drivers/media/platform/sh_vou.c

   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/slab.h>
  22 #include <linux/videodev2.h>
  23 #include <linux/module.h>
  24
  25 #include <media/drv-intf/sh_vou.h>
  26 #include <media/v4l2-common.h>
  27 #include <media/v4l2-device.h>
  28 #include <media/v4l2-ioctl.h>
  29 #include <media/v4l2-mediabus.h>
  30 #include <media/videobuf2-v4l2.h>
  31 #include <media/videobuf2-dma-contig.h>
  32
  33 /* Mirror addresses are not available for all registers */
  34 #define VOUER   0
  35 #define VOUCR   4
  36 #define VOUSTR  8
  37 #define VOUVCR  0xc
  38 #define VOUISR  0x10
  39 #define VOUBCR  0x14
  40 #define VOUDPR  0x18
  41 #define VOUDSR  0x1c
  42 #define VOUVPR  0x20
  43 #define VOUIR   0x24
  44 #define VOUSRR  0x28
  45 #define VOUMSR  0x2c
  46 #define VOUHIR  0x30
  47 #define VOUDFR  0x34
  48 #define VOUAD1R 0x38
  49 #define VOUAD2R 0x3c
  50 #define VOUAIR  0x40
  51 #define VOUSWR  0x44
  52 #define VOURCR  0x48
  53 #define VOURPR  0x50
  54
  55 enum sh_vou_status {
  56         SH_VOU_IDLE,
  57         SH_VOU_INITIALISING,
  58         SH_VOU_RUNNING,
  59 };
  60
  61 #define VOU_MIN_IMAGE_WIDTH     16
  62 #define VOU_MAX_IMAGE_WIDTH     720
  63 #define VOU_MIN_IMAGE_HEIGHT    16
  64
  65 struct sh_vou_buffer {
  66         struct vb2_v4l2_buffer vb;
  67         struct list_head list;
  68 };
  69
  70 static inline struct
  71 sh_vou_buffer *to_sh_vou_buffer(struct vb2_v4l2_buffer *vb2)
  72 {
  73         return container_of(vb2, struct sh_vou_buffer, vb);
  74 }
  75
  76 struct sh_vou_device {
  77         struct v4l2_device v4l2_dev;
  78         struct video_device vdev;
  79         struct sh_vou_pdata *pdata;
  80         spinlock_t lock;
  81         void __iomem *base;
  82         /* State information */
  83         struct v4l2_pix_format pix;
  84         struct v4l2_rect rect;
  85         struct list_head buf_list;
  86         v4l2_std_id std;
  87         int pix_idx;
  88         struct vb2_queue queue;
  89         struct vb2_alloc_ctx *alloc_ctx;
  90         struct sh_vou_buffer *active;
  91         enum sh_vou_status status;
  92         unsigned sequence;
  93         struct mutex fop_lock;
  94 };
  95
  96 /* Register access routines for sides A, B and mirror addresses */
  97 static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
  98                                u32 value)
  99 {
 100         __raw_writel(value, vou_dev->base + reg);
 101 }
 102
 103 static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
 104                                 u32 value)
 105 {
 106         __raw_writel(value, vou_dev->base + reg);
 107         __raw_writel(value, vou_dev->base + reg + 0x1000);
 108 }
 109
 110 static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
 111                                u32 value)
 112 {
 113         __raw_writel(value, vou_dev->base + reg + 0x2000);
 114 }
 115
 116 static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
 117 {
 118         return __raw_readl(vou_dev->base + reg);
 119 }
 120
 121 static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
 122                              u32 value, u32 mask)
 123 {
 124         u32 old = __raw_readl(vou_dev->base + reg);
 125
 126         value = (value & mask) | (old & ~mask);
 127         __raw_writel(value, vou_dev->base + reg);
 128 }
 129
 130 static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
 131                              u32 value, u32 mask)
 132 {
 133         sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
 134 }
 135
 136 static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
 137                               u32 value, u32 mask)
 138 {
 139         sh_vou_reg_a_set(vou_dev, reg, value, mask);
 140         sh_vou_reg_b_set(vou_dev, reg, value, mask);
 141 }
 142
 143 struct sh_vou_fmt {
 144         u32             pfmt;
 145         char            *desc;
 146         unsigned char   bpp;
 147         unsigned char   bpl;
 148         unsigned char   rgb;
 149         unsigned char   yf;
 150         unsigned char   pkf;
 151 };
 152
 153 /* Further pixel formats can be added */
 154 static struct sh_vou_fmt vou_fmt[] = {
 155         {
 156                 .pfmt   = V4L2_PIX_FMT_NV12,
 157                 .bpp    = 12,
 158                 .bpl    = 1,
 159                 .desc   = "YVU420 planar",
 160                 .yf     = 0,
 161                 .rgb    = 0,
 162         },
 163         {
 164                 .pfmt   = V4L2_PIX_FMT_NV16,
 165                 .bpp    = 16,
 166                 .bpl    = 1,
 167                 .desc   = "YVYU planar",
 168                 .yf     = 1,
 169                 .rgb    = 0,
 170         },
 171         {
 172                 .pfmt   = V4L2_PIX_FMT_RGB24,
 173                 .bpp    = 24,
 174                 .bpl    = 3,
 175                 .desc   = "RGB24",
 176                 .pkf    = 2,
 177                 .rgb    = 1,
 178         },
 179         {
 180                 .pfmt   = V4L2_PIX_FMT_RGB565,
 181                 .bpp    = 16,
 182                 .bpl    = 2,
 183                 .desc   = "RGB565",
 184                 .pkf    = 3,
 185                 .rgb    = 1,
 186         },
 187         {
 188                 .pfmt   = V4L2_PIX_FMT_RGB565X,
 189                 .bpp    = 16,
 190                 .bpl    = 2,
 191                 .desc   = "RGB565 byteswapped",
 192                 .pkf    = 3,
 193                 .rgb    = 1,
 194         },
 195 };
 196
 197 static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
 198                                  struct vb2_v4l2_buffer *vbuf)
 199 {
 200         dma_addr_t addr1, addr2;
 201
 202         addr1 = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0);
 203         switch (vou_dev->pix.pixelformat) {
 204         case V4L2_PIX_FMT_NV12:
 205         case V4L2_PIX_FMT_NV16:
 206                 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
 207                 break;
 208         default:
 209                 addr2 = 0;
 210         }
 211
 212         sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
 213         sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
 214 }
 215
 216 static void sh_vou_stream_config(struct sh_vou_device *vou_dev)
 217 {
 218         unsigned int row_coeff;
 219 #ifdef __LITTLE_ENDIAN
 220         u32 dataswap = 7;
 221 #else
 222         u32 dataswap = 0;
 223 #endif
 224
 225         switch (vou_dev->pix.pixelformat) {
 226         default:
 227         case V4L2_PIX_FMT_NV12:
 228         case V4L2_PIX_FMT_NV16:
 229                 row_coeff = 1;
 230                 break;
 231         case V4L2_PIX_FMT_RGB565:
 232                 dataswap ^= 1;
 233         case V4L2_PIX_FMT_RGB565X:
 234                 row_coeff = 2;
 235                 break;
 236         case V4L2_PIX_FMT_RGB24:
 237                 row_coeff = 3;
 238                 break;
 239         }
 240
 241         sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
 242         sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
 243 }
 244
 245 /* Locking: caller holds fop_lock mutex */
 246 static int sh_vou_queue_setup(struct vb2_queue *vq,
 247                        unsigned int *nbuffers, unsigned int *nplanes,
 248                        unsigned int sizes[], void *alloc_ctxs[])
 249 {
 250         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
 251         struct v4l2_pix_format *pix = &vou_dev->pix;
 252         int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
 253
 254         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 255
 256         alloc_ctxs[0] = vou_dev->alloc_ctx;
 257         if (*nplanes)
 258                 return sizes[0] < pix->height * bytes_per_line ? -EINVAL : 0;
 259         *nplanes = 1;
 260         sizes[0] = pix->height * bytes_per_line;
 261         return 0;
 262 }
 263
 264 static int sh_vou_buf_prepare(struct vb2_buffer *vb)
 265 {
 266         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
 267         struct v4l2_pix_format *pix = &vou_dev->pix;
 268         unsigned bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
 269         unsigned size = pix->height * bytes_per_line;
 270
 271         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 272
 273         if (vb2_plane_size(vb, 0) < size) {
 274                 /* User buffer too small */
 275                 dev_warn(vou_dev->v4l2_dev.dev, "buffer too small (%lu < %u)\n",
 276                          vb2_plane_size(vb, 0), size);
 277                 return -EINVAL;
 278         }
 279
 280         vb2_set_plane_payload(vb, 0, size);
 281         return 0;
 282 }
 283
 284 /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
 285 static void sh_vou_buf_queue(struct vb2_buffer *vb)
 286 {
 287         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 288         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
 289         struct sh_vou_buffer *shbuf = to_sh_vou_buffer(vbuf);
 290         unsigned long flags;
 291
 292         spin_lock_irqsave(&vou_dev->lock, flags);
 293         list_add_tail(&shbuf->list, &vou_dev->buf_list);
 294         spin_unlock_irqrestore(&vou_dev->lock, flags);
 295 }
 296
 297 static int sh_vou_start_streaming(struct vb2_queue *vq, unsigned int count)
 298 {
 299         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
 300         struct sh_vou_buffer *buf, *node;
 301         int ret;
 302
 303         vou_dev->sequence = 0;
 304         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
 305                                          video, s_stream, 1);
 306         if (ret < 0 && ret != -ENOIOCTLCMD) {
 307                 list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
 308                         vb2_buffer_done(&buf->vb.vb2_buf,
 309                                         VB2_BUF_STATE_QUEUED);
 310                         list_del(&buf->list);
 311                 }
 312                 vou_dev->active = NULL;
 313                 return ret;
 314         }
 315
 316         buf = list_entry(vou_dev->buf_list.next, struct sh_vou_buffer, list);
 317
 318         vou_dev->active = buf;
 319
 320         /* Start from side A: we use mirror addresses, so, set B */
 321         sh_vou_reg_a_write(vou_dev, VOURPR, 1);
 322         dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n",
 323                 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
 324         sh_vou_schedule_next(vou_dev, &buf->vb);
 325
 326         buf = list_entry(buf->list.next, struct sh_vou_buffer, list);
 327
 328         /* Second buffer - initialise register side B */
 329         sh_vou_reg_a_write(vou_dev, VOURPR, 0);
 330         sh_vou_schedule_next(vou_dev, &buf->vb);
 331
 332         /* Register side switching with frame VSYNC */
 333         sh_vou_reg_a_write(vou_dev, VOURCR, 5);
 334
 335         sh_vou_stream_config(vou_dev);
 336         /* Enable End-of-Frame (VSYNC) interrupts */
 337         sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
 338
 339         /* Two buffers on the queue - activate the hardware */
 340         vou_dev->status = SH_VOU_RUNNING;
 341         sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
 342         return 0;
 343 }
 344
 345 static void sh_vou_stop_streaming(struct vb2_queue *vq)
 346 {
 347         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
 348         struct sh_vou_buffer *buf, *node;
 349         unsigned long flags;
 350
 351         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
 352                                          video, s_stream, 0);
 353         /* disable output */
 354         sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
 355         /* ...but the current frame will complete */
 356         sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
 357         msleep(50);
 358         spin_lock_irqsave(&vou_dev->lock, flags);
 359         list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
 360                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 361                 list_del(&buf->list);
 362         }
 363         vou_dev->active = NULL;
 364         spin_unlock_irqrestore(&vou_dev->lock, flags);
 365 }
 366
 367 static struct vb2_ops sh_vou_qops = {
 368         .queue_setup            = sh_vou_queue_setup,
 369         .buf_prepare            = sh_vou_buf_prepare,
 370         .buf_queue              = sh_vou_buf_queue,
 371         .start_streaming        = sh_vou_start_streaming,
 372         .stop_streaming         = sh_vou_stop_streaming,
 373         .wait_prepare           = vb2_ops_wait_prepare,
 374         .wait_finish            = vb2_ops_wait_finish,
 375 };
 376
 377 /* Video IOCTLs */
 378 static int sh_vou_querycap(struct file *file, void  *priv,
 379                            struct v4l2_capability *cap)
 380 {
 381         struct sh_vou_device *vou_dev = video_drvdata(file);
 382
 383         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 384
 385         strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
 386         strlcpy(cap->driver, "sh-vou", sizeof(cap->driver));
 387         strlcpy(cap->bus_info, "platform:sh-vou", sizeof(cap->bus_info));
 388         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE |
 389                            V4L2_CAP_STREAMING;
 390         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 391         return 0;
 392 }
 393
 394 /* Enumerate formats, that the device can accept from the user */
 395 static int sh_vou_enum_fmt_vid_out(struct file *file, void  *priv,
 396                                    struct v4l2_fmtdesc *fmt)
 397 {
 398         struct sh_vou_device *vou_dev = video_drvdata(file);
 399
 400         if (fmt->index >= ARRAY_SIZE(vou_fmt))
 401                 return -EINVAL;
 402
 403         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 404
 405         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 406         strlcpy(fmt->description, vou_fmt[fmt->index].desc,
 407                 sizeof(fmt->description));
 408         fmt->pixelformat = vou_fmt[fmt->index].pfmt;
 409
 410         return 0;
 411 }
 412
 413 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
 414                                 struct v4l2_format *fmt)
 415 {
 416         struct sh_vou_device *vou_dev = video_drvdata(file);
 417
 418         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 419
 420         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 421         fmt->fmt.pix = vou_dev->pix;
 422
 423         return 0;
 424 }
 425
 426 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
 427 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
 428 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
 429 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
 430 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
 431 static const unsigned char vou_scale_v_fld[] = {0, 1};
 432
 433 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
 434                                       int pix_idx, int w_idx, int h_idx)
 435 {
 436         struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
 437         unsigned int black_left, black_top, width_max,
 438                 frame_in_height, frame_out_height, frame_out_top;
 439         struct v4l2_rect *rect = &vou_dev->rect;
 440         struct v4l2_pix_format *pix = &vou_dev->pix;
 441         u32 vouvcr = 0, dsr_h, dsr_v;
 442
 443         if (vou_dev->std & V4L2_STD_525_60) {
 444                 width_max = 858;
 445                 /* height_max = 262; */
 446         } else {
 447                 width_max = 864;
 448                 /* height_max = 312; */
 449         }
 450
 451         frame_in_height = pix->height / 2;
 452         frame_out_height = rect->height / 2;
 453         frame_out_top = rect->top / 2;
 454
 455         /*
 456          * Cropping scheme: max useful image is 720x480, and the total video
 457          * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
 458          * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
 459          * of which the first 33 / 25 clocks HSYNC must be held active. This
 460          * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
 461          * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
 462          * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
 463          * beyond DSR, specified on the left and top by the VPR register "black
 464          * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
 465          * at 138 / 144 : 20, because that's the HSYNC timing, that our first
 466          * client requires, and that's exactly what leaves us 720 pixels for the
 467          * image; we leave VPR[VVP] at default 20 for now, because the client
 468          * doesn't seem to have any special requirements for it. Otherwise we
 469          * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
 470          * the selected standard, and DPR and DSR are selected according to
 471          * cropping. Q: how does the client detect the first valid line? Does
 472          * HSYNC stay inactive during invalid (black) lines?
 473          */
 474         black_left = width_max - VOU_MAX_IMAGE_WIDTH;
 475         black_top = 20;
 476
 477         dsr_h = rect->width + rect->left;
 478         dsr_v = frame_out_height + frame_out_top;
 479
 480         dev_dbg(vou_dev->v4l2_dev.dev,
 481                 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
 482                 pix->width, frame_in_height, black_left, black_top,
 483                 rect->left, frame_out_top, dsr_h, dsr_v);
 484
 485         /* VOUISR height - half of a frame height in frame mode */
 486         sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
 487         sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
 488         sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
 489         sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
 490
 491         /*
 492          * if necessary, we could set VOUHIR to
 493          * max(black_left + dsr_h, width_max) here
 494          */
 495
 496         if (w_idx)
 497                 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
 498         if (h_idx)
 499                 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
 500
 501         dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
 502
 503         /* To produce a colour bar for testing set bit 23 of VOUVCR */
 504         sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
 505         sh_vou_reg_ab_write(vou_dev, VOUDFR,
 506                             fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
 507 }
 508
 509 struct sh_vou_geometry {
 510         struct v4l2_rect output;
 511         unsigned int in_width;
 512         unsigned int in_height;
 513         int scale_idx_h;
 514         int scale_idx_v;
 515 };
 516
 517 /*
 518  * Find input geometry, that we can use to produce output, closest to the
 519  * requested rectangle, using VOU scaling
 520  */
 521 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
 522 {
 523         /* The compiler cannot know, that best and idx will indeed be set */
 524         unsigned int best_err = UINT_MAX, best = 0, img_height_max;
 525         int i, idx = 0;
 526
 527         if (std & V4L2_STD_525_60)
 528                 img_height_max = 480;
 529         else
 530                 img_height_max = 576;
 531
 532         /* Image width must be a multiple of 4 */
 533         v4l_bound_align_image(&geo->in_width,
 534                               VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
 535                               &geo->in_height,
 536                               VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
 537
 538         /* Select scales to come as close as possible to the output image */
 539         for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
 540                 unsigned int err;
 541                 unsigned int found = geo->output.width * vou_scale_h_den[i] /
 542                         vou_scale_h_num[i];
 543
 544                 if (found > VOU_MAX_IMAGE_WIDTH)
 545                         /* scales increase */
 546                         break;
 547
 548                 err = abs(found - geo->in_width);
 549                 if (err < best_err) {
 550                         best_err = err;
 551                         idx = i;
 552                         best = found;
 553                 }
 554                 if (!err)
 555                         break;
 556         }
 557
 558         geo->in_width = best;
 559         geo->scale_idx_h = idx;
 560
 561         best_err = UINT_MAX;
 562
 563         /* This loop can be replaced with one division */
 564         for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
 565                 unsigned int err;
 566                 unsigned int found = geo->output.height * vou_scale_v_den[i] /
 567                         vou_scale_v_num[i];
 568
 569                 if (found > img_height_max)
 570                         /* scales increase */
 571                         break;
 572
 573                 err = abs(found - geo->in_height);
 574                 if (err < best_err) {
 575                         best_err = err;
 576                         idx = i;
 577                         best = found;
 578                 }
 579                 if (!err)
 580                         break;
 581         }
 582
 583         geo->in_height = best;
 584         geo->scale_idx_v = idx;
 585 }
 586
 587 /*
 588  * Find output geometry, that we can produce, using VOU scaling, closest to
 589  * the requested rectangle
 590  */
 591 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
 592 {
 593         unsigned int best_err = UINT_MAX, best = geo->in_width,
 594                 width_max, height_max, img_height_max;
 595         int i, idx_h = 0, idx_v = 0;
 596
 597         if (std & V4L2_STD_525_60) {
 598                 width_max = 858;
 599                 height_max = 262 * 2;
 600                 img_height_max = 480;
 601         } else {
 602                 width_max = 864;
 603                 height_max = 312 * 2;
 604                 img_height_max = 576;
 605         }
 606
 607         /* Select scales to come as close as possible to the output image */
 608         for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
 609                 unsigned int err;
 610                 unsigned int found = geo->in_width * vou_scale_h_num[i] /
 611                         vou_scale_h_den[i];
 612
 613                 if (found > VOU_MAX_IMAGE_WIDTH)
 614                         /* scales increase */
 615                         break;
 616
 617                 err = abs(found - geo->output.width);
 618                 if (err < best_err) {
 619                         best_err = err;
 620                         idx_h = i;
 621                         best = found;
 622                 }
 623                 if (!err)
 624                         break;
 625         }
 626
 627         geo->output.width = best;
 628         geo->scale_idx_h = idx_h;
 629         if (geo->output.left + best > width_max)
 630                 geo->output.left = width_max - best;
 631
 632         pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
 633                  vou_scale_h_num[idx_h], vou_scale_h_den[idx_h], best);
 634
 635         best_err = UINT_MAX;
 636
 637         /* This loop can be replaced with one division */
 638         for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
 639                 unsigned int err;
 640                 unsigned int found = geo->in_height * vou_scale_v_num[i] /
 641                         vou_scale_v_den[i];
 642
 643                 if (found > img_height_max)
 644                         /* scales increase */
 645                         break;
 646
 647                 err = abs(found - geo->output.height);
 648                 if (err < best_err) {
 649                         best_err = err;
 650                         idx_v = i;
 651                         best = found;
 652                 }
 653                 if (!err)
 654                         break;
 655         }
 656
 657         geo->output.height = best;
 658         geo->scale_idx_v = idx_v;
 659         if (geo->output.top + best > height_max)
 660                 geo->output.top = height_max - best;
 661
 662         pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
 663                  vou_scale_v_num[idx_v], vou_scale_v_den[idx_v], best);
 664 }
 665
 666 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
 667                                   struct v4l2_format *fmt)
 668 {
 669         struct sh_vou_device *vou_dev = video_drvdata(file);
 670         struct v4l2_pix_format *pix = &fmt->fmt.pix;
 671         unsigned int img_height_max;
 672         int pix_idx;
 673
 674         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 675
 676         pix->field = V4L2_FIELD_INTERLACED;
 677         pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
 678         pix->ycbcr_enc = pix->quantization = 0;
 679
 680         for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
 681                 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
 682                         break;
 683
 684         if (pix_idx == ARRAY_SIZE(vou_fmt))
 685                 return -EINVAL;
 686
 687         if (vou_dev->std & V4L2_STD_525_60)
 688                 img_height_max = 480;
 689         else
 690                 img_height_max = 576;
 691
 692         v4l_bound_align_image(&pix->width,
 693                               VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
 694                               &pix->height,
 695                               VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
 696         pix->bytesperline = pix->width * vou_fmt[pix_idx].bpl;
 697         pix->sizeimage = pix->height * ((pix->width * vou_fmt[pix_idx].bpp) >> 3);
 698
 699         return 0;
 700 }
 701
 702 static int sh_vou_set_fmt_vid_out(struct sh_vou_device *vou_dev,
 703                                 struct v4l2_pix_format *pix)
 704 {
 705         unsigned int img_height_max;
 706         struct sh_vou_geometry geo;
 707         struct v4l2_subdev_format format = {
 708                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 709                 /* Revisit: is this the correct code? */
 710                 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
 711                 .format.field = V4L2_FIELD_INTERLACED,
 712                 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
 713         };
 714         struct v4l2_mbus_framefmt *mbfmt = &format.format;
 715         int pix_idx;
 716         int ret;
 717
 718         if (vb2_is_busy(&vou_dev->queue))
 719                 return -EBUSY;
 720
 721         for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
 722                 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
 723                         break;
 724
 725         geo.in_width = pix->width;
 726         geo.in_height = pix->height;
 727         geo.output = vou_dev->rect;
 728
 729         vou_adjust_output(&geo, vou_dev->std);
 730
 731         mbfmt->width = geo.output.width;
 732         mbfmt->height = geo.output.height;
 733         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
 734                                          set_fmt, NULL, &format);
 735         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
 736         if (ret < 0)
 737                 return ret;
 738
 739         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
 740                 geo.output.width, geo.output.height, mbfmt->width, mbfmt->height);
 741
 742         if (vou_dev->std & V4L2_STD_525_60)
 743                 img_height_max = 480;
 744         else
 745                 img_height_max = 576;
 746
 747         /* Sanity checks */
 748         if ((unsigned)mbfmt->width > VOU_MAX_IMAGE_WIDTH ||
 749             (unsigned)mbfmt->height > img_height_max ||
 750             mbfmt->code != MEDIA_BUS_FMT_YUYV8_2X8)
 751                 return -EIO;
 752
 753         if (mbfmt->width != geo.output.width ||
 754             mbfmt->height != geo.output.height) {
 755                 geo.output.width = mbfmt->width;
 756                 geo.output.height = mbfmt->height;
 757
 758                 vou_adjust_input(&geo, vou_dev->std);
 759         }
 760
 761         /* We tried to preserve output rectangle, but it could have changed */
 762         vou_dev->rect = geo.output;
 763         pix->width = geo.in_width;
 764         pix->height = geo.in_height;
 765
 766         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
 767                 pix->width, pix->height);
 768
 769         vou_dev->pix_idx = pix_idx;
 770
 771         vou_dev->pix = *pix;
 772
 773         sh_vou_configure_geometry(vou_dev, pix_idx,
 774                                   geo.scale_idx_h, geo.scale_idx_v);
 775
 776         return 0;
 777 }
 778
 779 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
 780                                 struct v4l2_format *fmt)
 781 {
 782         struct sh_vou_device *vou_dev = video_drvdata(file);
 783         int ret = sh_vou_try_fmt_vid_out(file, priv, fmt);
 784
 785         if (ret)
 786                 return ret;
 787         return sh_vou_set_fmt_vid_out(vou_dev, &fmt->fmt.pix);
 788 }
 789
 790 static int sh_vou_enum_output(struct file *file, void *fh,
 791                               struct v4l2_output *a)
 792 {
 793         struct sh_vou_device *vou_dev = video_drvdata(file);
 794
 795         if (a->index)
 796                 return -EINVAL;
 797         strlcpy(a->name, "Video Out", sizeof(a->name));
 798         a->type = V4L2_OUTPUT_TYPE_ANALOG;
 799         a->std = vou_dev->vdev.tvnorms;
 800         return 0;
 801 }
 802
 803 static int sh_vou_g_output(struct file *file, void *fh, unsigned int *i)
 804 {
 805         *i = 0;
 806         return 0;
 807 }
 808
 809 static int sh_vou_s_output(struct file *file, void *fh, unsigned int i)
 810 {
 811         return i ? -EINVAL : 0;
 812 }
 813
 814 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
 815 {
 816         switch (bus_fmt) {
 817         default:
 818                 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
 819                            __func__, bus_fmt);
 820         case SH_VOU_BUS_8BIT:
 821                 return 1;
 822         case SH_VOU_BUS_16BIT:
 823                 return 0;
 824         case SH_VOU_BUS_BT656:
 825                 return 3;
 826         }
 827 }
 828
 829 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id)
 830 {
 831         struct sh_vou_device *vou_dev = video_drvdata(file);
 832         int ret;
 833
 834         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id);
 835
 836         if (std_id == vou_dev->std)
 837                 return 0;
 838
 839         if (vb2_is_busy(&vou_dev->queue))
 840                 return -EBUSY;
 841
 842         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
 843                                          s_std_output, std_id);
 844         /* Shall we continue, if the subdev doesn't support .s_std_output()? */
 845         if (ret < 0 && ret != -ENOIOCTLCMD)
 846                 return ret;
 847
 848         vou_dev->rect.top = vou_dev->rect.left = 0;
 849         vou_dev->rect.width = VOU_MAX_IMAGE_WIDTH;
 850         if (std_id & V4L2_STD_525_60) {
 851                 sh_vou_reg_ab_set(vou_dev, VOUCR,
 852                         sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
 853                 vou_dev->rect.height = 480;
 854         } else {
 855                 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
 856                 vou_dev->rect.height = 576;
 857         }
 858
 859         vou_dev->pix.width = vou_dev->rect.width;
 860         vou_dev->pix.height = vou_dev->rect.height;
 861         vou_dev->pix.bytesperline =
 862                 vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpl;
 863         vou_dev->pix.sizeimage = vou_dev->pix.height *
 864                 ((vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpp) >> 3);
 865         vou_dev->std = std_id;
 866         sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
 867
 868         return 0;
 869 }
 870
 871 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
 872 {
 873         struct sh_vou_device *vou_dev = video_drvdata(file);
 874
 875         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 876
 877         *std = vou_dev->std;
 878
 879         return 0;
 880 }
 881
 882 static int sh_vou_log_status(struct file *file, void *priv)
 883 {
 884         struct sh_vou_device *vou_dev = video_drvdata(file);
 885
 886         pr_info("VOUER:   0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUER));
 887         pr_info("VOUCR:   0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUCR));
 888         pr_info("VOUSTR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSTR));
 889         pr_info("VOUVCR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVCR));
 890         pr_info("VOUISR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUISR));
 891         pr_info("VOUBCR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUBCR));
 892         pr_info("VOUDPR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDPR));
 893         pr_info("VOUDSR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDSR));
 894         pr_info("VOUVPR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVPR));
 895         pr_info("VOUIR:   0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUIR));
 896         pr_info("VOUSRR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSRR));
 897         pr_info("VOUMSR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUMSR));
 898         pr_info("VOUHIR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUHIR));
 899         pr_info("VOUDFR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDFR));
 900         pr_info("VOUAD1R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD1R));
 901         pr_info("VOUAD2R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD2R));
 902         pr_info("VOUAIR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAIR));
 903         pr_info("VOUSWR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSWR));
 904         pr_info("VOURCR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURCR));
 905         pr_info("VOURPR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURPR));
 906         return 0;
 907 }
 908
 909 static int sh_vou_g_selection(struct file *file, void *fh,
 910                               struct v4l2_selection *sel)
 911 {
 912         struct sh_vou_device *vou_dev = video_drvdata(file);
 913
 914         if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 915                 return -EINVAL;
 916         switch (sel->target) {
 917         case V4L2_SEL_TGT_COMPOSE:
 918                 sel->r = vou_dev->rect;
 919                 break;
 920         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 921         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 922                 sel->r.left = 0;
 923                 sel->r.top = 0;
 924                 sel->r.width = VOU_MAX_IMAGE_WIDTH;
 925                 if (vou_dev->std & V4L2_STD_525_60)
 926                         sel->r.height = 480;
 927                 else
 928                         sel->r.height = 576;
 929                 break;
 930         default:
 931                 return -EINVAL;
 932         }
 933         return 0;
 934 }
 935
 936 /* Assume a dull encoder, do all the work ourselves. */
 937 static int sh_vou_s_selection(struct file *file, void *fh,
 938                               struct v4l2_selection *sel)
 939 {
 940         struct v4l2_rect *rect = &sel->r;
 941         struct sh_vou_device *vou_dev = video_drvdata(file);
 942         struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
 943         struct v4l2_pix_format *pix = &vou_dev->pix;
 944         struct sh_vou_geometry geo;
 945         struct v4l2_subdev_format format = {
 946                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 947                 /* Revisit: is this the correct code? */
 948                 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
 949                 .format.field = V4L2_FIELD_INTERLACED,
 950                 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
 951         };
 952         unsigned int img_height_max;
 953         int ret;
 954
 955         if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 956             sel->target != V4L2_SEL_TGT_COMPOSE)
 957                 return -EINVAL;
 958
 959         if (vb2_is_busy(&vou_dev->queue))
 960                 return -EBUSY;
 961
 962         if (vou_dev->std & V4L2_STD_525_60)
 963                 img_height_max = 480;
 964         else
 965                 img_height_max = 576;
 966
 967         v4l_bound_align_image(&rect->width,
 968                               VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 1,
 969                               &rect->height,
 970                               VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
 971
 972         if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
 973                 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
 974
 975         if (rect->height + rect->top > img_height_max)
 976                 rect->top = img_height_max - rect->height;
 977
 978         geo.output = *rect;
 979         geo.in_width = pix->width;
 980         geo.in_height = pix->height;
 981
 982         /* Configure the encoder one-to-one, position at 0, ignore errors */
 983         sd_crop.c.width = geo.output.width;
 984         sd_crop.c.height = geo.output.height;
 985         /*
 986          * We first issue a S_CROP, so that the subsequent S_FMT delivers the
 987          * final encoder configuration.
 988          */
 989         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
 990                                    s_crop, &sd_crop);
 991         format.format.width = geo.output.width;
 992         format.format.height = geo.output.height;
 993         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
 994                                          set_fmt, NULL, &format);
 995         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
 996         if (ret < 0)
 997                 return ret;
 998
 999         /* Sanity checks */
1000         if ((unsigned)format.format.width > VOU_MAX_IMAGE_WIDTH ||
1001             (unsigned)format.format.height > img_height_max ||
1002             format.format.code != MEDIA_BUS_FMT_YUYV8_2X8)
1003                 return -EIO;
1004
1005         geo.output.width = format.format.width;
1006         geo.output.height = format.format.height;
1007
1008         /*
1009          * No down-scaling. According to the API, current call has precedence:
1010          * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
1011          */
1012         vou_adjust_input(&geo, vou_dev->std);
1013
1014         /* We tried to preserve output rectangle, but it could have changed */
1015         vou_dev->rect = geo.output;
1016         pix->width = geo.in_width;
1017         pix->height = geo.in_height;
1018
1019         sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1020                                   geo.scale_idx_h, geo.scale_idx_v);
1021
1022         return 0;
1023 }
1024
1025 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1026 {
1027         struct sh_vou_device *vou_dev = dev_id;
1028         static unsigned long j;
1029         struct sh_vou_buffer *vb;
1030         static int cnt;
1031         u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1032         u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1033
1034         if (!(irq_status & 0x300)) {
1035                 if (printk_timed_ratelimit(&j, 500))
1036                         dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1037                                  irq_status);
1038                 return IRQ_NONE;
1039         }
1040
1041         spin_lock(&vou_dev->lock);
1042         if (!vou_dev->active || list_empty(&vou_dev->buf_list)) {
1043                 if (printk_timed_ratelimit(&j, 500))
1044                         dev_warn(vou_dev->v4l2_dev.dev,
1045                                  "IRQ without active buffer: %x!\n", irq_status);
1046                 /* Just ack: buf_release will disable further interrupts */
1047                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1048                 spin_unlock(&vou_dev->lock);
1049                 return IRQ_HANDLED;
1050         }
1051
1052         masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1053         dev_dbg(vou_dev->v4l2_dev.dev,
1054                 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1055                 irq_status, masked, vou_status, cnt);
1056
1057         cnt++;
1058         /* side = vou_status & 0x10000; */
1059
1060         /* Clear only set interrupts */
1061         sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1062
1063         vb = vou_dev->active;
1064         if (list_is_singular(&vb->list)) {
1065                 /* Keep cycling while no next buffer is available */
1066                 sh_vou_schedule_next(vou_dev, &vb->vb);
1067                 spin_unlock(&vou_dev->lock);
1068                 return IRQ_HANDLED;
1069         }
1070
1071         list_del(&vb->list);
1072
1073         vb->vb.vb2_buf.timestamp = ktime_get_ns();
1074         vb->vb.sequence = vou_dev->sequence++;
1075         vb->vb.field = V4L2_FIELD_INTERLACED;
1076         vb2_buffer_done(&vb->vb.vb2_buf, VB2_BUF_STATE_DONE);
1077
1078         vou_dev->active = list_entry(vou_dev->buf_list.next,
1079                                      struct sh_vou_buffer, list);
1080
1081         if (list_is_singular(&vou_dev->buf_list)) {
1082                 /* Keep cycling while no next buffer is available */
1083                 sh_vou_schedule_next(vou_dev, &vou_dev->active->vb);
1084         } else {
1085                 struct sh_vou_buffer *new = list_entry(vou_dev->active->list.next,
1086                                                 struct sh_vou_buffer, list);
1087                 sh_vou_schedule_next(vou_dev, &new->vb);
1088         }
1089
1090         spin_unlock(&vou_dev->lock);
1091
1092         return IRQ_HANDLED;
1093 }
1094
1095 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1096 {
1097         struct sh_vou_pdata *pdata = vou_dev->pdata;
1098         u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1099         int i = 100;
1100
1101         /* Disable all IRQs */
1102         sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1103
1104         /* Reset VOU interfaces - registers unaffected */
1105         sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1106         while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1107                 udelay(1);
1108
1109         if (!i)
1110                 return -ETIMEDOUT;
1111
1112         dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1113
1114         if (pdata->flags & SH_VOU_PCLK_FALLING)
1115                 voucr |= 1 << 28;
1116         if (pdata->flags & SH_VOU_HSYNC_LOW)
1117                 voucr |= 1 << 27;
1118         if (pdata->flags & SH_VOU_VSYNC_LOW)
1119                 voucr |= 1 << 26;
1120         sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1121
1122         /* Manual register side switching at first */
1123         sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1124         /* Default - fixed HSYNC length, can be made configurable is required */
1125         sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1126
1127         sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
1128
1129         return 0;
1130 }
1131
1132 /* File operations */
1133 static int sh_vou_open(struct file *file)
1134 {
1135         struct sh_vou_device *vou_dev = video_drvdata(file);
1136         int err;
1137
1138         if (mutex_lock_interruptible(&vou_dev->fop_lock))
1139                 return -ERESTARTSYS;
1140
1141         err = v4l2_fh_open(file);
1142         if (err)
1143                 goto done_open;
1144         if (v4l2_fh_is_singular_file(file) &&
1145             vou_dev->status == SH_VOU_INITIALISING) {
1146                 /* First open */
1147                 pm_runtime_get_sync(vou_dev->v4l2_dev.dev);
1148                 err = sh_vou_hw_init(vou_dev);
1149                 if (err < 0) {
1150                         pm_runtime_put(vou_dev->v4l2_dev.dev);
1151                         v4l2_fh_release(file);
1152                 } else {
1153                         vou_dev->status = SH_VOU_IDLE;
1154                 }
1155         }
1156 done_open:
1157         mutex_unlock(&vou_dev->fop_lock);
1158         return err;
1159 }
1160
1161 static int sh_vou_release(struct file *file)
1162 {
1163         struct sh_vou_device *vou_dev = video_drvdata(file);
1164         bool is_last;
1165
1166         mutex_lock(&vou_dev->fop_lock);
1167         is_last = v4l2_fh_is_singular_file(file);
1168         _vb2_fop_release(file, NULL);
1169         if (is_last) {
1170                 /* Last close */
1171                 vou_dev->status = SH_VOU_INITIALISING;
1172                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1173                 pm_runtime_put(vou_dev->v4l2_dev.dev);
1174         }
1175         mutex_unlock(&vou_dev->fop_lock);
1176         return 0;
1177 }
1178
1179 /* sh_vou display ioctl operations */
1180 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1181         .vidioc_querycap                = sh_vou_querycap,
1182         .vidioc_enum_fmt_vid_out        = sh_vou_enum_fmt_vid_out,
1183         .vidioc_g_fmt_vid_out           = sh_vou_g_fmt_vid_out,
1184         .vidioc_s_fmt_vid_out           = sh_vou_s_fmt_vid_out,
1185         .vidioc_try_fmt_vid_out         = sh_vou_try_fmt_vid_out,
1186         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1187         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1188         .vidioc_querybuf                = vb2_ioctl_querybuf,
1189         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1190         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1191         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
1192         .vidioc_streamon                = vb2_ioctl_streamon,
1193         .vidioc_streamoff               = vb2_ioctl_streamoff,
1194         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1195         .vidioc_g_output                = sh_vou_g_output,
1196         .vidioc_s_output                = sh_vou_s_output,
1197         .vidioc_enum_output             = sh_vou_enum_output,
1198         .vidioc_s_std                   = sh_vou_s_std,
1199         .vidioc_g_std                   = sh_vou_g_std,
1200         .vidioc_g_selection             = sh_vou_g_selection,
1201         .vidioc_s_selection             = sh_vou_s_selection,
1202         .vidioc_log_status              = sh_vou_log_status,
1203 };
1204
1205 static const struct v4l2_file_operations sh_vou_fops = {
1206         .owner          = THIS_MODULE,
1207         .open           = sh_vou_open,
1208         .release        = sh_vou_release,
1209         .unlocked_ioctl = video_ioctl2,
1210         .mmap           = vb2_fop_mmap,
1211         .poll           = vb2_fop_poll,
1212         .write          = vb2_fop_write,
1213 };
1214
1215 static const struct video_device sh_vou_video_template = {
1216         .name           = "sh_vou",
1217         .fops           = &sh_vou_fops,
1218         .ioctl_ops      = &sh_vou_ioctl_ops,
1219         .tvnorms        = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1220         .vfl_dir        = VFL_DIR_TX,
1221 };
1222
1223 static int sh_vou_probe(struct platform_device *pdev)
1224 {
1225         struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1226         struct v4l2_rect *rect;
1227         struct v4l2_pix_format *pix;
1228         struct i2c_adapter *i2c_adap;
1229         struct video_device *vdev;
1230         struct sh_vou_device *vou_dev;
1231         struct resource *reg_res;
1232         struct v4l2_subdev *subdev;
1233         struct vb2_queue *q;
1234         int irq, ret;
1235
1236         reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1237         irq = platform_get_irq(pdev, 0);
1238
1239         if (!vou_pdata || !reg_res || irq <= 0) {
1240                 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1241                 return -ENODEV;
1242         }
1243
1244         vou_dev = devm_kzalloc(&pdev->dev, sizeof(*vou_dev), GFP_KERNEL);
1245         if (!vou_dev)
1246                 return -ENOMEM;
1247
1248         INIT_LIST_HEAD(&vou_dev->buf_list);
1249         spin_lock_init(&vou_dev->lock);
1250         mutex_init(&vou_dev->fop_lock);
1251         vou_dev->pdata = vou_pdata;
1252         vou_dev->status = SH_VOU_INITIALISING;
1253         vou_dev->pix_idx = 1;
1254
1255         rect = &vou_dev->rect;
1256         pix = &vou_dev->pix;
1257
1258         /* Fill in defaults */
1259         vou_dev->std            = V4L2_STD_NTSC_M;
1260         rect->left              = 0;
1261         rect->top               = 0;
1262         rect->width             = VOU_MAX_IMAGE_WIDTH;
1263         rect->height            = 480;
1264         pix->width              = VOU_MAX_IMAGE_WIDTH;
1265         pix->height             = 480;
1266         pix->pixelformat        = V4L2_PIX_FMT_NV16;
1267         pix->field              = V4L2_FIELD_INTERLACED;
1268         pix->bytesperline       = VOU_MAX_IMAGE_WIDTH;
1269         pix->sizeimage          = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1270         pix->colorspace         = V4L2_COLORSPACE_SMPTE170M;
1271
1272         vou_dev->base = devm_ioremap_resource(&pdev->dev, reg_res);
1273         if (IS_ERR(vou_dev->base))
1274                 return PTR_ERR(vou_dev->base);
1275
1276         ret = devm_request_irq(&pdev->dev, irq, sh_vou_isr, 0, "vou", vou_dev);
1277         if (ret < 0)
1278                 return ret;
1279
1280         ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1281         if (ret < 0) {
1282                 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1283                 return ret;
1284         }
1285
1286         vdev = &vou_dev->vdev;
1287         *vdev = sh_vou_video_template;
1288         if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1289                 vdev->tvnorms |= V4L2_STD_PAL;
1290         vdev->v4l2_dev = &vou_dev->v4l2_dev;
1291         vdev->release = video_device_release_empty;
1292         vdev->lock = &vou_dev->fop_lock;
1293
1294         video_set_drvdata(vdev, vou_dev);
1295
1296         /* Initialize the vb2 queue */
1297         q = &vou_dev->queue;
1298         q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1299         q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_WRITE;
1300         q->drv_priv = vou_dev;
1301         q->buf_struct_size = sizeof(struct sh_vou_buffer);
1302         q->ops = &sh_vou_qops;
1303         q->mem_ops = &vb2_dma_contig_memops;
1304         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1305         q->min_buffers_needed = 2;
1306         q->lock = &vou_dev->fop_lock;
1307         ret = vb2_queue_init(q);
1308         if (ret)
1309                 goto einitctx;
1310
1311         vou_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1312         if (IS_ERR(vou_dev->alloc_ctx)) {
1313                 dev_err(&pdev->dev, "Can't allocate buffer context");
1314                 ret = PTR_ERR(vou_dev->alloc_ctx);
1315                 goto einitctx;
1316         }
1317         vdev->queue = q;
1318         INIT_LIST_HEAD(&vou_dev->buf_list);
1319
1320         pm_runtime_enable(&pdev->dev);
1321         pm_runtime_resume(&pdev->dev);
1322
1323         i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1324         if (!i2c_adap) {
1325                 ret = -ENODEV;
1326                 goto ei2cgadap;
1327         }
1328
1329         ret = sh_vou_hw_init(vou_dev);
1330         if (ret < 0)
1331                 goto ereset;
1332
1333         subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1334                         vou_pdata->board_info, NULL);
1335         if (!subdev) {
1336                 ret = -ENOMEM;
1337                 goto ei2cnd;
1338         }
1339
1340         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1341         if (ret < 0)
1342                 goto evregdev;
1343
1344         return 0;
1345
1346 evregdev:
1347 ei2cnd:
1348 ereset:
1349         i2c_put_adapter(i2c_adap);
1350 ei2cgadap:
1351         vb2_dma_contig_cleanup_ctx(vou_dev->alloc_ctx);
1352 einitctx:
1353         pm_runtime_disable(&pdev->dev);
1354         v4l2_device_unregister(&vou_dev->v4l2_dev);
1355         return ret;
1356 }
1357
1358 static int sh_vou_remove(struct platform_device *pdev)
1359 {
1360         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1361         struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1362                                                 struct sh_vou_device, v4l2_dev);
1363         struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1364                                             struct v4l2_subdev, list);
1365         struct i2c_client *client = v4l2_get_subdevdata(sd);
1366
1367         pm_runtime_disable(&pdev->dev);
1368         video_unregister_device(&vou_dev->vdev);
1369         i2c_put_adapter(client->adapter);
1370         vb2_dma_contig_cleanup_ctx(vou_dev->alloc_ctx);
1371         v4l2_device_unregister(&vou_dev->v4l2_dev);
1372         return 0;
1373 }
1374
1375 static struct platform_driver __refdata sh_vou = {
1376         .remove  = sh_vou_remove,
1377         .driver  = {
1378                 .name   = "sh-vou",
1379         },
1380 };
1381
1382 module_platform_driver_probe(sh_vou, sh_vou_probe);
1383
1384 MODULE_DESCRIPTION("SuperH VOU driver");
1385 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1386 MODULE_LICENSE("GPL v2");
1387 MODULE_VERSION("0.1.0");
1388 MODULE_ALIAS("platform:sh-vou");