drivers/media/video/fsl-viu.c

   1 /*
   2  * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
   3  *
   4  *  Freescale VIU video driver
   5  *
   6  *  Authors: Hongjun Chen <hong-jun.chen@freescale.com>
   7  *           Porting to 2.6.35 by DENX Software Engineering,
   8  *           Anatolij Gustschin <agust@denx.de>
   9  *
  10  * This program is free software; you can redistribute  it and/or modify it
  11  * under  the terms of  the GNU General  Public License as published by the
  12  * Free Software Foundation;  either version 2 of the  License, or (at your
  13  * option) any later version.
  14  *
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/clk.h>
  19 #include <linux/kernel.h>
  20 #include <linux/i2c.h>
  21 #include <linux/init.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/io.h>
  24 #include <linux/of_platform.h>
  25 #include <linux/slab.h>
  26 #include <linux/version.h>
  27 #include <media/v4l2-common.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/v4l2-ioctl.h>
  30 #include <media/videobuf-dma-contig.h>
  31
  32 #define DRV_NAME                "fsl_viu"
  33 #define VIU_MAJOR_VERSION       0
  34 #define VIU_MINOR_VERSION       5
  35 #define VIU_RELEASE             0
  36 #define VIU_VERSION             KERNEL_VERSION(VIU_MAJOR_VERSION, \
  37                                                VIU_MINOR_VERSION, \
  38                                                VIU_RELEASE)
  39
  40 #define BUFFER_TIMEOUT          msecs_to_jiffies(500)  /* 0.5 seconds */
  41
  42 #define VIU_VID_MEM_LIMIT       4       /* Video memory limit, in Mb */
  43
  44 /* I2C address of video decoder chip is 0x4A */
  45 #define VIU_VIDEO_DECODER_ADDR  0x25
  46
  47 /* supported controls */
  48 static struct v4l2_queryctrl viu_qctrl[] = {
  49         {
  50                 .id            = V4L2_CID_BRIGHTNESS,
  51                 .type          = V4L2_CTRL_TYPE_INTEGER,
  52                 .name          = "Brightness",
  53                 .minimum       = 0,
  54                 .maximum       = 255,
  55                 .step          = 1,
  56                 .default_value = 127,
  57                 .flags         = 0,
  58         }, {
  59                 .id            = V4L2_CID_CONTRAST,
  60                 .type          = V4L2_CTRL_TYPE_INTEGER,
  61                 .name          = "Contrast",
  62                 .minimum       = 0,
  63                 .maximum       = 255,
  64                 .step          = 0x1,
  65                 .default_value = 0x10,
  66                 .flags         = 0,
  67         }, {
  68                 .id            = V4L2_CID_SATURATION,
  69                 .type          = V4L2_CTRL_TYPE_INTEGER,
  70                 .name          = "Saturation",
  71                 .minimum       = 0,
  72                 .maximum       = 255,
  73                 .step          = 0x1,
  74                 .default_value = 127,
  75                 .flags         = 0,
  76         }, {
  77                 .id            = V4L2_CID_HUE,
  78                 .type          = V4L2_CTRL_TYPE_INTEGER,
  79                 .name          = "Hue",
  80                 .minimum       = -128,
  81                 .maximum       = 127,
  82                 .step          = 0x1,
  83                 .default_value = 0,
  84                 .flags         = 0,
  85         }
  86 };
  87
  88 static int qctl_regs[ARRAY_SIZE(viu_qctrl)];
  89
  90 static int info_level;
  91
  92 #define dprintk(level, fmt, arg...)                                     \
  93         do {                                                            \
  94                 if (level <= info_level)                                \
  95                         printk(KERN_DEBUG "viu: " fmt , ## arg);        \
  96         } while (0)
  97
  98 /*
  99  * Basic structures
 100  */
 101 struct viu_fmt {
 102         char  name[32];
 103         u32   fourcc;           /* v4l2 format id */
 104         u32   pixelformat;
 105         int   depth;
 106 };
 107
 108 static struct viu_fmt formats[] = {
 109         {
 110                 .name           = "RGB-16 (5/B-6/G-5/R)",
 111                 .fourcc         = V4L2_PIX_FMT_RGB565,
 112                 .pixelformat    = V4L2_PIX_FMT_RGB565,
 113                 .depth          = 16,
 114         }, {
 115                 .name           = "RGB-32 (A-R-G-B)",
 116                 .fourcc         = V4L2_PIX_FMT_RGB32,
 117                 .pixelformat    = V4L2_PIX_FMT_RGB32,
 118                 .depth          = 32,
 119         }
 120 };
 121
 122 struct viu_dev;
 123 struct viu_buf;
 124
 125 /* buffer for one video frame */
 126 struct viu_buf {
 127         /* common v4l buffer stuff -- must be first */
 128         struct videobuf_buffer vb;
 129         struct viu_fmt *fmt;
 130 };
 131
 132 struct viu_dmaqueue {
 133         struct viu_dev          *dev;
 134         struct list_head        active;
 135         struct list_head        queued;
 136         struct timer_list       timeout;
 137 };
 138
 139 struct viu_status {
 140         u32 field_irq;
 141         u32 vsync_irq;
 142         u32 hsync_irq;
 143         u32 vstart_irq;
 144         u32 dma_end_irq;
 145         u32 error_irq;
 146 };
 147
 148 struct viu_reg {
 149         u32 status_cfg;
 150         u32 luminance;
 151         u32 chroma_r;
 152         u32 chroma_g;
 153         u32 chroma_b;
 154         u32 field_base_addr;
 155         u32 dma_inc;
 156         u32 picture_count;
 157         u32 req_alarm;
 158         u32 alpha;
 159 } __attribute__ ((packed));
 160
 161 struct viu_dev {
 162         struct v4l2_device      v4l2_dev;
 163         struct mutex            lock;
 164         spinlock_t              slock;
 165         int                     users;
 166
 167         struct device           *dev;
 168         /* various device info */
 169         struct video_device     *vdev;
 170         struct viu_dmaqueue     vidq;
 171         enum v4l2_field         capfield;
 172         int                     field;
 173         int                     first;
 174         int                     dma_done;
 175
 176         /* Hardware register area */
 177         struct viu_reg          *vr;
 178
 179         /* Interrupt vector */
 180         int                     irq;
 181         struct viu_status       irqs;
 182
 183         /* video overlay */
 184         struct v4l2_framebuffer ovbuf;
 185         struct viu_fmt          *ovfmt;
 186         unsigned int            ovenable;
 187         enum v4l2_field         ovfield;
 188
 189         /* crop */
 190         struct v4l2_rect        crop_current;
 191
 192         /* clock pointer */
 193         struct clk              *clk;
 194
 195         /* decoder */
 196         struct v4l2_subdev      *decoder;
 197
 198         v4l2_std_id             std;
 199 };
 200
 201 struct viu_fh {
 202         struct viu_dev          *dev;
 203
 204         /* video capture */
 205         struct videobuf_queue   vb_vidq;
 206         spinlock_t              vbq_lock; /* spinlock for the videobuf queue */
 207
 208         /* video overlay */
 209         struct v4l2_window      win;
 210         struct v4l2_clip        clips[1];
 211
 212         /* video capture */
 213         struct viu_fmt          *fmt;
 214         int                     width, height, sizeimage;
 215         enum v4l2_buf_type      type;
 216 };
 217
 218 static struct viu_reg reg_val;
 219
 220 /*
 221  * Macro definitions of VIU registers
 222  */
 223
 224 /* STATUS_CONFIG register */
 225 enum status_config {
 226         SOFT_RST                = 1 << 0,
 227
 228         ERR_MASK                = 0x0f << 4,    /* Error code mask */
 229         ERR_NO                  = 0x00,         /* No error */
 230         ERR_DMA_V               = 0x01 << 4,    /* DMA in vertical active */
 231         ERR_DMA_VB              = 0x02 << 4,    /* DMA in vertical blanking */
 232         ERR_LINE_TOO_LONG       = 0x04 << 4,    /* Line too long */
 233         ERR_TOO_MANG_LINES      = 0x05 << 4,    /* Too many lines in field */
 234         ERR_LINE_TOO_SHORT      = 0x06 << 4,    /* Line too short */
 235         ERR_NOT_ENOUGH_LINE     = 0x07 << 4,    /* Not enough lines in field */
 236         ERR_FIFO_OVERFLOW       = 0x08 << 4,    /* FIFO overflow */
 237         ERR_FIFO_UNDERFLOW      = 0x09 << 4,    /* FIFO underflow */
 238         ERR_1bit_ECC            = 0x0a << 4,    /* One bit ECC error */
 239         ERR_MORE_ECC            = 0x0b << 4,    /* Two/more bits ECC error */
 240
 241         INT_FIELD_EN            = 0x01 << 8,    /* Enable field interrupt */
 242         INT_VSYNC_EN            = 0x01 << 9,    /* Enable vsync interrupt */
 243         INT_HSYNC_EN            = 0x01 << 10,   /* Enable hsync interrupt */
 244         INT_VSTART_EN           = 0x01 << 11,   /* Enable vstart interrupt */
 245         INT_DMA_END_EN          = 0x01 << 12,   /* Enable DMA end interrupt */
 246         INT_ERROR_EN            = 0x01 << 13,   /* Enable error interrupt */
 247         INT_ECC_EN              = 0x01 << 14,   /* Enable ECC interrupt */
 248
 249         INT_FIELD_STATUS        = 0x01 << 16,   /* field interrupt status */
 250         INT_VSYNC_STATUS        = 0x01 << 17,   /* vsync interrupt status */
 251         INT_HSYNC_STATUS        = 0x01 << 18,   /* hsync interrupt status */
 252         INT_VSTART_STATUS       = 0x01 << 19,   /* vstart interrupt status */
 253         INT_DMA_END_STATUS      = 0x01 << 20,   /* DMA end interrupt status */
 254         INT_ERROR_STATUS        = 0x01 << 21,   /* error interrupt status */
 255
 256         DMA_ACT                 = 0x01 << 27,   /* Enable DMA transfer */
 257         FIELD_NO                = 0x01 << 28,   /* Field number */
 258         DITHER_ON               = 0x01 << 29,   /* Dithering is on */
 259         ROUND_ON                = 0x01 << 30,   /* Round is on */
 260         MODE_32BIT              = 0x01 << 31,   /* Data in RGBa888,
 261                                                  * 0 in RGB565
 262                                                  */
 263 };
 264
 265 #define norm_maxw()     720
 266 #define norm_maxh()     576
 267
 268 #define INT_ALL_STATUS  (INT_FIELD_STATUS | INT_VSYNC_STATUS | \
 269                          INT_HSYNC_STATUS | INT_VSTART_STATUS | \
 270                          INT_DMA_END_STATUS | INT_ERROR_STATUS)
 271
 272 #define NUM_FORMATS     ARRAY_SIZE(formats)
 273
 274 static irqreturn_t viu_intr(int irq, void *dev_id);
 275
 276 struct viu_fmt *format_by_fourcc(int fourcc)
 277 {
 278         int i;
 279
 280         for (i = 0; i < NUM_FORMATS; i++) {
 281                 if (formats[i].pixelformat == fourcc)
 282                         return formats + i;
 283         }
 284
 285         dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
 286         return NULL;
 287 }
 288
 289 void viu_start_dma(struct viu_dev *dev)
 290 {
 291         struct viu_reg *vr = dev->vr;
 292
 293         dev->field = 0;
 294
 295         /* Enable DMA operation */
 296         out_be32(&vr->status_cfg, SOFT_RST);
 297         out_be32(&vr->status_cfg, INT_FIELD_EN);
 298 }
 299
 300 void viu_stop_dma(struct viu_dev *dev)
 301 {
 302         struct viu_reg *vr = dev->vr;
 303         int cnt = 100;
 304         u32 status_cfg;
 305
 306         out_be32(&vr->status_cfg, 0);
 307
 308         /* Clear pending interrupts */
 309         status_cfg = in_be32(&vr->status_cfg);
 310         if (status_cfg & 0x3f0000)
 311                 out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
 312
 313         if (status_cfg & DMA_ACT) {
 314                 do {
 315                         status_cfg = in_be32(&vr->status_cfg);
 316                         if (status_cfg & INT_DMA_END_STATUS)
 317                                 break;
 318                 } while (cnt--);
 319
 320                 if (cnt < 0) {
 321                         /* timed out, issue soft reset */
 322                         out_be32(&vr->status_cfg, SOFT_RST);
 323                         out_be32(&vr->status_cfg, 0);
 324                 } else {
 325                         /* clear DMA_END and other pending irqs */
 326                         out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
 327                 }
 328         }
 329
 330         dev->field = 0;
 331 }
 332
 333 static int restart_video_queue(struct viu_dmaqueue *vidq)
 334 {
 335         struct viu_buf *buf, *prev;
 336
 337         dprintk(1, "%s vidq=0x%08lx\n", __func__, (unsigned long)vidq);
 338         if (!list_empty(&vidq->active)) {
 339                 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
 340                 dprintk(2, "restart_queue [%p/%d]: restart dma\n",
 341                         buf, buf->vb.i);
 342
 343                 viu_stop_dma(vidq->dev);
 344
 345                 /* cancel all outstanding capture requests */
 346                 list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) {
 347                         list_del(&buf->vb.queue);
 348                         buf->vb.state = VIDEOBUF_ERROR;
 349                         wake_up(&buf->vb.done);
 350                 }
 351                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 352                 return 0;
 353         }
 354
 355         prev = NULL;
 356         for (;;) {
 357                 if (list_empty(&vidq->queued))
 358                         return 0;
 359                 buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue);
 360                 if (prev == NULL) {
 361                         list_del(&buf->vb.queue);
 362                         list_add_tail(&buf->vb.queue, &vidq->active);
 363
 364                         dprintk(1, "Restarting video dma\n");
 365                         viu_stop_dma(vidq->dev);
 366                         viu_start_dma(vidq->dev);
 367
 368                         buf->vb.state = VIDEOBUF_ACTIVE;
 369                         mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 370                         dprintk(2, "[%p/%d] restart_queue - first active\n",
 371                                 buf, buf->vb.i);
 372
 373                 } else if (prev->vb.width  == buf->vb.width  &&
 374                            prev->vb.height == buf->vb.height &&
 375                            prev->fmt       == buf->fmt) {
 376                         list_del(&buf->vb.queue);
 377                         list_add_tail(&buf->vb.queue, &vidq->active);
 378                         buf->vb.state = VIDEOBUF_ACTIVE;
 379                         dprintk(2, "[%p/%d] restart_queue - move to active\n",
 380                                 buf, buf->vb.i);
 381                 } else {
 382                         return 0;
 383                 }
 384                 prev = buf;
 385         }
 386 }
 387
 388 static void viu_vid_timeout(unsigned long data)
 389 {
 390         struct viu_dev *dev = (struct viu_dev *)data;
 391         struct viu_buf *buf;
 392         struct viu_dmaqueue *vidq = &dev->vidq;
 393
 394         while (!list_empty(&vidq->active)) {
 395                 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
 396                 list_del(&buf->vb.queue);
 397                 buf->vb.state = VIDEOBUF_ERROR;
 398                 wake_up(&buf->vb.done);
 399                 dprintk(1, "viu/0: [%p/%d] timeout\n", buf, buf->vb.i);
 400         }
 401
 402         restart_video_queue(vidq);
 403 }
 404
 405 /*
 406  * Videobuf operations
 407  */
 408 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
 409                         unsigned int *size)
 410 {
 411         struct viu_fh *fh = vq->priv_data;
 412
 413         *size = fh->width * fh->height * fh->fmt->depth >> 3;
 414         if (*count == 0)
 415                 *count = 32;
 416
 417         while (*size * *count > VIU_VID_MEM_LIMIT * 1024 * 1024)
 418                 (*count)--;
 419
 420         dprintk(1, "%s, count=%d, size=%d\n", __func__, *count, *size);
 421         return 0;
 422 }
 423
 424 static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
 425 {
 426         struct videobuf_buffer *vb = &buf->vb;
 427         void *vaddr = NULL;
 428
 429         BUG_ON(in_interrupt());
 430
 431         videobuf_waiton(vq, &buf->vb, 0, 0);
 432
 433         if (vq->int_ops && vq->int_ops->vaddr)
 434                 vaddr = vq->int_ops->vaddr(vb);
 435
 436         if (vaddr)
 437                 videobuf_dma_contig_free(vq, &buf->vb);
 438
 439         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 440 }
 441
 442 inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf)
 443 {
 444         struct viu_reg *vr = dev->vr;
 445         int bpp;
 446
 447         /* setup the DMA base address */
 448         reg_val.field_base_addr = videobuf_to_dma_contig(&buf->vb);
 449
 450         dprintk(1, "buffer_activate [%p/%d]: dma addr 0x%lx\n",
 451                 buf, buf->vb.i, (unsigned long)reg_val.field_base_addr);
 452
 453         /* interlace is on by default, set horizontal DMA increment */
 454         reg_val.status_cfg = 0;
 455         bpp = buf->fmt->depth >> 3;
 456         switch (bpp) {
 457         case 2:
 458                 reg_val.status_cfg &= ~MODE_32BIT;
 459                 reg_val.dma_inc = buf->vb.width * 2;
 460                 break;
 461         case 4:
 462                 reg_val.status_cfg |= MODE_32BIT;
 463                 reg_val.dma_inc = buf->vb.width * 4;
 464                 break;
 465         default:
 466                 dprintk(0, "doesn't support color depth(%d)\n",
 467                         bpp * 8);
 468                 return -EINVAL;
 469         }
 470
 471         /* setup picture_count register */
 472         reg_val.picture_count = (buf->vb.height / 2) << 16 |
 473                                 buf->vb.width;
 474
 475         reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
 476
 477         buf->vb.state = VIDEOBUF_ACTIVE;
 478         dev->capfield = buf->vb.field;
 479
 480         /* reset dma increment if needed */
 481         if (!V4L2_FIELD_HAS_BOTH(buf->vb.field))
 482                 reg_val.dma_inc = 0;
 483
 484         out_be32(&vr->dma_inc, reg_val.dma_inc);
 485         out_be32(&vr->picture_count, reg_val.picture_count);
 486         out_be32(&vr->field_base_addr, reg_val.field_base_addr);
 487         mod_timer(&dev->vidq.timeout, jiffies + BUFFER_TIMEOUT);
 488         return 0;
 489 }
 490
 491 static int buffer_prepare(struct videobuf_queue *vq,
 492                           struct videobuf_buffer *vb,
 493                           enum v4l2_field field)
 494 {
 495         struct viu_fh  *fh  = vq->priv_data;
 496         struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
 497         int rc;
 498
 499         BUG_ON(fh->fmt == NULL);
 500
 501         if (fh->width  < 48 || fh->width  > norm_maxw() ||
 502             fh->height < 32 || fh->height > norm_maxh())
 503                 return -EINVAL;
 504         buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
 505         if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size)
 506                 return -EINVAL;
 507
 508         if (buf->fmt       != fh->fmt    ||
 509             buf->vb.width  != fh->width  ||
 510             buf->vb.height != fh->height ||
 511             buf->vb.field  != field) {
 512                 buf->fmt       = fh->fmt;
 513                 buf->vb.width  = fh->width;
 514                 buf->vb.height = fh->height;
 515                 buf->vb.field  = field;
 516         }
 517
 518         if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
 519                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 520                 if (rc != 0)
 521                         goto fail;
 522
 523                 buf->vb.width  = fh->width;
 524                 buf->vb.height = fh->height;
 525                 buf->vb.field  = field;
 526                 buf->fmt       = fh->fmt;
 527         }
 528
 529         buf->vb.state = VIDEOBUF_PREPARED;
 530         return 0;
 531
 532 fail:
 533         free_buffer(vq, buf);
 534         return rc;
 535 }
 536
 537 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 538 {
 539         struct viu_buf       *buf     = container_of(vb, struct viu_buf, vb);
 540         struct viu_fh        *fh      = vq->priv_data;
 541         struct viu_dev       *dev     = fh->dev;
 542         struct viu_dmaqueue  *vidq    = &dev->vidq;
 543         struct viu_buf       *prev;
 544
 545         if (!list_empty(&vidq->queued)) {
 546                 dprintk(1, "adding vb queue=0x%08lx\n",
 547                                 (unsigned long)&buf->vb.queue);
 548                 dprintk(1, "vidq pointer 0x%p, queued 0x%p\n",
 549                                 vidq, &vidq->queued);
 550                 dprintk(1, "dev %p, queued: self %p, next %p, head %p\n",
 551                         dev, &vidq->queued, vidq->queued.next,
 552                         vidq->queued.prev);
 553                 list_add_tail(&buf->vb.queue, &vidq->queued);
 554                 buf->vb.state = VIDEOBUF_QUEUED;
 555                 dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
 556                         buf, buf->vb.i);
 557         } else if (list_empty(&vidq->active)) {
 558                 dprintk(1, "adding vb active=0x%08lx\n",
 559                                 (unsigned long)&buf->vb.queue);
 560                 list_add_tail(&buf->vb.queue, &vidq->active);
 561                 buf->vb.state = VIDEOBUF_ACTIVE;
 562                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 563                 dprintk(2, "[%p/%d] buffer_queue - first active\n",
 564                         buf, buf->vb.i);
 565
 566                 buffer_activate(dev, buf);
 567         } else {
 568                 dprintk(1, "adding vb queue2=0x%08lx\n",
 569                                 (unsigned long)&buf->vb.queue);
 570                 prev = list_entry(vidq->active.prev, struct viu_buf, vb.queue);
 571                 if (prev->vb.width  == buf->vb.width  &&
 572                     prev->vb.height == buf->vb.height &&
 573                     prev->fmt       == buf->fmt) {
 574                         list_add_tail(&buf->vb.queue, &vidq->active);
 575                         buf->vb.state = VIDEOBUF_ACTIVE;
 576                         dprintk(2, "[%p/%d] buffer_queue - append to active\n",
 577                                 buf, buf->vb.i);
 578                 } else {
 579                         list_add_tail(&buf->vb.queue, &vidq->queued);
 580                         buf->vb.state = VIDEOBUF_QUEUED;
 581                         dprintk(2, "[%p/%d] buffer_queue - first queued\n",
 582                                 buf, buf->vb.i);
 583                 }
 584         }
 585 }
 586
 587 static void buffer_release(struct videobuf_queue *vq,
 588                                 struct videobuf_buffer *vb)
 589 {
 590         struct viu_buf *buf  = container_of(vb, struct viu_buf, vb);
 591         struct viu_fh  *fh   = vq->priv_data;
 592         struct viu_dev *dev  = (struct viu_dev *)fh->dev;
 593
 594         viu_stop_dma(dev);
 595         free_buffer(vq, buf);
 596 }
 597
 598 static struct videobuf_queue_ops viu_video_qops = {
 599         .buf_setup      = buffer_setup,
 600         .buf_prepare    = buffer_prepare,
 601         .buf_queue      = buffer_queue,
 602         .buf_release    = buffer_release,
 603 };
 604
 605 /*
 606  * IOCTL vidioc handling
 607  */
 608 static int vidioc_querycap(struct file *file, void *priv,
 609                            struct v4l2_capability *cap)
 610 {
 611         strcpy(cap->driver, "viu");
 612         strcpy(cap->card, "viu");
 613         cap->version = VIU_VERSION;
 614         cap->capabilities =     V4L2_CAP_VIDEO_CAPTURE |
 615                                 V4L2_CAP_STREAMING     |
 616                                 V4L2_CAP_VIDEO_OVERLAY |
 617                                 V4L2_CAP_READWRITE;
 618         return 0;
 619 }
 620
 621 static int vidioc_enum_fmt(struct file *file, void  *priv,
 622                                         struct v4l2_fmtdesc *f)
 623 {
 624         int index = f->index;
 625
 626         if (f->index > NUM_FORMATS)
 627                 return -EINVAL;
 628
 629         strlcpy(f->description, formats[index].name, sizeof(f->description));
 630         f->pixelformat = formats[index].fourcc;
 631         return 0;
 632 }
 633
 634 static int vidioc_g_fmt_cap(struct file *file, void *priv,
 635                                         struct v4l2_format *f)
 636 {
 637         struct viu_fh *fh = priv;
 638
 639         f->fmt.pix.width        = fh->width;
 640         f->fmt.pix.height       = fh->height;
 641         f->fmt.pix.field        = fh->vb_vidq.field;
 642         f->fmt.pix.pixelformat  = fh->fmt->pixelformat;
 643         f->fmt.pix.bytesperline =
 644                         (f->fmt.pix.width * fh->fmt->depth) >> 3;
 645         f->fmt.pix.sizeimage    = fh->sizeimage;
 646         return 0;
 647 }
 648
 649 static int vidioc_try_fmt_cap(struct file *file, void *priv,
 650                                         struct v4l2_format *f)
 651 {
 652         struct viu_fmt *fmt;
 653         enum v4l2_field field;
 654         unsigned int maxw, maxh;
 655
 656         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 657         if (!fmt) {
 658                 dprintk(1, "Fourcc format (0x%08x) invalid.",
 659                         f->fmt.pix.pixelformat);
 660                 return -EINVAL;
 661         }
 662
 663         field = f->fmt.pix.field;
 664
 665         if (field == V4L2_FIELD_ANY) {
 666                 field = V4L2_FIELD_INTERLACED;
 667         } else if (field != V4L2_FIELD_INTERLACED) {
 668                 dprintk(1, "Field type invalid.\n");
 669                 return -EINVAL;
 670         }
 671
 672         maxw  = norm_maxw();
 673         maxh  = norm_maxh();
 674
 675         f->fmt.pix.field = field;
 676         if (f->fmt.pix.height < 32)
 677                 f->fmt.pix.height = 32;
 678         if (f->fmt.pix.height > maxh)
 679                 f->fmt.pix.height = maxh;
 680         if (f->fmt.pix.width < 48)
 681                 f->fmt.pix.width = 48;
 682         if (f->fmt.pix.width > maxw)
 683                 f->fmt.pix.width = maxw;
 684         f->fmt.pix.width &= ~0x03;
 685         f->fmt.pix.bytesperline =
 686                 (f->fmt.pix.width * fmt->depth) >> 3;
 687
 688         return 0;
 689 }
 690
 691 static int vidioc_s_fmt_cap(struct file *file, void *priv,
 692                                         struct v4l2_format *f)
 693 {
 694         struct viu_fh *fh = priv;
 695         int ret;
 696
 697         ret = vidioc_try_fmt_cap(file, fh, f);
 698         if (ret < 0)
 699                 return ret;
 700
 701         fh->fmt           = format_by_fourcc(f->fmt.pix.pixelformat);
 702         fh->width         = f->fmt.pix.width;
 703         fh->height        = f->fmt.pix.height;
 704         fh->sizeimage     = f->fmt.pix.sizeimage;
 705         fh->vb_vidq.field = f->fmt.pix.field;
 706         fh->type          = f->type;
 707         dprintk(1, "set to pixelformat '%4.6s'\n", (char *)&fh->fmt->name);
 708         return 0;
 709 }
 710
 711 static int vidioc_g_fmt_overlay(struct file *file, void *priv,
 712                                         struct v4l2_format *f)
 713 {
 714         struct viu_fh *fh = priv;
 715
 716         f->fmt.win = fh->win;
 717         return 0;
 718 }
 719
 720 static int verify_preview(struct viu_dev *dev, struct v4l2_window *win)
 721 {
 722         enum v4l2_field field;
 723         int maxw, maxh;
 724
 725         if (dev->ovbuf.base == NULL)
 726                 return -EINVAL;
 727         if (dev->ovfmt == NULL)
 728                 return -EINVAL;
 729         if (win->w.width < 48 || win->w.height < 32)
 730                 return -EINVAL;
 731
 732         field = win->field;
 733         maxw  = dev->crop_current.width;
 734         maxh  = dev->crop_current.height;
 735
 736         if (field == V4L2_FIELD_ANY) {
 737                 field = (win->w.height > maxh/2)
 738                         ? V4L2_FIELD_INTERLACED
 739                         : V4L2_FIELD_TOP;
 740         }
 741         switch (field) {
 742         case V4L2_FIELD_TOP:
 743         case V4L2_FIELD_BOTTOM:
 744                 maxh = maxh / 2;
 745                 break;
 746         case V4L2_FIELD_INTERLACED:
 747                 break;
 748         default:
 749                 return -EINVAL;
 750         }
 751
 752         win->field = field;
 753         if (win->w.width > maxw)
 754                 win->w.width = maxw;
 755         if (win->w.height > maxh)
 756                 win->w.height = maxh;
 757         return 0;
 758 }
 759
 760 inline void viu_activate_overlay(struct viu_reg *viu_reg)
 761 {
 762         struct viu_reg *vr = viu_reg;
 763
 764         out_be32(&vr->field_base_addr, reg_val.field_base_addr);
 765         out_be32(&vr->dma_inc, reg_val.dma_inc);
 766         out_be32(&vr->picture_count, reg_val.picture_count);
 767 }
 768
 769 static int viu_start_preview(struct viu_dev *dev, struct viu_fh *fh)
 770 {
 771         int bpp;
 772
 773         dprintk(1, "%s %dx%d %s\n", __func__,
 774                 fh->win.w.width, fh->win.w.height, dev->ovfmt->name);
 775
 776         reg_val.status_cfg = 0;
 777
 778         /* setup window */
 779         reg_val.picture_count = (fh->win.w.height / 2) << 16 |
 780                                 fh->win.w.width;
 781
 782         /* setup color depth and dma increment */
 783         bpp = dev->ovfmt->depth / 8;
 784         switch (bpp) {
 785         case 2:
 786                 reg_val.status_cfg &= ~MODE_32BIT;
 787                 reg_val.dma_inc = fh->win.w.width * 2;
 788                 break;
 789         case 4:
 790                 reg_val.status_cfg |= MODE_32BIT;
 791                 reg_val.dma_inc = fh->win.w.width * 4;
 792                 break;
 793         default:
 794                 dprintk(0, "device doesn't support color depth(%d)\n",
 795                         bpp * 8);
 796                 return -EINVAL;
 797         }
 798
 799         dev->ovfield = fh->win.field;
 800         if (!V4L2_FIELD_HAS_BOTH(dev->ovfield))
 801                 reg_val.dma_inc = 0;
 802
 803         reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
 804
 805         /* setup the base address of the overlay buffer */
 806         reg_val.field_base_addr = (u32)dev->ovbuf.base;
 807
 808         dev->ovenable = 1;
 809         viu_activate_overlay(dev->vr);
 810
 811         /* start dma */
 812         viu_start_dma(dev);
 813         return 0;
 814 }
 815
 816 static int vidioc_s_fmt_overlay(struct file *file, void *priv,
 817                                         struct v4l2_format *f)
 818 {
 819         struct viu_fh  *fh  = priv;
 820         struct viu_dev *dev = (struct viu_dev *)fh->dev;
 821         unsigned long  flags;
 822         int err;
 823
 824         err = verify_preview(dev, &f->fmt.win);
 825         if (err)
 826                 return err;
 827
 828         mutex_lock(&dev->lock);
 829         fh->win = f->fmt.win;
 830
 831         spin_lock_irqsave(&dev->slock, flags);
 832         viu_start_preview(dev, fh);
 833         spin_unlock_irqrestore(&dev->slock, flags);
 834         mutex_unlock(&dev->lock);
 835         return 0;
 836 }
 837
 838 static int vidioc_try_fmt_overlay(struct file *file, void *priv,
 839                                         struct v4l2_format *f)
 840 {
 841         return 0;
 842 }
 843
 844 int vidioc_g_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
 845 {
 846         struct viu_fh  *fh = priv;
 847         struct viu_dev *dev = fh->dev;
 848         struct v4l2_framebuffer *fb = arg;
 849
 850         *fb = dev->ovbuf;
 851         fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 852         return 0;
 853 }
 854
 855 int vidioc_s_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
 856 {
 857         struct viu_fh  *fh = priv;
 858         struct viu_dev *dev = fh->dev;
 859         struct v4l2_framebuffer *fb = arg;
 860         struct viu_fmt *fmt;
 861
 862         if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
 863                 return -EPERM;
 864
 865         /* check args */
 866         fmt = format_by_fourcc(fb->fmt.pixelformat);
 867         if (fmt == NULL)
 868                 return -EINVAL;
 869
 870         /* ok, accept it */
 871         dev->ovbuf = *fb;
 872         dev->ovfmt = fmt;
 873         if (dev->ovbuf.fmt.bytesperline == 0) {
 874                 dev->ovbuf.fmt.bytesperline =
 875                         dev->ovbuf.fmt.width * fmt->depth / 8;
 876         }
 877         return 0;
 878 }
 879
 880 static int vidioc_reqbufs(struct file *file, void *priv,
 881                                 struct v4l2_requestbuffers *p)
 882 {
 883         struct viu_fh *fh = priv;
 884
 885         return videobuf_reqbufs(&fh->vb_vidq, p);
 886 }
 887
 888 static int vidioc_querybuf(struct file *file, void *priv,
 889                                         struct v4l2_buffer *p)
 890 {
 891         struct viu_fh *fh = priv;
 892
 893         return videobuf_querybuf(&fh->vb_vidq, p);
 894 }
 895
 896 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 897 {
 898         struct viu_fh *fh = priv;
 899
 900         return videobuf_qbuf(&fh->vb_vidq, p);
 901 }
 902
 903 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 904 {
 905         struct viu_fh *fh = priv;
 906
 907         return videobuf_dqbuf(&fh->vb_vidq, p,
 908                                 file->f_flags & O_NONBLOCK);
 909 }
 910
 911 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 912 {
 913         struct viu_fh *fh = priv;
 914
 915         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 916                 return -EINVAL;
 917         if (fh->type != i)
 918                 return -EINVAL;
 919
 920         viu_start_dma(fh->dev);
 921
 922         return videobuf_streamon(&fh->vb_vidq);
 923 }
 924
 925 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 926 {
 927         struct viu_fh  *fh = priv;
 928
 929         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 930                 return -EINVAL;
 931         if (fh->type != i)
 932                 return -EINVAL;
 933
 934         viu_stop_dma(fh->dev);
 935
 936         return videobuf_streamoff(&fh->vb_vidq);
 937 }
 938
 939 #define decoder_call(viu, o, f, args...) \
 940         v4l2_subdev_call(viu->decoder, o, f, ##args)
 941
 942 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
 943 {
 944         struct viu_fh *fh = priv;
 945
 946         decoder_call(fh->dev, video, querystd, std_id);
 947         return 0;
 948 }
 949
 950 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *id)
 951 {
 952         struct viu_fh *fh = priv;
 953
 954         fh->dev->std = *id;
 955         decoder_call(fh->dev, core, s_std, *id);
 956         return 0;
 957 }
 958
 959 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
 960 {
 961         struct viu_fh *fh = priv;
 962
 963         *std_id = fh->dev->std;
 964         return 0;
 965 }
 966
 967 /* only one input in this driver */
 968 static int vidioc_enum_input(struct file *file, void *priv,
 969                                         struct v4l2_input *inp)
 970 {
 971         struct viu_fh *fh = priv;
 972
 973         if (inp->index != 0)
 974                 return -EINVAL;
 975
 976         inp->type = V4L2_INPUT_TYPE_CAMERA;
 977         inp->std = fh->dev->vdev->tvnorms;
 978         strcpy(inp->name, "Camera");
 979         return 0;
 980 }
 981
 982 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 983 {
 984         *i = 0;
 985         return 0;
 986 }
 987
 988 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 989 {
 990         struct viu_fh *fh = priv;
 991
 992         if (i > 1)
 993                 return -EINVAL;
 994
 995         decoder_call(fh->dev, video, s_routing, i, 0, 0);
 996         return 0;
 997 }
 998
 999 /* Controls */
1000 static int vidioc_queryctrl(struct file *file, void *priv,
1001                                 struct v4l2_queryctrl *qc)
1002 {
1003         int i;
1004
1005         for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1006                 if (qc->id && qc->id == viu_qctrl[i].id) {
1007                         memcpy(qc, &(viu_qctrl[i]), sizeof(*qc));
1008                         return 0;
1009                 }
1010         }
1011         return -EINVAL;
1012 }
1013
1014 static int vidioc_g_ctrl(struct file *file, void *priv,
1015                                 struct v4l2_control *ctrl)
1016 {
1017         int i;
1018
1019         for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1020                 if (ctrl->id == viu_qctrl[i].id) {
1021                         ctrl->value = qctl_regs[i];
1022                         return 0;
1023                 }
1024         }
1025         return -EINVAL;
1026 }
1027 static int vidioc_s_ctrl(struct file *file, void *priv,
1028                                 struct v4l2_control *ctrl)
1029 {
1030         int i;
1031
1032         for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1033                 if (ctrl->id == viu_qctrl[i].id) {
1034                         if (ctrl->value < viu_qctrl[i].minimum
1035                                 || ctrl->value > viu_qctrl[i].maximum)
1036                                         return -ERANGE;
1037                         qctl_regs[i] = ctrl->value;
1038                         return 0;
1039                 }
1040         }
1041         return -EINVAL;
1042 }
1043
1044 inline void viu_activate_next_buf(struct viu_dev *dev,
1045                                 struct viu_dmaqueue *viuq)
1046 {
1047         struct viu_dmaqueue *vidq = viuq;
1048         struct viu_buf *buf;
1049
1050         /* launch another DMA operation for an active/queued buffer */
1051         if (!list_empty(&vidq->active)) {
1052                 buf = list_entry(vidq->active.next, struct viu_buf,
1053                                         vb.queue);
1054                 dprintk(1, "start another queued buffer: 0x%p\n", buf);
1055                 buffer_activate(dev, buf);
1056         } else if (!list_empty(&vidq->queued)) {
1057                 buf = list_entry(vidq->queued.next, struct viu_buf,
1058                                         vb.queue);
1059                 list_del(&buf->vb.queue);
1060
1061                 dprintk(1, "start another queued buffer: 0x%p\n", buf);
1062                 list_add_tail(&buf->vb.queue, &vidq->active);
1063                 buf->vb.state = VIDEOBUF_ACTIVE;
1064                 buffer_activate(dev, buf);
1065         }
1066 }
1067
1068 inline void viu_default_settings(struct viu_reg *viu_reg)
1069 {
1070         struct viu_reg *vr = viu_reg;
1071
1072         out_be32(&vr->luminance, 0x9512A254);
1073         out_be32(&vr->chroma_r, 0x03310000);
1074         out_be32(&vr->chroma_g, 0x06600F38);
1075         out_be32(&vr->chroma_b, 0x00000409);
1076         out_be32(&vr->alpha, 0x000000ff);
1077         out_be32(&vr->req_alarm, 0x00000090);
1078         dprintk(1, "status reg: 0x%08x, field base: 0x%08x\n",
1079                 in_be32(&vr->status_cfg), in_be32(&vr->field_base_addr));
1080 }
1081
1082 static void viu_overlay_intr(struct viu_dev *dev, u32 status)
1083 {
1084         struct viu_reg *vr = dev->vr;
1085
1086         if (status & INT_DMA_END_STATUS)
1087                 dev->dma_done = 1;
1088
1089         if (status & INT_FIELD_STATUS) {
1090                 if (dev->dma_done) {
1091                         u32 addr = reg_val.field_base_addr;
1092
1093                         dev->dma_done = 0;
1094                         if (status & FIELD_NO)
1095                                 addr += reg_val.dma_inc;
1096
1097                         out_be32(&vr->field_base_addr, addr);
1098                         out_be32(&vr->dma_inc, reg_val.dma_inc);
1099                         out_be32(&vr->status_cfg,
1100                                  (status & 0xffc0ffff) |
1101                                  (status & INT_ALL_STATUS) |
1102                                  reg_val.status_cfg);
1103                 } else if (status & INT_VSYNC_STATUS) {
1104                         out_be32(&vr->status_cfg,
1105                                  (status & 0xffc0ffff) |
1106                                  (status & INT_ALL_STATUS) |
1107                                  reg_val.status_cfg);
1108                 }
1109         }
1110 }
1111
1112 static void viu_capture_intr(struct viu_dev *dev, u32 status)
1113 {
1114         struct viu_dmaqueue *vidq = &dev->vidq;
1115         struct viu_reg *vr = dev->vr;
1116         struct viu_buf *buf;
1117         int field_num;
1118         int need_two;
1119         int dma_done = 0;
1120
1121         field_num = status & FIELD_NO;
1122         need_two = V4L2_FIELD_HAS_BOTH(dev->capfield);
1123
1124         if (status & INT_DMA_END_STATUS) {
1125                 dma_done = 1;
1126                 if (((field_num == 0) && (dev->field == 0)) ||
1127                     (field_num && (dev->field == 1)))
1128                         dev->field++;
1129         }
1130
1131         if (status & INT_FIELD_STATUS) {
1132                 dprintk(1, "irq: field %d, done %d\n",
1133                         !!field_num, dma_done);
1134                 if (unlikely(dev->first)) {
1135                         if (field_num == 0) {
1136                                 dev->first = 0;
1137                                 dprintk(1, "activate first buf\n");
1138                                 viu_activate_next_buf(dev, vidq);
1139                         } else
1140                                 dprintk(1, "wait field 0\n");
1141                         return;
1142                 }
1143
1144                 /* setup buffer address for next dma operation */
1145                 if (!list_empty(&vidq->active)) {
1146                         u32 addr = reg_val.field_base_addr;
1147
1148                         if (field_num && need_two) {
1149                                 addr += reg_val.dma_inc;
1150                                 dprintk(1, "field 1, 0x%lx, dev field %d\n",
1151                                         (unsigned long)addr, dev->field);
1152                         }
1153                         out_be32(&vr->field_base_addr, addr);
1154                         out_be32(&vr->dma_inc, reg_val.dma_inc);
1155                         out_be32(&vr->status_cfg,
1156                                  (status & 0xffc0ffff) |
1157                                  (status & INT_ALL_STATUS) |
1158                                  reg_val.status_cfg);
1159                         return;
1160                 }
1161         }
1162
1163         if (dma_done && field_num && (dev->field == 2)) {
1164                 dev->field = 0;
1165                 buf = list_entry(vidq->active.next,
1166                                  struct viu_buf, vb.queue);
1167                 dprintk(1, "viu/0: [%p/%d] 0x%lx/0x%lx: dma complete\n",
1168                         buf, buf->vb.i,
1169                         (unsigned long)videobuf_to_dma_contig(&buf->vb),
1170                         (unsigned long)in_be32(&vr->field_base_addr));
1171
1172                 if (waitqueue_active(&buf->vb.done)) {
1173                         list_del(&buf->vb.queue);
1174                         do_gettimeofday(&buf->vb.ts);
1175                         buf->vb.state = VIDEOBUF_DONE;
1176                         buf->vb.field_count++;
1177                         wake_up(&buf->vb.done);
1178                 }
1179                 /* activate next dma buffer */
1180                 viu_activate_next_buf(dev, vidq);
1181         }
1182 }
1183
1184 static irqreturn_t viu_intr(int irq, void *dev_id)
1185 {
1186         struct viu_dev *dev  = (struct viu_dev *)dev_id;
1187         struct viu_reg *vr = dev->vr;
1188         u32 status;
1189         u32 error;
1190
1191         status = in_be32(&vr->status_cfg);
1192
1193         if (status & INT_ERROR_STATUS) {
1194                 dev->irqs.error_irq++;
1195                 error = status & ERR_MASK;
1196                 if (error)
1197                         dprintk(1, "Err: error(%d), times:%d!\n",
1198                                 error >> 4, dev->irqs.error_irq);
1199                 /* Clear interrupt error bit and error flags */
1200                 out_be32(&vr->status_cfg,
1201                          (status & 0xffc0ffff) | INT_ERROR_STATUS);
1202         }
1203
1204         if (status & INT_DMA_END_STATUS) {
1205                 dev->irqs.dma_end_irq++;
1206                 dev->dma_done = 1;
1207                 dprintk(2, "VIU DMA end interrupt times: %d\n",
1208                                         dev->irqs.dma_end_irq);
1209         }
1210
1211         if (status & INT_HSYNC_STATUS)
1212                 dev->irqs.hsync_irq++;
1213
1214         if (status & INT_FIELD_STATUS) {
1215                 dev->irqs.field_irq++;
1216                 dprintk(2, "VIU field interrupt times: %d\n",
1217                                         dev->irqs.field_irq);
1218         }
1219
1220         if (status & INT_VSTART_STATUS)
1221                 dev->irqs.vstart_irq++;
1222
1223         if (status & INT_VSYNC_STATUS) {
1224                 dev->irqs.vsync_irq++;
1225                 dprintk(2, "VIU vsync interrupt times: %d\n",
1226                         dev->irqs.vsync_irq);
1227         }
1228
1229         /* clear all pending irqs */
1230         status = in_be32(&vr->status_cfg);
1231         out_be32(&vr->status_cfg,
1232                  (status & 0xffc0ffff) | (status & INT_ALL_STATUS));
1233
1234         if (dev->ovenable) {
1235                 viu_overlay_intr(dev, status);
1236                 return IRQ_HANDLED;
1237         }
1238
1239         /* Capture mode */
1240         viu_capture_intr(dev, status);
1241         return IRQ_HANDLED;
1242 }
1243
1244 /*
1245  * File operations for the device
1246  */
1247 static int viu_open(struct file *file)
1248 {
1249         struct video_device *vdev = video_devdata(file);
1250         struct viu_dev *dev = video_get_drvdata(vdev);
1251         struct viu_fh *fh;
1252         struct viu_reg *vr;
1253         int minor = vdev->minor;
1254         u32 status_cfg;
1255         int i;
1256
1257         dprintk(1, "viu: open (minor=%d)\n", minor);
1258
1259         dev->users++;
1260         if (dev->users > 1) {
1261                 dev->users--;
1262                 return -EBUSY;
1263         }
1264
1265         vr = dev->vr;
1266
1267         dprintk(1, "open minor=%d type=%s users=%d\n", minor,
1268                 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
1269
1270         /* allocate and initialize per filehandle data */
1271         fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1272         if (!fh) {
1273                 dev->users--;
1274                 return -ENOMEM;
1275         }
1276
1277         file->private_data = fh;
1278         fh->dev = dev;
1279
1280         fh->type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1281         fh->fmt      = format_by_fourcc(V4L2_PIX_FMT_RGB32);
1282         fh->width    = norm_maxw();
1283         fh->height   = norm_maxh();
1284         dev->crop_current.width  = fh->width;
1285         dev->crop_current.height = fh->height;
1286
1287         /* Put all controls at a sane state */
1288         for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++)
1289                 qctl_regs[i] = viu_qctrl[i].default_value;
1290
1291         dprintk(1, "Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1292                 (unsigned long)fh, (unsigned long)dev,
1293                 (unsigned long)&dev->vidq);
1294         dprintk(1, "Open: list_empty queued=%d\n",
1295                 list_empty(&dev->vidq.queued));
1296         dprintk(1, "Open: list_empty active=%d\n",
1297                 list_empty(&dev->vidq.active));
1298
1299         viu_default_settings(vr);
1300
1301         status_cfg = in_be32(&vr->status_cfg);
1302         out_be32(&vr->status_cfg,
1303                  status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN |
1304                                 INT_FIELD_EN | INT_VSTART_EN |
1305                                 INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN));
1306
1307         status_cfg = in_be32(&vr->status_cfg);
1308         out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS);
1309
1310         spin_lock_init(&fh->vbq_lock);
1311         videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops,
1312                                        dev->dev, &fh->vbq_lock,
1313                                        fh->type, V4L2_FIELD_INTERLACED,
1314                                        sizeof(struct viu_buf), fh, NULL);
1315         return 0;
1316 }
1317
1318 static ssize_t viu_read(struct file *file, char __user *data, size_t count,
1319                         loff_t *ppos)
1320 {
1321         struct viu_fh *fh = file->private_data;
1322         struct viu_dev *dev = fh->dev;
1323         int ret = 0;
1324
1325         dprintk(2, "%s\n", __func__);
1326         if (dev->ovenable)
1327                 dev->ovenable = 0;
1328
1329         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1330                 viu_start_dma(dev);
1331                 ret = videobuf_read_stream(&fh->vb_vidq, data, count,
1332                                 ppos, 0, file->f_flags & O_NONBLOCK);
1333                 return ret;
1334         }
1335         return 0;
1336 }
1337
1338 static unsigned int viu_poll(struct file *file, struct poll_table_struct *wait)
1339 {
1340         struct viu_fh *fh = file->private_data;
1341         struct videobuf_queue *q = &fh->vb_vidq;
1342
1343         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1344                 return POLLERR;
1345
1346         return videobuf_poll_stream(file, q, wait);
1347 }
1348
1349 static int viu_release(struct file *file)
1350 {
1351         struct viu_fh *fh = file->private_data;
1352         struct viu_dev *dev = fh->dev;
1353         int minor = video_devdata(file)->minor;
1354
1355         viu_stop_dma(dev);
1356         videobuf_stop(&fh->vb_vidq);
1357         videobuf_mmap_free(&fh->vb_vidq);
1358
1359         kfree(fh);
1360
1361         dev->users--;
1362         dprintk(1, "close (minor=%d, users=%d)\n",
1363                 minor, dev->users);
1364         return 0;
1365 }
1366
1367 void viu_reset(struct viu_reg *reg)
1368 {
1369         out_be32(&reg->status_cfg, 0);
1370         out_be32(&reg->luminance, 0x9512a254);
1371         out_be32(&reg->chroma_r, 0x03310000);
1372         out_be32(&reg->chroma_g, 0x06600f38);
1373         out_be32(&reg->chroma_b, 0x00000409);
1374         out_be32(&reg->field_base_addr, 0);
1375         out_be32(&reg->dma_inc, 0);
1376         out_be32(&reg->picture_count, 0x01e002d0);
1377         out_be32(&reg->req_alarm, 0x00000090);
1378         out_be32(&reg->alpha, 0x000000ff);
1379 }
1380
1381 static int viu_mmap(struct file *file, struct vm_area_struct *vma)
1382 {
1383         struct viu_fh *fh = file->private_data;
1384         int ret;
1385
1386         dprintk(1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1387
1388         ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1389
1390         dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1391                 (unsigned long)vma->vm_start,
1392                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1393                 ret);
1394
1395         return ret;
1396 }
1397
1398 static struct v4l2_file_operations viu_fops = {
1399         .owner          = THIS_MODULE,
1400         .open           = viu_open,
1401         .release        = viu_release,
1402         .read           = viu_read,
1403         .poll           = viu_poll,
1404         .ioctl          = video_ioctl2, /* V4L2 ioctl handler */
1405         .mmap           = viu_mmap,
1406 };
1407
1408 static const struct v4l2_ioctl_ops viu_ioctl_ops = {
1409         .vidioc_querycap        = vidioc_querycap,
1410         .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt,
1411         .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_cap,
1412         .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_cap,
1413         .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_cap,
1414         .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt,
1415         .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay,
1416         .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay,
1417         .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay,
1418         .vidioc_g_fbuf        = vidioc_g_fbuf,
1419         .vidioc_s_fbuf        = vidioc_s_fbuf,
1420         .vidioc_reqbufs       = vidioc_reqbufs,
1421         .vidioc_querybuf      = vidioc_querybuf,
1422         .vidioc_qbuf          = vidioc_qbuf,
1423         .vidioc_dqbuf         = vidioc_dqbuf,
1424         .vidioc_g_std         = vidioc_g_std,
1425         .vidioc_s_std         = vidioc_s_std,
1426         .vidioc_querystd      = vidioc_querystd,
1427         .vidioc_enum_input    = vidioc_enum_input,
1428         .vidioc_g_input       = vidioc_g_input,
1429         .vidioc_s_input       = vidioc_s_input,
1430         .vidioc_queryctrl     = vidioc_queryctrl,
1431         .vidioc_g_ctrl        = vidioc_g_ctrl,
1432         .vidioc_s_ctrl        = vidioc_s_ctrl,
1433         .vidioc_streamon      = vidioc_streamon,
1434         .vidioc_streamoff     = vidioc_streamoff,
1435 };
1436
1437 static struct video_device viu_template = {
1438         .name           = "FSL viu",
1439         .fops           = &viu_fops,
1440         .minor          = -1,
1441         .ioctl_ops      = &viu_ioctl_ops,
1442         .release        = video_device_release,
1443
1444         .tvnorms        = V4L2_STD_NTSC_M | V4L2_STD_PAL,
1445         .current_norm   = V4L2_STD_NTSC_M,
1446 };
1447
1448 static int __devinit viu_of_probe(struct platform_device *op)
1449 {
1450         struct viu_dev *viu_dev;
1451         struct video_device *vdev;
1452         struct resource r;
1453         struct viu_reg __iomem *viu_regs;
1454         struct i2c_adapter *ad;
1455         int ret, viu_irq;
1456
1457         ret = of_address_to_resource(op->dev.of_node, 0, &r);
1458         if (ret) {
1459                 dev_err(&op->dev, "Can't parse device node resource\n");
1460                 return -ENODEV;
1461         }
1462
1463         viu_irq = irq_of_parse_and_map(op->dev.of_node, 0);
1464         if (viu_irq == NO_IRQ) {
1465                 dev_err(&op->dev, "Error while mapping the irq\n");
1466                 return -EINVAL;
1467         }
1468
1469         /* request mem region */
1470         if (!devm_request_mem_region(&op->dev, r.start,
1471                                      sizeof(struct viu_reg), DRV_NAME)) {
1472                 dev_err(&op->dev, "Error while requesting mem region\n");
1473                 ret = -EBUSY;
1474                 goto err;
1475         }
1476
1477         /* remap registers */
1478         viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg));
1479         if (!viu_regs) {
1480                 dev_err(&op->dev, "Can't map register set\n");
1481                 ret = -ENOMEM;
1482                 goto err;
1483         }
1484
1485         /* Prepare our private structure */
1486         viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC);
1487         if (!viu_dev) {
1488                 dev_err(&op->dev, "Can't allocate private structure\n");
1489                 ret = -ENOMEM;
1490                 goto err;
1491         }
1492
1493         viu_dev->vr = viu_regs;
1494         viu_dev->irq = viu_irq;
1495         viu_dev->dev = &op->dev;
1496
1497         /* init video dma queues */
1498         INIT_LIST_HEAD(&viu_dev->vidq.active);
1499         INIT_LIST_HEAD(&viu_dev->vidq.queued);
1500
1501         /* initialize locks */
1502         mutex_init(&viu_dev->lock);
1503
1504         snprintf(viu_dev->v4l2_dev.name,
1505                  sizeof(viu_dev->v4l2_dev.name), "%s", "VIU");
1506         ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev);
1507         if (ret < 0) {
1508                 dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret);
1509                 goto err;
1510         }
1511
1512         ad = i2c_get_adapter(0);
1513         viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad,
1514                         "saa7113", VIU_VIDEO_DECODER_ADDR, NULL);
1515
1516         viu_dev->vidq.timeout.function = viu_vid_timeout;
1517         viu_dev->vidq.timeout.data     = (unsigned long)viu_dev;
1518         init_timer(&viu_dev->vidq.timeout);
1519         viu_dev->first = 1;
1520
1521         /* Allocate memory for video device */
1522         vdev = video_device_alloc();
1523         if (vdev == NULL) {
1524                 ret = -ENOMEM;
1525                 goto err_vdev;
1526         }
1527
1528         memcpy(vdev, &viu_template, sizeof(viu_template));
1529
1530         vdev->v4l2_dev = &viu_dev->v4l2_dev;
1531
1532         viu_dev->vdev = vdev;
1533
1534         video_set_drvdata(viu_dev->vdev, viu_dev);
1535
1536         ret = video_register_device(viu_dev->vdev, VFL_TYPE_GRABBER, -1);
1537         if (ret < 0) {
1538                 video_device_release(viu_dev->vdev);
1539                 goto err_vdev;
1540         }
1541
1542         /* enable VIU clock */
1543         viu_dev->clk = clk_get(&op->dev, "viu_clk");
1544         if (IS_ERR(viu_dev->clk)) {
1545                 dev_err(&op->dev, "failed to find the clock module!\n");
1546                 ret = -ENODEV;
1547                 goto err_clk;
1548         } else {
1549                 clk_enable(viu_dev->clk);
1550         }
1551
1552         /* reset VIU module */
1553         viu_reset(viu_dev->vr);
1554
1555         /* install interrupt handler */
1556         if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) {
1557                 dev_err(&op->dev, "Request VIU IRQ failed.\n");
1558                 ret = -ENODEV;
1559                 goto err_irq;
1560         }
1561
1562         dev_info(&op->dev, "Freescale VIU Video Capture Board\n");
1563         return ret;
1564
1565 err_irq:
1566         clk_disable(viu_dev->clk);
1567         clk_put(viu_dev->clk);
1568 err_clk:
1569         video_unregister_device(viu_dev->vdev);
1570 err_vdev:
1571         i2c_put_adapter(ad);
1572         v4l2_device_unregister(&viu_dev->v4l2_dev);
1573 err:
1574         irq_dispose_mapping(viu_irq);
1575         return ret;
1576 }
1577
1578 static int __devexit viu_of_remove(struct platform_device *op)
1579 {
1580         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1581         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1582         struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next,
1583                                               struct v4l2_subdev, list);
1584         struct i2c_client *client = v4l2_get_subdevdata(sdev);
1585
1586         free_irq(dev->irq, (void *)dev);
1587         irq_dispose_mapping(dev->irq);
1588
1589         clk_disable(dev->clk);
1590         clk_put(dev->clk);
1591
1592         video_unregister_device(dev->vdev);
1593         i2c_put_adapter(client->adapter);
1594         v4l2_device_unregister(&dev->v4l2_dev);
1595         return 0;
1596 }
1597
1598 #ifdef CONFIG_PM
1599 static int viu_suspend(struct platform_device *op, pm_message_t state)
1600 {
1601         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1602         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1603
1604         clk_disable(dev->clk);
1605         return 0;
1606 }
1607
1608 static int viu_resume(struct platform_device *op)
1609 {
1610         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1611         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1612
1613         clk_enable(dev->clk);
1614         return 0;
1615 }
1616 #endif
1617
1618 /*
1619  * Initialization and module stuff
1620  */
1621 static struct of_device_id mpc512x_viu_of_match[] = {
1622         {
1623                 .compatible = "fsl,mpc5121-viu",
1624         },
1625         {},
1626 };
1627 MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match);
1628
1629 static struct platform_driver viu_of_platform_driver = {
1630         .probe = viu_of_probe,
1631         .remove = __devexit_p(viu_of_remove),
1632 #ifdef CONFIG_PM
1633         .suspend = viu_suspend,
1634         .resume = viu_resume,
1635 #endif
1636         .driver = {
1637                 .name = DRV_NAME,
1638                 .owner = THIS_MODULE,
1639                 .of_match_table = mpc512x_viu_of_match,
1640         },
1641 };
1642
1643 static int __init viu_init(void)
1644 {
1645         return platform_driver_register(&viu_of_platform_driver);
1646 }
1647
1648 static void __exit viu_exit(void)
1649 {
1650         platform_driver_unregister(&viu_of_platform_driver);
1651 }
1652
1653 module_init(viu_init);
1654 module_exit(viu_exit);
1655
1656 MODULE_DESCRIPTION("Freescale Video-In(VIU)");
1657 MODULE_AUTHOR("Hongjun Chen");
1658 MODULE_LICENSE("GPL");