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