",
 814                 pixfmt & 0xff, (pixfmt >> 8) & 0xff,
 815                 (pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
 816                 icd->user_width, icd->user_height);
 817
 818         capture_restore(pcdev, capsr);
 819
 820         /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
 821         return 0;
 822 }
 823
 824 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
 825                                        unsigned char buswidth)
 826 {
 827         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 828         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 829         unsigned long camera_flags, common_flags;
 830
 831         camera_flags = icd->ops->query_bus_param(icd);
 832         common_flags = soc_camera_bus_param_compatible(camera_flags,
 833                                                        make_bus_param(pcdev));
 834         if (!common_flags || buswidth > 16 ||
 835             (buswidth > 8 && !(common_flags & SOCAM_DATAWIDTH_16)))
 836                 return -EINVAL;
 837
 838         return 0;
 839 }
 840
 841 static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
 842         {
 843                 .fourcc                 = V4L2_PIX_FMT_NV12,
 844                 .name                   = "NV12",
 845                 .bits_per_sample        = 12,
 846                 .packing                = SOC_MBUS_PACKING_NONE,
 847                 .order                  = SOC_MBUS_ORDER_LE,
 848         }, {
 849                 .fourcc                 = V4L2_PIX_FMT_NV21,
 850                 .name                   = "NV21",
 851                 .bits_per_sample        = 12,
 852                 .packing                = SOC_MBUS_PACKING_NONE,
 853                 .order                  = SOC_MBUS_ORDER_LE,
 854         }, {
 855                 .fourcc                 = V4L2_PIX_FMT_NV16,
 856                 .name                   = "NV16",
 857                 .bits_per_sample        = 16,
 858                 .packing                = SOC_MBUS_PACKING_NONE,
 859                 .order                  = SOC_MBUS_ORDER_LE,
 860         }, {
 861                 .fourcc                 = V4L2_PIX_FMT_NV61,
 862                 .name                   = "NV61",
 863                 .bits_per_sample        = 16,
 864                 .packing                = SOC_MBUS_PACKING_NONE,
 865                 .order                  = SOC_MBUS_ORDER_LE,
 866         },
 867 };
 868
 869 /* This will be corrected as we get more formats */
 870 static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
 871 {
 872         return  fmt->packing == SOC_MBUS_PACKING_NONE ||
 873                 (fmt->bits_per_sample == 8 &&
 874                  fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
 875                 (fmt->bits_per_sample > 8 &&
 876                  fmt->packing == SOC_MBUS_PACKING_EXTEND16);
 877 }
 878
 879 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect);
 880
 881 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
 882                                      struct soc_camera_format_xlate *xlate)
 883 {
 884         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 885         struct device *dev = icd->dev.parent;
 886         int ret, k, n;
 887         int formats = 0;
 888         struct sh_mobile_ceu_cam *cam;
 889         enum v4l2_mbus_pixelcode code;
 890         const struct soc_mbus_pixelfmt *fmt;
 891
 892         ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
 893         if (ret < 0)
 894                 /* No more formats */
 895                 return 0;
 896
 897         fmt = soc_mbus_get_fmtdesc(code);
 898         if (!fmt) {
 899                 dev_err(icd->dev.parent,
 900                         "Invalid format code #%u: %d\n", idx, code);
 901                 return -EINVAL;
 902         }
 903
 904         ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
 905         if (ret < 0)
 906                 return 0;
 907
 908         if (!icd->host_priv) {
 909                 struct v4l2_mbus_framefmt mf;
 910                 struct v4l2_rect rect;
 911                 struct device *dev = icd->dev.parent;
 912                 int shift = 0;
 913
 914                 /* FIXME: subwindow is lost between close / open */
 915
 916                 /* Cache current client geometry */
 917                 ret = client_g_rect(sd, &rect);
 918                 if (ret < 0)
 919                         return ret;
 920
 921                 /* First time */
 922                 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
 923                 if (ret < 0)
 924                         return ret;
 925
 926                 while ((mf.width > 2560 || mf.height > 1920) && shift < 4) {
 927                         /* Try 2560x1920, 1280x960, 640x480, 320x240 */
 928                         mf.width        = 2560 >> shift;
 929                         mf.height       = 1920 >> shift;
 930                         ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
 931                         if (ret < 0)
 932                                 return ret;
 933                         shift++;
 934                 }
 935
 936                 if (shift == 4) {
 937                         dev_err(dev, "Failed to configure the client below %ux%x\n",
 938                                 mf.width, mf.height);
 939                         return -EIO;
 940                 }
 941
 942                 dev_geo(dev, "camera fmt %ux%u\n", mf.width, mf.height);
 943
 944                 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
 945                 if (!cam)
 946                         return -ENOMEM;
 947
 948                 /* We are called with current camera crop, initialise subrect with it */
 949                 cam->rect       = rect;
 950                 cam->subrect    = rect;
 951
 952                 cam->width      = mf.width;
 953                 cam->height     = mf.height;
 954
 955                 cam->width      = mf.width;
 956                 cam->height     = mf.height;
 957
 958                 icd->host_priv = cam;
 959         } else {
 960                 cam = icd->host_priv;
 961         }
 962
 963         /* Beginning of a pass */
 964         if (!idx)
 965                 cam->extra_fmt = NULL;
 966
 967         switch (code) {
 968         case V4L2_MBUS_FMT_YUYV8_2X8_BE:
 969         case V4L2_MBUS_FMT_YVYU8_2X8_BE:
 970         case V4L2_MBUS_FMT_YUYV8_2X8_LE:
 971         case V4L2_MBUS_FMT_YVYU8_2X8_LE:
 972                 if (cam->extra_fmt)
 973                         break;
 974
 975                 /*
 976                  * Our case is simple so far: for any of the above four camera
 977                  * formats we add all our four synthesized NV* formats, so,
 978                  * just marking the device with a single flag suffices. If
 979                  * the format generation rules are more complex, you would have
 980                  * to actually hang your already added / counted formats onto
 981                  * the host_priv pointer and check whether the format you're
 982                  * going to add now is already there.
 983                  */
 984                 cam->extra_fmt = sh_mobile_ceu_formats;
 985
 986                 n = ARRAY_SIZE(sh_mobile_ceu_formats);
 987                 formats += n;
 988                 for (k = 0; xlate && k < n; k++) {
 989                         xlate->host_fmt = &sh_mobile_ceu_formats[k];
 990                         xlate->code     = code;
 991                         xlate++;
 992                         dev_dbg(dev, "Providing format %s using code %d\n",
 993                                 sh_mobile_ceu_formats[k].name, code);
 994                 }
 995                 break;
 996         default:
 997                 if (!sh_mobile_ceu_packing_supported(fmt))
 998                         return 0;
 999         }
1000
1001         /* Generic pass-through */
1002         formats++;
1003         if (xlate) {
1004                 xlate->host_fmt = fmt;
1005                 xlate->code     = code;
1006                 xlate++;
1007                 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1008                         xlate->host_fmt->name);
1009         }
1010
1011         return formats;
1012 }
1013
1014 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
1015 {
1016         kfree(icd->host_priv);
1017         icd->host_priv = NULL;
1018 }
1019
1020 /* Check if any dimension of r1 is smaller than respective one of r2 */
1021 static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2)
1022 {
1023         return r1->width < r2->width || r1->height < r2->height;
1024 }
1025
1026 /* Check if r1 fails to cover r2 */
1027 static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2)
1028 {
1029         return r1->left > r2->left || r1->top > r2->top ||
1030                 r1->left + r1->width < r2->left + r2->width ||
1031                 r1->top + r1->height < r2->top + r2->height;
1032 }
1033
1034 static unsigned int scale_down(unsigned int size, unsigned int scale)
1035 {
1036         return (size * 4096 + scale / 2) / scale;
1037 }
1038
1039 static unsigned int calc_generic_scale(unsigned int input, unsigned int output)
1040 {
1041         return (input * 4096 + output / 2) / output;
1042 }
1043
1044 /* Get and store current client crop */
1045 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect)
1046 {
1047         struct v4l2_crop crop;
1048         struct v4l2_cropcap cap;
1049         int ret;
1050
1051         crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1052
1053         ret = v4l2_subdev_call(sd, video, g_crop, &crop);
1054         if (!ret) {
1055                 *rect = crop.c;
1056                 return ret;
1057         }
1058
1059         /* Camera driver doesn't support .g_crop(), assume default rectangle */
1060         cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1061
1062         ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1063         if (!ret)
1064                 *rect = cap.defrect;
1065
1066         return ret;
1067 }
1068
1069 /* Client crop has changed, update our sub-rectangle to remain within the area */
1070 static void update_subrect(struct sh_mobile_ceu_cam *cam)
1071 {
1072         struct v4l2_rect *rect = &cam->rect, *subrect = &cam->subrect;
1073
1074         if (rect->width < subrect->width)
1075                 subrect->width = rect->width;
1076
1077         if (rect->height < subrect->height)
1078                 subrect->height = rect->height;
1079
1080         if (rect->left > subrect->left)
1081                 subrect->left = rect->left;
1082         else if (rect->left + rect->width >
1083                  subrect->left + subrect->width)
1084                 subrect->left = rect->left + rect->width -
1085                         subrect->width;
1086
1087         if (rect->top > subrect->top)
1088                 subrect->top = rect->top;
1089         else if (rect->top + rect->height >
1090                  subrect->top + subrect->height)
1091                 subrect->top = rect->top + rect->height -
1092                         subrect->height;
1093 }
1094
1095 /*
1096  * The common for both scaling and cropping iterative approach is:
1097  * 1. try if the client can produce exactly what requested by the user
1098  * 2. if (1) failed, try to double the client image until we get one big enough
1099  * 3. if (2) failed, try to request the maximum image
1100  */
1101 static int client_s_crop(struct soc_camera_device *icd, struct v4l2_crop *crop,
1102                          struct v4l2_crop *cam_crop)
1103 {
1104         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1105         struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c;
1106         struct device *dev = sd->v4l2_dev->dev;
1107         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1108         struct v4l2_cropcap cap;
1109         int ret;
1110         unsigned int width, height;
1111
1112         v4l2_subdev_call(sd, video, s_crop, crop);
1113         ret = client_g_rect(sd, cam_rect);
1114         if (ret < 0)
1115                 return ret;
1116
1117         /*
1118          * Now cam_crop contains the current camera input rectangle, and it must
1119          * be within camera cropcap bounds
1120          */
1121         if (!memcmp(rect, cam_rect, sizeof(*rect))) {
1122                 /* Even if camera S_CROP failed, but camera rectangle matches */
1123                 dev_dbg(dev, "Camera S_CROP successful for %dx%d@%d:%d\n",
1124                         rect->width, rect->height, rect->left, rect->top);
1125                 cam->rect = *cam_rect;
1126                 return 0;
1127         }
1128
1129         /* Try to fix cropping, that camera hasn't managed to set */
1130         dev_geo(dev, "Fix camera S_CROP for %dx%d@%d:%d to %dx%d@%d:%d\n",
1131                 cam_rect->width, cam_rect->height,
1132                 cam_rect->left, cam_rect->top,
1133                 rect->width, rect->height, rect->left, rect->top);
1134
1135         /* We need sensor maximum rectangle */
1136         ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1137         if (ret < 0)
1138                 return ret;
1139
1140         /* Put user requested rectangle within sensor bounds */
1141         soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2,
1142                               cap.bounds.width);
1143         soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4,
1144                               cap.bounds.height);
1145
1146         /*
1147          * Popular special case - some cameras can only handle fixed sizes like
1148          * QVGA, VGA,... Take care to avoid infinite loop.
1149          */
1150         width = max(cam_rect->width, 2);
1151         height = max(cam_rect->height, 2);
1152
1153         /*
1154          * Loop as long as sensor is not covering the requested rectangle and
1155          * is still within its bounds
1156          */
1157         while (!ret && (is_smaller(cam_rect, rect) ||
1158                         is_inside(cam_rect, rect)) &&
1159                (cap.bounds.width > width || cap.bounds.height > height)) {
1160
1161                 width *= 2;
1162                 height *= 2;
1163
1164                 cam_rect->width = width;
1165                 cam_rect->height = height;
1166
1167                 /*
1168                  * We do not know what capabilities the camera has to set up
1169                  * left and top borders. We could try to be smarter in iterating
1170                  * them, e.g., if camera current left is to the right of the
1171                  * target left, set it to the middle point between the current
1172                  * left and minimum left. But that would add too much
1173                  * complexity: we would have to iterate each border separately.
1174                  * Instead we just drop to the left and top bounds.
1175                  */
1176                 if (cam_rect->left > rect->left)
1177                         cam_rect->left = cap.bounds.left;
1178
1179                 if (cam_rect->left + cam_rect->width < rect->left + rect->width)
1180                         cam_rect->width = rect->left + rect->width -
1181                                 cam_rect->left;
1182
1183                 if (cam_rect->top > rect->top)
1184                         cam_rect->top = cap.bounds.top;
1185
1186                 if (cam_rect->top + cam_rect->height < rect->top + rect->height)
1187                         cam_rect->height = rect->top + rect->height -
1188                                 cam_rect->top;
1189
1190                 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1191                 ret = client_g_rect(sd, cam_rect);
1192                 dev_geo(dev, "Camera S_CROP %d for %dx%d@%d:%d\n", ret,
1193                         cam_rect->width, cam_rect->height,
1194                         cam_rect->left, cam_rect->top);
1195         }
1196
1197         /* S_CROP must not modify the rectangle */
1198         if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) {
1199                 /*
1200                  * The camera failed to configure a suitable cropping,
1201                  * we cannot use the current rectangle, set to max
1202                  */
1203                 *cam_rect = cap.bounds;
1204                 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1205                 ret = client_g_rect(sd, cam_rect);
1206                 dev_geo(dev, "Camera S_CROP %d for max %dx%d@%d:%d\n", ret,
1207                         cam_rect->width, cam_rect->height,
1208                         cam_rect->left, cam_rect->top);
1209         }
1210
1211         if (!ret) {
1212                 cam->rect = *cam_rect;
1213                 update_subrect(cam);
1214         }
1215
1216         return ret;
1217 }
1218
1219 /* Iterative s_mbus_fmt, also updates cached client crop on success */
1220 static int client_s_fmt(struct soc_camera_device *icd,
1221                         struct v4l2_mbus_framefmt *mf, bool ceu_can_scale)
1222 {
1223         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1224         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1225         struct device *dev = icd->dev.parent;
1226         unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h;
1227         unsigned int max_width, max_height;
1228         struct v4l2_cropcap cap;
1229         int ret;
1230
1231         ret = v4l2_subdev_call(sd, video, s_mbus_fmt, mf);
1232         if (ret < 0)
1233                 return ret;
1234
1235         dev_geo(dev, "camera scaled to %ux%u\n", mf->width, mf->height);
1236
1237         if ((width == mf->width && height == mf->height) || !ceu_can_scale)
1238                 goto update_cache;
1239
1240         cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1241
1242         ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1243         if (ret < 0)
1244                 return ret;
1245
1246         max_width = min(cap.bounds.width, 2560);
1247         max_height = min(cap.bounds.height, 1920);
1248
1249         /* Camera set a format, but geometry is not precise, try to improve */
1250         tmp_w = mf->width;
1251         tmp_h = mf->height;
1252
1253         /* width <= max_width && height <= max_height - guaranteed by try_fmt */
1254         while ((width > tmp_w || height > tmp_h) &&
1255                tmp_w < max_width && tmp_h < max_height) {
1256                 tmp_w = min(2 * tmp_w, max_width);
1257                 tmp_h = min(2 * tmp_h, max_height);
1258                 mf->width = tmp_w;
1259                 mf->height = tmp_h;
1260                 ret = v4l2_subdev_call(sd, video, s_mbus_fmt, mf);
1261                 dev_geo(dev, "Camera scaled to %ux%u\n",
1262                         mf->width, mf->height);
1263                 if (ret < 0) {
1264                         /* This shouldn't happen */
1265                         dev_err(dev, "Client failed to set format: %d\n", ret);
1266                         return ret;
1267                 }
1268         }
1269
1270 update_cache:
1271         /* Update cache */
1272         ret = client_g_rect(sd, &cam->rect);
1273         if (ret < 0)
1274                 return ret;
1275
1276         update_subrect(cam);
1277
1278         return 0;
1279 }
1280
1281 /**
1282  * @width       - on output: user width, mapped back to input
1283  * @height      - on output: user height, mapped back to input
1284  * @mf          - in- / output camera output window
1285  */
1286 static int client_scale(struct soc_camera_device *icd,
1287                         struct v4l2_mbus_framefmt *mf,
1288                         unsigned int *width, unsigned int *height,
1289                         bool ceu_can_scale)
1290 {
1291         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1292         struct device *dev = icd->dev.parent;
1293         struct v4l2_mbus_framefmt mf_tmp = *mf;
1294         unsigned int scale_h, scale_v;
1295         int ret;
1296
1297         /*
1298          * 5. Apply iterative camera S_FMT for camera user window (also updates
1299          *    client crop cache and the imaginary sub-rectangle).
1300          */
1301         ret = client_s_fmt(icd, &mf_tmp, ceu_can_scale);
1302         if (ret < 0)
1303                 return ret;
1304
1305         dev_geo(dev, "5: camera scaled to %ux%u\n",
1306                 mf_tmp.width, mf_tmp.height);
1307
1308         /* 6. Retrieve camera output window (g_fmt) */
1309
1310         /* unneeded - it is already in "mf_tmp" */
1311
1312         /* 7. Calculate new client scales. */
1313         scale_h = calc_generic_scale(cam->rect.width, mf_tmp.width);
1314         scale_v = calc_generic_scale(cam->rect.height, mf_tmp.height);
1315
1316         mf->width       = mf_tmp.width;
1317         mf->height      = mf_tmp.height;
1318         mf->colorspace  = mf_tmp.colorspace;
1319
1320         /*
1321          * 8. Calculate new CEU crop - apply camera scales to previously
1322          *    updated "effective" crop.
1323          */
1324         *width = scale_down(cam->subrect.width, scale_h);
1325         *height = scale_down(cam->subrect.height, scale_v);
1326
1327         dev_geo(dev, "8: new client sub-window %ux%u\n", *width, *height);
1328
1329         return 0;
1330 }
1331
1332 /*
1333  * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1334  * framerate by always requesting the maximum image from the client. See
1335  * Documentation/video4linux/sh_mobile_camera_ceu.txt for a description of
1336  * scaling and cropping algorithms and for the meaning of referenced here steps.
1337  */
1338 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
1339                                   struct v4l2_crop *a)
1340 {
1341         struct v4l2_rect *rect = &a->c;
1342         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1343         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1344         struct v4l2_crop cam_crop;
1345         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1346         struct v4l2_rect *cam_rect = &cam_crop.c;
1347         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1348         struct device *dev = icd->dev.parent;
1349         struct v4l2_mbus_framefmt mf;
1350         unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
1351                 out_width, out_height, scale_h, scale_v;
1352         int interm_width, interm_height;
1353         u32 capsr, cflcr;
1354         int ret;
1355
1356         dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1357                 rect->left, rect->top);
1358
1359         /* During camera cropping its output window can change too, stop CEU */
1360         capsr = capture_save_reset(pcdev);
1361         dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1362
1363         /* 1. - 2. Apply iterative camera S_CROP for new input window. */
1364         ret = client_s_crop(icd, a, &cam_crop);
1365         if (ret < 0)
1366                 return ret;
1367
1368         dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
1369                 cam_rect->width, cam_rect->height,
1370                 cam_rect->left, cam_rect->top);
1371
1372         /* On success cam_crop contains current camera crop */
1373
1374         /* 3. Retrieve camera output window */
1375         ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1376         if (ret < 0)
1377                 return ret;
1378
1379         if (mf.width > 2560 || mf.height > 1920)
1380                 return -EINVAL;
1381
1382         /* Cache camera output window */
1383         cam->width      = mf.width;
1384         cam->height     = mf.height;
1385
1386         /* 4. Calculate camera scales */
1387         scale_cam_h     = calc_generic_scale(cam_rect->width, mf.width);
1388         scale_cam_v     = calc_generic_scale(cam_rect->height, mf.height);
1389
1390         /* Calculate intermediate window */
1391         interm_width    = scale_down(rect->width, scale_cam_h);
1392         interm_height   = scale_down(rect->height, scale_cam_v);
1393
1394         if (pcdev->image_mode) {
1395                 out_width       = min(interm_width, icd->user_width);
1396                 out_height      = min(interm_height, icd->user_height);
1397         } else {
1398                 out_width       = interm_width;
1399                 out_height      = interm_height;
1400         }
1401
1402         /*
1403          * 5. Calculate CEU scales from camera scales from results of (5) and
1404          *    the user window
1405          */
1406         scale_ceu_h     = calc_scale(interm_width, &out_width);
1407         scale_ceu_v     = calc_scale(interm_height, &out_height);
1408
1409         /* Calculate camera scales */
1410         scale_h         = calc_generic_scale(cam_rect->width, out_width);
1411         scale_v         = calc_generic_scale(cam_rect->height, out_height);
1412
1413         dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1414
1415         /* Apply CEU scales. */
1416         cflcr = scale_ceu_h | (scale_ceu_v << 16);
1417         if (cflcr != pcdev->cflcr) {
1418                 pcdev->cflcr = cflcr;
1419                 ceu_write(pcdev, CFLCR, cflcr);
1420         }
1421
1422         icd->user_width  = out_width;
1423         icd->user_height = out_height;
1424         cam->ceu_left    = scale_down(rect->left - cam_rect->left, scale_h) & ~1;
1425         cam->ceu_top     = scale_down(rect->top - cam_rect->top, scale_v) & ~1;
1426
1427         /* 6. Use CEU cropping to crop to the new window. */
1428         sh_mobile_ceu_set_rect(icd);
1429
1430         cam->subrect = *rect;
1431
1432         dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
1433                 icd->user_width, icd->user_height,
1434                 cam->ceu_left, cam->ceu_top);
1435
1436         /* Restore capture */
1437         if (pcdev->active)
1438                 capsr |= 1;
1439         capture_restore(pcdev, capsr);
1440
1441         /* Even if only camera cropping succeeded */
1442         return ret;
1443 }
1444
1445 static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd,
1446                                   struct v4l2_crop *a)
1447 {
1448         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1449
1450         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1451         a->c = cam->subrect;
1452
1453         return 0;
1454 }
1455
1456 /*
1457  * Calculate real client output window by applying new scales to the current
1458  * client crop. New scales are calculated from the requested output format and
1459  * CEU crop, mapped backed onto the client input (subrect).
1460  */
1461 static void calculate_client_output(struct soc_camera_device *icd,
1462                 struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf)
1463 {
1464         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1465         struct device *dev = icd->dev.parent;
1466         struct v4l2_rect *cam_subrect = &cam->subrect;
1467         unsigned int scale_v, scale_h;
1468
1469         if (cam_subrect->width == cam->rect.width &&
1470             cam_subrect->height == cam->rect.height) {
1471                 /* No sub-cropping */
1472                 mf->width       = pix->width;
1473                 mf->height      = pix->height;
1474                 return;
1475         }
1476
1477         /* 1.-2. Current camera scales and subwin - cached. */
1478
1479         dev_geo(dev, "2: subwin %ux%u@%u:%u\n",
1480                 cam_subrect->width, cam_subrect->height,
1481                 cam_subrect->left, cam_subrect->top);
1482
1483         /*
1484          * 3. Calculate new combined scales from input sub-window to requested
1485          *    user window.
1486          */
1487
1488         /*
1489          * TODO: CEU cannot scale images larger than VGA to smaller than SubQCIF
1490          * (128x96) or larger than VGA
1491          */
1492         scale_h = calc_generic_scale(cam_subrect->width, pix->width);
1493         scale_v = calc_generic_scale(cam_subrect->height, pix->height);
1494
1495         dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v);
1496
1497         /*
1498          * 4. Calculate client output window by applying combined scales to real
1499          *    input window.
1500          */
1501         mf->width       = scale_down(cam->rect.width, scale_h);
1502         mf->height      = scale_down(cam->rect.height, scale_v);
1503 }
1504
1505 /* Similar to set_crop multistage iterative algorithm */
1506 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1507                                  struct v4l2_format *f)
1508 {
1509         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1510         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1511         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1512         struct v4l2_pix_format *pix = &f->fmt.pix;
1513         struct v4l2_mbus_framefmt mf;
1514         struct device *dev = icd->dev.parent;
1515         __u32 pixfmt = pix->pixelformat;
1516         const struct soc_camera_format_xlate *xlate;
1517         unsigned int ceu_sub_width, ceu_sub_height;
1518         u16 scale_v, scale_h;
1519         int ret;
1520         bool image_mode;
1521         enum v4l2_field field;
1522
1523         dev_geo(dev, "S_FMT(pix=0x%x, %ux%u)\n", pixfmt, pix->width, pix->height);
1524
1525         switch (pix->field) {
1526         default:
1527                 pix->field = V4L2_FIELD_NONE;
1528                 /* fall-through */
1529         case V4L2_FIELD_INTERLACED_TB:
1530         case V4L2_FIELD_INTERLACED_BT:
1531         case V4L2_FIELD_NONE:
1532                 field = pix->field;
1533                 break;
1534         case V4L2_FIELD_INTERLACED:
1535                 field = V4L2_FIELD_INTERLACED_TB;
1536                 break;
1537         }
1538
1539         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1540         if (!xlate) {
1541                 dev_warn(dev, "Format %x not found\n", pixfmt);
1542                 return -EINVAL;
1543         }
1544
1545         /* 1.-4. Calculate client output geometry */
1546         calculate_client_output(icd, &f->fmt.pix, &mf);
1547         mf.field        = pix->field;
1548         mf.colorspace   = pix->colorspace;
1549         mf.code         = xlate->code;
1550
1551         switch (pixfmt) {
1552         case V4L2_PIX_FMT_NV12:
1553         case V4L2_PIX_FMT_NV21:
1554         case V4L2_PIX_FMT_NV16:
1555         case V4L2_PIX_FMT_NV61:
1556                 image_mode = true;
1557                 break;
1558         default:
1559                 image_mode = false;
1560         }
1561
1562         dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
1563
1564         /* 5. - 9. */
1565         ret = client_scale(icd, &mf, &ceu_sub_width, &ceu_sub_height,
1566                            image_mode && V4L2_FIELD_NONE == field);
1567
1568         dev_geo(dev, "5-9: client scale return %d\n", ret);
1569
1570         /* Done with the camera. Now see if we can improve the result */
1571
1572         dev_geo(dev, "Camera %d fmt %ux%u, requested %ux%u\n",
1573                 ret, mf.width, mf.height, pix->width, pix->height);
1574         if (ret < 0)
1575                 return ret;
1576
1577         if (mf.code != xlate->code)
1578                 return -EINVAL;
1579
1580         /* 9. Prepare CEU crop */
1581         cam->width = mf.width;
1582         cam->height = mf.height;
1583
1584         /* 10. Use CEU scaling to scale to the requested user window. */
1585
1586         /* We cannot scale up */
1587         if (pix->width > ceu_sub_width)
1588                 ceu_sub_width = pix->width;
1589
1590         if (pix->height > ceu_sub_height)
1591                 ceu_sub_height = pix->height;
1592
1593         pix->colorspace = mf.colorspace;
1594
1595         if (image_mode) {
1596                 /* Scale pix->{width x height} down to width x height */
1597                 scale_h         = calc_scale(ceu_sub_width, &pix->width);
1598                 scale_v         = calc_scale(ceu_sub_height, &pix->height);
1599         } else {
1600                 pix->width      = ceu_sub_width;
1601                 pix->height     = ceu_sub_height;
1602                 scale_h         = 0;
1603                 scale_v         = 0;
1604         }
1605
1606         pcdev->cflcr = scale_h | (scale_v << 16);
1607
1608         /*
1609          * We have calculated CFLCR, the actual configuration will be performed
1610          * in sh_mobile_ceu_set_bus_param()
1611          */
1612
1613         dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1614                 ceu_sub_width, scale_h, pix->width,
1615                 ceu_sub_height, scale_v, pix->height);
1616
1617         cam->code               = xlate->code;
1618         icd->current_fmt        = xlate;
1619
1620         pcdev->field = field;
1621         pcdev->image_mode = image_mode;
1622
1623         return 0;
1624 }
1625
1626 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1627                                  struct v4l2_format *f)
1628 {
1629         const struct soc_camera_format_xlate *xlate;
1630         struct v4l2_pix_format *pix = &f->fmt.pix;
1631         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1632         struct v4l2_mbus_framefmt mf;
1633         __u32 pixfmt = pix->pixelformat;
1634         int width, height;
1635         int ret;
1636
1637         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1638         if (!xlate) {
1639                 dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt);
1640                 return -EINVAL;
1641         }
1642
1643         /* FIXME: calculate using depth and bus width */
1644
1645         v4l_bound_align_image(&pix->width, 2, 2560, 1,
1646                               &pix->height, 4, 1920, 2, 0);
1647
1648         width = pix->width;
1649         height = pix->height;
1650
1651         pix->bytesperline = soc_mbus_bytes_per_line(width, xlate->host_fmt);
1652         if ((int)pix->bytesperline < 0)
1653                 return pix->bytesperline;
1654         pix->sizeimage = height * pix->bytesperline;
1655
1656         /* limit to sensor capabilities */
1657         mf.width        = pix->width;
1658         mf.height       = pix->height;
1659         mf.field        = pix->field;
1660         mf.code         = xlate->code;
1661         mf.colorspace   = pix->colorspace;
1662
1663         ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
1664         if (ret < 0)
1665                 return ret;
1666
1667         pix->width      = mf.width;
1668         pix->height     = mf.height;
1669         pix->field      = mf.field;
1670         pix->colorspace = mf.colorspace;
1671
1672         switch (pixfmt) {
1673         case V4L2_PIX_FMT_NV12:
1674         case V4L2_PIX_FMT_NV21:
1675         case V4L2_PIX_FMT_NV16:
1676         case V4L2_PIX_FMT_NV61:
1677                 /* FIXME: check against rect_max after converting soc-camera */
1678                 /* We can scale precisely, need a bigger image from camera */
1679                 if (pix->width < width || pix->height < height) {
1680                         /*
1681                          * We presume, the sensor behaves sanely, i.e., if
1682                          * requested a bigger rectangle, it will not return a
1683                          * smaller one.
1684                          */
1685                         mf.width = 2560;
1686                         mf.height = 1920;
1687                         ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
1688                         if (ret < 0) {
1689                                 /* Shouldn't actually happen... */
1690                                 dev_err(icd->dev.parent,
1691                                         "FIXME: client try_fmt() = %d\n", ret);
1692                                 return ret;
1693                         }
1694                 }
1695                 /* We will scale exactly */
1696                 if (mf.width > width)
1697                         pix->width = width;
1698                 if (mf.height > height)
1699                         pix->height = height;
1700         }
1701
1702         return ret;
1703 }
1704
1705 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
1706                                  struct v4l2_requestbuffers *p)
1707 {
1708         int i;
1709
1710         /*
1711          * This is for locking debugging only. I removed spinlocks and now I
1712          * check whether .prepare is ever called on a linked buffer, or whether
1713          * a dma IRQ can occur for an in-work or unlinked buffer. Until now
1714          * it hadn't triggered
1715          */
1716         for (i = 0; i < p->count; i++) {
1717                 struct sh_mobile_ceu_buffer *buf;
1718
1719                 buf = container_of(icf->vb_vidq.bufs[i],
1720                                    struct sh_mobile_ceu_buffer, vb);
1721                 INIT_LIST_HEAD(&buf->vb.queue);
1722         }
1723
1724         return 0;
1725 }
1726
1727 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1728 {
1729         struct soc_camera_file *icf = file->private_data;
1730         struct sh_mobile_ceu_buffer *buf;
1731
1732         buf = list_entry(icf->vb_vidq.stream.next,
1733                          struct sh_mobile_ceu_buffer, vb.stream);
1734
1735         poll_wait(file, &buf->vb.done, pt);
1736
1737         if (buf->vb.state == VIDEOBUF_DONE ||
1738             buf->vb.state == VIDEOBUF_ERROR)
1739                 return POLLIN|POLLRDNORM;
1740
1741         return 0;
1742 }
1743
1744 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1745                                   struct v4l2_capability *cap)
1746 {
1747         strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1748         cap->version = KERNEL_VERSION(0, 0, 5);
1749         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1750         return 0;
1751 }
1752
1753 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
1754                                         struct soc_camera_device *icd)
1755 {
1756         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1757         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1758
1759         videobuf_queue_dma_contig_init(q,
1760                                        &sh_mobile_ceu_videobuf_ops,
1761                                        icd->dev.parent, &pcdev->lock,
1762                                        V4L2_BUF_TYPE_VIDEO_CAPTURE,
1763                                        pcdev->field,
1764                                        sizeof(struct sh_mobile_ceu_buffer),
1765                                        icd);
1766 }
1767
1768 static int sh_mobile_ceu_get_parm(struct soc_camera_device *icd,
1769                                   struct v4l2_streamparm *parm)
1770 {
1771         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1772
1773         return v4l2_subdev_call(sd, video, g_parm, parm);
1774 }
1775
1776 static int sh_mobile_ceu_set_parm(struct soc_camera_device *icd,
1777                                   struct v4l2_streamparm *parm)
1778 {
1779         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1780
1781         return v4l2_subdev_call(sd, video, s_parm, parm);
1782 }
1783
1784 static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd,
1785                                   struct v4l2_control *ctrl)
1786 {
1787         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1788         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1789         u32 val;
1790
1791         switch (ctrl->id) {
1792         case V4L2_CID_SHARPNESS:
1793                 val = ceu_read(pcdev, CLFCR);
1794                 ctrl->value = val ^ 1;
1795                 return 0;
1796         }
1797         return -ENOIOCTLCMD;
1798 }
1799
1800 static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd,
1801                                   struct v4l2_control *ctrl)
1802 {
1803         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1804         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1805
1806         switch (ctrl->id) {
1807         case V4L2_CID_SHARPNESS:
1808                 switch (icd->current_fmt->host_fmt->fourcc) {
1809                 case V4L2_PIX_FMT_NV12:
1810                 case V4L2_PIX_FMT_NV21:
1811                 case V4L2_PIX_FMT_NV16:
1812                 case V4L2_PIX_FMT_NV61:
1813                         ceu_write(pcdev, CLFCR, !ctrl->value);
1814                         return 0;
1815                 }
1816                 return -EINVAL;
1817         }
1818         return -ENOIOCTLCMD;
1819 }
1820
1821 static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = {
1822         {
1823                 .id             = V4L2_CID_SHARPNESS,
1824                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
1825                 .name           = "Low-pass filter",
1826                 .minimum        = 0,
1827                 .maximum        = 1,
1828                 .step           = 1,
1829                 .default_value  = 0,
1830         },
1831 };
1832
1833 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
1834         .owner          = THIS_MODULE,
1835         .add            = sh_mobile_ceu_add_device,
1836         .remove         = sh_mobile_ceu_remove_device,
1837         .get_formats    = sh_mobile_ceu_get_formats,
1838         .put_formats    = sh_mobile_ceu_put_formats,
1839         .get_crop       = sh_mobile_ceu_get_crop,
1840         .set_crop       = sh_mobile_ceu_set_crop,
1841         .set_fmt        = sh_mobile_ceu_set_fmt,
1842         .try_fmt        = sh_mobile_ceu_try_fmt,
1843         .set_ctrl       = sh_mobile_ceu_set_ctrl,
1844         .get_ctrl       = sh_mobile_ceu_get_ctrl,
1845         .set_parm       = sh_mobile_ceu_set_parm,
1846         .get_parm       = sh_mobile_ceu_get_parm,
1847         .reqbufs        = sh_mobile_ceu_reqbufs,
1848         .poll           = sh_mobile_ceu_poll,
1849         .querycap       = sh_mobile_ceu_querycap,
1850         .set_bus_param  = sh_mobile_ceu_set_bus_param,
1851         .init_videobuf  = sh_mobile_ceu_init_videobuf,
1852         .controls       = sh_mobile_ceu_controls,
1853         .num_controls   = ARRAY_SIZE(sh_mobile_ceu_controls),
1854 };
1855
1856 static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
1857 {
1858         struct sh_mobile_ceu_dev *pcdev;
1859         struct resource *res;
1860         void __iomem *base;
1861         unsigned int irq;
1862         int err = 0;
1863
1864         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1865         irq = platform_get_irq(pdev, 0);
1866         if (!res || (int)irq <= 0) {
1867                 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
1868                 err = -ENODEV;
1869                 goto exit;
1870         }
1871
1872         pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
1873         if (!pcdev) {
1874                 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1875                 err = -ENOMEM;
1876                 goto exit;
1877         }
1878
1879         INIT_LIST_HEAD(&pcdev->capture);
1880         spin_lock_init(&pcdev->lock);
1881
1882         pcdev->pdata = pdev->dev.platform_data;
1883         if (!pcdev->pdata) {
1884                 err = -EINVAL;
1885                 dev_err(&pdev->dev, "CEU platform data not set.\n");
1886                 goto exit_kfree;
1887         }
1888
1889         base = ioremap_nocache(res->start, resource_size(res));
1890         if (!base) {
1891                 err = -ENXIO;
1892                 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
1893                 goto exit_kfree;
1894         }
1895
1896         pcdev->irq = irq;
1897         pcdev->base = base;
1898         pcdev->video_limit = 0; /* only enabled if second resource exists */
1899
1900         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1901         if (res) {
1902                 err = dma_declare_coherent_memory(&pdev->dev, res->start,
1903                                                   res->start,
1904                                                   resource_size(res),
1905                                                   DMA_MEMORY_MAP |
1906                                                   DMA_MEMORY_EXCLUSIVE);
1907                 if (!err) {
1908                         dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
1909                         err = -ENXIO;
1910                         goto exit_iounmap;
1911                 }
1912
1913                 pcdev->video_limit = resource_size(res);
1914         }
1915
1916         /* request irq */
1917         err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
1918                           dev_name(&pdev->dev), pcdev);
1919         if (err) {
1920                 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
1921                 goto exit_release_mem;
1922         }
1923
1924         pm_suspend_ignore_children(&pdev->dev, true);
1925         pm_runtime_enable(&pdev->dev);
1926         pm_runtime_resume(&pdev->dev);
1927
1928         pcdev->ici.priv = pcdev;
1929         pcdev->ici.v4l2_dev.dev = &pdev->dev;
1930         pcdev->ici.nr = pdev->id;
1931         pcdev->ici.drv_name = dev_name(&pdev->dev);
1932         pcdev->ici.ops = &sh_mobile_ceu_host_ops;
1933
1934         err = soc_camera_host_register(&pcdev->ici);
1935         if (err)
1936                 goto exit_free_clk;
1937
1938         return 0;
1939
1940 exit_free_clk:
1941         pm_runtime_disable(&pdev->dev);
1942         free_irq(pcdev->irq, pcdev);
1943 exit_release_mem:
1944         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1945                 dma_release_declared_memory(&pdev->dev);
1946 exit_iounmap:
1947         iounmap(base);
1948 exit_kfree:
1949         kfree(pcdev);
1950 exit:
1951         return err;
1952 }
1953
1954 static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
1955 {
1956         struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1957         struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
1958                                         struct sh_mobile_ceu_dev, ici);
1959
1960         soc_camera_host_unregister(soc_host);
1961         pm_runtime_disable(&pdev->dev);
1962         free_irq(pcdev->irq, pcdev);
1963         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1964                 dma_release_declared_memory(&pdev->dev);
1965         iounmap(pcdev->base);
1966         kfree(pcdev);
1967         return 0;
1968 }
1969
1970 static int sh_mobile_ceu_runtime_nop(struct device *dev)
1971 {
1972         /* Runtime PM callback shared between ->runtime_suspend()
1973          * and ->runtime_resume(). Simply returns success.
1974          *
1975          * This driver re-initializes all registers after
1976          * pm_runtime_get_sync() anyway so there is no need
1977          * to save and restore registers here.
1978          */
1979         return 0;
1980 }
1981
1982 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
1983         .runtime_suspend = sh_mobile_ceu_runtime_nop,
1984         .runtime_resume = sh_mobile_ceu_runtime_nop,
1985 };
1986
1987 static struct platform_driver sh_mobile_ceu_driver = {
1988         .driver         = {
1989                 .name   = "sh_mobile_ceu",
1990                 .pm     = &sh_mobile_ceu_dev_pm_ops,
1991         },
1992         .probe          = sh_mobile_ceu_probe,
1993         .remove         = __devexit_p(sh_mobile_ceu_remove),
1994 };
1995
1996 static int __init sh_mobile_ceu_init(void)
1997 {
1998         return platform_driver_register(&sh_mobile_ceu_driver);
1999 }
2000
2001 static void __exit sh_mobile_ceu_exit(void)
2002 {
2003         platform_driver_unregister(&sh_mobile_ceu_driver);
2004 }
2005
2006 module_init(sh_mobile_ceu_init);
2007 module_exit(sh_mobile_ceu_exit);
2008
2009 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
2010 MODULE_AUTHOR("Magnus Damm");
2011 MODULE_LICENSE("GPL");
2012 MODULE_ALIAS("platform:sh_mobile_ceu");