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->width * icd->height * bytes_per_pixel);
 150
 151         if (0 == *count)
 152                 *count = 2;
 153
 154         if (pcdev->video_limit) {
 155                 while (*size * *count > pcdev->video_limit)
 156                         (*count)--;
 157         }
 158
 159         dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
 160
 161         return 0;
 162 }
 163
 164 static void free_buffer(struct videobuf_queue *vq,
 165                         struct sh_mobile_ceu_buffer *buf)
 166 {
 167         struct soc_camera_device *icd = vq->priv_data;
 168
 169         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 170                 &buf->vb, buf->vb.baddr, buf->vb.bsize);
 171
 172         if (in_interrupt())
 173                 BUG();
 174
 175         videobuf_waiton(&buf->vb, 0, 0);
 176         videobuf_dma_contig_free(vq, &buf->vb);
 177         dev_dbg(&icd->dev, "%s freed\n", __func__);
 178         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 179 }
 180
 181 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
 182 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
 183 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
 184 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
 185
 186
 187 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
 188 {
 189         struct soc_camera_device *icd = pcdev->icd;
 190         dma_addr_t phys_addr_top, phys_addr_bottom;
 191
 192         /* The hardware is _very_ picky about this sequence. Especially
 193          * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
 194          * several not-so-well documented interrupt sources in CETCR.
 195          */
 196         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_CPEIE);
 197         ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC);
 198         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE);
 199         ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
 200         ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
 201
 202         if (!pcdev->active)
 203                 return;
 204
 205         phys_addr_top = videobuf_to_dma_contig(pcdev->active);
 206         ceu_write(pcdev, CDAYR, phys_addr_top);
 207         if (pcdev->is_interlaced) {
 208                 phys_addr_bottom = phys_addr_top + icd->width;
 209                 ceu_write(pcdev, CDBYR, phys_addr_bottom);
 210         }
 211
 212         switch (icd->current_fmt->fourcc) {
 213         case V4L2_PIX_FMT_NV12:
 214         case V4L2_PIX_FMT_NV21:
 215         case V4L2_PIX_FMT_NV16:
 216         case V4L2_PIX_FMT_NV61:
 217                 phys_addr_top += icd->width * icd->height;
 218                 ceu_write(pcdev, CDACR, phys_addr_top);
 219                 if (pcdev->is_interlaced) {
 220                         phys_addr_bottom = phys_addr_top + icd->width;
 221                         ceu_write(pcdev, CDBCR, phys_addr_bottom);
 222                 }
 223         }
 224
 225         pcdev->active->state = VIDEOBUF_ACTIVE;
 226         ceu_write(pcdev, CAPSR, 0x1); /* start capture */
 227 }
 228
 229 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
 230                                           struct videobuf_buffer *vb,
 231                                           enum v4l2_field field)
 232 {
 233         struct soc_camera_device *icd = vq->priv_data;
 234         struct sh_mobile_ceu_buffer *buf;
 235         int ret;
 236
 237         buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
 238
 239         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 240                 vb, vb->baddr, vb->bsize);
 241
 242         /* Added list head initialization on alloc */
 243         WARN_ON(!list_empty(&vb->queue));
 244
 245 #ifdef DEBUG
 246         /* This can be useful if you want to see if we actually fill
 247          * the buffer with something */
 248         memset((void *)vb->baddr, 0xaa, vb->bsize);
 249 #endif
 250
 251         BUG_ON(NULL == icd->current_fmt);
 252
 253         if (buf->fmt    != icd->current_fmt ||
 254             vb->width   != icd->width ||
 255             vb->height  != icd->height ||
 256             vb->field   != field) {
 257                 buf->fmt        = icd->current_fmt;
 258                 vb->width       = icd->width;
 259                 vb->height      = icd->height;
 260                 vb->field       = field;
 261                 vb->state       = VIDEOBUF_NEEDS_INIT;
 262         }
 263
 264         vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
 265         if (0 != vb->baddr && vb->bsize < vb->size) {
 266                 ret = -EINVAL;
 267                 goto out;
 268         }
 269
 270         if (vb->state == VIDEOBUF_NEEDS_INIT) {
 271                 ret = videobuf_iolock(vq, vb, NULL);
 272                 if (ret)
 273                         goto fail;
 274                 vb->state = VIDEOBUF_PREPARED;
 275         }
 276
 277         return 0;
 278 fail:
 279         free_buffer(vq, buf);
 280 out:
 281         return ret;
 282 }
 283
 284 /* Called under spinlock_irqsave(&pcdev->lock, ...) */
 285 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
 286                                          struct videobuf_buffer *vb)
 287 {
 288         struct soc_camera_device *icd = vq->priv_data;
 289         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 290         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 291
 292         dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
 293                 vb, vb->baddr, vb->bsize);
 294
 295         vb->state = VIDEOBUF_QUEUED;
 296         list_add_tail(&vb->queue, &pcdev->capture);
 297
 298         if (!pcdev->active) {
 299                 pcdev->active = vb;
 300                 sh_mobile_ceu_capture(pcdev);
 301         }
 302 }
 303
 304 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
 305                                            struct videobuf_buffer *vb)
 306 {
 307         free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
 308 }
 309
 310 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
 311         .buf_setup      = sh_mobile_ceu_videobuf_setup,
 312         .buf_prepare    = sh_mobile_ceu_videobuf_prepare,
 313         .buf_queue      = sh_mobile_ceu_videobuf_queue,
 314         .buf_release    = sh_mobile_ceu_videobuf_release,
 315 };
 316
 317 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
 318 {
 319         struct sh_mobile_ceu_dev *pcdev = data;
 320         struct videobuf_buffer *vb;
 321         unsigned long flags;
 322
 323         spin_lock_irqsave(&pcdev->lock, flags);
 324
 325         vb = pcdev->active;
 326         list_del_init(&vb->queue);
 327
 328         if (!list_empty(&pcdev->capture))
 329                 pcdev->active = list_entry(pcdev->capture.next,
 330                                            struct videobuf_buffer, queue);
 331         else
 332                 pcdev->active = NULL;
 333
 334         sh_mobile_ceu_capture(pcdev);
 335
 336         vb->state = VIDEOBUF_DONE;
 337         do_gettimeofday(&vb->ts);
 338         vb->field_count++;
 339         wake_up(&vb->done);
 340         spin_unlock_irqrestore(&pcdev->lock, flags);
 341
 342         return IRQ_HANDLED;
 343 }
 344
 345 /* Called with .video_lock held */
 346 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
 347 {
 348         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 349         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 350
 351         if (pcdev->icd)
 352                 return -EBUSY;
 353
 354         dev_info(&icd->dev,
 355                  "SuperH Mobile CEU driver attached to camera %d\n",
 356                  icd->devnum);
 357
 358         clk_enable(pcdev->clk);
 359
 360         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
 361         while (ceu_read(pcdev, CSTSR) & 1)
 362                 msleep(1);
 363
 364         pcdev->icd = icd;
 365
 366         return 0;
 367 }
 368
 369 /* Called with .video_lock held */
 370 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
 371 {
 372         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 373         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 374         unsigned long flags;
 375
 376         BUG_ON(icd != pcdev->icd);
 377
 378         /* disable capture, disable interrupts */
 379         ceu_write(pcdev, CEIER, 0);
 380         ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
 381
 382         /* make sure active buffer is canceled */
 383         spin_lock_irqsave(&pcdev->lock, flags);
 384         if (pcdev->active) {
 385                 list_del(&pcdev->active->queue);
 386                 pcdev->active->state = VIDEOBUF_ERROR;
 387                 wake_up_all(&pcdev->active->done);
 388                 pcdev->active = NULL;
 389         }
 390         spin_unlock_irqrestore(&pcdev->lock, flags);
 391
 392         clk_disable(pcdev->clk);
 393
 394         dev_info(&icd->dev,
 395                  "SuperH Mobile CEU driver detached from camera %d\n",
 396                  icd->devnum);
 397
 398         pcdev->icd = NULL;
 399 }
 400
 401 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
 402                                        __u32 pixfmt)
 403 {
 404         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 405         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 406         int ret, buswidth, width, height, cfszr_width, cdwdr_width;
 407         unsigned long camera_flags, common_flags, value;
 408         int yuv_mode, yuv_lineskip;
 409
 410         camera_flags = icd->ops->query_bus_param(icd);
 411         common_flags = soc_camera_bus_param_compatible(camera_flags,
 412                                                        make_bus_param(pcdev));
 413         if (!common_flags)
 414                 return -EINVAL;
 415
 416         ret = icd->ops->set_bus_param(icd, common_flags);
 417         if (ret < 0)
 418                 return ret;
 419
 420         switch (common_flags & SOCAM_DATAWIDTH_MASK) {
 421         case SOCAM_DATAWIDTH_8:
 422                 buswidth = 8;
 423                 break;
 424         case SOCAM_DATAWIDTH_16:
 425                 buswidth = 16;
 426                 break;
 427         default:
 428                 return -EINVAL;
 429         }
 430
 431         ceu_write(pcdev, CRCNTR, 0);
 432         ceu_write(pcdev, CRCMPR, 0);
 433
 434         value = 0x00000010; /* data fetch by default */
 435         yuv_mode = yuv_lineskip = 0;
 436
 437         switch (icd->current_fmt->fourcc) {
 438         case V4L2_PIX_FMT_NV12:
 439         case V4L2_PIX_FMT_NV21:
 440                 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
 441                 /* fall-through */
 442         case V4L2_PIX_FMT_NV16:
 443         case V4L2_PIX_FMT_NV61:
 444                 yuv_mode = 1;
 445                 switch (pcdev->camera_fmt->fourcc) {
 446                 case V4L2_PIX_FMT_UYVY:
 447                         value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
 448                         break;
 449                 case V4L2_PIX_FMT_VYUY:
 450                         value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
 451                         break;
 452                 case V4L2_PIX_FMT_YUYV:
 453                         value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
 454                         break;
 455                 case V4L2_PIX_FMT_YVYU:
 456                         value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
 457                         break;
 458                 default:
 459                         BUG();
 460                 }
 461         }
 462
 463         if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
 464             icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
 465                 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
 466
 467         value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
 468         value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
 469         value |= buswidth == 16 ? 1 << 12 : 0;
 470         ceu_write(pcdev, CAMCR, value);
 471
 472         ceu_write(pcdev, CAPCR, 0x00300000);
 473         ceu_write(pcdev, CAIFR, pcdev->is_interlaced ? 0x101 : 0);
 474
 475         mdelay(1);
 476
 477         if (yuv_mode) {
 478                 width = icd->width * 2;
 479                 width = buswidth == 16 ? width / 2 : width;
 480                 cfszr_width = cdwdr_width = icd->width;
 481         } else {
 482                 width = icd->width * ((icd->current_fmt->depth + 7) >> 3);
 483                 width = buswidth == 16 ? width / 2 : width;
 484                 cfszr_width = buswidth == 8 ? width / 2 : width;
 485                 cdwdr_width = buswidth == 16 ? width * 2 : width;
 486         }
 487
 488         height = icd->height;
 489         if (pcdev->is_interlaced) {
 490                 height /= 2;
 491                 cdwdr_width *= 2;
 492         }
 493
 494         ceu_write(pcdev, CAMOR, 0);
 495         ceu_write(pcdev, CAPWR, (height << 16) | width);
 496         ceu_write(pcdev, CFLCR, 0); /* no scaling */
 497         ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width);
 498
 499         /* A few words about byte order (observed in Big Endian mode)
 500          *
 501          * In data fetch mode bytes are received in chunks of 8 bytes.
 502          * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
 503          *
 504          * The data is however by default written to memory in reverse order:
 505          * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
 506          *
 507          * The lowest three bits of CDOCR allows us to do swapping,
 508          * using 7 we swap the data bytes to match the incoming order:
 509          * D0, D1, D2, D3, D4, D5, D6, D7
 510          */
 511         value = 0x00000017;
 512         if (yuv_lineskip)
 513                 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
 514
 515         ceu_write(pcdev, CDOCR, value);
 516
 517         ceu_write(pcdev, CDWDR, cdwdr_width);
 518         ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
 519
 520         /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
 521         return 0;
 522 }
 523
 524 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
 525 {
 526         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 527         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 528         unsigned long camera_flags, common_flags;
 529
 530         camera_flags = icd->ops->query_bus_param(icd);
 531         common_flags = soc_camera_bus_param_compatible(camera_flags,
 532                                                        make_bus_param(pcdev));
 533         if (!common_flags)
 534                 return -EINVAL;
 535
 536         return 0;
 537 }
 538
 539 static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
 540         {
 541                 .name           = "NV12",
 542                 .depth          = 12,
 543                 .fourcc         = V4L2_PIX_FMT_NV12,
 544                 .colorspace     = V4L2_COLORSPACE_JPEG,
 545         },
 546         {
 547                 .name           = "NV21",
 548                 .depth          = 12,
 549                 .fourcc         = V4L2_PIX_FMT_NV21,
 550                 .colorspace     = V4L2_COLORSPACE_JPEG,
 551         },
 552         {
 553                 .name           = "NV16",
 554                 .depth          = 16,
 555                 .fourcc         = V4L2_PIX_FMT_NV16,
 556                 .colorspace     = V4L2_COLORSPACE_JPEG,
 557         },
 558         {
 559                 .name           = "NV61",
 560                 .depth          = 16,
 561                 .fourcc         = V4L2_PIX_FMT_NV61,
 562                 .colorspace     = V4L2_COLORSPACE_JPEG,
 563         },
 564 };
 565
 566 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
 567                                      struct soc_camera_format_xlate *xlate)
 568 {
 569         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 570         int ret, k, n;
 571         int formats = 0;
 572
 573         ret = sh_mobile_ceu_try_bus_param(icd);
 574         if (ret < 0)
 575                 return 0;
 576
 577         /* Beginning of a pass */
 578         if (!idx)
 579                 icd->host_priv = NULL;
 580
 581         switch (icd->formats[idx].fourcc) {
 582         case V4L2_PIX_FMT_UYVY:
 583         case V4L2_PIX_FMT_VYUY:
 584         case V4L2_PIX_FMT_YUYV:
 585         case V4L2_PIX_FMT_YVYU:
 586                 if (icd->host_priv)
 587                         goto add_single_format;
 588
 589                 /*
 590                  * Our case is simple so far: for any of the above four camera
 591                  * formats we add all our four synthesized NV* formats, so,
 592                  * just marking the device with a single flag suffices. If
 593                  * the format generation rules are more complex, you would have
 594                  * to actually hang your already added / counted formats onto
 595                  * the host_priv pointer and check whether the format you're
 596                  * going to add now is already there.
 597                  */
 598                 icd->host_priv = (void *)sh_mobile_ceu_formats;
 599
 600                 n = ARRAY_SIZE(sh_mobile_ceu_formats);
 601                 formats += n;
 602                 for (k = 0; xlate && k < n; k++) {
 603                         xlate->host_fmt = &sh_mobile_ceu_formats[k];
 604                         xlate->cam_fmt = icd->formats + idx;
 605                         xlate->buswidth = icd->formats[idx].depth;
 606                         xlate++;
 607                         dev_dbg(ici->v4l2_dev.dev, "Providing format %s using %s\n",
 608                                 sh_mobile_ceu_formats[k].name,
 609                                 icd->formats[idx].name);
 610                 }
 611         default:
 612 add_single_format:
 613                 /* Generic pass-through */
 614                 formats++;
 615                 if (xlate) {
 616                         xlate->host_fmt = icd->formats + idx;
 617                         xlate->cam_fmt = icd->formats + idx;
 618                         xlate->buswidth = icd->formats[idx].depth;
 619                         xlate++;
 620                         dev_dbg(ici->v4l2_dev.dev,
 621                                 "Providing format %s in pass-through mode\n",
 622                                 icd->formats[idx].name);
 623                 }
 624         }
 625
 626         return formats;
 627 }
 628
 629 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
 630                                   struct v4l2_rect *rect)
 631 {
 632         return icd->ops->set_crop(icd, rect);
 633 }
 634
 635 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
 636                                  struct v4l2_format *f)
 637 {
 638         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 639         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 640         __u32 pixfmt = f->fmt.pix.pixelformat;
 641         const struct soc_camera_format_xlate *xlate;
 642         int ret;
 643
 644         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
 645         if (!xlate) {
 646                 dev_warn(ici->v4l2_dev.dev, "Format %x not found\n", pixfmt);
 647                 return -EINVAL;
 648         }
 649
 650         f->fmt.pix.pixelformat = xlate->cam_fmt->fourcc;
 651         ret = v4l2_device_call_until_err(&ici->v4l2_dev, (__u32)icd, video, s_fmt, f);
 652         f->fmt.pix.pixelformat = pixfmt;
 653         if (!ret) {
 654                 icd->buswidth = xlate->buswidth;
 655                 icd->current_fmt = xlate->host_fmt;
 656                 pcdev->camera_fmt = xlate->cam_fmt;
 657         }
 658
 659         return ret;
 660 }
 661
 662 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
 663                                  struct v4l2_format *f)
 664 {
 665         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 666         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 667         const struct soc_camera_format_xlate *xlate;
 668         __u32 pixfmt = f->fmt.pix.pixelformat;
 669         int ret;
 670
 671         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
 672         if (!xlate) {
 673                 dev_warn(ici->v4l2_dev.dev, "Format %x not found\n", pixfmt);
 674                 return -EINVAL;
 675         }
 676
 677         /* FIXME: calculate using depth and bus width */
 678
 679         v4l_bound_align_image(&f->fmt.pix.width, 2, 2560, 1,
 680                               &f->fmt.pix.height, 4, 1920, 2, 0);
 681
 682         f->fmt.pix.bytesperline = f->fmt.pix.width *
 683                 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
 684         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
 685
 686         f->fmt.pix.pixelformat = xlate->cam_fmt->fourcc;
 687
 688         /* limit to sensor capabilities */
 689         ret = v4l2_device_call_until_err(&ici->v4l2_dev, (__u32)icd, video, try_fmt, f);
 690         f->fmt.pix.pixelformat = pixfmt;
 691         if (ret < 0)
 692                 return ret;
 693
 694         switch (f->fmt.pix.field) {
 695         case V4L2_FIELD_INTERLACED:
 696                 pcdev->is_interlaced = 1;
 697                 break;
 698         case V4L2_FIELD_ANY:
 699                 f->fmt.pix.field = V4L2_FIELD_NONE;
 700                 /* fall-through */
 701         case V4L2_FIELD_NONE:
 702                 pcdev->is_interlaced = 0;
 703                 break;
 704         default:
 705                 ret = -EINVAL;
 706                 break;
 707         }
 708
 709         return ret;
 710 }
 711
 712 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
 713                                  struct v4l2_requestbuffers *p)
 714 {
 715         int i;
 716
 717         /* This is for locking debugging only. I removed spinlocks and now I
 718          * check whether .prepare is ever called on a linked buffer, or whether
 719          * a dma IRQ can occur for an in-work or unlinked buffer. Until now
 720          * it hadn't triggered */
 721         for (i = 0; i < p->count; i++) {
 722                 struct sh_mobile_ceu_buffer *buf;
 723
 724                 buf = container_of(icf->vb_vidq.bufs[i],
 725                                    struct sh_mobile_ceu_buffer, vb);
 726                 INIT_LIST_HEAD(&buf->vb.queue);
 727         }
 728
 729         return 0;
 730 }
 731
 732 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
 733 {
 734         struct soc_camera_file *icf = file->private_data;
 735         struct sh_mobile_ceu_buffer *buf;
 736
 737         buf = list_entry(icf->vb_vidq.stream.next,
 738                          struct sh_mobile_ceu_buffer, vb.stream);
 739
 740         poll_wait(file, &buf->vb.done, pt);
 741
 742         if (buf->vb.state == VIDEOBUF_DONE ||
 743             buf->vb.state == VIDEOBUF_ERROR)
 744                 return POLLIN|POLLRDNORM;
 745
 746         return 0;
 747 }
 748
 749 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
 750                                   struct v4l2_capability *cap)
 751 {
 752         strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
 753         cap->version = KERNEL_VERSION(0, 0, 5);
 754         cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 755         return 0;
 756 }
 757
 758 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
 759                                         struct soc_camera_device *icd)
 760 {
 761         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 762         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 763
 764         videobuf_queue_dma_contig_init(q,
 765                                        &sh_mobile_ceu_videobuf_ops,
 766                                        ici->v4l2_dev.dev, &pcdev->lock,
 767                                        V4L2_BUF_TYPE_VIDEO_CAPTURE,
 768                                        pcdev->is_interlaced ?
 769                                        V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE,
 770                                        sizeof(struct sh_mobile_ceu_buffer),
 771                                        icd);
 772 }
 773
 774 static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd,
 775                                   struct v4l2_control *ctrl)
 776 {
 777         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 778         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 779         u32 val;
 780
 781         switch (ctrl->id) {
 782         case V4L2_CID_SHARPNESS:
 783                 val = ceu_read(pcdev, CLFCR);
 784                 ctrl->value = val ^ 1;
 785                 return 0;
 786         }
 787         return -ENOIOCTLCMD;
 788 }
 789
 790 static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd,
 791                                   struct v4l2_control *ctrl)
 792 {
 793         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 794         struct sh_mobile_ceu_dev *pcdev = ici->priv;
 795
 796         switch (ctrl->id) {
 797         case V4L2_CID_SHARPNESS:
 798                 switch (icd->current_fmt->fourcc) {
 799                 case V4L2_PIX_FMT_NV12:
 800                 case V4L2_PIX_FMT_NV21:
 801                 case V4L2_PIX_FMT_NV16:
 802                 case V4L2_PIX_FMT_NV61:
 803                         ceu_write(pcdev, CLFCR, !ctrl->value);
 804                         return 0;
 805                 }
 806                 return -EINVAL;
 807         }
 808         return -ENOIOCTLCMD;
 809 }
 810
 811 static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = {
 812         {
 813                 .id             = V4L2_CID_SHARPNESS,
 814                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
 815                 .name           = "Low-pass filter",
 816                 .minimum        = 0,
 817                 .maximum        = 1,
 818                 .step           = 1,
 819                 .default_value  = 0,
 820         },
 821 };
 822
 823 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
 824         .owner          = THIS_MODULE,
 825         .add            = sh_mobile_ceu_add_device,
 826         .remove         = sh_mobile_ceu_remove_device,
 827         .get_formats    = sh_mobile_ceu_get_formats,
 828         .set_crop       = sh_mobile_ceu_set_crop,
 829         .set_fmt        = sh_mobile_ceu_set_fmt,
 830         .try_fmt        = sh_mobile_ceu_try_fmt,
 831         .set_ctrl       = sh_mobile_ceu_set_ctrl,
 832         .get_ctrl       = sh_mobile_ceu_get_ctrl,
 833         .reqbufs        = sh_mobile_ceu_reqbufs,
 834         .poll           = sh_mobile_ceu_poll,
 835         .querycap       = sh_mobile_ceu_querycap,
 836         .set_bus_param  = sh_mobile_ceu_set_bus_param,
 837         .init_videobuf  = sh_mobile_ceu_init_videobuf,
 838         .controls       = sh_mobile_ceu_controls,
 839         .num_controls   = ARRAY_SIZE(sh_mobile_ceu_controls),
 840 };
 841
 842 static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
 843 {
 844         struct sh_mobile_ceu_dev *pcdev;
 845         struct resource *res;
 846         void __iomem *base;
 847         unsigned int irq;
 848         int err = 0;
 849
 850         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 851         irq = platform_get_irq(pdev, 0);
 852         if (!res || !irq) {
 853                 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
 854                 err = -ENODEV;
 855                 goto exit;
 856         }
 857
 858         pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
 859         if (!pcdev) {
 860                 dev_err(&pdev->dev, "Could not allocate pcdev\n");
 861                 err = -ENOMEM;
 862                 goto exit;
 863         }
 864
 865         INIT_LIST_HEAD(&pcdev->capture);
 866         spin_lock_init(&pcdev->lock);
 867
 868         pcdev->pdata = pdev->dev.platform_data;
 869         if (!pcdev->pdata) {
 870                 err = -EINVAL;
 871                 dev_err(&pdev->dev, "CEU platform data not set.\n");
 872                 goto exit_kfree;
 873         }
 874
 875         base = ioremap_nocache(res->start, resource_size(res));
 876         if (!base) {
 877                 err = -ENXIO;
 878                 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
 879                 goto exit_kfree;
 880         }
 881
 882         pcdev->irq = irq;
 883         pcdev->base = base;
 884         pcdev->video_limit = 0; /* only enabled if second resource exists */
 885
 886         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 887         if (res) {
 888                 err = dma_declare_coherent_memory(&pdev->dev, res->start,
 889                                                   res->start,
 890                                                   resource_size(res),
 891                                                   DMA_MEMORY_MAP |
 892                                                   DMA_MEMORY_EXCLUSIVE);
 893                 if (!err) {
 894                         dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
 895                         err = -ENXIO;
 896                         goto exit_iounmap;
 897                 }
 898
 899                 pcdev->video_limit = resource_size(res);
 900         }
 901
 902         /* request irq */
 903         err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
 904                           dev_name(&pdev->dev), pcdev);
 905         if (err) {
 906                 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
 907                 goto exit_release_mem;
 908         }
 909
 910         pm_suspend_ignore_children(&pdev->dev, true);
 911         pm_runtime_enable(&pdev->dev);
 912         pm_runtime_resume(&pdev->dev);
 913
 914         pcdev->ici.priv = pcdev;
 915         pcdev->ici.v4l2_dev.dev = &pdev->dev;
 916         pcdev->ici.nr = pdev->id;
 917         pcdev->ici.drv_name = dev_name(&pdev->dev);
 918         pcdev->ici.ops = &sh_mobile_ceu_host_ops;
 919
 920         err = soc_camera_host_register(&pcdev->ici);
 921         if (err)
 922                 goto exit_free_irq;
 923
 924         return 0;
 925
 926 exit_free_irq:
 927         free_irq(pcdev->irq, pcdev);
 928 exit_release_mem:
 929         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
 930                 dma_release_declared_memory(&pdev->dev);
 931 exit_iounmap:
 932         iounmap(base);
 933 exit_kfree:
 934         kfree(pcdev);
 935 exit:
 936         return err;
 937 }
 938
 939 static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
 940 {
 941         struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
 942         struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
 943                                         struct sh_mobile_ceu_dev, ici);
 944
 945         soc_camera_host_unregister(soc_host);
 946         free_irq(pcdev->irq, pcdev);
 947         if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
 948                 dma_release_declared_memory(&pdev->dev);
 949         iounmap(pcdev->base);
 950         kfree(pcdev);
 951         return 0;
 952 }
 953
 954 static int sh_mobile_ceu_runtime_nop(struct device *dev)
 955 {
 956         /* Runtime PM callback shared between ->runtime_suspend()
 957          * and ->runtime_resume(). Simply returns success.
 958          *
 959          * This driver re-initializes all registers after
 960          * pm_runtime_get_sync() anyway so there is no need
 961          * to save and restore registers here.
 962          */
 963         return 0;
 964 }
 965
 966 static struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
 967         .runtime_suspend = sh_mobile_ceu_runtime_nop,
 968         .runtime_resume = sh_mobile_ceu_runtime_nop,
 969 };
 970
 971 static struct platform_driver sh_mobile_ceu_driver = {
 972         .driver         = {
 973                 .name   = "sh_mobile_ceu",
 974                 .pm     = &sh_mobile_ceu_dev_pm_ops,
 975         },
 976         .probe          = sh_mobile_ceu_probe,
 977         .remove         = __exit_p(sh_mobile_ceu_remove),
 978 };
 979
 980 static int __init sh_mobile_ceu_init(void)
 981 {
 982         return platform_driver_register(&sh_mobile_ceu_driver);
 983 }
 984
 985 static void __exit sh_mobile_ceu_exit(void)
 986 {
 987         platform_driver_unregister(&sh_mobile_ceu_driver);
 988 }
 989
 990 module_init(sh_mobile_ceu_init);
 991 module_exit(sh_mobile_ceu_exit);
 992
 993 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
 994 MODULE_AUTHOR("Magnus Damm");
 995 MODULE_LICENSE("GPL");
 996 MODULE_ALIAS("platform:sh_mobile_ceu");