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

   1 /*
   2  * V4L2 Driver for SuperH Mobile CEU interface
   3  *
   4  * Copyright (C) 2008 Magnus Damm
   5  *
   6  * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
   7  *
   8  * Copyright (C) 2006, Sascha Hauer, Pengutronix
   9  * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  */
  16
  17 #include <linux/init.h>
  18 #include <linux/module.h>
  19 #include <linux/io.h>
  20 #include <linux/delay.h>
  21 #include <linux/dma-mapping.h>
  22 #include <linux/errno.h>
  23 #include <linux/fs.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/kernel.h>
  26 #include <linux/mm.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/time.h>
  29 #include <linux/version.h>
  30 #include <linux/device.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/videodev2.h>
  33 #include <linux/pm_runtime.h>
  34
  35 #include <media/v4l2-common.h>
  36 #include <media/v4l2-dev.h>
  37 #include <media/soc_camera.h>
  38 #include <media/sh_mobile_ceu.h>
  39 #include <media/videobuf-dma-contig.h>
  40
  41 /* register offsets for sh7722 / sh7723 */
  42
  43 #define CAPSR  0x00 /* Capture start register */
  44 #define CAPCR  0x04 /* Capture control register */
  45 #define CAMCR  0x08 /* Capture interface control register */
  46 #define CMCYR  0x0c /* Capture interface cycle  register */
  47 #define CAMOR  0x10 /* Capture interface offset register */
  48 #define CAPWR  0x14 /* Capture interface width register */
  49 #define CAIFR  0x18 /* Capture interface input format register */
  50 #define CSTCR  0x20 /* Camera strobe control register (<= sh7722) */
  51 #define CSECR  0x24 /* Camera strobe emission count register (<= sh7722) */
  52 #define CRCNTR 0x28 /* CEU register control register */
  53 #define CRCMPR 0x2c /* CEU register forcible control register */
  54 #define CFLCR  0x30 /* Capture filter control register */
  55 #define CFSZR  0x34 /* Capture filter size clip register */
  56 #define CDWDR  0x38 /* Capture destination width register */
  57 #define CDAYR  0x3c /* Capture data address Y register */
  58 #define CDACR  0x40 /* Capture data address C register */
  59 #define CDBYR  0x44 /* Capture data bottom-field address Y register */
  60 #define CDBCR  0x48 /* Capture data bottom-field address C register */
  61 #define CBDSR  0x4c /* Capture bundle destination size register */
  62 #define CFWCR  0x5c /* Firewall operation control register */
  63 #define CLFCR  0x60 /* Capture low-pass filter control register */
  64 #define CDOCR  0x64 /* Capture data output control register */
  65 #define CDDCR  0x68 /* Capture data complexity level register */
  66 #define CDDAR  0x6c /* Capture data complexity level address register */
  67 #define CEIER  0x70 /* Capture event interrupt enable register */
  68 #define CETCR  0x74 /* Capture event flag clear register */
  69 #define CSTSR  0x7c /* Capture status register */
  70 #define CSRTR  0x80 /* Capture software reset register */
  71 #define CDSSR  0x84 /* Capture data size register */
  72 #define CDAYR2 0x90 /* Capture data address Y register 2 */
  73 #define CDACR2 0x94 /* Capture data address C register 2 */
  74 #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
  75 #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
  76
  77 /* per video frame buffer */
  78 struct sh_mobile_ceu_buffer {
  79         struct videobuf_buffer vb; /* v4l buffer must be first */
  80         const struct soc_camera_data_format *fmt;
  81 };
  82
  83 struct sh_mobile_ceu_dev {
  84         struct soc_camera_host ici;
  85         struct soc_camera_device *icd;
  86
  87         unsigned int irq;
  88         void __iomem *base;
  89         unsigned long video_limit;
  90
  91         /* lock used to protect videobuf */
  92         spinlock_t lock;
  93         struct list_head capture;
  94         struct videobuf_buffer *active;
  95
  96         struct sh_mobile_ceu_info *pdata;
  97
  98         u32 cflcr;
  99
 100         unsigned int is_interlaced:1;
 101         unsigned int image_mode:1;
 102         unsigned int is_16bit:1;
 103 };
 104
 105 struct sh_mobile_ceu_cam {
 106         struct v4l2_rect camera_rect;
 107         struct v4l2_rect camera_max;
 108         const struct soc_camera_data_format *extra_fmt;
 109         const struct soc_camera_data_format *camera_fmt;
 110 };
 111
 112 static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
 113 {
 114         unsigned long flags;
 115
 116         flags = SOCAM_MASTER |
 117                 SOCAM_PCLK_SAMPLE_RISING |
 118                 SOCAM_HSYNC_ACTIVE_HIGH |
 119                 SOCAM_HSYNC_ACTIVE_LOW |
 120                 SOCAM_VSYNC_ACTIVE_HIGH |
 121                 SOCAM_VSYNC_ACTIVE_LOW |
 122                 SOCAM_DATA_ACTIVE_HIGH;
 123
 124         if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
 125                 flags |= SOCAM_DATAWIDTH_8;
 126
 127         if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
 128                 flags |= SOCAM_DATAWIDTH_16;
 129
 130         if (flags & SOCAM_DATAWIDTH_MASK)
 131                 return flags;
 132
 133         return 0;
 134 }
 135
 136 static void ceu_write(struct sh_mobile_ceu_dev *priv,
 137                       unsigned long reg_offs, u32 data)
 138 {
 139         iowrite32(data, priv->base + reg_offs);
 140 }
 141
 142 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
 143 {
 144         return ioread32(priv->base + reg_offs);
 145 }
 146
 147 /*
 148  *  Videobuf operations
 149  */
 150 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
 151                                         unsigned int *count,
 152                                         unsigned int *size)
 153 {
 154         struct soc_camera_device *icd = vq->priv_data;
 155         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 156         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 157         int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
 158
 159         *size = PAGE_ALIGN(icd->rect_current.width * icd->rect_current.height *
 160                            bytes_per_pixel);
 161
 162         if (0 == *count)
 163                 *count = 2;
 164
 165         if (pcdev->video_limit) {
 166                 while (*size * *count > pcdev->video_limit)
 167                         (*count)--;
 168         }
 169
 170         dev_dbg(icd->dev.parent, "count=%d, size=%d\n", *count, *size);
 171
 172         return 0;
 173 }
 174
 175 static void free_buffer(struct videobuf_queue *vq,
 176                         struct sh_mobile_ceu_buffer *buf)
 177 {
 178         struct soc_camera_device *icd = vq->priv_data;
 179
 180         dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 181                 &buf->vb, buf->vb.baddr, buf->vb.bsize);
 182
 183         if (in_interrupt())
 184                 BUG();
 185
 186         videobuf_waiton(&buf->vb, 0, 0);
 187         videobuf_dma_contig_free(vq, &buf->vb);
 188         dev_dbg(icd->dev.parent, "%s freed\n", __func__);
 189         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 190 }
 191
 192 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
 193 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
 194 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
 195 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
 196
 197
 198 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
 199 {
 200         struct soc_camera_device *icd = pcdev->icd;
 201         dma_addr_t phys_addr_top, phys_addr_bottom;
 202
 203         /* The hardware is _very_ picky about this sequence. Especially
 204          * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
 205          * several not-so-well documented interrupt sources in CETCR.
 206          */
 207         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_CPEIE);
 208         ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC);
 209         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE);
 210         ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
 211         ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
 212
 213         if (!pcdev->active)
 214                 return;
 215
 216         phys_addr_top = videobuf_to_dma_contig(pcdev->active);
 217         ceu_write(pcdev, CDAYR, phys_addr_top);
 218         if (pcdev->is_interlaced) {
 219                 phys_addr_bottom = phys_addr_top + icd->rect_current.width;
 220                 ceu_write(pcdev, CDBYR, phys_addr_bottom);
 221         }
 222
 223         switch (icd->current_fmt->fourcc) {
 224         case V4L2_PIX_FMT_NV12:
 225         case V4L2_PIX_FMT_NV21:
 226         case V4L2_PIX_FMT_NV16:
 227         case V4L2_PIX_FMT_NV61:
 228                 phys_addr_top += icd->rect_current.width *
 229                         icd->rect_current.height;
 230                 ceu_write(pcdev, CDACR, phys_addr_top);
 231                 if (pcdev->is_interlaced) {
 232                         phys_addr_bottom = phys_addr_top +
 233                                 icd->rect_current.width;
 234                         ceu_write(pcdev, CDBCR, phys_addr_bottom);
 235                 }
 236         }
 237
 238         pcdev->active->state = VIDEOBUF_ACTIVE;
 239         ceu_write(pcdev, CAPSR, 0x1); /* start capture */
 240 }
 241
 242 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
 243                                           struct videobuf_buffer *vb,
 244                                           enum v4l2_field field)
 245 {
 246         struct soc_camera_device *icd = vq->priv_data;
 247         struct sh_mobile_ceu_buffer *buf;
 248         int ret;
 249
 250         buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
 251
 252         dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 253                 vb, vb->baddr, vb->bsize);
 254
 255         /* Added list head initialization on alloc */
 256         WARN_ON(!list_empty(&vb->queue));
 257
 258 #ifdef DEBUG
 259         /* This can be useful if you want to see if we actually fill
 260          * the buffer with something */
 261         memset((void *)vb->baddr, 0xaa, vb->bsize);
 262 #endif
 263
 264         BUG_ON(NULL == icd->current_fmt);
 265
 266         if (buf->fmt    != icd->current_fmt ||
 267             vb->width   != icd->rect_current.width ||
 268             vb->height  != icd->rect_current.height ||
 269             vb->field   != field) {
 270                 buf->fmt        = icd->current_fmt;
 271                 vb->width       = icd->rect_current.width;
 272                 vb->height      = icd->rect_current.height;
 273                 vb->field       = field;
 274                 vb->state       = VIDEOBUF_NEEDS_INIT;
 275         }
 276
 277         vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
 278         if (0 != vb->baddr && vb->bsize < vb->size) {
 279                 ret = -EINVAL;
 280                 goto out;
 281         }
 282
 283         if (vb->state == VIDEOBUF_NEEDS_INIT) {
 284                 ret = videobuf_iolock(vq, vb, NULL);
 285                 if (ret)
 286                         goto fail;
 287                 vb->state = VIDEOBUF_PREPARED;
 288         }
 289
 290         return 0;
 291 fail:
 292         free_buffer(vq, buf);
 293 out:
 294         return ret;
 295 }
 296
 297 /* Called under spinlock_irqsave(&pcdev->lock, ...) */
 298 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
 299                                          struct videobuf_buffer *vb)
 300 {
 301         struct soc_camera_device *icd = vq->priv_data;
 302         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 303         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 304
 305         dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 306                 vb, vb->baddr, vb->bsize);
 307
 308         vb->state = VIDEOBUF_QUEUED;
 309         list_add_tail(&vb->queue, &pcdev->capture);
 310
 311         if (!pcdev->active) {
 312                 pcdev->active = vb;
 313                 sh_mobile_ceu_capture(pcdev);
 314         }
 315 }
 316
 317 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
 318                                            struct videobuf_buffer *vb)
 319 {
 320         struct soc_camera_device *icd = vq->priv_data;
 321         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 322         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 323         unsigned long flags;
 324
 325         spin_lock_irqsave(&pcdev->lock, flags);
 326
 327         if (pcdev->active == vb) {
 328                 /* disable capture (release DMA buffer), reset */
 329                 ceu_write(pcdev, CAPSR, 1 << 16);
 330                 pcdev->active = NULL;
 331         }
 332
 333         if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) &&
 334             !list_empty(&vb->queue)) {
 335                 vb->state = VIDEOBUF_ERROR;
 336                 list_del_init(&vb->queue);
 337         }
 338
 339         spin_unlock_irqrestore(&pcdev->lock, flags);
 340
 341         free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
 342 }
 343
 344 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
 345         .buf_setup      = sh_mobile_ceu_videobuf_setup,
 346         .buf_prepare    = sh_mobile_ceu_videobuf_prepare,
 347         .buf_queue      = sh_mobile_ceu_videobuf_queue,
 348         .buf_release    = sh_mobile_ceu_videobuf_release,
 349 };
 350
 351 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
 352 {
 353         struct sh_mobile_ceu_dev *pcdev = data;
 354         struct videobuf_buffer *vb;
 355         unsigned long flags;
 356
 357         spin_lock_irqsave(&pcdev->lock, flags);
 358
 359         vb = pcdev->active;
 360         if (!vb)
 361                 /* Stale interrupt from a released buffer */
 362                 goto out;
 363
 364         list_del_init(&vb->queue);
 365
 366         if (!list_empty(&pcdev->capture))
 367                 pcdev->active = list_entry(pcdev->capture.next,
 368                                            struct videobuf_buffer, queue);
 369         else
 370                 pcdev->active = NULL;
 371
 372         sh_mobile_ceu_capture(pcdev);
 373
 374         vb->state = VIDEOBUF_DONE;
 375         do_gettimeofday(&vb->ts);
 376         vb->field_count++;
 377         wake_up(&vb->done);
 378
 379 out:
 380         spin_unlock_irqrestore(&pcdev->lock, flags);
 381
 382         return IRQ_HANDLED;
 383 }
 384
 385 /* Called with .video_lock held */
 386 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
 387 {
 388         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 389         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 390
 391         if (pcdev->icd)
 392                 return -EBUSY;
 393
 394         dev_info(icd->dev.parent,
 395                  "SuperH Mobile CEU driver attached to camera %d\n",
 396                  icd->devnum);
 397
 398         clk_enable(pcdev->clk);
 399
 400         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
 401         while (ceu_read(pcdev, CSTSR) & 1)
 402                 msleep(1);
 403
 404         pcdev->icd = icd;
 405
 406         return 0;
 407 }
 408
 409 /* Called with .video_lock held */
 410 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
 411 {
 412         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 413         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 414         unsigned long flags;
 415
 416         BUG_ON(icd != pcdev->icd);
 417
 418         /* disable capture, disable interrupts */
 419         ceu_write(pcdev, CEIER, 0);
 420         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
 421
 422         /* make sure active buffer is canceled */
 423         spin_lock_irqsave(&pcdev->lock, flags);
 424         if (pcdev->active) {
 425                 list_del(&pcdev->active->queue);
 426                 pcdev->active->state = VIDEOBUF_ERROR;
 427                 wake_up_all(&pcdev->active->done);
 428                 pcdev->active = NULL;
 429         }
 430         spin_unlock_irqrestore(&pcdev->lock, flags);
 431
 432         clk_disable(pcdev->clk);
 433
 434         dev_info(icd->dev.parent,
 435                  "SuperH Mobile CEU driver detached from camera %d\n",
 436                  icd->devnum);
 437
 438         pcdev->icd = NULL;
 439 }
 440
 441 /*
 442  * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
 443  * in SH7722 Hardware Manual
 444  */
 445 static unsigned int size_dst(unsigned int src, unsigned int scale)
 446 {
 447         unsigned int mant_pre = scale >> 12;
 448         if (!src || !scale)
 449                 return src;
 450         return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
 451                 mant_pre * 4096 / scale + 1;
 452 }
 453
 454 static unsigned int size_src(unsigned int dst, unsigned int scale)
 455 {
 456         unsigned int mant_pre = scale >> 12, tmp;
 457         if (!dst || !scale)
 458                 return dst;
 459         for (tmp = ((dst - 1) * scale + 2048 * mant_pre) / 4096 + 1;
 460              size_dst(tmp, scale) < dst;
 461              tmp++)
 462                 ;
 463         return tmp;
 464 }
 465
 466 static u16 calc_scale(unsigned int src, unsigned int *dst)
 467 {
 468         u16 scale;
 469
 470         if (src == *dst)
 471                 return 0;
 472
 473         scale = (src * 4096 / *dst) & ~7;
 474
 475         while (scale > 4096 && size_dst(src, scale) < *dst)
 476                 scale -= 8;
 477
 478         *dst = size_dst(src, scale);
 479
 480         return scale;
 481 }
 482
 483 /* rect is guaranteed to not exceed the scaled camera rectangle */
 484 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd,
 485                                    struct v4l2_rect *rect)
 486 {
 487         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 488         struct sh_mobile_ceu_cam *cam = icd->host_priv;
 489         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 490         int width, height, cfszr_width, cdwdr_width, in_width, in_height;
 491         unsigned int left_offset, top_offset, left, top;
 492         unsigned int hscale = pcdev->cflcr & 0xffff;
 493         unsigned int vscale = (pcdev->cflcr >> 16) & 0xffff;
 494         u32 camor;
 495
 496         /* Switch to the camera scale */
 497         left = size_src(rect->left, hscale);
 498         top = size_src(rect->top, vscale);
 499
 500         dev_dbg(icd->dev.parent, "Left %u * 0x%x = %u, top %u * 0x%x = %u\n",
 501                 rect->left, hscale, left, rect->top, vscale, top);
 502
 503         if (left > cam->camera_rect.left) {
 504                 left_offset = left - cam->camera_rect.left;
 505         } else {
 506                 left_offset = 0;
 507                 left = cam->camera_rect.left;
 508         }
 509
 510         if (top > cam->camera_rect.top) {
 511                 top_offset = top - cam->camera_rect.top;
 512         } else {
 513                 top_offset = 0;
 514                 top = cam->camera_rect.top;
 515         }
 516
 517         dev_dbg(icd->dev.parent, "New left %u, top %u, offsets %u:%u\n",
 518                 rect->left, rect->top, left_offset, top_offset);
 519
 520         if (pcdev->image_mode) {
 521                 width = rect->width;
 522                 in_width = cam->camera_rect.width;
 523                 if (!pcdev->is_16bit) {
 524                         width *= 2;
 525                         in_width *= 2;
 526                         left_offset *= 2;
 527                 }
 528                 cfszr_width = cdwdr_width = rect->width;
 529         } else {
 530                 unsigned int w_factor = (icd->current_fmt->depth + 7) >> 3;
 531                 if (!pcdev->is_16bit)
 532                         w_factor *= 2;
 533
 534                 width = rect->width * w_factor / 2;
 535                 in_width = cam->camera_rect.width * w_factor / 2;
 536                 left_offset = left_offset * w_factor / 2;
 537
 538                 cfszr_width = pcdev->is_16bit ? width : width / 2;
 539                 cdwdr_width = pcdev->is_16bit ? width * 2 : width;
 540         }
 541
 542         height = rect->height;
 543         in_height = cam->camera_rect.height;
 544         if (pcdev->is_interlaced) {
 545                 height /= 2;
 546                 in_height /= 2;
 547                 top_offset /= 2;
 548                 cdwdr_width *= 2;
 549         }
 550
 551         camor = left_offset | (top_offset << 16);
 552         ceu_write(pcdev, CAMOR, camor);
 553         ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
 554         ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width);
 555         ceu_write(pcdev, CDWDR, cdwdr_width);
 556 }
 557
 558 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
 559 {
 560         u32 capsr = ceu_read(pcdev, CAPSR);
 561         ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
 562         return capsr;
 563 }
 564
 565 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
 566 {
 567         unsigned long timeout = jiffies + 10 * HZ;
 568
 569         /*
 570          * Wait until the end of the current frame. It can take a long time,
 571          * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
 572          */
 573         while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
 574                 msleep(1);
 575
 576         if (time_after(jiffies, timeout)) {
 577                 dev_err(pcdev->ici.v4l2_dev.dev,
 578                         "Timeout waiting for frame end! Interface problem?\n");
 579                 return;
 580         }
 581
 582         /* Wait until reset clears, this shall not hang... */
 583         while (ceu_read(pcdev, CAPSR) & (1 << 16))
 584                 udelay(10);
 585
 586         /* Anything to restore? */
 587         if (capsr & ~(1 << 16))
 588                 ceu_write(pcdev, CAPSR, capsr);
 589 }
 590
 591 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
 592                                        __u32 pixfmt)
 593 {
 594         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 595         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 596         int ret;
 597         unsigned long camera_flags, common_flags, value;
 598         int yuv_lineskip;
 599         struct sh_mobile_ceu_cam *cam = icd->host_priv;
 600         u32 capsr = capture_save_reset(pcdev);
 601
 602         camera_flags = icd->ops->query_bus_param(icd);
 603         common_flags = soc_camera_bus_param_compatible(camera_flags,
 604                                                        make_bus_param(pcdev));
 605         if (!common_flags)
 606                 return -EINVAL;
 607
 608         ret = icd->ops->set_bus_param(icd, common_flags);
 609         if (ret < 0)
 610                 return ret;
 611
 612         switch (common_flags & SOCAM_DATAWIDTH_MASK) {
 613         case SOCAM_DATAWIDTH_8:
 614                 pcdev->is_16bit = 0;
 615                 break;
 616         case SOCAM_DATAWIDTH_16:
 617                 pcdev->is_16bit = 1;
 618                 break;
 619         default:
 620                 return -EINVAL;
 621         }
 622
 623         ceu_write(pcdev, CRCNTR, 0);
 624         ceu_write(pcdev, CRCMPR, 0);
 625
 626         value = 0x00000010; /* data fetch by default */
 627         yuv_lineskip = 0;
 628
 629         switch (icd->current_fmt->fourcc) {
 630         case V4L2_PIX_FMT_NV12:
 631         case V4L2_PIX_FMT_NV21:
 632                 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
 633                 /* fall-through */
 634         case V4L2_PIX_FMT_NV16:
 635         case V4L2_PIX_FMT_NV61:
 636                 switch (cam->camera_fmt->fourcc) {
 637                 case V4L2_PIX_FMT_UYVY:
 638                         value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
 639                         break;
 640                 case V4L2_PIX_FMT_VYUY:
 641                         value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
 642                         break;
 643                 case V4L2_PIX_FMT_YUYV:
 644                         value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
 645                         break;
 646                 case V4L2_PIX_FMT_YVYU:
 647                         value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
 648                         break;
 649                 default:
 650                         BUG();
 651                 }
 652         }
 653
 654         if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
 655             icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
 656                 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
 657
 658         value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
 659         value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
 660         value |= pcdev->is_16bit ? 1 << 12 : 0;
 661         ceu_write(pcdev, CAMCR, value);
 662
 663         ceu_write(pcdev, CAPCR, 0x00300000);
 664         ceu_write(pcdev, CAIFR, pcdev->is_interlaced ? 0x101 : 0);
 665
 666         mdelay(1);
 667         sh_mobile_ceu_set_rect(icd, &icd->rect_current);
 668
 669         ceu_write(pcdev, CFLCR, pcdev->cflcr);
 670
 671         /* A few words about byte order (observed in Big Endian mode)
 672          *
 673          * In data fetch mode bytes are received in chunks of 8 bytes.
 674          * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
 675          *
 676          * The data is however by default written to memory in reverse order:
 677          * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
 678          *
 679          * The lowest three bits of CDOCR allows us to do swapping,
 680          * using 7 we swap the data bytes to match the incoming order:
 681          * D0, D1, D2, D3, D4, D5, D6, D7
 682          */
 683         value = 0x00000017;
 684         if (yuv_lineskip)
 685                 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
 686
 687         ceu_write(pcdev, CDOCR, value);
 688         ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
 689
 690         dev_dbg(icd->dev.parent, "S_FMT successful for %c%c%c%c %ux%u@%u:%u\n",
 691                 pixfmt & 0xff, (pixfmt >> 8) & 0xff,
 692                 (pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
 693                 icd->rect_current.width, icd->rect_current.height,
 694                 icd->rect_current.left, icd->rect_current.top);
 695
 696         capture_restore(pcdev, capsr);
 697
 698         /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
 699         return 0;
 700 }
 701
 702 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
 703 {
 704         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 705         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 706         unsigned long camera_flags, common_flags;
 707
 708         camera_flags = icd->ops->query_bus_param(icd);
 709         common_flags = soc_camera_bus_param_compatible(camera_flags,
 710                                                        make_bus_param(pcdev));
 711         if (!common_flags)
 712                 return -EINVAL;
 713
 714         return 0;
 715 }
 716
 717 static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
 718         {
 719                 .name           = "NV12",
 720                 .depth          = 12,
 721                 .fourcc         = V4L2_PIX_FMT_NV12,
 722                 .colorspace     = V4L2_COLORSPACE_JPEG,
 723         },
 724         {
 725                 .name           = "NV21",
 726                 .depth          = 12,
 727                 .fourcc         = V4L2_PIX_FMT_NV21,
 728                 .colorspace     = V4L2_COLORSPACE_JPEG,
 729         },
 730         {
 731                 .name           = "NV16",
 732                 .depth          = 16,
 733                 .fourcc         = V4L2_PIX_FMT_NV16,
 734                 .colorspace     = V4L2_COLORSPACE_JPEG,
 735         },
 736         {
 737                 .name           = "NV61",
 738                 .depth          = 16,
 739                 .fourcc         = V4L2_PIX_FMT_NV61,
 740                 .colorspace     = V4L2_COLORSPACE_JPEG,
 741         },
 742 };
 743
 744 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
 745                                      struct soc_camera_format_xlate *xlate)
 746 {
 747         int ret, k, n;
 748         int formats = 0;
 749         struct sh_mobile_ceu_cam *cam;
 750
 751         ret = sh_mobile_ceu_try_bus_param(icd);
 752         if (ret < 0)
 753                 return 0;
 754
 755         if (!icd->host_priv) {
 756                 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
 757                 if (!cam)
 758                         return -ENOMEM;
 759
 760                 icd->host_priv = cam;
 761                 cam->camera_max = icd->rect_max;
 762         } else {
 763                 cam = icd->host_priv;
 764         }
 765
 766         /* Beginning of a pass */
 767         if (!idx)
 768                 cam->extra_fmt = NULL;
 769
 770         switch (icd->formats[idx].fourcc) {
 771         case V4L2_PIX_FMT_UYVY:
 772         case V4L2_PIX_FMT_VYUY:
 773         case V4L2_PIX_FMT_YUYV:
 774         case V4L2_PIX_FMT_YVYU:
 775                 if (cam->extra_fmt)
 776                         goto add_single_format;
 777
 778                 /*
 779                  * Our case is simple so far: for any of the above four camera
 780                  * formats we add all our four synthesized NV* formats, so,
 781                  * just marking the device with a single flag suffices. If
 782                  * the format generation rules are more complex, you would have
 783                  * to actually hang your already added / counted formats onto
 784                  * the host_priv pointer and check whether the format you're
 785                  * going to add now is already there.
 786                  */
 787                 cam->extra_fmt = (void *)sh_mobile_ceu_formats;
 788
 789                 n = ARRAY_SIZE(sh_mobile_ceu_formats);
 790                 formats += n;
 791                 for (k = 0; xlate && k < n; k++) {
 792                         xlate->host_fmt = &sh_mobile_ceu_formats[k];
 793                         xlate->cam_fmt = icd->formats + idx;
 794                         xlate->buswidth = icd->formats[idx].depth;
 795                         xlate++;
 796                         dev_dbg(icd->dev.parent,
 797                                 "Providing format %s using %s\n",
 798                                 sh_mobile_ceu_formats[k].name,
 799                                 icd->formats[idx].name);
 800                 }
 801         default:
 802 add_single_format:
 803                 /* Generic pass-through */
 804                 formats++;
 805                 if (xlate) {
 806                         xlate->host_fmt = icd->formats + idx;
 807                         xlate->cam_fmt = icd->formats + idx;
 808                         xlate->buswidth = icd->formats[idx].depth;
 809                         xlate++;
 810                         dev_dbg(icd->dev.parent,
 811                                 "Providing format %s in pass-through mode\n",
 812                                 icd->formats[idx].name);
 813                 }
 814         }
 815
 816         return formats;
 817 }
 818
 819 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
 820 {
 821         kfree(icd->host_priv);
 822         icd->host_priv = NULL;
 823 }
 824
 825 /* Check if any dimension of r1 is smaller than respective one of r2 */
 826 static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2)
 827 {
 828         return r1->width < r2->width || r1->height < r2->height;
 829 }
 830
 831 /* Check if r1 fails to cover r2 */
 832 static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2)
 833 {
 834         return r1->left > r2->left || r1->top > r2->top ||
 835                 r1->left + r1->width < r2->left + r2->width ||
 836                 r1->top + r1->height < r2->top + r2->height;
 837 }
 838
 839 /*
 840  * CEU can scale and crop, but we don't want to waste bandwidth and kill the
 841  * framerate by always requesting the maximum image from the client. For
 842  * cropping we also have to take care of the current scale. The common for both
 843  * scaling and cropping approach is:
 844  * 1. try if the client can produce exactly what requested by the user
 845  * 2. if (1) failed, try to double the client image until we get one big enough
 846  * 3. if (2) failed, try to request the maximum image
 847  */
 848 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
 849                                   struct v4l2_crop *a)
 850 {
 851         struct v4l2_rect *rect = &a->c;
 852         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 853         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 854         struct v4l2_crop cam_crop;
 855         struct v4l2_rect *cam_rect = &cam_crop.c, target, cam_max;
 856         struct sh_mobile_ceu_cam *cam = icd->host_priv;
 857         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 858         unsigned int hscale = pcdev->cflcr & 0xffff;
 859         unsigned int vscale = (pcdev->cflcr >> 16) & 0xffff;
 860         unsigned short width, height;
 861         u32 capsr;
 862         int ret;
 863
 864         /* Scale back up into client units */
 865         cam_rect->left  = size_src(rect->left, hscale);
 866         cam_rect->width = size_src(rect->width, hscale);
 867         cam_rect->top   = size_src(rect->top, vscale);
 868         cam_rect->height        = size_src(rect->height, vscale);
 869
 870         target = *cam_rect;
 871
 872         capsr = capture_save_reset(pcdev);
 873         dev_dbg(icd->dev.parent, "CAPSR 0x%x, CFLCR 0x%x\n",
 874                 capsr, pcdev->cflcr);
 875
 876         /* First attempt - see if the client can deliver a perfect result */
 877         ret = v4l2_subdev_call(sd, video, s_crop, &cam_crop);
 878         if (!ret && !memcmp(&target, &cam_rect, sizeof(target))) {
 879                 dev_dbg(icd->dev.parent,
 880                         "Camera S_CROP successful for %ux%u@%u:%u\n",
 881                         cam_rect->width, cam_rect->height,
 882                         cam_rect->left, cam_rect->top);
 883                 goto ceu_set_rect;
 884         }
 885
 886         /* Try to fix cropping, that camera hasn't managed to do */
 887         dev_dbg(icd->dev.parent, "Fix camera S_CROP %d for %ux%u@%u:%u"
 888                 " to %ux%u@%u:%u\n",
 889                 ret, cam_rect->width, cam_rect->height,
 890                 cam_rect->left, cam_rect->top,
 891                 target.width, target.height, target.left, target.top);
 892
 893         /*
 894          * Popular special case - some cameras can only handle fixed sizes like
 895          * QVGA, VGA,... Take care to avoid infinite loop.
 896          */
 897         width = max(cam_rect->width, 1);
 898         height = max(cam_rect->height, 1);
 899         cam_max.width = size_src(icd->rect_max.width, hscale);
 900         cam_max.left = size_src(icd->rect_max.left, hscale);
 901         cam_max.height = size_src(icd->rect_max.height, vscale);
 902         cam_max.top = size_src(icd->rect_max.top, vscale);
 903         while (!ret && (is_smaller(cam_rect, &target) ||
 904                         is_inside(cam_rect, &target)) &&
 905                cam_max.width >= width && cam_max.height >= height) {
 906
 907                 width *= 2;
 908                 height *= 2;
 909                 cam_rect->width = width;
 910                 cam_rect->height = height;
 911
 912                 /* We do not know what the camera is capable of, play safe */
 913                 if (cam_rect->left > target.left)
 914                         cam_rect->left = cam_max.left;
 915
 916                 if (cam_rect->left + cam_rect->width < target.left + target.width)
 917                         cam_rect->width = target.left + target.width -
 918                                 cam_rect->left;
 919
 920                 if (cam_rect->top > target.top)
 921                         cam_rect->top = cam_max.top;
 922
 923                 if (cam_rect->top + cam_rect->height < target.top + target.height)
 924                         cam_rect->height = target.top + target.height -
 925                                 cam_rect->top;
 926
 927                 if (cam_rect->width + cam_rect->left >
 928                     cam_max.width + cam_max.left)
 929                         cam_rect->left = max(cam_max.width + cam_max.left -
 930                                              cam_rect->width, cam_max.left);
 931
 932                 if (cam_rect->height + cam_rect->top >
 933                     cam_max.height + cam_max.top)
 934                         cam_rect->top = max(cam_max.height + cam_max.top -
 935                                             cam_rect->height, cam_max.top);
 936
 937                 ret = v4l2_subdev_call(sd, video, s_crop, &cam_crop);
 938                 dev_dbg(icd->dev.parent, "Camera S_CROP %d for %ux%u@%u:%u\n",
 939                         ret, cam_rect->width, cam_rect->height,
 940                         cam_rect->left, cam_rect->top);
 941         }
 942
 943         /*
 944          * If the camera failed to configure cropping, it should not modify the
 945          * rectangle
 946          */
 947         if ((ret < 0 && (is_smaller(&icd->rect_current, rect) ||
 948                          is_inside(&icd->rect_current, rect))) ||
 949             is_smaller(cam_rect, &target) || is_inside(cam_rect, &target)) {
 950                 /*
 951                  * The camera failed to configure a suitable cropping,
 952                  * we cannot use the current rectangle, set to max
 953                  */
 954                 *cam_rect = cam_max;
 955                 ret = v4l2_subdev_call(sd, video, s_crop, &cam_crop);
 956                 dev_dbg(icd->dev.parent,
 957                         "Camera S_CROP %d for max %ux%u@%u:%u\n",
 958                         ret, cam_rect->width, cam_rect->height,
 959                         cam_rect->left, cam_rect->top);
 960                 if (ret < 0 && ret != -ENOIOCTLCMD)
 961                         /* All failed, hopefully resume current capture */
 962                         goto resume_capture;
 963
 964                 /* Finally, adjust the target rectangle */
 965                 if (target.width > cam_rect->width)
 966                         target.width = cam_rect->width;
 967                 if (target.height > cam_rect->height)
 968                         target.height = cam_rect->height;
 969                 if (target.left + target.width > cam_rect->left + cam_rect->width)
 970                         target.left = cam_rect->left + cam_rect->width -
 971                                 target.width;
 972                 if (target.top + target.height > cam_rect->top + cam_rect->height)
 973                         target.top = cam_rect->top + cam_rect->height -
 974                                 target.height;
 975         }
 976
 977         /* We now have a rectangle, larger than requested, let's crop */
 978
 979         /*
 980          * We have to preserve camera rectangle between close() / open(),
 981          * because soc-camera core calls .set_fmt() on each first open() with
 982          * last before last close() _user_ rectangle, which can be different
 983          * from camera rectangle.
 984          */
 985         dev_dbg(icd->dev.parent,
 986                 "SH S_CROP from %ux%u@%u:%u to %ux%u@%u:%u, scale to %ux%u@%u:%u\n",
 987                 cam_rect->width, cam_rect->height, cam_rect->left, cam_rect->top,
 988                 target.width, target.height, target.left, target.top,
 989                 rect->width, rect->height, rect->left, rect->top);
 990
 991         ret = 0;
 992
 993 ceu_set_rect:
 994         cam->camera_rect = *cam_rect;
 995
 996         rect->width     = size_dst(target.width, hscale);
 997         rect->left      = size_dst(target.left, hscale);
 998         rect->height    = size_dst(target.height, vscale);
 999         rect->top       = size_dst(target.top, vscale);
1000
1001         sh_mobile_ceu_set_rect(icd, rect);
1002
1003 resume_capture:
1004         /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
1005         if (pcdev->active)
1006                 capsr |= 1;
1007         capture_restore(pcdev, capsr);
1008
1009         /* Even if only camera cropping succeeded */
1010         return ret;
1011 }
1012
1013 /* Similar to set_crop multistage iterative algorithm */
1014 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1015                                  struct v4l2_format *f)
1016 {
1017         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1018         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1019         struct sh_mobile_ceu_cam *cam = icd->host_priv;
1020         struct v4l2_pix_format *pix = &f->fmt.pix;
1021         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1022         __u32 pixfmt = pix->pixelformat;
1023         const struct soc_camera_format_xlate *xlate;
1024         unsigned int width = pix->width, height = pix->height, tmp_w, tmp_h;
1025         u16 vscale, hscale;
1026         int ret, is_interlaced;
1027
1028         switch (pix->field) {
1029         case V4L2_FIELD_INTERLACED:
1030                 is_interlaced = 1;
1031                 break;
1032         case V4L2_FIELD_ANY:
1033         default:
1034                 pix->field = V4L2_FIELD_NONE;
1035                 /* fall-through */
1036         case V4L2_FIELD_NONE:
1037                 is_interlaced = 0;
1038                 break;
1039         }
1040
1041         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1042         if (!xlate) {
1043                 dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt);
1044                 return -EINVAL;
1045         }
1046
1047         pix->pixelformat = xlate->cam_fmt->fourcc;
1048         ret = v4l2_subdev_call(sd, video, s_fmt, f);
1049         pix->pixelformat = pixfmt;
1050         dev_dbg(icd->dev.parent,
1051                 "Camera %d fmt %ux%u, requested %ux%u, max %ux%u\n",
1052                 ret, pix->width, pix->height, width, height,
1053                 icd->rect_max.width, icd->rect_max.height);
1054         if (ret < 0)
1055                 return ret;
1056
1057         switch (pixfmt) {
1058         case V4L2_PIX_FMT_NV12:
1059         case V4L2_PIX_FMT_NV21:
1060         case V4L2_PIX_FMT_NV16:
1061         case V4L2_PIX_FMT_NV61:
1062                 pcdev->image_mode = 1;
1063                 break;
1064         default:
1065                 pcdev->image_mode = 0;
1066         }
1067
1068         if ((abs(width - pix->width) < 4 && abs(height - pix->height) < 4) ||
1069             !pcdev->image_mode || is_interlaced) {
1070                 hscale = 0;
1071                 vscale = 0;
1072                 goto out;
1073         }
1074
1075         /* Camera set a format, but geometry is not precise, try to improve */
1076         /*
1077          * FIXME: when soc-camera is converted to implement traditional S_FMT
1078          * and S_CROP semantics, replace CEU limits with camera maxima
1079          */
1080         tmp_w = pix->width;
1081         tmp_h = pix->height;
1082         while ((width > tmp_w || height > tmp_h) &&
1083                tmp_w < 2560 && tmp_h < 1920) {
1084                 tmp_w = min(2 * tmp_w, (__u32)2560);
1085                 tmp_h = min(2 * tmp_h, (__u32)1920);
1086                 pix->width = tmp_w;
1087                 pix->height = tmp_h;
1088                 pix->pixelformat = xlate->cam_fmt->fourcc;
1089                 ret = v4l2_subdev_call(sd, video, s_fmt, f);
1090                 pix->pixelformat = pixfmt;
1091                 dev_dbg(icd->dev.parent, "Camera scaled to %ux%u\n",
1092                         pix->width, pix->height);
1093                 if (ret < 0) {
1094                         /* This shouldn't happen */
1095                         dev_err(icd->dev.parent,
1096                                 "Client failed to set format: %d\n", ret);
1097                         return ret;
1098                 }
1099         }
1100
1101         /* We cannot scale up */
1102         if (width > pix->width)
1103                 width = pix->width;
1104
1105         if (height > pix->height)
1106                 height = pix->height;
1107
1108         /* Let's rock: scale pix->{width x height} down to width x height */
1109         hscale = calc_scale(pix->width, &width);
1110         vscale = calc_scale(pix->height, &height);
1111
1112         dev_dbg(icd->dev.parent, "W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1113                 pix->width, hscale, width, pix->height, vscale, height);
1114
1115 out:
1116         pcdev->cflcr = hscale | (vscale << 16);
1117
1118         icd->buswidth = xlate->buswidth;
1119         icd->current_fmt = xlate->host_fmt;
1120         cam->camera_fmt = xlate->cam_fmt;
1121         cam->camera_rect.width = pix->width;
1122         cam->camera_rect.height = pix->height;
1123
1124         icd->rect_max.left = size_dst(cam->camera_max.left, hscale);
1125         icd->rect_max.width = size_dst(cam->camera_max.width, hscale);
1126         icd->rect_max.top = size_dst(cam->camera_max.top, vscale);
1127         icd->rect_max.height = size_dst(cam->camera_max.height, vscale);
1128
1129         icd->rect_current.left = icd->rect_max.left;
1130         icd->rect_current.top = icd->rect_max.top;
1131
1132         pcdev->is_interlaced = is_interlaced;
1133
1134         pix->width = width;
1135         pix->height = height;
1136
1137         return 0;
1138 }
1139
1140 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1141                                  struct v4l2_format *f)
1142 {
1143         const struct soc_camera_format_xlate *xlate;
1144         struct v4l2_pix_format *pix = &f->fmt.pix;
1145         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1146         __u32 pixfmt = pix->pixelformat;
1147         int width, height;
1148         int ret;
1149
1150         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1151         if (!xlate) {
1152                 dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt);
1153                 return -EINVAL;
1154         }
1155
1156         /* FIXME: calculate using depth and bus width */
1157
1158         v4l_bound_align_image(&pix->width, 2, 2560, 1,
1159                               &pix->height, 4, 1920, 2, 0);
1160
1161         width = pix->width;
1162         height = pix->height;
1163
1164         pix->bytesperline = pix->width *
1165                 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
1166         pix->sizeimage = pix->height * pix->bytesperline;
1167
1168         pix->pixelformat = xlate->cam_fmt->fourcc;
1169
1170         /* limit to sensor capabilities */
1171         ret = v4l2_subdev_call(sd, video, try_fmt, f);
1172         pix->pixelformat = pixfmt;
1173         if (ret < 0)
1174                 return ret;
1175
1176         switch (pixfmt) {
1177         case V4L2_PIX_FMT_NV12:
1178         case V4L2_PIX_FMT_NV21:
1179         case V4L2_PIX_FMT_NV16:
1180         case V4L2_PIX_FMT_NV61:
1181                 /* FIXME: check against rect_max after converting soc-camera */
1182                 /* We can scale precisely, need a bigger image from camera */
1183                 if (pix->width < width || pix->height < height) {
1184                         int tmp_w = pix->width, tmp_h = pix->height;
1185                         pix->width = 2560;
1186                         pix->height = 1920;
1187                         ret = v4l2_subdev_call(sd, video, try_fmt, f);
1188                         if (ret < 0) {
1189                                 /* Shouldn't actually happen... */
1190                                 dev_err(icd->dev.parent,
1191                                         "FIXME: try_fmt() returned %d\n", ret);
1192                                 pix->width = tmp_w;
1193                                 pix->height = tmp_h;
1194                         }
1195                 }
1196                 if (pix->width > width)
1197                         pix->width = width;
1198                 if (pix->height > height)
1199                         pix->height = height;
1200         }
1201
1202         return ret;
1203 }
1204
1205 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
1206                                  struct v4l2_requestbuffers *p)
1207 {
1208         int i;
1209
1210         /* This is for locking debugging only. I removed spinlocks and now I
1211          * check whether .prepare is ever called on a linked buffer, or whether
1212          * a dma IRQ can occur for an in-work or unlinked buffer. Until now
1213          * it hadn't triggered */
1214         for (i = 0; i < p->count; i++) {
1215                 struct sh_mobile_ceu_buffer *buf;
1216
1217                 buf = container_of(icf->vb_vidq.bufs[i],
1218                                    struct sh_mobile_ceu_buffer, vb);
1219                 INIT_LIST_HEAD(&buf->vb.queue);
1220         }
1221
1222         return 0;
1223 }
1224
1225 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1226 {
1227         struct soc_camera_file *icf = file->private_data;
1228         struct sh_mobile_ceu_buffer *buf;
1229
1230         buf = list_entry(icf->vb_vidq.stream.next,
1231                          struct sh_mobile_ceu_buffer, vb.stream);
1232
1233         poll_wait(file, &buf->vb.done, pt);
1234
1235         if (buf->vb.state == VIDEOBUF_DONE ||
1236             buf->vb.state == VIDEOBUF_ERROR)
1237                 return POLLIN|POLLRDNORM;
1238
1239         return 0;
1240 }
1241
1242 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1243                                   struct v4l2_capability *cap)
1244 {
1245         strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1246         cap->version = KERNEL_VERSION(0, 0, 5);
1247         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1248         return 0;
1249 }
1250
1251 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
1252                                         struct soc_camera_device *icd)
1253 {
1254         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1255         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1256
1257         videobuf_queue_dma_contig_init(q,
1258                                        &sh_mobile_ceu_videobuf_ops,
1259                                        icd->dev.parent, &pcdev->lock,
1260                                        V4L2_BUF_TYPE_VIDEO_CAPTURE,
1261                                        pcdev->is_interlaced ?
1262                                        V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE,
1263                                        sizeof(struct sh_mobile_ceu_buffer),
1264                                        icd);
1265 }
1266
1267 static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd,
1268                                   struct v4l2_control *ctrl)
1269 {
1270         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1271         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1272         u32 val;
1273
1274         switch (ctrl->id) {
1275         case V4L2_CID_SHARPNESS:
1276                 val = ceu_read(pcdev, CLFCR);
1277                 ctrl->value = val ^ 1;
1278                 return 0;
1279         }
1280         return -ENOIOCTLCMD;
1281 }
1282
1283 static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd,
1284                                   struct v4l2_control *ctrl)
1285 {
1286         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
1287         struct sh_mobile_ceu_dev *pcdev = ici->priv;
1288
1289         switch (ctrl->id) {
1290         case V4L2_CID_SHARPNESS:
1291                 switch (icd->current_fmt->fourcc) {
1292                 case V4L2_PIX_FMT_NV12:
1293                 case V4L2_PIX_FMT_NV21:
1294                 case V4L2_PIX_FMT_NV16:
1295                 case V4L2_PIX_FMT_NV61:
1296                         ceu_write(pcdev, CLFCR, !ctrl->value);
1297                         return 0;
1298                 }
1299                 return -EINVAL;
1300         }
1301         return -ENOIOCTLCMD;
1302 }
1303
1304 static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = {
1305         {
1306                 .id             = V4L2_CID_SHARPNESS,
1307                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
1308                 .name           = "Low-pass filter",
1309                 .minimum        = 0,
1310                 .maximum        = 1,
1311                 .step           = 1,
1312                 .default_value  = 0,
1313         },
1314 };
1315
1316 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
1317         .owner          = THIS_MODULE,
1318         .add            = sh_mobile_ceu_add_device,
1319         .remove         = sh_mobile_ceu_remove_device,
1320         .get_formats    = sh_mobile_ceu_get_formats,
1321         .put_formats    = sh_mobile_ceu_put_formats,
1322         .set_crop       = sh_mobile_ceu_set_crop,
1323         .set_fmt        = sh_mobile_ceu_set_fmt,
1324         .try_fmt        = sh_mobile_ceu_try_fmt,
1325         .set_ctrl       = sh_mobile_ceu_set_ctrl,
1326         .get_ctrl       = sh_mobile_ceu_get_ctrl,
1327         .reqbufs        = sh_mobile_ceu_reqbufs,
1328         .poll           = sh_mobile_ceu_poll,
1329         .querycap       = sh_mobile_ceu_querycap,
1330         .set_bus_param  = sh_mobile_ceu_set_bus_param,
1331         .init_videobuf  = sh_mobile_ceu_init_videobuf,
1332         .controls       = sh_mobile_ceu_controls,
1333         .num_controls   = ARRAY_SIZE(sh_mobile_ceu_controls),
1334 };
1335
1336 static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
1337 {
1338         struct sh_mobile_ceu_dev *pcdev;
1339         struct resource *res;
1340         void __iomem *base;
1341         unsigned int irq;
1342         int err = 0;
1343
1344         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1345         irq = platform_get_irq(pdev, 0);
1346         if (!res || !irq) {
1347                 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
1348                 err = -ENODEV;
1349                 goto exit;
1350         }
1351
1352         pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
1353         if (!pcdev) {
1354                 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1355                 err = -ENOMEM;
1356                 goto exit;
1357         }
1358
1359         INIT_LIST_HEAD(&pcdev->capture);
1360         spin_lock_init(&pcdev->lock);
1361
1362         pcdev->pdata = pdev->dev.platform_data;
1363         if (!pcdev->pdata) {
1364                 err = -EINVAL;
1365                 dev_err(&pdev->dev, "CEU platform data not set.\n");
1366                 goto exit_kfree;
1367         }
1368
1369         base = ioremap_nocache(res->start, resource_size(res));
1370         if (!base) {
1371                 err = -ENXIO;
1372                 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
1373                 goto exit_kfree;
1374         }
1375
1376         pcdev->irq = irq;
1377         pcdev->base = base;
1378         pcdev->video_limit = 0; /* only enabled if second resource exists */
1379
1380         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1381         if (res) {
1382                 err = dma_declare_coherent_memory(&pdev->dev, res->start,
1383                                                   res->start,
1384                                                   resource_size(res),
1385                                                   DMA_MEMORY_MAP |
1386                                                   DMA_MEMORY_EXCLUSIVE);
1387                 if (!err) {
1388                         dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
1389                         err = -ENXIO;
1390                         goto exit_iounmap;
1391                 }
1392
1393                 pcdev->video_limit = resource_size(res);
1394         }
1395
1396         /* request irq */
1397         err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
1398                           dev_name(&pdev->dev), pcdev);
1399         if (err) {
1400                 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
1401                 goto exit_release_mem;
1402         }
1403
1404         pm_suspend_ignore_children(&pdev->dev, true);
1405         pm_runtime_enable(&pdev->dev);
1406         pm_runtime_resume(&pdev->dev);
1407
1408         pcdev->ici.priv = pcdev;
1409         pcdev->ici.v4l2_dev.dev = &pdev->dev;
1410         pcdev->ici.nr = pdev->id;
1411         pcdev->ici.drv_name = dev_name(&pdev->dev);
1412         pcdev->ici.ops = &sh_mobile_ceu_host_ops;
1413
1414         err = soc_camera_host_register(&pcdev->ici);
1415         if (err)
1416                 goto exit_free_irq;
1417
1418         return 0;
1419
1420 exit_free_irq:
1421         free_irq(pcdev->irq, pcdev);
1422 exit_release_mem:
1423         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1424                 dma_release_declared_memory(&pdev->dev);
1425 exit_iounmap:
1426         iounmap(base);
1427 exit_kfree:
1428         kfree(pcdev);
1429 exit:
1430         return err;
1431 }
1432
1433 static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
1434 {
1435         struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1436         struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
1437                                         struct sh_mobile_ceu_dev, ici);
1438
1439         soc_camera_host_unregister(soc_host);
1440         free_irq(pcdev->irq, pcdev);
1441         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1442                 dma_release_declared_memory(&pdev->dev);
1443         iounmap(pcdev->base);
1444         kfree(pcdev);
1445         return 0;
1446 }
1447
1448 static int sh_mobile_ceu_runtime_nop(struct device *dev)
1449 {
1450         /* Runtime PM callback shared between ->runtime_suspend()
1451          * and ->runtime_resume(). Simply returns success.
1452          *
1453          * This driver re-initializes all registers after
1454          * pm_runtime_get_sync() anyway so there is no need
1455          * to save and restore registers here.
1456          */
1457         return 0;
1458 }
1459
1460 static struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
1461         .runtime_suspend = sh_mobile_ceu_runtime_nop,
1462         .runtime_resume = sh_mobile_ceu_runtime_nop,
1463 };
1464
1465 static struct platform_driver sh_mobile_ceu_driver = {
1466         .driver         = {
1467                 .name   = "sh_mobile_ceu",
1468                 .pm     = &sh_mobile_ceu_dev_pm_ops,
1469         },
1470         .probe          = sh_mobile_ceu_probe,
1471         .remove         = __exit_p(sh_mobile_ceu_remove),
1472 };
1473
1474 static int __init sh_mobile_ceu_init(void)
1475 {
1476         return platform_driver_register(&sh_mobile_ceu_driver);
1477 }
1478
1479 static void __exit sh_mobile_ceu_exit(void)
1480 {
1481         platform_driver_unregister(&sh_mobile_ceu_driver);
1482 }
1483
1484 module_init(sh_mobile_ceu_init);
1485 module_exit(sh_mobile_ceu_exit);
1486
1487 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
1488 MODULE_AUTHOR("Magnus Damm");
1489 MODULE_LICENSE("GPL");
1490 MODULE_ALIAS("platform:sh_mobile_ceu");