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         int is_interlaced;
  96
  97         struct sh_mobile_ceu_info *pdata;
  98
  99         const struct soc_camera_data_format *camera_fmt;
 100 };
 101
 102 static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
 103 {
 104         unsigned long flags;
 105
 106         flags = SOCAM_MASTER |
 107                 SOCAM_PCLK_SAMPLE_RISING |
 108                 SOCAM_HSYNC_ACTIVE_HIGH |
 109                 SOCAM_HSYNC_ACTIVE_LOW |
 110                 SOCAM_VSYNC_ACTIVE_HIGH |
 111                 SOCAM_VSYNC_ACTIVE_LOW |
 112                 SOCAM_DATA_ACTIVE_HIGH;
 113
 114         if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
 115                 flags |= SOCAM_DATAWIDTH_8;
 116
 117         if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
 118                 flags |= SOCAM_DATAWIDTH_16;
 119
 120         if (flags & SOCAM_DATAWIDTH_MASK)
 121                 return flags;
 122
 123         return 0;
 124 }
 125
 126 static void ceu_write(struct sh_mobile_ceu_dev *priv,
 127                       unsigned long reg_offs, u32 data)
 128 {
 129         iowrite32(data, priv->base + reg_offs);
 130 }
 131
 132 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
 133 {
 134         return ioread32(priv->base + reg_offs);
 135 }
 136
 137 /*
 138  *  Videobuf operations
 139  */
 140 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
 141                                         unsigned int *count,
 142                                         unsigned int *size)
 143 {
 144         struct soc_camera_device *icd = vq->priv_data;
 145         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 146         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 147         int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
 148
 149         *size = PAGE_ALIGN(icd->rect_current.width * icd->rect_current.height *
 150                            bytes_per_pixel);
 151
 152         if (0 == *count)
 153                 *count = 2;
 154
 155         if (pcdev->video_limit) {
 156                 while (*size * *count > pcdev->video_limit)
 157                         (*count)--;
 158         }
 159
 160         dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
 161
 162         return 0;
 163 }
 164
 165 static void free_buffer(struct videobuf_queue *vq,
 166                         struct sh_mobile_ceu_buffer *buf)
 167 {
 168         struct soc_camera_device *icd = vq->priv_data;
 169
 170         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 171                 &buf->vb, buf->vb.baddr, buf->vb.bsize);
 172
 173         if (in_interrupt())
 174                 BUG();
 175
 176         videobuf_waiton(&buf->vb, 0, 0);
 177         videobuf_dma_contig_free(vq, &buf->vb);
 178         dev_dbg(&icd->dev, "%s freed\n", __func__);
 179         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 180 }
 181
 182 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
 183 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
 184 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
 185 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
 186
 187
 188 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
 189 {
 190         struct soc_camera_device *icd = pcdev->icd;
 191         dma_addr_t phys_addr_top, phys_addr_bottom;
 192
 193         /* The hardware is _very_ picky about this sequence. Especially
 194          * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
 195          * several not-so-well documented interrupt sources in CETCR.
 196          */
 197         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_CPEIE);
 198         ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC);
 199         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE);
 200         ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
 201         ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
 202
 203         if (!pcdev->active)
 204                 return;
 205
 206         phys_addr_top = videobuf_to_dma_contig(pcdev->active);
 207         ceu_write(pcdev, CDAYR, phys_addr_top);
 208         if (pcdev->is_interlaced) {
 209                 phys_addr_bottom = phys_addr_top + icd->rect_current.width;
 210                 ceu_write(pcdev, CDBYR, phys_addr_bottom);
 211         }
 212
 213         switch (icd->current_fmt->fourcc) {
 214         case V4L2_PIX_FMT_NV12:
 215         case V4L2_PIX_FMT_NV21:
 216         case V4L2_PIX_FMT_NV16:
 217         case V4L2_PIX_FMT_NV61:
 218                 phys_addr_top += icd->rect_current.width *
 219                         icd->rect_current.height;
 220                 ceu_write(pcdev, CDACR, phys_addr_top);
 221                 if (pcdev->is_interlaced) {
 222                         phys_addr_bottom = phys_addr_top +
 223                                 icd->rect_current.width;
 224                         ceu_write(pcdev, CDBCR, phys_addr_bottom);
 225                 }
 226         }
 227
 228         pcdev->active->state = VIDEOBUF_ACTIVE;
 229         ceu_write(pcdev, CAPSR, 0x1); /* start capture */
 230 }
 231
 232 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
 233                                           struct videobuf_buffer *vb,
 234                                           enum v4l2_field field)
 235 {
 236         struct soc_camera_device *icd = vq->priv_data;
 237         struct sh_mobile_ceu_buffer *buf;
 238         int ret;
 239
 240         buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
 241
 242         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 243                 vb, vb->baddr, vb->bsize);
 244
 245         /* Added list head initialization on alloc */
 246         WARN_ON(!list_empty(&vb->queue));
 247
 248 #ifdef DEBUG
 249         /* This can be useful if you want to see if we actually fill
 250          * the buffer with something */
 251         memset((void *)vb->baddr, 0xaa, vb->bsize);
 252 #endif
 253
 254         BUG_ON(NULL == icd->current_fmt);
 255
 256         if (buf->fmt    != icd->current_fmt ||
 257             vb->width   != icd->rect_current.width ||
 258             vb->height  != icd->rect_current.height ||
 259             vb->field   != field) {
 260                 buf->fmt        = icd->current_fmt;
 261                 vb->width       = icd->rect_current.width;
 262                 vb->height      = icd->rect_current.height;
 263                 vb->field       = field;
 264                 vb->state       = VIDEOBUF_NEEDS_INIT;
 265         }
 266
 267         vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
 268         if (0 != vb->baddr && vb->bsize < vb->size) {
 269                 ret = -EINVAL;
 270                 goto out;
 271         }
 272
 273         if (vb->state == VIDEOBUF_NEEDS_INIT) {
 274                 ret = videobuf_iolock(vq, vb, NULL);
 275                 if (ret)
 276                         goto fail;
 277                 vb->state = VIDEOBUF_PREPARED;
 278         }
 279
 280         return 0;
 281 fail:
 282         free_buffer(vq, buf);
 283 out:
 284         return ret;
 285 }
 286
 287 /* Called under spinlock_irqsave(&pcdev->lock, ...) */
 288 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
 289                                          struct videobuf_buffer *vb)
 290 {
 291         struct soc_camera_device *icd = vq->priv_data;
 292         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 293         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 294
 295         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 296                 vb, vb->baddr, vb->bsize);
 297
 298         vb->state = VIDEOBUF_QUEUED;
 299         list_add_tail(&vb->queue, &pcdev->capture);
 300
 301         if (!pcdev->active) {
 302                 pcdev->active = vb;
 303                 sh_mobile_ceu_capture(pcdev);
 304         }
 305 }
 306
 307 static void sh_mobile_ceu_videobuf_release(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         unsigned long flags;
 314
 315         spin_lock_irqsave(&pcdev->lock, flags);
 316
 317         if (pcdev->active == vb) {
 318                 /* disable capture (release DMA buffer), reset */
 319                 ceu_write(pcdev, CAPSR, 1 << 16);
 320                 pcdev->active = NULL;
 321         }
 322
 323         if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) &&
 324             !list_empty(&vb->queue)) {
 325                 vb->state = VIDEOBUF_ERROR;
 326                 list_del_init(&vb->queue);
 327         }
 328
 329         spin_unlock_irqrestore(&pcdev->lock, flags);
 330
 331         free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
 332 }
 333
 334 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
 335         .buf_setup      = sh_mobile_ceu_videobuf_setup,
 336         .buf_prepare    = sh_mobile_ceu_videobuf_prepare,
 337         .buf_queue      = sh_mobile_ceu_videobuf_queue,
 338         .buf_release    = sh_mobile_ceu_videobuf_release,
 339 };
 340
 341 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
 342 {
 343         struct sh_mobile_ceu_dev *pcdev = data;
 344         struct videobuf_buffer *vb;
 345         unsigned long flags;
 346
 347         spin_lock_irqsave(&pcdev->lock, flags);
 348
 349         vb = pcdev->active;
 350         if (!vb)
 351                 /* Stale interrupt from a released buffer */
 352                 goto out;
 353
 354         list_del_init(&vb->queue);
 355
 356         if (!list_empty(&pcdev->capture))
 357                 pcdev->active = list_entry(pcdev->capture.next,
 358                                            struct videobuf_buffer, queue);
 359         else
 360                 pcdev->active = NULL;
 361
 362         sh_mobile_ceu_capture(pcdev);
 363
 364         vb->state = VIDEOBUF_DONE;
 365         do_gettimeofday(&vb->ts);
 366         vb->field_count++;
 367         wake_up(&vb->done);
 368
 369 out:
 370         spin_unlock_irqrestore(&pcdev->lock, flags);
 371
 372         return IRQ_HANDLED;
 373 }
 374
 375 /* Called with .video_lock held */
 376 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
 377 {
 378         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 379         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 380
 381         if (pcdev->icd)
 382                 return -EBUSY;
 383
 384         dev_info(&icd->dev,
 385                  "SuperH Mobile CEU driver attached to camera %d\n",
 386                  icd->devnum);
 387
 388         clk_enable(pcdev->clk);
 389
 390         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
 391         while (ceu_read(pcdev, CSTSR) & 1)
 392                 msleep(1);
 393
 394         pcdev->icd = icd;
 395
 396         return 0;
 397 }
 398
 399 /* Called with .video_lock held */
 400 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
 401 {
 402         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 403         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 404         unsigned long flags;
 405
 406         BUG_ON(icd != pcdev->icd);
 407
 408         /* disable capture, disable interrupts */
 409         ceu_write(pcdev, CEIER, 0);
 410         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
 411
 412         /* make sure active buffer is canceled */
 413         spin_lock_irqsave(&pcdev->lock, flags);
 414         if (pcdev->active) {
 415                 list_del(&pcdev->active->queue);
 416                 pcdev->active->state = VIDEOBUF_ERROR;
 417                 wake_up_all(&pcdev->active->done);
 418                 pcdev->active = NULL;
 419         }
 420         spin_unlock_irqrestore(&pcdev->lock, flags);
 421
 422         clk_disable(pcdev->clk);
 423
 424         dev_info(&icd->dev,
 425                  "SuperH Mobile CEU driver detached from camera %d\n",
 426                  icd->devnum);
 427
 428         pcdev->icd = NULL;
 429 }
 430
 431 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
 432                                        __u32 pixfmt)
 433 {
 434         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 435         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 436         int ret, buswidth, width, height, cfszr_width, cdwdr_width;
 437         unsigned long camera_flags, common_flags, value;
 438         int yuv_mode, yuv_lineskip;
 439
 440         camera_flags = icd->ops->query_bus_param(icd);
 441         common_flags = soc_camera_bus_param_compatible(camera_flags,
 442                                                        make_bus_param(pcdev));
 443         if (!common_flags)
 444                 return -EINVAL;
 445
 446         ret = icd->ops->set_bus_param(icd, common_flags);
 447         if (ret < 0)
 448                 return ret;
 449
 450         switch (common_flags & SOCAM_DATAWIDTH_MASK) {
 451         case SOCAM_DATAWIDTH_8:
 452                 buswidth = 8;
 453                 break;
 454         case SOCAM_DATAWIDTH_16:
 455                 buswidth = 16;
 456                 break;
 457         default:
 458                 return -EINVAL;
 459         }
 460
 461         ceu_write(pcdev, CRCNTR, 0);
 462         ceu_write(pcdev, CRCMPR, 0);
 463
 464         value = 0x00000010; /* data fetch by default */
 465         yuv_mode = yuv_lineskip = 0;
 466
 467         switch (icd->current_fmt->fourcc) {
 468         case V4L2_PIX_FMT_NV12:
 469         case V4L2_PIX_FMT_NV21:
 470                 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
 471                 /* fall-through */
 472         case V4L2_PIX_FMT_NV16:
 473         case V4L2_PIX_FMT_NV61:
 474                 yuv_mode = 1;
 475                 switch (pcdev->camera_fmt->fourcc) {
 476                 case V4L2_PIX_FMT_UYVY:
 477                         value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
 478                         break;
 479                 case V4L2_PIX_FMT_VYUY:
 480                         value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
 481                         break;
 482                 case V4L2_PIX_FMT_YUYV:
 483                         value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
 484                         break;
 485                 case V4L2_PIX_FMT_YVYU:
 486                         value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
 487                         break;
 488                 default:
 489                         BUG();
 490                 }
 491         }
 492
 493         if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
 494             icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
 495                 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
 496
 497         value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
 498         value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
 499         value |= buswidth == 16 ? 1 << 12 : 0;
 500         ceu_write(pcdev, CAMCR, value);
 501
 502         ceu_write(pcdev, CAPCR, 0x00300000);
 503         ceu_write(pcdev, CAIFR, pcdev->is_interlaced ? 0x101 : 0);
 504
 505         mdelay(1);
 506
 507         if (yuv_mode) {
 508                 width = icd->rect_current.width * 2;
 509                 width = buswidth == 16 ? width / 2 : width;
 510                 cfszr_width = cdwdr_width = icd->rect_current.width;
 511         } else {
 512                 width = icd->rect_current.width *
 513                         ((icd->current_fmt->depth + 7) >> 3);
 514                 width = buswidth == 16 ? width / 2 : width;
 515                 cfszr_width = buswidth == 8 ? width / 2 : width;
 516                 cdwdr_width = buswidth == 16 ? width * 2 : width;
 517         }
 518
 519         height = icd->rect_current.height;
 520         if (pcdev->is_interlaced) {
 521                 height /= 2;
 522                 cdwdr_width *= 2;
 523         }
 524
 525         ceu_write(pcdev, CAMOR, 0);
 526         ceu_write(pcdev, CAPWR, (height << 16) | width);
 527         ceu_write(pcdev, CFLCR, 0); /* no scaling */
 528         ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width);
 529
 530         /* A few words about byte order (observed in Big Endian mode)
 531          *
 532          * In data fetch mode bytes are received in chunks of 8 bytes.
 533          * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
 534          *
 535          * The data is however by default written to memory in reverse order:
 536          * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
 537          *
 538          * The lowest three bits of CDOCR allows us to do swapping,
 539          * using 7 we swap the data bytes to match the incoming order:
 540          * D0, D1, D2, D3, D4, D5, D6, D7
 541          */
 542         value = 0x00000017;
 543         if (yuv_lineskip)
 544                 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
 545
 546         ceu_write(pcdev, CDOCR, value);
 547
 548         ceu_write(pcdev, CDWDR, cdwdr_width);
 549         ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
 550
 551         /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
 552         return 0;
 553 }
 554
 555 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
 556 {
 557         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 558         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 559         unsigned long camera_flags, common_flags;
 560
 561         camera_flags = icd->ops->query_bus_param(icd);
 562         common_flags = soc_camera_bus_param_compatible(camera_flags,
 563                                                        make_bus_param(pcdev));
 564         if (!common_flags)
 565                 return -EINVAL;
 566
 567         return 0;
 568 }
 569
 570 static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
 571         {
 572                 .name           = "NV12",
 573                 .depth          = 12,
 574                 .fourcc         = V4L2_PIX_FMT_NV12,
 575                 .colorspace     = V4L2_COLORSPACE_JPEG,
 576         },
 577         {
 578                 .name           = "NV21",
 579                 .depth          = 12,
 580                 .fourcc         = V4L2_PIX_FMT_NV21,
 581                 .colorspace     = V4L2_COLORSPACE_JPEG,
 582         },
 583         {
 584                 .name           = "NV16",
 585                 .depth          = 16,
 586                 .fourcc         = V4L2_PIX_FMT_NV16,
 587                 .colorspace     = V4L2_COLORSPACE_JPEG,
 588         },
 589         {
 590                 .name           = "NV61",
 591                 .depth          = 16,
 592                 .fourcc         = V4L2_PIX_FMT_NV61,
 593                 .colorspace     = V4L2_COLORSPACE_JPEG,
 594         },
 595 };
 596
 597 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
 598                                      struct soc_camera_format_xlate *xlate)
 599 {
 600         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 601         int ret, k, n;
 602         int formats = 0;
 603
 604         ret = sh_mobile_ceu_try_bus_param(icd);
 605         if (ret < 0)
 606                 return 0;
 607
 608         /* Beginning of a pass */
 609         if (!idx)
 610                 icd->host_priv = NULL;
 611
 612         switch (icd->formats[idx].fourcc) {
 613         case V4L2_PIX_FMT_UYVY:
 614         case V4L2_PIX_FMT_VYUY:
 615         case V4L2_PIX_FMT_YUYV:
 616         case V4L2_PIX_FMT_YVYU:
 617                 if (icd->host_priv)
 618                         goto add_single_format;
 619
 620                 /*
 621                  * Our case is simple so far: for any of the above four camera
 622                  * formats we add all our four synthesized NV* formats, so,
 623                  * just marking the device with a single flag suffices. If
 624                  * the format generation rules are more complex, you would have
 625                  * to actually hang your already added / counted formats onto
 626                  * the host_priv pointer and check whether the format you're
 627                  * going to add now is already there.
 628                  */
 629                 icd->host_priv = (void *)sh_mobile_ceu_formats;
 630
 631                 n = ARRAY_SIZE(sh_mobile_ceu_formats);
 632                 formats += n;
 633                 for (k = 0; xlate && k < n; k++) {
 634                         xlate->host_fmt = &sh_mobile_ceu_formats[k];
 635                         xlate->cam_fmt = icd->formats + idx;
 636                         xlate->buswidth = icd->formats[idx].depth;
 637                         xlate++;
 638                         dev_dbg(ici->v4l2_dev.dev, "Providing format %s using %s\n",
 639                                 sh_mobile_ceu_formats[k].name,
 640                                 icd->formats[idx].name);
 641                 }
 642         default:
 643 add_single_format:
 644                 /* Generic pass-through */
 645                 formats++;
 646                 if (xlate) {
 647                         xlate->host_fmt = icd->formats + idx;
 648                         xlate->cam_fmt = icd->formats + idx;
 649                         xlate->buswidth = icd->formats[idx].depth;
 650                         xlate++;
 651                         dev_dbg(ici->v4l2_dev.dev,
 652                                 "Providing format %s in pass-through mode\n",
 653                                 icd->formats[idx].name);
 654                 }
 655         }
 656
 657         return formats;
 658 }
 659
 660 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
 661                                   struct v4l2_rect *rect)
 662 {
 663         return icd->ops->set_crop(icd, rect);
 664 }
 665
 666 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
 667                                  struct v4l2_format *f)
 668 {
 669         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 670         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 671         __u32 pixfmt = f->fmt.pix.pixelformat;
 672         const struct soc_camera_format_xlate *xlate;
 673         int ret;
 674
 675         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
 676         if (!xlate) {
 677                 dev_warn(ici->v4l2_dev.dev, "Format %x not found\n", pixfmt);
 678                 return -EINVAL;
 679         }
 680
 681         f->fmt.pix.pixelformat = xlate->cam_fmt->fourcc;
 682         ret = v4l2_device_call_until_err(&ici->v4l2_dev, (__u32)icd, video, s_fmt, f);
 683         f->fmt.pix.pixelformat = pixfmt;
 684         if (!ret) {
 685                 icd->buswidth = xlate->buswidth;
 686                 icd->current_fmt = xlate->host_fmt;
 687                 pcdev->camera_fmt = xlate->cam_fmt;
 688         }
 689
 690         return ret;
 691 }
 692
 693 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
 694                                  struct v4l2_format *f)
 695 {
 696         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 697         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 698         const struct soc_camera_format_xlate *xlate;
 699         __u32 pixfmt = f->fmt.pix.pixelformat;
 700         int ret;
 701
 702         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
 703         if (!xlate) {
 704                 dev_warn(ici->v4l2_dev.dev, "Format %x not found\n", pixfmt);
 705                 return -EINVAL;
 706         }
 707
 708         /* FIXME: calculate using depth and bus width */
 709
 710         v4l_bound_align_image(&f->fmt.pix.width, 2, 2560, 1,
 711                               &f->fmt.pix.height, 4, 1920, 2, 0);
 712
 713         f->fmt.pix.bytesperline = f->fmt.pix.width *
 714                 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
 715         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
 716
 717         f->fmt.pix.pixelformat = xlate->cam_fmt->fourcc;
 718
 719         /* limit to sensor capabilities */
 720         ret = v4l2_device_call_until_err(&ici->v4l2_dev, (__u32)icd, video, try_fmt, f);
 721         f->fmt.pix.pixelformat = pixfmt;
 722         if (ret < 0)
 723                 return ret;
 724
 725         switch (f->fmt.pix.field) {
 726         case V4L2_FIELD_INTERLACED:
 727                 pcdev->is_interlaced = 1;
 728                 break;
 729         case V4L2_FIELD_ANY:
 730                 f->fmt.pix.field = V4L2_FIELD_NONE;
 731                 /* fall-through */
 732         case V4L2_FIELD_NONE:
 733                 pcdev->is_interlaced = 0;
 734                 break;
 735         default:
 736                 ret = -EINVAL;
 737                 break;
 738         }
 739
 740         return ret;
 741 }
 742
 743 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
 744                                  struct v4l2_requestbuffers *p)
 745 {
 746         int i;
 747
 748         /* This is for locking debugging only. I removed spinlocks and now I
 749          * check whether .prepare is ever called on a linked buffer, or whether
 750          * a dma IRQ can occur for an in-work or unlinked buffer. Until now
 751          * it hadn't triggered */
 752         for (i = 0; i < p->count; i++) {
 753                 struct sh_mobile_ceu_buffer *buf;
 754
 755                 buf = container_of(icf->vb_vidq.bufs[i],
 756                                    struct sh_mobile_ceu_buffer, vb);
 757                 INIT_LIST_HEAD(&buf->vb.queue);
 758         }
 759
 760         return 0;
 761 }
 762
 763 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
 764 {
 765         struct soc_camera_file *icf = file->private_data;
 766         struct sh_mobile_ceu_buffer *buf;
 767
 768         buf = list_entry(icf->vb_vidq.stream.next,
 769                          struct sh_mobile_ceu_buffer, vb.stream);
 770
 771         poll_wait(file, &buf->vb.done, pt);
 772
 773         if (buf->vb.state == VIDEOBUF_DONE ||
 774             buf->vb.state == VIDEOBUF_ERROR)
 775                 return POLLIN|POLLRDNORM;
 776
 777         return 0;
 778 }
 779
 780 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
 781                                   struct v4l2_capability *cap)
 782 {
 783         strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
 784         cap->version = KERNEL_VERSION(0, 0, 5);
 785         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 786         return 0;
 787 }
 788
 789 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
 790                                         struct soc_camera_device *icd)
 791 {
 792         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 793         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 794
 795         videobuf_queue_dma_contig_init(q,
 796                                        &sh_mobile_ceu_videobuf_ops,
 797                                        ici->v4l2_dev.dev, &pcdev->lock,
 798                                        V4L2_BUF_TYPE_VIDEO_CAPTURE,
 799                                        pcdev->is_interlaced ?
 800                                        V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE,
 801                                        sizeof(struct sh_mobile_ceu_buffer),
 802                                        icd);
 803 }
 804
 805 static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd,
 806                                   struct v4l2_control *ctrl)
 807 {
 808         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 809         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 810         u32 val;
 811
 812         switch (ctrl->id) {
 813         case V4L2_CID_SHARPNESS:
 814                 val = ceu_read(pcdev, CLFCR);
 815                 ctrl->value = val ^ 1;
 816                 return 0;
 817         }
 818         return -ENOIOCTLCMD;
 819 }
 820
 821 static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd,
 822                                   struct v4l2_control *ctrl)
 823 {
 824         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 825         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 826
 827         switch (ctrl->id) {
 828         case V4L2_CID_SHARPNESS:
 829                 switch (icd->current_fmt->fourcc) {
 830                 case V4L2_PIX_FMT_NV12:
 831                 case V4L2_PIX_FMT_NV21:
 832                 case V4L2_PIX_FMT_NV16:
 833                 case V4L2_PIX_FMT_NV61:
 834                         ceu_write(pcdev, CLFCR, !ctrl->value);
 835                         return 0;
 836                 }
 837                 return -EINVAL;
 838         }
 839         return -ENOIOCTLCMD;
 840 }
 841
 842 static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = {
 843         {
 844                 .id             = V4L2_CID_SHARPNESS,
 845                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
 846                 .name           = "Low-pass filter",
 847                 .minimum        = 0,
 848                 .maximum        = 1,
 849                 .step           = 1,
 850                 .default_value  = 0,
 851         },
 852 };
 853
 854 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
 855         .owner          = THIS_MODULE,
 856         .add            = sh_mobile_ceu_add_device,
 857         .remove         = sh_mobile_ceu_remove_device,
 858         .get_formats    = sh_mobile_ceu_get_formats,
 859         .set_crop       = sh_mobile_ceu_set_crop,
 860         .set_fmt        = sh_mobile_ceu_set_fmt,
 861         .try_fmt        = sh_mobile_ceu_try_fmt,
 862         .set_ctrl       = sh_mobile_ceu_set_ctrl,
 863         .get_ctrl       = sh_mobile_ceu_get_ctrl,
 864         .reqbufs        = sh_mobile_ceu_reqbufs,
 865         .poll           = sh_mobile_ceu_poll,
 866         .querycap       = sh_mobile_ceu_querycap,
 867         .set_bus_param  = sh_mobile_ceu_set_bus_param,
 868         .init_videobuf  = sh_mobile_ceu_init_videobuf,
 869         .controls       = sh_mobile_ceu_controls,
 870         .num_controls   = ARRAY_SIZE(sh_mobile_ceu_controls),
 871 };
 872
 873 static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
 874 {
 875         struct sh_mobile_ceu_dev *pcdev;
 876         struct resource *res;
 877         void __iomem *base;
 878         unsigned int irq;
 879         int err = 0;
 880
 881         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 882         irq = platform_get_irq(pdev, 0);
 883         if (!res || !irq) {
 884                 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
 885                 err = -ENODEV;
 886                 goto exit;
 887         }
 888
 889         pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
 890         if (!pcdev) {
 891                 dev_err(&pdev->dev, "Could not allocate pcdev\n");
 892                 err = -ENOMEM;
 893                 goto exit;
 894         }
 895
 896         INIT_LIST_HEAD(&pcdev->capture);
 897         spin_lock_init(&pcdev->lock);
 898
 899         pcdev->pdata = pdev->dev.platform_data;
 900         if (!pcdev->pdata) {
 901                 err = -EINVAL;
 902                 dev_err(&pdev->dev, "CEU platform data not set.\n");
 903                 goto exit_kfree;
 904         }
 905
 906         base = ioremap_nocache(res->start, resource_size(res));
 907         if (!base) {
 908                 err = -ENXIO;
 909                 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
 910                 goto exit_kfree;
 911         }
 912
 913         pcdev->irq = irq;
 914         pcdev->base = base;
 915         pcdev->video_limit = 0; /* only enabled if second resource exists */
 916
 917         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 918         if (res) {
 919                 err = dma_declare_coherent_memory(&pdev->dev, res->start,
 920                                                   res->start,
 921                                                   resource_size(res),
 922                                                   DMA_MEMORY_MAP |
 923                                                   DMA_MEMORY_EXCLUSIVE);
 924                 if (!err) {
 925                         dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
 926                         err = -ENXIO;
 927                         goto exit_iounmap;
 928                 }
 929
 930                 pcdev->video_limit = resource_size(res);
 931         }
 932
 933         /* request irq */
 934         err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
 935                           dev_name(&pdev->dev), pcdev);
 936         if (err) {
 937                 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
 938                 goto exit_release_mem;
 939         }
 940
 941         pm_suspend_ignore_children(&pdev->dev, true);
 942         pm_runtime_enable(&pdev->dev);
 943         pm_runtime_resume(&pdev->dev);
 944
 945         pcdev->ici.priv = pcdev;
 946         pcdev->ici.v4l2_dev.dev = &pdev->dev;
 947         pcdev->ici.nr = pdev->id;
 948         pcdev->ici.drv_name = dev_name(&pdev->dev);
 949         pcdev->ici.ops = &sh_mobile_ceu_host_ops;
 950
 951         err = soc_camera_host_register(&pcdev->ici);
 952         if (err)
 953                 goto exit_free_irq;
 954
 955         return 0;
 956
 957 exit_free_irq:
 958         free_irq(pcdev->irq, pcdev);
 959 exit_release_mem:
 960         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
 961                 dma_release_declared_memory(&pdev->dev);
 962 exit_iounmap:
 963         iounmap(base);
 964 exit_kfree:
 965         kfree(pcdev);
 966 exit:
 967         return err;
 968 }
 969
 970 static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
 971 {
 972         struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
 973         struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
 974                                         struct sh_mobile_ceu_dev, ici);
 975
 976         soc_camera_host_unregister(soc_host);
 977         free_irq(pcdev->irq, pcdev);
 978         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
 979                 dma_release_declared_memory(&pdev->dev);
 980         iounmap(pcdev->base);
 981         kfree(pcdev);
 982         return 0;
 983 }
 984
 985 static int sh_mobile_ceu_runtime_nop(struct device *dev)
 986 {
 987         /* Runtime PM callback shared between ->runtime_suspend()
 988          * and ->runtime_resume(). Simply returns success.
 989          *
 990          * This driver re-initializes all registers after
 991          * pm_runtime_get_sync() anyway so there is no need
 992          * to save and restore registers here.
 993          */
 994         return 0;
 995 }
 996
 997 static struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
 998         .runtime_suspend = sh_mobile_ceu_runtime_nop,
 999         .runtime_resume = sh_mobile_ceu_runtime_nop,
1000 };
1001
1002 static struct platform_driver sh_mobile_ceu_driver = {
1003         .driver         = {
1004                 .name   = "sh_mobile_ceu",
1005                 .pm     = &sh_mobile_ceu_dev_pm_ops,
1006         },
1007         .probe          = sh_mobile_ceu_probe,
1008         .remove         = __exit_p(sh_mobile_ceu_remove),
1009 };
1010
1011 static int __init sh_mobile_ceu_init(void)
1012 {
1013         return platform_driver_register(&sh_mobile_ceu_driver);
1014 }
1015
1016 static void __exit sh_mobile_ceu_exit(void)
1017 {
1018         platform_driver_unregister(&sh_mobile_ceu_driver);
1019 }
1020
1021 module_init(sh_mobile_ceu_init);
1022 module_exit(sh_mobile_ceu_exit);
1023
1024 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
1025 MODULE_AUTHOR("Magnus Damm");
1026 MODULE_LICENSE("GPL");
1027 MODULE_ALIAS("platform:sh_mobile_ceu");