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/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, const void *parg,
 247                        unsigned int *nbuffers, unsigned int *nplanes,
 248                        unsigned int sizes[], void *alloc_ctxs[])
 249 {
 250         const struct v4l2_format *fmt = parg;
 251         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
 252         struct v4l2_pix_format *pix = &vou_dev->pix;
 253         int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
 254
 255         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 256
 257         if (fmt && fmt->fmt.pix.sizeimage < pix->height * bytes_per_line)
 258                 return -EINVAL;
 259         *nplanes = 1;
 260         sizes[0] = fmt ? fmt->fmt.pix.sizeimage : pix->height * bytes_per_line;
 261         alloc_ctxs[0] = vou_dev->alloc_ctx;
 262         return 0;
 263 }
 264
 265 static int sh_vou_buf_prepare(struct vb2_buffer *vb)
 266 {
 267         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
 268         struct v4l2_pix_format *pix = &vou_dev->pix;
 269         unsigned bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
 270         unsigned size = pix->height * bytes_per_line;
 271
 272         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 273
 274         if (vb2_plane_size(vb, 0) < size) {
 275                 /* User buffer too small */
 276                 dev_warn(vou_dev->v4l2_dev.dev, "buffer too small (%lu < %u)\n",
 277                          vb2_plane_size(vb, 0), size);
 278                 return -EINVAL;
 279         }
 280
 281         vb2_set_plane_payload(vb, 0, size);
 282         return 0;
 283 }
 284
 285 /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
 286 static void sh_vou_buf_queue(struct vb2_buffer *vb)
 287 {
 288         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 289         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
 290         struct sh_vou_buffer *shbuf = to_sh_vou_buffer(vbuf);
 291         unsigned long flags;
 292
 293         spin_lock_irqsave(&vou_dev->lock, flags);
 294         list_add_tail(&shbuf->list, &vou_dev->buf_list);
 295         spin_unlock_irqrestore(&vou_dev->lock, flags);
 296 }
 297
 298 static int sh_vou_start_streaming(struct vb2_queue *vq, unsigned int count)
 299 {
 300         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
 301         struct sh_vou_buffer *buf, *node;
 302         int ret;
 303
 304         vou_dev->sequence = 0;
 305         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
 306                                          video, s_stream, 1);
 307         if (ret < 0 && ret != -ENOIOCTLCMD) {
 308                 list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
 309                         vb2_buffer_done(&buf->vb.vb2_buf,
 310                                         VB2_BUF_STATE_QUEUED);
 311                         list_del(&buf->list);
 312                 }
 313                 vou_dev->active = NULL;
 314                 return ret;
 315         }
 316
 317         buf = list_entry(vou_dev->buf_list.next, struct sh_vou_buffer, list);
 318
 319         vou_dev->active = buf;
 320
 321         /* Start from side A: we use mirror addresses, so, set B */
 322         sh_vou_reg_a_write(vou_dev, VOURPR, 1);
 323         dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n",
 324                 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
 325         sh_vou_schedule_next(vou_dev, &buf->vb);
 326
 327         buf = list_entry(buf->list.next, struct sh_vou_buffer, list);
 328
 329         /* Second buffer - initialise register side B */
 330         sh_vou_reg_a_write(vou_dev, VOURPR, 0);
 331         sh_vou_schedule_next(vou_dev, &buf->vb);
 332
 333         /* Register side switching with frame VSYNC */
 334         sh_vou_reg_a_write(vou_dev, VOURCR, 5);
 335
 336         sh_vou_stream_config(vou_dev);
 337         /* Enable End-of-Frame (VSYNC) interrupts */
 338         sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
 339
 340         /* Two buffers on the queue - activate the hardware */
 341         vou_dev->status = SH_VOU_RUNNING;
 342         sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
 343         return 0;
 344 }
 345
 346 static void sh_vou_stop_streaming(struct vb2_queue *vq)
 347 {
 348         struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
 349         struct sh_vou_buffer *buf, *node;
 350         unsigned long flags;
 351
 352         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
 353                                          video, s_stream, 0);
 354         /* disable output */
 355         sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
 356         /* ...but the current frame will complete */
 357         sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
 358         msleep(50);
 359         spin_lock_irqsave(&vou_dev->lock, flags);
 360         list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
 361                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 362                 list_del(&buf->list);
 363         }
 364         vou_dev->active = NULL;
 365         spin_unlock_irqrestore(&vou_dev->lock, flags);
 366 }
 367
 368 static struct vb2_ops sh_vou_qops = {
 369         .queue_setup            = sh_vou_queue_setup,
 370         .buf_prepare            = sh_vou_buf_prepare,
 371         .buf_queue              = sh_vou_buf_queue,
 372         .start_streaming        = sh_vou_start_streaming,
 373         .stop_streaming         = sh_vou_stop_streaming,
 374         .wait_prepare           = vb2_ops_wait_prepare,
 375         .wait_finish            = vb2_ops_wait_finish,
 376 };
 377
 378 /* Video IOCTLs */
 379 static int sh_vou_querycap(struct file *file, void  *priv,
 380                            struct v4l2_capability *cap)
 381 {
 382         struct sh_vou_device *vou_dev = video_drvdata(file);
 383
 384         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 385
 386         strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
 387         strlcpy(cap->driver, "sh-vou", sizeof(cap->driver));
 388         strlcpy(cap->bus_info, "platform:sh-vou", sizeof(cap->bus_info));
 389         cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE |
 390                            V4L2_CAP_STREAMING;
 391         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 392         return 0;
 393 }
 394
 395 /* Enumerate formats, that the device can accept from the user */
 396 static int sh_vou_enum_fmt_vid_out(struct file *file, void  *priv,
 397                                    struct v4l2_fmtdesc *fmt)
 398 {
 399         struct sh_vou_device *vou_dev = video_drvdata(file);
 400
 401         if (fmt->index >= ARRAY_SIZE(vou_fmt))
 402                 return -EINVAL;
 403
 404         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 405
 406         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 407         strlcpy(fmt->description, vou_fmt[fmt->index].desc,
 408                 sizeof(fmt->description));
 409         fmt->pixelformat = vou_fmt[fmt->index].pfmt;
 410
 411         return 0;
 412 }
 413
 414 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
 415                                 struct v4l2_format *fmt)
 416 {
 417         struct sh_vou_device *vou_dev = video_drvdata(file);
 418
 419         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 420
 421         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 422         fmt->fmt.pix = vou_dev->pix;
 423
 424         return 0;
 425 }
 426
 427 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
 428 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
 429 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
 430 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
 431 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
 432 static const unsigned char vou_scale_v_fld[] = {0, 1};
 433
 434 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
 435                                       int pix_idx, int w_idx, int h_idx)
 436 {
 437         struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
 438         unsigned int black_left, black_top, width_max,
 439                 frame_in_height, frame_out_height, frame_out_top;
 440         struct v4l2_rect *rect = &vou_dev->rect;
 441         struct v4l2_pix_format *pix = &vou_dev->pix;
 442         u32 vouvcr = 0, dsr_h, dsr_v;
 443
 444         if (vou_dev->std & V4L2_STD_525_60) {
 445                 width_max = 858;
 446                 /* height_max = 262; */
 447         } else {
 448                 width_max = 864;
 449                 /* height_max = 312; */
 450         }
 451
 452         frame_in_height = pix->height / 2;
 453         frame_out_height = rect->height / 2;
 454         frame_out_top = rect->top / 2;
 455
 456         /*
 457          * Cropping scheme: max useful image is 720x480, and the total video
 458          * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
 459          * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
 460          * of which the first 33 / 25 clocks HSYNC must be held active. This
 461          * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
 462          * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
 463          * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
 464          * beyond DSR, specified on the left and top by the VPR register "black
 465          * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
 466          * at 138 / 144 : 20, because that's the HSYNC timing, that our first
 467          * client requires, and that's exactly what leaves us 720 pixels for the
 468          * image; we leave VPR[VVP] at default 20 for now, because the client
 469          * doesn't seem to have any special requirements for it. Otherwise we
 470          * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
 471          * the selected standard, and DPR and DSR are selected according to
 472          * cropping. Q: how does the client detect the first valid line? Does
 473          * HSYNC stay inactive during invalid (black) lines?
 474          */
 475         black_left = width_max - VOU_MAX_IMAGE_WIDTH;
 476         black_top = 20;
 477
 478         dsr_h = rect->width + rect->left;
 479         dsr_v = frame_out_height + frame_out_top;
 480
 481         dev_dbg(vou_dev->v4l2_dev.dev,
 482                 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
 483                 pix->width, frame_in_height, black_left, black_top,
 484                 rect->left, frame_out_top, dsr_h, dsr_v);
 485
 486         /* VOUISR height - half of a frame height in frame mode */
 487         sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
 488         sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
 489         sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
 490         sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
 491
 492         /*
 493          * if necessary, we could set VOUHIR to
 494          * max(black_left + dsr_h, width_max) here
 495          */
 496
 497         if (w_idx)
 498                 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
 499         if (h_idx)
 500                 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
 501
 502         dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
 503
 504         /* To produce a colour bar for testing set bit 23 of VOUVCR */
 505         sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
 506         sh_vou_reg_ab_write(vou_dev, VOUDFR,
 507                             fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
 508 }
 509
 510 struct sh_vou_geometry {
 511         struct v4l2_rect output;
 512         unsigned int in_width;
 513         unsigned int in_height;
 514         int scale_idx_h;
 515         int scale_idx_v;
 516 };
 517
 518 /*
 519  * Find input geometry, that we can use to produce output, closest to the
 520  * requested rectangle, using VOU scaling
 521  */
 522 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
 523 {
 524         /* The compiler cannot know, that best and idx will indeed be set */
 525         unsigned int best_err = UINT_MAX, best = 0, img_height_max;
 526         int i, idx = 0;
 527
 528         if (std & V4L2_STD_525_60)
 529                 img_height_max = 480;
 530         else
 531                 img_height_max = 576;
 532
 533         /* Image width must be a multiple of 4 */
 534         v4l_bound_align_image(&geo->in_width,
 535                               VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
 536                               &geo->in_height,
 537                               VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
 538
 539         /* Select scales to come as close as possible to the output image */
 540         for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
 541                 unsigned int err;
 542                 unsigned int found = geo->output.width * vou_scale_h_den[i] /
 543                         vou_scale_h_num[i];
 544
 545                 if (found > VOU_MAX_IMAGE_WIDTH)
 546                         /* scales increase */
 547                         break;
 548
 549                 err = abs(found - geo->in_width);
 550                 if (err < best_err) {
 551                         best_err = err;
 552                         idx = i;
 553                         best = found;
 554                 }
 555                 if (!err)
 556                         break;
 557         }
 558
 559         geo->in_width = best;
 560         geo->scale_idx_h = idx;
 561
 562         best_err = UINT_MAX;
 563
 564         /* This loop can be replaced with one division */
 565         for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
 566                 unsigned int err;
 567                 unsigned int found = geo->output.height * vou_scale_v_den[i] /
 568                         vou_scale_v_num[i];
 569
 570                 if (found > img_height_max)
 571                         /* scales increase */
 572                         break;
 573
 574                 err = abs(found - geo->in_height);
 575                 if (err < best_err) {
 576                         best_err = err;
 577                         idx = i;
 578                         best = found;
 579                 }
 580                 if (!err)
 581                         break;
 582         }
 583
 584         geo->in_height = best;
 585         geo->scale_idx_v = idx;
 586 }
 587
 588 /*
 589  * Find output geometry, that we can produce, using VOU scaling, closest to
 590  * the requested rectangle
 591  */
 592 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
 593 {
 594         unsigned int best_err = UINT_MAX, best = geo->in_width,
 595                 width_max, height_max, img_height_max;
 596         int i, idx_h = 0, idx_v = 0;
 597
 598         if (std & V4L2_STD_525_60) {
 599                 width_max = 858;
 600                 height_max = 262 * 2;
 601                 img_height_max = 480;
 602         } else {
 603                 width_max = 864;
 604                 height_max = 312 * 2;
 605                 img_height_max = 576;
 606         }
 607
 608         /* Select scales to come as close as possible to the output image */
 609         for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
 610                 unsigned int err;
 611                 unsigned int found = geo->in_width * vou_scale_h_num[i] /
 612                         vou_scale_h_den[i];
 613
 614                 if (found > VOU_MAX_IMAGE_WIDTH)
 615                         /* scales increase */
 616                         break;
 617
 618                 err = abs(found - geo->output.width);
 619                 if (err < best_err) {
 620                         best_err = err;
 621                         idx_h = i;
 622                         best = found;
 623                 }
 624                 if (!err)
 625                         break;
 626         }
 627
 628         geo->output.width = best;
 629         geo->scale_idx_h = idx_h;
 630         if (geo->output.left + best > width_max)
 631                 geo->output.left = width_max - best;
 632
 633         pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
 634                  vou_scale_h_num[idx_h], vou_scale_h_den[idx_h], best);
 635
 636         best_err = UINT_MAX;
 637
 638         /* This loop can be replaced with one division */
 639         for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
 640                 unsigned int err;
 641                 unsigned int found = geo->in_height * vou_scale_v_num[i] /
 642                         vou_scale_v_den[i];
 643
 644                 if (found > img_height_max)
 645                         /* scales increase */
 646                         break;
 647
 648                 err = abs(found - geo->output.height);
 649                 if (err < best_err) {
 650                         best_err = err;
 651                         idx_v = i;
 652                         best = found;
 653                 }
 654                 if (!err)
 655                         break;
 656         }
 657
 658         geo->output.height = best;
 659         geo->scale_idx_v = idx_v;
 660         if (geo->output.top + best > height_max)
 661                 geo->output.top = height_max - best;
 662
 663         pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
 664                  vou_scale_v_num[idx_v], vou_scale_v_den[idx_v], best);
 665 }
 666
 667 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
 668                                   struct v4l2_format *fmt)
 669 {
 670         struct sh_vou_device *vou_dev = video_drvdata(file);
 671         struct v4l2_pix_format *pix = &fmt->fmt.pix;
 672         unsigned int img_height_max;
 673         int pix_idx;
 674
 675         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 676
 677         pix->field = V4L2_FIELD_INTERLACED;
 678         pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
 679         pix->ycbcr_enc = pix->quantization = 0;
 680
 681         for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
 682                 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
 683                         break;
 684
 685         if (pix_idx == ARRAY_SIZE(vou_fmt))
 686                 return -EINVAL;
 687
 688         if (vou_dev->std & V4L2_STD_525_60)
 689                 img_height_max = 480;
 690         else
 691                 img_height_max = 576;
 692
 693         v4l_bound_align_image(&pix->width,
 694                               VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
 695                               &pix->height,
 696                               VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
 697         pix->bytesperline = pix->width * vou_fmt[pix_idx].bpl;
 698         pix->sizeimage = pix->height * ((pix->width * vou_fmt[pix_idx].bpp) >> 3);
 699
 700         return 0;
 701 }
 702
 703 static int sh_vou_set_fmt_vid_out(struct sh_vou_device *vou_dev,
 704                                 struct v4l2_pix_format *pix)
 705 {
 706         unsigned int img_height_max;
 707         struct sh_vou_geometry geo;
 708         struct v4l2_subdev_format format = {
 709                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 710                 /* Revisit: is this the correct code? */
 711                 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
 712                 .format.field = V4L2_FIELD_INTERLACED,
 713                 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
 714         };
 715         struct v4l2_mbus_framefmt *mbfmt = &format.format;
 716         int pix_idx;
 717         int ret;
 718
 719         if (vb2_is_busy(&vou_dev->queue))
 720                 return -EBUSY;
 721
 722         for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
 723                 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
 724                         break;
 725
 726         geo.in_width = pix->width;
 727         geo.in_height = pix->height;
 728         geo.output = vou_dev->rect;
 729
 730         vou_adjust_output(&geo, vou_dev->std);
 731
 732         mbfmt->width = geo.output.width;
 733         mbfmt->height = geo.output.height;
 734         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
 735                                          set_fmt, NULL, &format);
 736         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
 737         if (ret < 0)
 738                 return ret;
 739
 740         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
 741                 geo.output.width, geo.output.height, mbfmt->width, mbfmt->height);
 742
 743         if (vou_dev->std & V4L2_STD_525_60)
 744                 img_height_max = 480;
 745         else
 746                 img_height_max = 576;
 747
 748         /* Sanity checks */
 749         if ((unsigned)mbfmt->width > VOU_MAX_IMAGE_WIDTH ||
 750             (unsigned)mbfmt->height > img_height_max ||
 751             mbfmt->code != MEDIA_BUS_FMT_YUYV8_2X8)
 752                 return -EIO;
 753
 754         if (mbfmt->width != geo.output.width ||
 755             mbfmt->height != geo.output.height) {
 756                 geo.output.width = mbfmt->width;
 757                 geo.output.height = mbfmt->height;
 758
 759                 vou_adjust_input(&geo, vou_dev->std);
 760         }
 761
 762         /* We tried to preserve output rectangle, but it could have changed */
 763         vou_dev->rect = geo.output;
 764         pix->width = geo.in_width;
 765         pix->height = geo.in_height;
 766
 767         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
 768                 pix->width, pix->height);
 769
 770         vou_dev->pix_idx = pix_idx;
 771
 772         vou_dev->pix = *pix;
 773
 774         sh_vou_configure_geometry(vou_dev, pix_idx,
 775                                   geo.scale_idx_h, geo.scale_idx_v);
 776
 777         return 0;
 778 }
 779
 780 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
 781                                 struct v4l2_format *fmt)
 782 {
 783         struct sh_vou_device *vou_dev = video_drvdata(file);
 784         int ret = sh_vou_try_fmt_vid_out(file, priv, fmt);
 785
 786         if (ret)
 787                 return ret;
 788         return sh_vou_set_fmt_vid_out(vou_dev, &fmt->fmt.pix);
 789 }
 790
 791 static int sh_vou_enum_output(struct file *file, void *fh,
 792                               struct v4l2_output *a)
 793 {
 794         struct sh_vou_device *vou_dev = video_drvdata(file);
 795
 796         if (a->index)
 797                 return -EINVAL;
 798         strlcpy(a->name, "Video Out", sizeof(a->name));
 799         a->type = V4L2_OUTPUT_TYPE_ANALOG;
 800         a->std = vou_dev->vdev.tvnorms;
 801         return 0;
 802 }
 803
 804 static int sh_vou_g_output(struct file *file, void *fh, unsigned int *i)
 805 {
 806         *i = 0;
 807         return 0;
 808 }
 809
 810 static int sh_vou_s_output(struct file *file, void *fh, unsigned int i)
 811 {
 812         return i ? -EINVAL : 0;
 813 }
 814
 815 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
 816 {
 817         switch (bus_fmt) {
 818         default:
 819                 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
 820                            __func__, bus_fmt);
 821         case SH_VOU_BUS_8BIT:
 822                 return 1;
 823         case SH_VOU_BUS_16BIT:
 824                 return 0;
 825         case SH_VOU_BUS_BT656:
 826                 return 3;
 827         }
 828 }
 829
 830 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id)
 831 {
 832         struct sh_vou_device *vou_dev = video_drvdata(file);
 833         int ret;
 834
 835         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id);
 836
 837         if (std_id == vou_dev->std)
 838                 return 0;
 839
 840         if (vb2_is_busy(&vou_dev->queue))
 841                 return -EBUSY;
 842
 843         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
 844                                          s_std_output, std_id);
 845         /* Shall we continue, if the subdev doesn't support .s_std_output()? */
 846         if (ret < 0 && ret != -ENOIOCTLCMD)
 847                 return ret;
 848
 849         vou_dev->rect.top = vou_dev->rect.left = 0;
 850         vou_dev->rect.width = VOU_MAX_IMAGE_WIDTH;
 851         if (std_id & V4L2_STD_525_60) {
 852                 sh_vou_reg_ab_set(vou_dev, VOUCR,
 853                         sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
 854                 vou_dev->rect.height = 480;
 855         } else {
 856                 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
 857                 vou_dev->rect.height = 576;
 858         }
 859
 860         vou_dev->pix.width = vou_dev->rect.width;
 861         vou_dev->pix.height = vou_dev->rect.height;
 862         vou_dev->pix.bytesperline =
 863                 vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpl;
 864         vou_dev->pix.sizeimage = vou_dev->pix.height *
 865                 ((vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpp) >> 3);
 866         vou_dev->std = std_id;
 867         sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
 868
 869         return 0;
 870 }
 871
 872 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
 873 {
 874         struct sh_vou_device *vou_dev = video_drvdata(file);
 875
 876         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
 877
 878         *std = vou_dev->std;
 879
 880         return 0;
 881 }
 882
 883 static int sh_vou_log_status(struct file *file, void *priv)
 884 {
 885         struct sh_vou_device *vou_dev = video_drvdata(file);
 886
 887         pr_info("VOUER:   0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUER));
 888         pr_info("VOUCR:   0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUCR));
 889         pr_info("VOUSTR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSTR));
 890         pr_info("VOUVCR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVCR));
 891         pr_info("VOUISR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUISR));
 892         pr_info("VOUBCR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUBCR));
 893         pr_info("VOUDPR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDPR));
 894         pr_info("VOUDSR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDSR));
 895         pr_info("VOUVPR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVPR));
 896         pr_info("VOUIR:   0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUIR));
 897         pr_info("VOUSRR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSRR));
 898         pr_info("VOUMSR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUMSR));
 899         pr_info("VOUHIR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUHIR));
 900         pr_info("VOUDFR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDFR));
 901         pr_info("VOUAD1R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD1R));
 902         pr_info("VOUAD2R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD2R));
 903         pr_info("VOUAIR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAIR));
 904         pr_info("VOUSWR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSWR));
 905         pr_info("VOURCR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURCR));
 906         pr_info("VOURPR:  0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURPR));
 907         return 0;
 908 }
 909
 910 static int sh_vou_g_selection(struct file *file, void *fh,
 911                               struct v4l2_selection *sel)
 912 {
 913         struct sh_vou_device *vou_dev = video_drvdata(file);
 914
 915         if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
 916                 return -EINVAL;
 917         switch (sel->target) {
 918         case V4L2_SEL_TGT_COMPOSE:
 919                 sel->r = vou_dev->rect;
 920                 break;
 921         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
 922         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
 923                 sel->r.left = 0;
 924                 sel->r.top = 0;
 925                 sel->r.width = VOU_MAX_IMAGE_WIDTH;
 926                 if (vou_dev->std & V4L2_STD_525_60)
 927                         sel->r.height = 480;
 928                 else
 929                         sel->r.height = 576;
 930                 break;
 931         default:
 932                 return -EINVAL;
 933         }
 934         return 0;
 935 }
 936
 937 /* Assume a dull encoder, do all the work ourselves. */
 938 static int sh_vou_s_selection(struct file *file, void *fh,
 939                               struct v4l2_selection *sel)
 940 {
 941         struct v4l2_rect *rect = &sel->r;
 942         struct sh_vou_device *vou_dev = video_drvdata(file);
 943         struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
 944         struct v4l2_pix_format *pix = &vou_dev->pix;
 945         struct sh_vou_geometry geo;
 946         struct v4l2_subdev_format format = {
 947                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 948                 /* Revisit: is this the correct code? */
 949                 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
 950                 .format.field = V4L2_FIELD_INTERLACED,
 951                 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
 952         };
 953         unsigned int img_height_max;
 954         int ret;
 955
 956         if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 957             sel->target != V4L2_SEL_TGT_COMPOSE)
 958                 return -EINVAL;
 959
 960         if (vb2_is_busy(&vou_dev->queue))
 961                 return -EBUSY;
 962
 963         if (vou_dev->std & V4L2_STD_525_60)
 964                 img_height_max = 480;
 965         else
 966                 img_height_max = 576;
 967
 968         v4l_bound_align_image(&rect->width,
 969                               VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 1,
 970                               &rect->height,
 971                               VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
 972
 973         if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
 974                 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
 975
 976         if (rect->height + rect->top > img_height_max)
 977                 rect->top = img_height_max - rect->height;
 978
 979         geo.output = *rect;
 980         geo.in_width = pix->width;
 981         geo.in_height = pix->height;
 982
 983         /* Configure the encoder one-to-one, position at 0, ignore errors */
 984         sd_crop.c.width = geo.output.width;
 985         sd_crop.c.height = geo.output.height;
 986         /*
 987          * We first issue a S_CROP, so that the subsequent S_FMT delivers the
 988          * final encoder configuration.
 989          */
 990         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
 991                                    s_crop, &sd_crop);
 992         format.format.width = geo.output.width;
 993         format.format.height = geo.output.height;
 994         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
 995                                          set_fmt, NULL, &format);
 996         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
 997         if (ret < 0)
 998                 return ret;
 999
1000         /* Sanity checks */
1001         if ((unsigned)format.format.width > VOU_MAX_IMAGE_WIDTH ||
1002             (unsigned)format.format.height > img_height_max ||
1003             format.format.code != MEDIA_BUS_FMT_YUYV8_2X8)
1004                 return -EIO;
1005
1006         geo.output.width = format.format.width;
1007         geo.output.height = format.format.height;
1008
1009         /*
1010          * No down-scaling. According to the API, current call has precedence:
1011          * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
1012          */
1013         vou_adjust_input(&geo, vou_dev->std);
1014
1015         /* We tried to preserve output rectangle, but it could have changed */
1016         vou_dev->rect = geo.output;
1017         pix->width = geo.in_width;
1018         pix->height = geo.in_height;
1019
1020         sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1021                                   geo.scale_idx_h, geo.scale_idx_v);
1022
1023         return 0;
1024 }
1025
1026 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1027 {
1028         struct sh_vou_device *vou_dev = dev_id;
1029         static unsigned long j;
1030         struct sh_vou_buffer *vb;
1031         static int cnt;
1032         u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1033         u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1034
1035         if (!(irq_status & 0x300)) {
1036                 if (printk_timed_ratelimit(&j, 500))
1037                         dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1038                                  irq_status);
1039                 return IRQ_NONE;
1040         }
1041
1042         spin_lock(&vou_dev->lock);
1043         if (!vou_dev->active || list_empty(&vou_dev->buf_list)) {
1044                 if (printk_timed_ratelimit(&j, 500))
1045                         dev_warn(vou_dev->v4l2_dev.dev,
1046                                  "IRQ without active buffer: %x!\n", irq_status);
1047                 /* Just ack: buf_release will disable further interrupts */
1048                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1049                 spin_unlock(&vou_dev->lock);
1050                 return IRQ_HANDLED;
1051         }
1052
1053         masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1054         dev_dbg(vou_dev->v4l2_dev.dev,
1055                 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1056                 irq_status, masked, vou_status, cnt);
1057
1058         cnt++;
1059         /* side = vou_status & 0x10000; */
1060
1061         /* Clear only set interrupts */
1062         sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1063
1064         vb = vou_dev->active;
1065         if (list_is_singular(&vb->list)) {
1066                 /* Keep cycling while no next buffer is available */
1067                 sh_vou_schedule_next(vou_dev, &vb->vb);
1068                 spin_unlock(&vou_dev->lock);
1069                 return IRQ_HANDLED;
1070         }
1071
1072         list_del(&vb->list);
1073
1074         v4l2_get_timestamp(&vb->vb.timestamp);
1075         vb->vb.sequence = vou_dev->sequence++;
1076         vb->vb.field = V4L2_FIELD_INTERLACED;
1077         vb2_buffer_done(&vb->vb.vb2_buf, VB2_BUF_STATE_DONE);
1078
1079         vou_dev->active = list_entry(vou_dev->buf_list.next,
1080                                      struct sh_vou_buffer, list);
1081
1082         if (list_is_singular(&vou_dev->buf_list)) {
1083                 /* Keep cycling while no next buffer is available */
1084                 sh_vou_schedule_next(vou_dev, &vou_dev->active->vb);
1085         } else {
1086                 struct sh_vou_buffer *new = list_entry(vou_dev->active->list.next,
1087                                                 struct sh_vou_buffer, list);
1088                 sh_vou_schedule_next(vou_dev, &new->vb);
1089         }
1090
1091         spin_unlock(&vou_dev->lock);
1092
1093         return IRQ_HANDLED;
1094 }
1095
1096 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1097 {
1098         struct sh_vou_pdata *pdata = vou_dev->pdata;
1099         u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1100         int i = 100;
1101
1102         /* Disable all IRQs */
1103         sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1104
1105         /* Reset VOU interfaces - registers unaffected */
1106         sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1107         while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1108                 udelay(1);
1109
1110         if (!i)
1111                 return -ETIMEDOUT;
1112
1113         dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1114
1115         if (pdata->flags & SH_VOU_PCLK_FALLING)
1116                 voucr |= 1 << 28;
1117         if (pdata->flags & SH_VOU_HSYNC_LOW)
1118                 voucr |= 1 << 27;
1119         if (pdata->flags & SH_VOU_VSYNC_LOW)
1120                 voucr |= 1 << 26;
1121         sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1122
1123         /* Manual register side switching at first */
1124         sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1125         /* Default - fixed HSYNC length, can be made configurable is required */
1126         sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1127
1128         sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
1129
1130         return 0;
1131 }
1132
1133 /* File operations */
1134 static int sh_vou_open(struct file *file)
1135 {
1136         struct sh_vou_device *vou_dev = video_drvdata(file);
1137         int err;
1138
1139         if (mutex_lock_interruptible(&vou_dev->fop_lock))
1140                 return -ERESTARTSYS;
1141
1142         err = v4l2_fh_open(file);
1143         if (err)
1144                 goto done_open;
1145         if (v4l2_fh_is_singular_file(file) &&
1146             vou_dev->status == SH_VOU_INITIALISING) {
1147                 /* First open */
1148                 pm_runtime_get_sync(vou_dev->v4l2_dev.dev);
1149                 err = sh_vou_hw_init(vou_dev);
1150                 if (err < 0) {
1151                         pm_runtime_put(vou_dev->v4l2_dev.dev);
1152                         v4l2_fh_release(file);
1153                 } else {
1154                         vou_dev->status = SH_VOU_IDLE;
1155                 }
1156         }
1157 done_open:
1158         mutex_unlock(&vou_dev->fop_lock);
1159         return err;
1160 }
1161
1162 static int sh_vou_release(struct file *file)
1163 {
1164         struct sh_vou_device *vou_dev = video_drvdata(file);
1165         bool is_last;
1166
1167         mutex_lock(&vou_dev->fop_lock);
1168         is_last = v4l2_fh_is_singular_file(file);
1169         _vb2_fop_release(file, NULL);
1170         if (is_last) {
1171                 /* Last close */
1172                 vou_dev->status = SH_VOU_INITIALISING;
1173                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1174                 pm_runtime_put(vou_dev->v4l2_dev.dev);
1175         }
1176         mutex_unlock(&vou_dev->fop_lock);
1177         return 0;
1178 }
1179
1180 /* sh_vou display ioctl operations */
1181 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1182         .vidioc_querycap                = sh_vou_querycap,
1183         .vidioc_enum_fmt_vid_out        = sh_vou_enum_fmt_vid_out,
1184         .vidioc_g_fmt_vid_out           = sh_vou_g_fmt_vid_out,
1185         .vidioc_s_fmt_vid_out           = sh_vou_s_fmt_vid_out,
1186         .vidioc_try_fmt_vid_out         = sh_vou_try_fmt_vid_out,
1187         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
1188         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
1189         .vidioc_querybuf                = vb2_ioctl_querybuf,
1190         .vidioc_qbuf                    = vb2_ioctl_qbuf,
1191         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
1192         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
1193         .vidioc_streamon                = vb2_ioctl_streamon,
1194         .vidioc_streamoff               = vb2_ioctl_streamoff,
1195         .vidioc_expbuf                  = vb2_ioctl_expbuf,
1196         .vidioc_g_output                = sh_vou_g_output,
1197         .vidioc_s_output                = sh_vou_s_output,
1198         .vidioc_enum_output             = sh_vou_enum_output,
1199         .vidioc_s_std                   = sh_vou_s_std,
1200         .vidioc_g_std                   = sh_vou_g_std,
1201         .vidioc_g_selection             = sh_vou_g_selection,
1202         .vidioc_s_selection             = sh_vou_s_selection,
1203         .vidioc_log_status              = sh_vou_log_status,
1204 };
1205
1206 static const struct v4l2_file_operations sh_vou_fops = {
1207         .owner          = THIS_MODULE,
1208         .open           = sh_vou_open,
1209         .release        = sh_vou_release,
1210         .unlocked_ioctl = video_ioctl2,
1211         .mmap           = vb2_fop_mmap,
1212         .poll           = vb2_fop_poll,
1213         .write          = vb2_fop_write,
1214 };
1215
1216 static const struct video_device sh_vou_video_template = {
1217         .name           = "sh_vou",
1218         .fops           = &sh_vou_fops,
1219         .ioctl_ops      = &sh_vou_ioctl_ops,
1220         .tvnorms        = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1221         .vfl_dir        = VFL_DIR_TX,
1222 };
1223
1224 static int sh_vou_probe(struct platform_device *pdev)
1225 {
1226         struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1227         struct v4l2_rect *rect;
1228         struct v4l2_pix_format *pix;
1229         struct i2c_adapter *i2c_adap;
1230         struct video_device *vdev;
1231         struct sh_vou_device *vou_dev;
1232         struct resource *reg_res;
1233         struct v4l2_subdev *subdev;
1234         struct vb2_queue *q;
1235         int irq, ret;
1236
1237         reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1238         irq = platform_get_irq(pdev, 0);
1239
1240         if (!vou_pdata || !reg_res || irq <= 0) {
1241                 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1242                 return -ENODEV;
1243         }
1244
1245         vou_dev = devm_kzalloc(&pdev->dev, sizeof(*vou_dev), GFP_KERNEL);
1246         if (!vou_dev)
1247                 return -ENOMEM;
1248
1249         INIT_LIST_HEAD(&vou_dev->buf_list);
1250         spin_lock_init(&vou_dev->lock);
1251         mutex_init(&vou_dev->fop_lock);
1252         vou_dev->pdata = vou_pdata;
1253         vou_dev->status = SH_VOU_INITIALISING;
1254         vou_dev->pix_idx = 1;
1255
1256         rect = &vou_dev->rect;
1257         pix = &vou_dev->pix;
1258
1259         /* Fill in defaults */
1260         vou_dev->std            = V4L2_STD_NTSC_M;
1261         rect->left              = 0;
1262         rect->top               = 0;
1263         rect->width             = VOU_MAX_IMAGE_WIDTH;
1264         rect->height            = 480;
1265         pix->width              = VOU_MAX_IMAGE_WIDTH;
1266         pix->height             = 480;
1267         pix->pixelformat        = V4L2_PIX_FMT_NV16;
1268         pix->field              = V4L2_FIELD_INTERLACED;
1269         pix->bytesperline       = VOU_MAX_IMAGE_WIDTH;
1270         pix->sizeimage          = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1271         pix->colorspace         = V4L2_COLORSPACE_SMPTE170M;
1272
1273         vou_dev->base = devm_ioremap_resource(&pdev->dev, reg_res);
1274         if (IS_ERR(vou_dev->base))
1275                 return PTR_ERR(vou_dev->base);
1276
1277         ret = devm_request_irq(&pdev->dev, irq, sh_vou_isr, 0, "vou", vou_dev);
1278         if (ret < 0)
1279                 return ret;
1280
1281         ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1282         if (ret < 0) {
1283                 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1284                 return ret;
1285         }
1286
1287         vdev = &vou_dev->vdev;
1288         *vdev = sh_vou_video_template;
1289         if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1290                 vdev->tvnorms |= V4L2_STD_PAL;
1291         vdev->v4l2_dev = &vou_dev->v4l2_dev;
1292         vdev->release = video_device_release_empty;
1293         vdev->lock = &vou_dev->fop_lock;
1294
1295         video_set_drvdata(vdev, vou_dev);
1296
1297         /* Initialize the vb2 queue */
1298         q = &vou_dev->queue;
1299         q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1300         q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_WRITE;
1301         q->drv_priv = vou_dev;
1302         q->buf_struct_size = sizeof(struct sh_vou_buffer);
1303         q->ops = &sh_vou_qops;
1304         q->mem_ops = &vb2_dma_contig_memops;
1305         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1306         q->min_buffers_needed = 2;
1307         q->lock = &vou_dev->fop_lock;
1308         ret = vb2_queue_init(q);
1309         if (ret)
1310                 goto einitctx;
1311
1312         vou_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1313         if (IS_ERR(vou_dev->alloc_ctx)) {
1314                 dev_err(&pdev->dev, "Can't allocate buffer context");
1315                 ret = PTR_ERR(vou_dev->alloc_ctx);
1316                 goto einitctx;
1317         }
1318         vdev->queue = q;
1319         INIT_LIST_HEAD(&vou_dev->buf_list);
1320
1321         pm_runtime_enable(&pdev->dev);
1322         pm_runtime_resume(&pdev->dev);
1323
1324         i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1325         if (!i2c_adap) {
1326                 ret = -ENODEV;
1327                 goto ei2cgadap;
1328         }
1329
1330         ret = sh_vou_hw_init(vou_dev);
1331         if (ret < 0)
1332                 goto ereset;
1333
1334         subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1335                         vou_pdata->board_info, NULL);
1336         if (!subdev) {
1337                 ret = -ENOMEM;
1338                 goto ei2cnd;
1339         }
1340
1341         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1342         if (ret < 0)
1343                 goto evregdev;
1344
1345         return 0;
1346
1347 evregdev:
1348 ei2cnd:
1349 ereset:
1350         i2c_put_adapter(i2c_adap);
1351 ei2cgadap:
1352         vb2_dma_contig_cleanup_ctx(vou_dev->alloc_ctx);
1353 einitctx:
1354         pm_runtime_disable(&pdev->dev);
1355         v4l2_device_unregister(&vou_dev->v4l2_dev);
1356         return ret;
1357 }
1358
1359 static int sh_vou_remove(struct platform_device *pdev)
1360 {
1361         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1362         struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1363                                                 struct sh_vou_device, v4l2_dev);
1364         struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1365                                             struct v4l2_subdev, list);
1366         struct i2c_client *client = v4l2_get_subdevdata(sd);
1367
1368         pm_runtime_disable(&pdev->dev);
1369         video_unregister_device(&vou_dev->vdev);
1370         i2c_put_adapter(client->adapter);
1371         vb2_dma_contig_cleanup_ctx(vou_dev->alloc_ctx);
1372         v4l2_device_unregister(&vou_dev->v4l2_dev);
1373         return 0;
1374 }
1375
1376 static struct platform_driver __refdata sh_vou = {
1377         .remove  = sh_vou_remove,
1378         .driver  = {
1379                 .name   = "sh-vou",
1380         },
1381 };
1382
1383 module_platform_driver_probe(sh_vou, sh_vou_probe);
1384
1385 MODULE_DESCRIPTION("SuperH VOU driver");
1386 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1387 MODULE_LICENSE("GPL v2");
1388 MODULE_VERSION("0.1.0");
1389 MODULE_ALIAS("platform:sh-vou");