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   1 /*
   2  * SuperH Video Output Unit (VOU) driver
   3  *
   4  * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/dma-mapping.h>
  12 #include <linux/delay.h>
  13 #include <linux/errno.h>
  14 #include <linux/fs.h>
  15 #include <linux/i2c.h>
  16 #include <linux/init.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/kernel.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/pm_runtime.h>
  21 #include <linux/version.h>
  22 #include <linux/videodev2.h>
  23
  24 #include <media/sh_vou.h>
  25 #include <media/v4l2-common.h>
  26 #include <media/v4l2-device.h>
  27 #include <media/v4l2-ioctl.h>
  28 #include <media/v4l2-mediabus.h>
  29 #include <media/videobuf-dma-contig.h>
  30
  31 /* Mirror addresses are not available for all registers */
  32 #define VOUER   0
  33 #define VOUCR   4
  34 #define VOUSTR  8
  35 #define VOUVCR  0xc
  36 #define VOUISR  0x10
  37 #define VOUBCR  0x14
  38 #define VOUDPR  0x18
  39 #define VOUDSR  0x1c
  40 #define VOUVPR  0x20
  41 #define VOUIR   0x24
  42 #define VOUSRR  0x28
  43 #define VOUMSR  0x2c
  44 #define VOUHIR  0x30
  45 #define VOUDFR  0x34
  46 #define VOUAD1R 0x38
  47 #define VOUAD2R 0x3c
  48 #define VOUAIR  0x40
  49 #define VOUSWR  0x44
  50 #define VOURCR  0x48
  51 #define VOURPR  0x50
  52
  53 enum sh_vou_status {
  54         SH_VOU_IDLE,
  55         SH_VOU_INITIALISING,
  56         SH_VOU_RUNNING,
  57 };
  58
  59 #define VOU_MAX_IMAGE_WIDTH     720
  60 #define VOU_MAX_IMAGE_HEIGHT    480
  61
  62 struct sh_vou_device {
  63         struct v4l2_device v4l2_dev;
  64         struct video_device *vdev;
  65         atomic_t use_count;
  66         struct sh_vou_pdata *pdata;
  67         spinlock_t lock;
  68         void __iomem *base;
  69         /* State information */
  70         struct v4l2_pix_format pix;
  71         struct v4l2_rect rect;
  72         struct list_head queue;
  73         v4l2_std_id std;
  74         int pix_idx;
  75         struct videobuf_buffer *active;
  76         enum sh_vou_status status;
  77 };
  78
  79 struct sh_vou_file {
  80         struct videobuf_queue vbq;
  81 };
  82
  83 /* Register access routines for sides A, B and mirror addresses */
  84 static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
  85                                u32 value)
  86 {
  87         __raw_writel(value, vou_dev->base + reg);
  88 }
  89
  90 static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
  91                                 u32 value)
  92 {
  93         __raw_writel(value, vou_dev->base + reg);
  94         __raw_writel(value, vou_dev->base + reg + 0x1000);
  95 }
  96
  97 static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
  98                                u32 value)
  99 {
 100         __raw_writel(value, vou_dev->base + reg + 0x2000);
 101 }
 102
 103 static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
 104 {
 105         return __raw_readl(vou_dev->base + reg);
 106 }
 107
 108 static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
 109                              u32 value, u32 mask)
 110 {
 111         u32 old = __raw_readl(vou_dev->base + reg);
 112
 113         value = (value & mask) | (old & ~mask);
 114         __raw_writel(value, vou_dev->base + reg);
 115 }
 116
 117 static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
 118                              u32 value, u32 mask)
 119 {
 120         sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
 121 }
 122
 123 static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
 124                               u32 value, u32 mask)
 125 {
 126         sh_vou_reg_a_set(vou_dev, reg, value, mask);
 127         sh_vou_reg_b_set(vou_dev, reg, value, mask);
 128 }
 129
 130 struct sh_vou_fmt {
 131         u32             pfmt;
 132         char            *desc;
 133         unsigned char   bpp;
 134         unsigned char   rgb;
 135         unsigned char   yf;
 136         unsigned char   pkf;
 137 };
 138
 139 /* Further pixel formats can be added */
 140 static struct sh_vou_fmt vou_fmt[] = {
 141         {
 142                 .pfmt   = V4L2_PIX_FMT_NV12,
 143                 .bpp    = 12,
 144                 .desc   = "YVU420 planar",
 145                 .yf     = 0,
 146                 .rgb    = 0,
 147         },
 148         {
 149                 .pfmt   = V4L2_PIX_FMT_NV16,
 150                 .bpp    = 16,
 151                 .desc   = "YVYU planar",
 152                 .yf     = 1,
 153                 .rgb    = 0,
 154         },
 155         {
 156                 .pfmt   = V4L2_PIX_FMT_RGB24,
 157                 .bpp    = 24,
 158                 .desc   = "RGB24",
 159                 .pkf    = 2,
 160                 .rgb    = 1,
 161         },
 162         {
 163                 .pfmt   = V4L2_PIX_FMT_RGB565,
 164                 .bpp    = 16,
 165                 .desc   = "RGB565",
 166                 .pkf    = 3,
 167                 .rgb    = 1,
 168         },
 169         {
 170                 .pfmt   = V4L2_PIX_FMT_RGB565X,
 171                 .bpp    = 16,
 172                 .desc   = "RGB565 byteswapped",
 173                 .pkf    = 3,
 174                 .rgb    = 1,
 175         },
 176 };
 177
 178 static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
 179                                  struct videobuf_buffer *vb)
 180 {
 181         dma_addr_t addr1, addr2;
 182
 183         addr1 = videobuf_to_dma_contig(vb);
 184         switch (vou_dev->pix.pixelformat) {
 185         case V4L2_PIX_FMT_NV12:
 186         case V4L2_PIX_FMT_NV16:
 187                 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
 188                 break;
 189         default:
 190                 addr2 = 0;
 191         }
 192
 193         sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
 194         sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
 195 }
 196
 197 static void sh_vou_stream_start(struct sh_vou_device *vou_dev,
 198                                 struct videobuf_buffer *vb)
 199 {
 200         unsigned int row_coeff;
 201 #ifdef __LITTLE_ENDIAN
 202         u32 dataswap = 7;
 203 #else
 204         u32 dataswap = 0;
 205 #endif
 206
 207         switch (vou_dev->pix.pixelformat) {
 208         case V4L2_PIX_FMT_NV12:
 209         case V4L2_PIX_FMT_NV16:
 210                 row_coeff = 1;
 211                 break;
 212         case V4L2_PIX_FMT_RGB565:
 213                 dataswap ^= 1;
 214         case V4L2_PIX_FMT_RGB565X:
 215                 row_coeff = 2;
 216                 break;
 217         case V4L2_PIX_FMT_RGB24:
 218                 row_coeff = 3;
 219                 break;
 220         }
 221
 222         sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
 223         sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
 224         sh_vou_schedule_next(vou_dev, vb);
 225 }
 226
 227 static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 228 {
 229         BUG_ON(in_interrupt());
 230
 231         /* Wait until this buffer is no longer in STATE_QUEUED or STATE_ACTIVE */
 232         videobuf_waiton(vb, 0, 0);
 233         videobuf_dma_contig_free(vq, vb);
 234         vb->state = VIDEOBUF_NEEDS_INIT;
 235 }
 236
 237 /* Locking: caller holds vq->vb_lock mutex */
 238 static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count,
 239                             unsigned int *size)
 240 {
 241         struct video_device *vdev = vq->priv_data;
 242         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
 243
 244         *size = vou_fmt[vou_dev->pix_idx].bpp * vou_dev->pix.width *
 245                 vou_dev->pix.height / 8;
 246
 247         if (*count < 2)
 248                 *count = 2;
 249
 250         /* Taking into account maximum frame size, *count will stay >= 2 */
 251         if (PAGE_ALIGN(*size) * *count > 4 * 1024 * 1024)
 252                 *count = 4 * 1024 * 1024 / PAGE_ALIGN(*size);
 253
 254         dev_dbg(vq->dev, "%s(): count=%d, size=%d\n", __func__, *count, *size);
 255
 256         return 0;
 257 }
 258
 259 /* Locking: caller holds vq->vb_lock mutex */
 260 static int sh_vou_buf_prepare(struct videobuf_queue *vq,
 261                               struct videobuf_buffer *vb,
 262                               enum v4l2_field field)
 263 {
 264         struct video_device *vdev = vq->priv_data;
 265         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
 266         struct v4l2_pix_format *pix = &vou_dev->pix;
 267         int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
 268         int ret;
 269
 270         dev_dbg(vq->dev, "%s()\n", __func__);
 271
 272         if (vb->width   != pix->width ||
 273             vb->height  != pix->height ||
 274             vb->field   != pix->field) {
 275                 vb->width       = pix->width;
 276                 vb->height      = pix->height;
 277                 vb->field       = field;
 278                 if (vb->state != VIDEOBUF_NEEDS_INIT)
 279                         free_buffer(vq, vb);
 280         }
 281
 282         vb->size = vb->height * bytes_per_line;
 283         if (vb->baddr && vb->bsize < vb->size) {
 284                 /* User buffer too small */
 285                 dev_warn(vq->dev, "User buffer too small: [%u] @ %lx\n",
 286                          vb->bsize, vb->baddr);
 287                 return -EINVAL;
 288         }
 289
 290         if (vb->state == VIDEOBUF_NEEDS_INIT) {
 291                 ret = videobuf_iolock(vq, vb, NULL);
 292                 if (ret < 0) {
 293                         dev_warn(vq->dev, "IOLOCK buf-type %d: %d\n",
 294                                  vb->memory, ret);
 295                         return ret;
 296                 }
 297                 vb->state = VIDEOBUF_PREPARED;
 298         }
 299
 300         dev_dbg(vq->dev,
 301                 "%s(): fmt #%d, %u bytes per line, phys 0x%x, type %d, state %d\n",
 302                 __func__, vou_dev->pix_idx, bytes_per_line,
 303                 videobuf_to_dma_contig(vb), vb->memory, vb->state);
 304
 305         return 0;
 306 }
 307
 308 /* Locking: caller holds vq->vb_lock mutex and vq->irqlock spinlock */
 309 static void sh_vou_buf_queue(struct videobuf_queue *vq,
 310                              struct videobuf_buffer *vb)
 311 {
 312         struct video_device *vdev = vq->priv_data;
 313         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
 314
 315         dev_dbg(vq->dev, "%s()\n", __func__);
 316
 317         vb->state = VIDEOBUF_QUEUED;
 318         list_add_tail(&vb->queue, &vou_dev->queue);
 319
 320         if (vou_dev->status == SH_VOU_RUNNING) {
 321                 return;
 322         } else if (!vou_dev->active) {
 323                 vou_dev->active = vb;
 324                 /* Start from side A: we use mirror addresses, so, set B */
 325                 sh_vou_reg_a_write(vou_dev, VOURPR, 1);
 326                 dev_dbg(vq->dev, "%s: first buffer status 0x%x\n", __func__,
 327                         sh_vou_reg_a_read(vou_dev, VOUSTR));
 328                 sh_vou_schedule_next(vou_dev, vb);
 329                 /* Only activate VOU after the second buffer */
 330         } else if (vou_dev->active->queue.next == &vb->queue) {
 331                 /* Second buffer - initialise register side B */
 332                 sh_vou_reg_a_write(vou_dev, VOURPR, 0);
 333                 sh_vou_stream_start(vou_dev, vb);
 334
 335                 /* Register side switching with frame VSYNC */
 336                 sh_vou_reg_a_write(vou_dev, VOURCR, 5);
 337                 dev_dbg(vq->dev, "%s: second buffer status 0x%x\n", __func__,
 338                         sh_vou_reg_a_read(vou_dev, VOUSTR));
 339
 340                 /* Enable End-of-Frame (VSYNC) interrupts */
 341                 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
 342                 /* Two buffers on the queue - activate the hardware */
 343
 344                 vou_dev->status = SH_VOU_RUNNING;
 345                 sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
 346         }
 347 }
 348
 349 static void sh_vou_buf_release(struct videobuf_queue *vq,
 350                                struct videobuf_buffer *vb)
 351 {
 352         struct video_device *vdev = vq->priv_data;
 353         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
 354         unsigned long flags;
 355
 356         dev_dbg(vq->dev, "%s()\n", __func__);
 357
 358         spin_lock_irqsave(&vou_dev->lock, flags);
 359
 360         if (vou_dev->active == vb) {
 361                 /* disable output */
 362                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
 363                 /* ...but the current frame will complete */
 364                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
 365                 vou_dev->active = NULL;
 366         }
 367
 368         if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED)) {
 369                 vb->state = VIDEOBUF_ERROR;
 370                 list_del(&vb->queue);
 371         }
 372
 373         spin_unlock_irqrestore(&vou_dev->lock, flags);
 374
 375         free_buffer(vq, vb);
 376 }
 377
 378 static struct videobuf_queue_ops sh_vou_video_qops = {
 379         .buf_setup      = sh_vou_buf_setup,
 380         .buf_prepare    = sh_vou_buf_prepare,
 381         .buf_queue      = sh_vou_buf_queue,
 382         .buf_release    = sh_vou_buf_release,
 383 };
 384
 385 /* Video IOCTLs */
 386 static int sh_vou_querycap(struct file *file, void  *priv,
 387                            struct v4l2_capability *cap)
 388 {
 389         struct sh_vou_file *vou_file = priv;
 390
 391         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
 392
 393         strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
 394         cap->version = KERNEL_VERSION(0, 1, 0);
 395         cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 396         return 0;
 397 }
 398
 399 /* Enumerate formats, that the device can accept from the user */
 400 static int sh_vou_enum_fmt_vid_out(struct file *file, void  *priv,
 401                                    struct v4l2_fmtdesc *fmt)
 402 {
 403         struct sh_vou_file *vou_file = priv;
 404
 405         if (fmt->index >= ARRAY_SIZE(vou_fmt))
 406                 return -EINVAL;
 407
 408         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
 409
 410         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 411         strlcpy(fmt->description, vou_fmt[fmt->index].desc,
 412                 sizeof(fmt->description));
 413         fmt->pixelformat = vou_fmt[fmt->index].pfmt;
 414
 415         return 0;
 416 }
 417
 418 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
 419                                 struct v4l2_format *fmt)
 420 {
 421         struct video_device *vdev = video_devdata(file);
 422         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
 423
 424         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 425
 426         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 427         fmt->fmt.pix = vou_dev->pix;
 428
 429         return 0;
 430 }
 431
 432 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
 433 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
 434 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
 435 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
 436 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
 437 static const unsigned char vou_scale_v_fld[] = {0, 1};
 438
 439 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
 440                                       int pix_idx, int w_idx, int h_idx)
 441 {
 442         struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
 443         unsigned int black_left, black_top, width_max, height_max,
 444                 frame_in_height, frame_out_height, frame_out_top;
 445         struct v4l2_rect *rect = &vou_dev->rect;
 446         struct v4l2_pix_format *pix = &vou_dev->pix;
 447         u32 vouvcr = 0, dsr_h, dsr_v;
 448
 449         if (vou_dev->std & V4L2_STD_525_60) {
 450                 width_max = 858;
 451                 height_max = 262;
 452         } else {
 453                 width_max = 864;
 454                 height_max = 312;
 455         }
 456
 457         frame_in_height = pix->height / 2;
 458         frame_out_height = rect->height / 2;
 459         frame_out_top = rect->top / 2;
 460
 461         /*
 462          * Cropping scheme: max useful image is 720x480, and the total video
 463          * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
 464          * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
 465          * of which the first 33 / 25 clocks HSYNC must be held active. This
 466          * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
 467          * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
 468          * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
 469          * beyond DSR, specified on the left and top by the VPR register "black
 470          * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
 471          * at 138 / 144 : 20, because that's the HSYNC timing, that our first
 472          * client requires, and that's exactly what leaves us 720 pixels for the
 473          * image; we leave VPR[VVP] at default 20 for now, because the client
 474          * doesn't seem to have any special requirements for it. Otherwise we
 475          * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
 476          * the selected standard, and DPR and DSR are selected according to
 477          * cropping. Q: how does the client detect the first valid line? Does
 478          * HSYNC stay inactive during invalid (black) lines?
 479          */
 480         black_left = width_max - VOU_MAX_IMAGE_WIDTH;
 481         black_top = 20;
 482
 483         dsr_h = rect->width + rect->left;
 484         dsr_v = frame_out_height + frame_out_top;
 485
 486         dev_dbg(vou_dev->v4l2_dev.dev,
 487                 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
 488                 pix->width, frame_in_height, black_left, black_top,
 489                 rect->left, frame_out_top, dsr_h, dsr_v);
 490
 491         /* VOUISR height - half of a frame height in frame mode */
 492         sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
 493         sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
 494         sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
 495         sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
 496
 497         /*
 498          * if necessary, we could set VOUHIR to
 499          * max(black_left + dsr_h, width_max) here
 500          */
 501
 502         if (w_idx)
 503                 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
 504         if (h_idx)
 505                 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
 506
 507         dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
 508
 509         /* To produce a colour bar for testing set bit 23 of VOUVCR */
 510         sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
 511         sh_vou_reg_ab_write(vou_dev, VOUDFR,
 512                             fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
 513 }
 514
 515 struct sh_vou_geometry {
 516         struct v4l2_rect output;
 517         unsigned int in_width;
 518         unsigned int in_height;
 519         int scale_idx_h;
 520         int scale_idx_v;
 521 };
 522
 523 /*
 524  * Find input geometry, that we can use to produce output, closest to the
 525  * requested rectangle, using VOU scaling
 526  */
 527 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
 528 {
 529         /* The compiler cannot know, that best and idx will indeed be set */
 530         unsigned int best_err = UINT_MAX, best = 0, width_max, height_max;
 531         int i, idx = 0;
 532
 533         if (std & V4L2_STD_525_60) {
 534                 width_max = 858;
 535                 height_max = 262;
 536         } else {
 537                 width_max = 864;
 538                 height_max = 312;
 539         }
 540
 541         /* Image width must be a multiple of 4 */
 542         v4l_bound_align_image(&geo->in_width, 0, VOU_MAX_IMAGE_WIDTH, 2,
 543                               &geo->in_height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
 544
 545         /* Select scales to come as close as possible to the output image */
 546         for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
 547                 unsigned int err;
 548                 unsigned int found = geo->output.width * vou_scale_h_den[i] /
 549                         vou_scale_h_num[i];
 550
 551                 if (found > VOU_MAX_IMAGE_WIDTH)
 552                         /* scales increase */
 553                         break;
 554
 555                 err = abs(found - geo->in_width);
 556                 if (err < best_err) {
 557                         best_err = err;
 558                         idx = i;
 559                         best = found;
 560                 }
 561                 if (!err)
 562                         break;
 563         }
 564
 565         geo->in_width = best;
 566         geo->scale_idx_h = idx;
 567
 568         best_err = UINT_MAX;
 569
 570         /* This loop can be replaced with one division */
 571         for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
 572                 unsigned int err;
 573                 unsigned int found = geo->output.height * vou_scale_v_den[i] /
 574                         vou_scale_v_num[i];
 575
 576                 if (found > VOU_MAX_IMAGE_HEIGHT)
 577                         /* scales increase */
 578                         break;
 579
 580                 err = abs(found - geo->in_height);
 581                 if (err < best_err) {
 582                         best_err = err;
 583                         idx = i;
 584                         best = found;
 585                 }
 586                 if (!err)
 587                         break;
 588         }
 589
 590         geo->in_height = best;
 591         geo->scale_idx_v = idx;
 592 }
 593
 594 /*
 595  * Find output geometry, that we can produce, using VOU scaling, closest to
 596  * the requested rectangle
 597  */
 598 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
 599 {
 600         unsigned int best_err = UINT_MAX, best, width_max, height_max;
 601         int i, idx;
 602
 603         if (std & V4L2_STD_525_60) {
 604                 width_max = 858;
 605                 height_max = 262 * 2;
 606         } else {
 607                 width_max = 864;
 608                 height_max = 312 * 2;
 609         }
 610
 611         /* Select scales to come as close as possible to the output image */
 612         for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
 613                 unsigned int err;
 614                 unsigned int found = geo->in_width * vou_scale_h_num[i] /
 615                         vou_scale_h_den[i];
 616
 617                 if (found > VOU_MAX_IMAGE_WIDTH)
 618                         /* scales increase */
 619                         break;
 620
 621                 err = abs(found - geo->output.width);
 622                 if (err < best_err) {
 623                         best_err = err;
 624                         idx = i;
 625                         best = found;
 626                 }
 627                 if (!err)
 628                         break;
 629         }
 630
 631         geo->output.width = best;
 632         geo->scale_idx_h = idx;
 633         if (geo->output.left + best > width_max)
 634                 geo->output.left = width_max - best;
 635
 636         pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
 637                  vou_scale_h_num[idx], vou_scale_h_den[idx], best);
 638
 639         best_err = UINT_MAX;
 640
 641         /* This loop can be replaced with one division */
 642         for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
 643                 unsigned int err;
 644                 unsigned int found = geo->in_height * vou_scale_v_num[i] /
 645                         vou_scale_v_den[i];
 646
 647                 if (found > VOU_MAX_IMAGE_HEIGHT)
 648                         /* scales increase */
 649                         break;
 650
 651                 err = abs(found - geo->output.height);
 652                 if (err < best_err) {
 653                         best_err = err;
 654                         idx = i;
 655                         best = found;
 656                 }
 657                 if (!err)
 658                         break;
 659         }
 660
 661         geo->output.height = best;
 662         geo->scale_idx_v = idx;
 663         if (geo->output.top + best > height_max)
 664                 geo->output.top = height_max - best;
 665
 666         pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
 667                  vou_scale_v_num[idx], vou_scale_v_den[idx], best);
 668 }
 669
 670 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
 671                                 struct v4l2_format *fmt)
 672 {
 673         struct video_device *vdev = video_devdata(file);
 674         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
 675         struct v4l2_pix_format *pix = &fmt->fmt.pix;
 676         int pix_idx;
 677         struct sh_vou_geometry geo;
 678         struct v4l2_mbus_framefmt mbfmt = {
 679                 /* Revisit: is this the correct code? */
 680                 .code = V4L2_MBUS_FMT_YUYV8_2X8_LE,
 681                 .field = V4L2_FIELD_INTERLACED,
 682                 .colorspace = V4L2_COLORSPACE_SMPTE170M,
 683         };
 684         int ret;
 685
 686         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
 687                 vou_dev->rect.width, vou_dev->rect.height,
 688                 pix->width, pix->height);
 689
 690         if (pix->field == V4L2_FIELD_ANY)
 691                 pix->field = V4L2_FIELD_NONE;
 692
 693         if (fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 694             pix->field != V4L2_FIELD_NONE)
 695                 return -EINVAL;
 696
 697         for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
 698                 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
 699                         break;
 700
 701         if (pix_idx == ARRAY_SIZE(vou_fmt))
 702                 return -EINVAL;
 703
 704         /* Image width must be a multiple of 4 */
 705         v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 2,
 706                               &pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
 707
 708         geo.in_width = pix->width;
 709         geo.in_height = pix->height;
 710         geo.output = vou_dev->rect;
 711
 712         vou_adjust_output(&geo, vou_dev->std);
 713
 714         mbfmt.width = geo.output.width;
 715         mbfmt.height = geo.output.height;
 716         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
 717                                          s_mbus_fmt, &mbfmt);
 718         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
 719         if (ret < 0)
 720                 return ret;
 721
 722         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
 723                 geo.output.width, geo.output.height, mbfmt.width, mbfmt.height);
 724
 725         /* Sanity checks */
 726         if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
 727             (unsigned)mbfmt.height > VOU_MAX_IMAGE_HEIGHT ||
 728             mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8_LE)
 729                 return -EIO;
 730
 731         if (mbfmt.width != geo.output.width ||
 732             mbfmt.height != geo.output.height) {
 733                 geo.output.width = mbfmt.width;
 734                 geo.output.height = mbfmt.height;
 735
 736                 vou_adjust_input(&geo, vou_dev->std);
 737         }
 738
 739         /* We tried to preserve output rectangle, but it could have changed */
 740         vou_dev->rect = geo.output;
 741         pix->width = geo.in_width;
 742         pix->height = geo.in_height;
 743
 744         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
 745                 pix->width, pix->height);
 746
 747         vou_dev->pix_idx = pix_idx;
 748
 749         vou_dev->pix = *pix;
 750
 751         sh_vou_configure_geometry(vou_dev, pix_idx,
 752                                   geo.scale_idx_h, geo.scale_idx_v);
 753
 754         return 0;
 755 }
 756
 757 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
 758                                   struct v4l2_format *fmt)
 759 {
 760         struct sh_vou_file *vou_file = priv;
 761         struct v4l2_pix_format *pix = &fmt->fmt.pix;
 762         int i;
 763
 764         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
 765
 766         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 767         pix->field = V4L2_FIELD_NONE;
 768
 769         v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
 770                               &pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
 771
 772         for (i = 0; ARRAY_SIZE(vou_fmt); i++)
 773                 if (vou_fmt[i].pfmt == pix->pixelformat)
 774                         return 0;
 775
 776         pix->pixelformat = vou_fmt[0].pfmt;
 777
 778         return 0;
 779 }
 780
 781 static int sh_vou_reqbufs(struct file *file, void *priv,
 782                           struct v4l2_requestbuffers *req)
 783 {
 784         struct sh_vou_file *vou_file = priv;
 785
 786         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
 787
 788         if (req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 789                 return -EINVAL;
 790
 791         return videobuf_reqbufs(&vou_file->vbq, req);
 792 }
 793
 794 static int sh_vou_querybuf(struct file *file, void *priv,
 795                            struct v4l2_buffer *b)
 796 {
 797         struct sh_vou_file *vou_file = priv;
 798
 799         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
 800
 801         return videobuf_querybuf(&vou_file->vbq, b);
 802 }
 803
 804 static int sh_vou_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 805 {
 806         struct sh_vou_file *vou_file = priv;
 807
 808         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
 809
 810         return videobuf_qbuf(&vou_file->vbq, b);
 811 }
 812
 813 static int sh_vou_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 814 {
 815         struct sh_vou_file *vou_file = priv;
 816
 817         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
 818
 819         return videobuf_dqbuf(&vou_file->vbq, b, file->f_flags & O_NONBLOCK);
 820 }
 821
 822 static int sh_vou_streamon(struct file *file, void *priv,
 823                            enum v4l2_buf_type buftype)
 824 {
 825         struct video_device *vdev = video_devdata(file);
 826         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
 827         struct sh_vou_file *vou_file = priv;
 828         int ret;
 829
 830         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
 831
 832         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
 833                                          video, s_stream, 1);
 834         if (ret < 0 && ret != -ENOIOCTLCMD)
 835                 return ret;
 836
 837         /* This calls our .buf_queue() (== sh_vou_buf_queue) */
 838         return videobuf_streamon(&vou_file->vbq);
 839 }
 840
 841 static int sh_vou_streamoff(struct file *file, void *priv,
 842                             enum v4l2_buf_type buftype)
 843 {
 844         struct video_device *vdev = video_devdata(file);
 845         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
 846         struct sh_vou_file *vou_file = priv;
 847
 848         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
 849
 850         /*
 851          * This calls buf_release from host driver's videobuf_queue_ops for all
 852          * remaining buffers. When the last buffer is freed, stop streaming
 853          */
 854         videobuf_streamoff(&vou_file->vbq);
 855         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, s_stream, 0);
 856
 857         return 0;
 858 }
 859
 860 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
 861 {
 862         switch (bus_fmt) {
 863         default:
 864                 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
 865                            __func__, bus_fmt);
 866         case SH_VOU_BUS_8BIT:
 867                 return 1;
 868         case SH_VOU_BUS_16BIT:
 869                 return 0;
 870         case SH_VOU_BUS_BT656:
 871                 return 3;
 872         }
 873 }
 874
 875 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
 876 {
 877         struct video_device *vdev = video_devdata(file);
 878         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
 879         int ret;
 880
 881         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, *std_id);
 882
 883         if (*std_id & ~vdev->tvnorms)
 884                 return -EINVAL;
 885
 886         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
 887                                          s_std_output, *std_id);
 888         /* Shall we continue, if the subdev doesn't support .s_std_output()? */
 889         if (ret < 0 && ret != -ENOIOCTLCMD)
 890                 return ret;
 891
 892         if (*std_id & V4L2_STD_525_60)
 893                 sh_vou_reg_ab_set(vou_dev, VOUCR,
 894                         sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
 895         else
 896                 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
 897
 898         vou_dev->std = *std_id;
 899
 900         return 0;
 901 }
 902
 903 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
 904 {
 905         struct video_device *vdev = video_devdata(file);
 906         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
 907
 908         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 909
 910         *std = vou_dev->std;
 911
 912         return 0;
 913 }
 914
 915 static int sh_vou_g_crop(struct file *file, void *fh, struct v4l2_crop *a)
 916 {
 917         struct video_device *vdev = video_devdata(file);
 918         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
 919
 920         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 921
 922         a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 923         a->c = vou_dev->rect;
 924
 925         return 0;
 926 }
 927
 928 /* Assume a dull encoder, do all the work ourselves. */
 929 static int sh_vou_s_crop(struct file *file, void *fh, struct v4l2_crop *a)
 930 {
 931         struct video_device *vdev = video_devdata(file);
 932         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
 933         struct v4l2_rect *rect = &a->c;
 934         struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
 935         struct v4l2_pix_format *pix = &vou_dev->pix;
 936         struct sh_vou_geometry geo;
 937         struct v4l2_mbus_framefmt mbfmt = {
 938                 /* Revisit: is this the correct code? */
 939                 .code = V4L2_MBUS_FMT_YUYV8_2X8_LE,
 940                 .field = V4L2_FIELD_INTERLACED,
 941                 .colorspace = V4L2_COLORSPACE_SMPTE170M,
 942         };
 943         int ret;
 944
 945         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u@%u:%u\n", __func__,
 946                 rect->width, rect->height, rect->left, rect->top);
 947
 948         if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 949                 return -EINVAL;
 950
 951         v4l_bound_align_image(&rect->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
 952                               &rect->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
 953
 954         if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
 955                 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
 956
 957         if (rect->height + rect->top > VOU_MAX_IMAGE_HEIGHT)
 958                 rect->top = VOU_MAX_IMAGE_HEIGHT - rect->height;
 959
 960         geo.output = *rect;
 961         geo.in_width = pix->width;
 962         geo.in_height = pix->height;
 963
 964         /* Configure the encoder one-to-one, position at 0, ignore errors */
 965         sd_crop.c.width = geo.output.width;
 966         sd_crop.c.height = geo.output.height;
 967         /*
 968          * We first issue a S_CROP, so that the subsequent S_FMT delivers the
 969          * final encoder configuration.
 970          */
 971         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
 972                                    s_crop, &sd_crop);
 973         mbfmt.width = geo.output.width;
 974         mbfmt.height = geo.output.height;
 975         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
 976                                          s_mbus_fmt, &mbfmt);
 977         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
 978         if (ret < 0)
 979                 return ret;
 980
 981         /* Sanity checks */
 982         if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
 983             (unsigned)mbfmt.height > VOU_MAX_IMAGE_HEIGHT ||
 984             mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8_LE)
 985                 return -EIO;
 986
 987         geo.output.width = mbfmt.width;
 988         geo.output.height = mbfmt.height;
 989
 990         /*
 991          * No down-scaling. According to the API, current call has precedence:
 992          * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
 993          */
 994         vou_adjust_input(&geo, vou_dev->std);
 995
 996         /* We tried to preserve output rectangle, but it could have changed */
 997         vou_dev->rect = geo.output;
 998         pix->width = geo.in_width;
 999         pix->height = geo.in_height;
1000
1001         sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1002                                   geo.scale_idx_h, geo.scale_idx_v);
1003
1004         return 0;
1005 }
1006
1007 /*
1008  * Total field: NTSC 858 x 2 * 262/263, PAL 864 x 2 * 312/313, default rectangle
1009  * is the initial register values, height takes the interlaced format into
1010  * account. The actual image can only go up to 720 x 2 * 240, So, VOUVPR can
1011  * actually only meaningfully contain values <= 720 and <= 240 respectively, and
1012  * not <= 864 and <= 312.
1013  */
1014 static int sh_vou_cropcap(struct file *file, void *priv,
1015                           struct v4l2_cropcap *a)
1016 {
1017         struct sh_vou_file *vou_file = priv;
1018
1019         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1020
1021         a->type                         = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1022         a->bounds.left                  = 0;
1023         a->bounds.top                   = 0;
1024         a->bounds.width                 = VOU_MAX_IMAGE_WIDTH;
1025         a->bounds.height                = VOU_MAX_IMAGE_HEIGHT;
1026         /* Default = max, set VOUDPR = 0, which is not hardware default */
1027         a->defrect.left                 = 0;
1028         a->defrect.top                  = 0;
1029         a->defrect.width                = VOU_MAX_IMAGE_WIDTH;
1030         a->defrect.height               = VOU_MAX_IMAGE_HEIGHT;
1031         a->pixelaspect.numerator        = 1;
1032         a->pixelaspect.denominator      = 1;
1033
1034         return 0;
1035 }
1036
1037 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1038 {
1039         struct sh_vou_device *vou_dev = dev_id;
1040         static unsigned long j;
1041         struct videobuf_buffer *vb;
1042         static int cnt;
1043         static int side;
1044         u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1045         u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1046
1047         if (!(irq_status & 0x300)) {
1048                 if (printk_timed_ratelimit(&j, 500))
1049                         dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1050                                  irq_status);
1051                 return IRQ_NONE;
1052         }
1053
1054         spin_lock(&vou_dev->lock);
1055         if (!vou_dev->active || list_empty(&vou_dev->queue)) {
1056                 if (printk_timed_ratelimit(&j, 500))
1057                         dev_warn(vou_dev->v4l2_dev.dev,
1058                                  "IRQ without active buffer: %x!\n", irq_status);
1059                 /* Just ack: buf_release will disable further interrupts */
1060                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1061                 spin_unlock(&vou_dev->lock);
1062                 return IRQ_HANDLED;
1063         }
1064
1065         masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1066         dev_dbg(vou_dev->v4l2_dev.dev,
1067                 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1068                 irq_status, masked, vou_status, cnt);
1069
1070         cnt++;
1071         side = vou_status & 0x10000;
1072
1073         /* Clear only set interrupts */
1074         sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1075
1076         vb = vou_dev->active;
1077         list_del(&vb->queue);
1078
1079         vb->state = VIDEOBUF_DONE;
1080         do_gettimeofday(&vb->ts);
1081         vb->field_count++;
1082         wake_up(&vb->done);
1083
1084         if (list_empty(&vou_dev->queue)) {
1085                 /* Stop VOU */
1086                 dev_dbg(vou_dev->v4l2_dev.dev, "%s: queue empty after %d\n",
1087                         __func__, cnt);
1088                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
1089                 vou_dev->active = NULL;
1090                 vou_dev->status = SH_VOU_INITIALISING;
1091                 /* Disable End-of-Frame (VSYNC) interrupts */
1092                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
1093                 spin_unlock(&vou_dev->lock);
1094                 return IRQ_HANDLED;
1095         }
1096
1097         vou_dev->active = list_entry(vou_dev->queue.next,
1098                                      struct videobuf_buffer, queue);
1099
1100         if (vou_dev->active->queue.next != &vou_dev->queue) {
1101                 struct videobuf_buffer *new = list_entry(vou_dev->active->queue.next,
1102                                                 struct videobuf_buffer, queue);
1103                 sh_vou_schedule_next(vou_dev, new);
1104         }
1105
1106         spin_unlock(&vou_dev->lock);
1107
1108         return IRQ_HANDLED;
1109 }
1110
1111 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1112 {
1113         struct sh_vou_pdata *pdata = vou_dev->pdata;
1114         u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1115         int i = 100;
1116
1117         /* Disable all IRQs */
1118         sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1119
1120         /* Reset VOU interfaces - registers unaffected */
1121         sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1122         while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1123                 udelay(1);
1124
1125         if (!i)
1126                 return -ETIMEDOUT;
1127
1128         dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1129
1130         if (pdata->flags & SH_VOU_PCLK_FALLING)
1131                 voucr |= 1 << 28;
1132         if (pdata->flags & SH_VOU_HSYNC_LOW)
1133                 voucr |= 1 << 27;
1134         if (pdata->flags & SH_VOU_VSYNC_LOW)
1135                 voucr |= 1 << 26;
1136         sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1137
1138         /* Manual register side switching at first */
1139         sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1140         /* Default - fixed HSYNC length, can be made configurable is required */
1141         sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1142
1143         return 0;
1144 }
1145
1146 /* File operations */
1147 static int sh_vou_open(struct file *file)
1148 {
1149         struct video_device *vdev = video_devdata(file);
1150         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1151         struct sh_vou_file *vou_file = kzalloc(sizeof(struct sh_vou_file),
1152                                                GFP_KERNEL);
1153
1154         if (!vou_file)
1155                 return -ENOMEM;
1156
1157         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1158
1159         file->private_data = vou_file;
1160
1161         if (atomic_inc_return(&vou_dev->use_count) == 1) {
1162                 int ret;
1163                 /* First open */
1164                 vou_dev->status = SH_VOU_INITIALISING;
1165                 pm_runtime_get_sync(vdev->v4l2_dev->dev);
1166                 ret = sh_vou_hw_init(vou_dev);
1167                 if (ret < 0) {
1168                         atomic_dec(&vou_dev->use_count);
1169                         pm_runtime_put(vdev->v4l2_dev->dev);
1170                         vou_dev->status = SH_VOU_IDLE;
1171                         return ret;
1172                 }
1173         }
1174
1175         videobuf_queue_dma_contig_init(&vou_file->vbq, &sh_vou_video_qops,
1176                                        vou_dev->v4l2_dev.dev, &vou_dev->lock,
1177                                        V4L2_BUF_TYPE_VIDEO_OUTPUT,
1178                                        V4L2_FIELD_NONE,
1179                                        sizeof(struct videobuf_buffer), vdev);
1180
1181         return 0;
1182 }
1183
1184 static int sh_vou_release(struct file *file)
1185 {
1186         struct video_device *vdev = video_devdata(file);
1187         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1188         struct sh_vou_file *vou_file = file->private_data;
1189
1190         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1191
1192         if (!atomic_dec_return(&vou_dev->use_count)) {
1193                 /* Last close */
1194                 vou_dev->status = SH_VOU_IDLE;
1195                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1196                 pm_runtime_put(vdev->v4l2_dev->dev);
1197         }
1198
1199         file->private_data = NULL;
1200         kfree(vou_file);
1201
1202         return 0;
1203 }
1204
1205 static int sh_vou_mmap(struct file *file, struct vm_area_struct *vma)
1206 {
1207         struct sh_vou_file *vou_file = file->private_data;
1208
1209         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1210
1211         return videobuf_mmap_mapper(&vou_file->vbq, vma);
1212 }
1213
1214 static unsigned int sh_vou_poll(struct file *file, poll_table *wait)
1215 {
1216         struct sh_vou_file *vou_file = file->private_data;
1217
1218         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1219
1220         return videobuf_poll_stream(file, &vou_file->vbq, wait);
1221 }
1222
1223 static int sh_vou_g_chip_ident(struct file *file, void *fh,
1224                                    struct v4l2_dbg_chip_ident *id)
1225 {
1226         struct video_device *vdev = video_devdata(file);
1227         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1228
1229         return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_chip_ident, id);
1230 }
1231
1232 #ifdef CONFIG_VIDEO_ADV_DEBUG
1233 static int sh_vou_g_register(struct file *file, void *fh,
1234                                  struct v4l2_dbg_register *reg)
1235 {
1236         struct video_device *vdev = video_devdata(file);
1237         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1238
1239         return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_register, reg);
1240 }
1241
1242 static int sh_vou_s_register(struct file *file, void *fh,
1243                                  struct v4l2_dbg_register *reg)
1244 {
1245         struct video_device *vdev = video_devdata(file);
1246         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1247
1248         return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, s_register, reg);
1249 }
1250 #endif
1251
1252 /* sh_vou display ioctl operations */
1253 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1254         .vidioc_querycap                = sh_vou_querycap,
1255         .vidioc_enum_fmt_vid_out        = sh_vou_enum_fmt_vid_out,
1256         .vidioc_g_fmt_vid_out           = sh_vou_g_fmt_vid_out,
1257         .vidioc_s_fmt_vid_out           = sh_vou_s_fmt_vid_out,
1258         .vidioc_try_fmt_vid_out         = sh_vou_try_fmt_vid_out,
1259         .vidioc_reqbufs                 = sh_vou_reqbufs,
1260         .vidioc_querybuf                = sh_vou_querybuf,
1261         .vidioc_qbuf                    = sh_vou_qbuf,
1262         .vidioc_dqbuf                   = sh_vou_dqbuf,
1263         .vidioc_streamon                = sh_vou_streamon,
1264         .vidioc_streamoff               = sh_vou_streamoff,
1265         .vidioc_s_std                   = sh_vou_s_std,
1266         .vidioc_g_std                   = sh_vou_g_std,
1267         .vidioc_cropcap                 = sh_vou_cropcap,
1268         .vidioc_g_crop                  = sh_vou_g_crop,
1269         .vidioc_s_crop                  = sh_vou_s_crop,
1270         .vidioc_g_chip_ident            = sh_vou_g_chip_ident,
1271 #ifdef CONFIG_VIDEO_ADV_DEBUG
1272         .vidioc_g_register              = sh_vou_g_register,
1273         .vidioc_s_register              = sh_vou_s_register,
1274 #endif
1275 };
1276
1277 static const struct v4l2_file_operations sh_vou_fops = {
1278         .owner          = THIS_MODULE,
1279         .open           = sh_vou_open,
1280         .release        = sh_vou_release,
1281         .ioctl          = video_ioctl2,
1282         .mmap           = sh_vou_mmap,
1283         .poll           = sh_vou_poll,
1284 };
1285
1286 static const struct video_device sh_vou_video_template = {
1287         .name           = "sh_vou",
1288         .fops           = &sh_vou_fops,
1289         .ioctl_ops      = &sh_vou_ioctl_ops,
1290         .tvnorms        = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1291         .current_norm   = V4L2_STD_NTSC_M,
1292 };
1293
1294 static int __devinit sh_vou_probe(struct platform_device *pdev)
1295 {
1296         struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1297         struct v4l2_rect *rect;
1298         struct v4l2_pix_format *pix;
1299         struct i2c_adapter *i2c_adap;
1300         struct video_device *vdev;
1301         struct sh_vou_device *vou_dev;
1302         struct resource *reg_res, *region;
1303         struct v4l2_subdev *subdev;
1304         int irq, ret;
1305
1306         reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1307         irq = platform_get_irq(pdev, 0);
1308
1309         if (!vou_pdata || !reg_res || irq <= 0) {
1310                 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1311                 return -ENODEV;
1312         }
1313
1314         vou_dev = kzalloc(sizeof(*vou_dev), GFP_KERNEL);
1315         if (!vou_dev)
1316                 return -ENOMEM;
1317
1318         INIT_LIST_HEAD(&vou_dev->queue);
1319         spin_lock_init(&vou_dev->lock);
1320         atomic_set(&vou_dev->use_count, 0);
1321         vou_dev->pdata = vou_pdata;
1322         vou_dev->status = SH_VOU_IDLE;
1323
1324         rect = &vou_dev->rect;
1325         pix = &vou_dev->pix;
1326
1327         /* Fill in defaults */
1328         vou_dev->std            = sh_vou_video_template.current_norm;
1329         rect->left              = 0;
1330         rect->top               = 0;
1331         rect->width             = VOU_MAX_IMAGE_WIDTH;
1332         rect->height            = VOU_MAX_IMAGE_HEIGHT;
1333         pix->width              = VOU_MAX_IMAGE_WIDTH;
1334         pix->height             = VOU_MAX_IMAGE_HEIGHT;
1335         pix->pixelformat        = V4L2_PIX_FMT_YVYU;
1336         pix->field              = V4L2_FIELD_NONE;
1337         pix->bytesperline       = VOU_MAX_IMAGE_WIDTH * 2;
1338         pix->sizeimage          = VOU_MAX_IMAGE_WIDTH * 2 * VOU_MAX_IMAGE_HEIGHT;
1339         pix->colorspace         = V4L2_COLORSPACE_SMPTE170M;
1340
1341         region = request_mem_region(reg_res->start, resource_size(reg_res),
1342                                     pdev->name);
1343         if (!region) {
1344                 dev_err(&pdev->dev, "VOU region already claimed\n");
1345                 ret = -EBUSY;
1346                 goto ereqmemreg;
1347         }
1348
1349         vou_dev->base = ioremap(reg_res->start, resource_size(reg_res));
1350         if (!vou_dev->base) {
1351                 ret = -ENOMEM;
1352                 goto emap;
1353         }
1354
1355         ret = request_irq(irq, sh_vou_isr, 0, "vou", vou_dev);
1356         if (ret < 0)
1357                 goto ereqirq;
1358
1359         ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1360         if (ret < 0) {
1361                 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1362                 goto ev4l2devreg;
1363         }
1364
1365         /* Allocate memory for video device */
1366         vdev = video_device_alloc();
1367         if (vdev == NULL) {
1368                 ret = -ENOMEM;
1369                 goto evdevalloc;
1370         }
1371
1372         *vdev = sh_vou_video_template;
1373         if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1374                 vdev->tvnorms |= V4L2_STD_PAL;
1375         vdev->v4l2_dev = &vou_dev->v4l2_dev;
1376         vdev->release = video_device_release;
1377
1378         vou_dev->vdev = vdev;
1379         video_set_drvdata(vdev, vou_dev);
1380
1381         pm_runtime_enable(&pdev->dev);
1382         pm_runtime_resume(&pdev->dev);
1383
1384         i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1385         if (!i2c_adap) {
1386                 ret = -ENODEV;
1387                 goto ei2cgadap;
1388         }
1389
1390         ret = sh_vou_hw_init(vou_dev);
1391         if (ret < 0)
1392                 goto ereset;
1393
1394         subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1395                         vou_pdata->module_name, vou_pdata->board_info, NULL);
1396         if (!subdev) {
1397                 ret = -ENOMEM;
1398                 goto ei2cnd;
1399         }
1400
1401         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1402         if (ret < 0)
1403                 goto evregdev;
1404
1405         return 0;
1406
1407 evregdev:
1408 ei2cnd:
1409 ereset:
1410         i2c_put_adapter(i2c_adap);
1411 ei2cgadap:
1412         video_device_release(vdev);
1413         pm_runtime_disable(&pdev->dev);
1414 evdevalloc:
1415         v4l2_device_unregister(&vou_dev->v4l2_dev);
1416 ev4l2devreg:
1417         free_irq(irq, vou_dev);
1418 ereqirq:
1419         iounmap(vou_dev->base);
1420 emap:
1421         release_mem_region(reg_res->start, resource_size(reg_res));
1422 ereqmemreg:
1423         kfree(vou_dev);
1424         return ret;
1425 }
1426
1427 static int __devexit sh_vou_remove(struct platform_device *pdev)
1428 {
1429         int irq = platform_get_irq(pdev, 0);
1430         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1431         struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1432                                                 struct sh_vou_device, v4l2_dev);
1433         struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1434                                             struct v4l2_subdev, list);
1435         struct i2c_client *client = v4l2_get_subdevdata(sd);
1436         struct resource *reg_res;
1437
1438         if (irq > 0)
1439                 free_irq(irq, vou_dev);
1440         pm_runtime_disable(&pdev->dev);
1441         video_unregister_device(vou_dev->vdev);
1442         i2c_put_adapter(client->adapter);
1443         v4l2_device_unregister(&vou_dev->v4l2_dev);
1444         iounmap(vou_dev->base);
1445         reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1446         if (reg_res)
1447                 release_mem_region(reg_res->start, resource_size(reg_res));
1448         kfree(vou_dev);
1449         return 0;
1450 }
1451
1452 static struct platform_driver __refdata sh_vou = {
1453         .remove  = __devexit_p(sh_vou_remove),
1454         .driver  = {
1455                 .name   = "sh-vou",
1456                 .owner  = THIS_MODULE,
1457         },
1458 };
1459
1460 static int __init sh_vou_init(void)
1461 {
1462         return platform_driver_probe(&sh_vou, sh_vou_probe);
1463 }
1464
1465 static void __exit sh_vou_exit(void)
1466 {
1467         platform_driver_unregister(&sh_vou);
1468 }
1469
1470 module_init(sh_vou_init);
1471 module_exit(sh_vou_exit);
1472
1473 MODULE_DESCRIPTION("SuperH VOU driver");
1474 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1475 MODULE_LICENSE("GPL v2");
1476 MODULE_ALIAS("platform:sh-vou");