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