drivers/media/platform/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 <[email protected]>
   7  *           Porting to 2.6.35 by DENX Software Engineering,
   8  *           Anatolij Gustschin <[email protected]>
   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 <media/v4l2-common.h>
  27 #include <media/v4l2-device.h>
  28 #include <media/v4l2-ioctl.h>
  29 #include <media/videobuf-dma-contig.h>
  30
  31 #define DRV_NAME                "fsl_viu"
  32 #define VIU_VERSION             "0.5.1"
  33
  34 #define BUFFER_TIMEOUT          msecs_to_jiffies(500)  /* 0.5 seconds */
  35
  36 #define VIU_VID_MEM_LIMIT       4       /* Video memory limit, in Mb */
  37
  38 /* I2C address of video decoder chip is 0x4A */
  39 #define VIU_VIDEO_DECODER_ADDR  0x25
  40
  41 /* supported controls */
  42 static struct v4l2_queryctrl viu_qctrl[] = {
  43         {
  44                 .id            = V4L2_CID_BRIGHTNESS,
  45                 .type          = V4L2_CTRL_TYPE_INTEGER,
  46                 .name          = "Brightness",
  47                 .minimum       = 0,
  48                 .maximum       = 255,
  49                 .step          = 1,
  50                 .default_value = 127,
  51                 .flags         = 0,
  52         }, {
  53                 .id            = V4L2_CID_CONTRAST,
  54                 .type          = V4L2_CTRL_TYPE_INTEGER,
  55                 .name          = "Contrast",
  56                 .minimum       = 0,
  57                 .maximum       = 255,
  58                 .step          = 0x1,
  59                 .default_value = 0x10,
  60                 .flags         = 0,
  61         }, {
  62                 .id            = V4L2_CID_SATURATION,
  63                 .type          = V4L2_CTRL_TYPE_INTEGER,
  64                 .name          = "Saturation",
  65                 .minimum       = 0,
  66                 .maximum       = 255,
  67                 .step          = 0x1,
  68                 .default_value = 127,
  69                 .flags         = 0,
  70         }, {
  71                 .id            = V4L2_CID_HUE,
  72                 .type          = V4L2_CTRL_TYPE_INTEGER,
  73                 .name          = "Hue",
  74                 .minimum       = -128,
  75                 .maximum       = 127,
  76                 .step          = 0x1,
  77                 .default_value = 0,
  78                 .flags         = 0,
  79         }
  80 };
  81
  82 static int qctl_regs[ARRAY_SIZE(viu_qctrl)];
  83
  84 static int info_level;
  85
  86 #define dprintk(level, fmt, arg...)                                     \
  87         do {                                                            \
  88                 if (level <= info_level)                                \
  89                         printk(KERN_DEBUG "viu: " fmt , ## arg);        \
  90         } while (0)
  91
  92 /*
  93  * Basic structures
  94  */
  95 struct viu_fmt {
  96         char  name[32];
  97         u32   fourcc;           /* v4l2 format id */
  98         u32   pixelformat;
  99         int   depth;
 100 };
 101
 102 static struct viu_fmt formats[] = {
 103         {
 104                 .name           = "RGB-16 (5/B-6/G-5/R)",
 105                 .fourcc         = V4L2_PIX_FMT_RGB565,
 106                 .pixelformat    = V4L2_PIX_FMT_RGB565,
 107                 .depth          = 16,
 108         }, {
 109                 .name           = "RGB-32 (A-R-G-B)",
 110                 .fourcc         = V4L2_PIX_FMT_RGB32,
 111                 .pixelformat    = V4L2_PIX_FMT_RGB32,
 112                 .depth          = 32,
 113         }
 114 };
 115
 116 struct viu_dev;
 117 struct viu_buf;
 118
 119 /* buffer for one video frame */
 120 struct viu_buf {
 121         /* common v4l buffer stuff -- must be first */
 122         struct videobuf_buffer vb;
 123         struct viu_fmt *fmt;
 124 };
 125
 126 struct viu_dmaqueue {
 127         struct viu_dev          *dev;
 128         struct list_head        active;
 129         struct list_head        queued;
 130         struct timer_list       timeout;
 131 };
 132
 133 struct viu_status {
 134         u32 field_irq;
 135         u32 vsync_irq;
 136         u32 hsync_irq;
 137         u32 vstart_irq;
 138         u32 dma_end_irq;
 139         u32 error_irq;
 140 };
 141
 142 struct viu_reg {
 143         u32 status_cfg;
 144         u32 luminance;
 145         u32 chroma_r;
 146         u32 chroma_g;
 147         u32 chroma_b;
 148         u32 field_base_addr;
 149         u32 dma_inc;
 150         u32 picture_count;
 151         u32 req_alarm;
 152         u32 alpha;
 153 } __attribute__ ((packed));
 154
 155 struct viu_dev {
 156         struct v4l2_device      v4l2_dev;
 157         struct mutex            lock;
 158         spinlock_t              slock;
 159         int                     users;
 160
 161         struct device           *dev;
 162         /* various device info */
 163         struct video_device     *vdev;
 164         struct viu_dmaqueue     vidq;
 165         enum v4l2_field         capfield;
 166         int                     field;
 167         int                     first;
 168         int                     dma_done;
 169
 170         /* Hardware register area */
 171         struct viu_reg          *vr;
 172
 173         /* Interrupt vector */
 174         int                     irq;
 175         struct viu_status       irqs;
 176
 177         /* video overlay */
 178         struct v4l2_framebuffer ovbuf;
 179         struct viu_fmt          *ovfmt;
 180         unsigned int            ovenable;
 181         enum v4l2_field         ovfield;
 182
 183         /* crop */
 184         struct v4l2_rect        crop_current;
 185
 186         /* clock pointer */
 187         struct clk              *clk;
 188
 189         /* decoder */
 190         struct v4l2_subdev      *decoder;
 191
 192         v4l2_std_id             std;
 193 };
 194
 195 struct viu_fh {
 196         struct viu_dev          *dev;
 197
 198         /* video capture */
 199         struct videobuf_queue   vb_vidq;
 200         spinlock_t              vbq_lock; /* spinlock for the videobuf queue */
 201
 202         /* video overlay */
 203         struct v4l2_window      win;
 204         struct v4l2_clip        clips[1];
 205
 206         /* video capture */
 207         struct viu_fmt          *fmt;
 208         int                     width, height, sizeimage;
 209         enum v4l2_buf_type      type;
 210 };
 211
 212 static struct viu_reg reg_val;
 213
 214 /*
 215  * Macro definitions of VIU registers
 216  */
 217
 218 /* STATUS_CONFIG register */
 219 enum status_config {
 220         SOFT_RST                = 1 << 0,
 221
 222         ERR_MASK                = 0x0f << 4,    /* Error code mask */
 223         ERR_NO                  = 0x00,         /* No error */
 224         ERR_DMA_V               = 0x01 << 4,    /* DMA in vertical active */
 225         ERR_DMA_VB              = 0x02 << 4,    /* DMA in vertical blanking */
 226         ERR_LINE_TOO_LONG       = 0x04 << 4,    /* Line too long */
 227         ERR_TOO_MANG_LINES      = 0x05 << 4,    /* Too many lines in field */
 228         ERR_LINE_TOO_SHORT      = 0x06 << 4,    /* Line too short */
 229         ERR_NOT_ENOUGH_LINE     = 0x07 << 4,    /* Not enough lines in field */
 230         ERR_FIFO_OVERFLOW       = 0x08 << 4,    /* FIFO overflow */
 231         ERR_FIFO_UNDERFLOW      = 0x09 << 4,    /* FIFO underflow */
 232         ERR_1bit_ECC            = 0x0a << 4,    /* One bit ECC error */
 233         ERR_MORE_ECC            = 0x0b << 4,    /* Two/more bits ECC error */
 234
 235         INT_FIELD_EN            = 0x01 << 8,    /* Enable field interrupt */
 236         INT_VSYNC_EN            = 0x01 << 9,    /* Enable vsync interrupt */
 237         INT_HSYNC_EN            = 0x01 << 10,   /* Enable hsync interrupt */
 238         INT_VSTART_EN           = 0x01 << 11,   /* Enable vstart interrupt */
 239         INT_DMA_END_EN          = 0x01 << 12,   /* Enable DMA end interrupt */
 240         INT_ERROR_EN            = 0x01 << 13,   /* Enable error interrupt */
 241         INT_ECC_EN              = 0x01 << 14,   /* Enable ECC interrupt */
 242
 243         INT_FIELD_STATUS        = 0x01 << 16,   /* field interrupt status */
 244         INT_VSYNC_STATUS        = 0x01 << 17,   /* vsync interrupt status */
 245         INT_HSYNC_STATUS        = 0x01 << 18,   /* hsync interrupt status */
 246         INT_VSTART_STATUS       = 0x01 << 19,   /* vstart interrupt status */
 247         INT_DMA_END_STATUS      = 0x01 << 20,   /* DMA end interrupt status */
 248         INT_ERROR_STATUS        = 0x01 << 21,   /* error interrupt status */
 249
 250         DMA_ACT                 = 0x01 << 27,   /* Enable DMA transfer */
 251         FIELD_NO                = 0x01 << 28,   /* Field number */
 252         DITHER_ON               = 0x01 << 29,   /* Dithering is on */
 253         ROUND_ON                = 0x01 << 30,   /* Round is on */
 254         MODE_32BIT              = 0x01 << 31,   /* Data in RGBa888,
 255                                                  * 0 in RGB565
 256                                                  */
 257 };
 258
 259 #define norm_maxw()     720
 260 #define norm_maxh()     576
 261
 262 #define INT_ALL_STATUS  (INT_FIELD_STATUS | INT_VSYNC_STATUS | \
 263                          INT_HSYNC_STATUS | INT_VSTART_STATUS | \
 264                          INT_DMA_END_STATUS | INT_ERROR_STATUS)
 265
 266 #define NUM_FORMATS     ARRAY_SIZE(formats)
 267
 268 static irqreturn_t viu_intr(int irq, void *dev_id);
 269
 270 struct viu_fmt *format_by_fourcc(int fourcc)
 271 {
 272         int i;
 273
 274         for (i = 0; i < NUM_FORMATS; i++) {
 275                 if (formats[i].pixelformat == fourcc)
 276                         return formats + i;
 277         }
 278
 279         dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
 280         return NULL;
 281 }
 282
 283 void viu_start_dma(struct viu_dev *dev)
 284 {
 285         struct viu_reg *vr = dev->vr;
 286
 287         dev->field = 0;
 288
 289         /* Enable DMA operation */
 290         out_be32(&vr->status_cfg, SOFT_RST);
 291         out_be32(&vr->status_cfg, INT_FIELD_EN);
 292 }
 293
 294 void viu_stop_dma(struct viu_dev *dev)
 295 {
 296         struct viu_reg *vr = dev->vr;
 297         int cnt = 100;
 298         u32 status_cfg;
 299
 300         out_be32(&vr->status_cfg, 0);
 301
 302         /* Clear pending interrupts */
 303         status_cfg = in_be32(&vr->status_cfg);
 304         if (status_cfg & 0x3f0000)
 305                 out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
 306
 307         if (status_cfg & DMA_ACT) {
 308                 do {
 309                         status_cfg = in_be32(&vr->status_cfg);
 310                         if (status_cfg & INT_DMA_END_STATUS)
 311                                 break;
 312                 } while (cnt--);
 313
 314                 if (cnt < 0) {
 315                         /* timed out, issue soft reset */
 316                         out_be32(&vr->status_cfg, SOFT_RST);
 317                         out_be32(&vr->status_cfg, 0);
 318                 } else {
 319                         /* clear DMA_END and other pending irqs */
 320                         out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
 321                 }
 322         }
 323
 324         dev->field = 0;
 325 }
 326
 327 static int restart_video_queue(struct viu_dmaqueue *vidq)
 328 {
 329         struct viu_buf *buf, *prev;
 330
 331         dprintk(1, "%s vidq=0x%08lx\n", __func__, (unsigned long)vidq);
 332         if (!list_empty(&vidq->active)) {
 333                 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
 334                 dprintk(2, "restart_queue [%p/%d]: restart dma\n",
 335                         buf, buf->vb.i);
 336
 337                 viu_stop_dma(vidq->dev);
 338
 339                 /* cancel all outstanding capture requests */
 340                 list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) {
 341                         list_del(&buf->vb.queue);
 342                         buf->vb.state = VIDEOBUF_ERROR;
 343                         wake_up(&buf->vb.done);
 344                 }
 345                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 346                 return 0;
 347         }
 348
 349         prev = NULL;
 350         for (;;) {
 351                 if (list_empty(&vidq->queued))
 352                         return 0;
 353                 buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue);
 354                 if (prev == NULL) {
 355                         list_move_tail(&buf->vb.queue, &vidq->active);
 356
 357                         dprintk(1, "Restarting video dma\n");
 358                         viu_stop_dma(vidq->dev);
 359                         viu_start_dma(vidq->dev);
 360
 361                         buf->vb.state = VIDEOBUF_ACTIVE;
 362                         mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 363                         dprintk(2, "[%p/%d] restart_queue - first active\n",
 364                                 buf, buf->vb.i);
 365
 366                 } else if (prev->vb.width  == buf->vb.width  &&
 367                            prev->vb.height == buf->vb.height &&
 368                            prev->fmt       == buf->fmt) {
 369                         list_move_tail(&buf->vb.queue, &vidq->active);
 370                         buf->vb.state = VIDEOBUF_ACTIVE;
 371                         dprintk(2, "[%p/%d] restart_queue - move to active\n",
 372                                 buf, buf->vb.i);
 373                 } else {
 374                         return 0;
 375                 }
 376                 prev = buf;
 377         }
 378 }
 379
 380 static void viu_vid_timeout(unsigned long data)
 381 {
 382         struct viu_dev *dev = (struct viu_dev *)data;
 383         struct viu_buf *buf;
 384         struct viu_dmaqueue *vidq = &dev->vidq;
 385
 386         while (!list_empty(&vidq->active)) {
 387                 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
 388                 list_del(&buf->vb.queue);
 389                 buf->vb.state = VIDEOBUF_ERROR;
 390                 wake_up(&buf->vb.done);
 391                 dprintk(1, "viu/0: [%p/%d] timeout\n", buf, buf->vb.i);
 392         }
 393
 394         restart_video_queue(vidq);
 395 }
 396
 397 /*
 398  * Videobuf operations
 399  */
 400 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
 401                         unsigned int *size)
 402 {
 403         struct viu_fh *fh = vq->priv_data;
 404
 405         *size = fh->width * fh->height * fh->fmt->depth >> 3;
 406         if (*count == 0)
 407                 *count = 32;
 408
 409         while (*size * *count > VIU_VID_MEM_LIMIT * 1024 * 1024)
 410                 (*count)--;
 411
 412         dprintk(1, "%s, count=%d, size=%d\n", __func__, *count, *size);
 413         return 0;
 414 }
 415
 416 static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
 417 {
 418         struct videobuf_buffer *vb = &buf->vb;
 419         void *vaddr = NULL;
 420
 421         BUG_ON(in_interrupt());
 422
 423         videobuf_waiton(vq, &buf->vb, 0, 0);
 424
 425         if (vq->int_ops && vq->int_ops->vaddr)
 426                 vaddr = vq->int_ops->vaddr(vb);
 427
 428         if (vaddr)
 429                 videobuf_dma_contig_free(vq, &buf->vb);
 430
 431         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 432 }
 433
 434 inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf)
 435 {
 436         struct viu_reg *vr = dev->vr;
 437         int bpp;
 438
 439         /* setup the DMA base address */
 440         reg_val.field_base_addr = videobuf_to_dma_contig(&buf->vb);
 441
 442         dprintk(1, "buffer_activate [%p/%d]: dma addr 0x%lx\n",
 443                 buf, buf->vb.i, (unsigned long)reg_val.field_base_addr);
 444
 445         /* interlace is on by default, set horizontal DMA increment */
 446         reg_val.status_cfg = 0;
 447         bpp = buf->fmt->depth >> 3;
 448         switch (bpp) {
 449         case 2:
 450                 reg_val.status_cfg &= ~MODE_32BIT;
 451                 reg_val.dma_inc = buf->vb.width * 2;
 452                 break;
 453         case 4:
 454                 reg_val.status_cfg |= MODE_32BIT;
 455                 reg_val.dma_inc = buf->vb.width * 4;
 456                 break;
 457         default:
 458                 dprintk(0, "doesn't support color depth(%d)\n",
 459                         bpp * 8);
 460                 return -EINVAL;
 461         }
 462
 463         /* setup picture_count register */
 464         reg_val.picture_count = (buf->vb.height / 2) << 16 |
 465                                 buf->vb.width;
 466
 467         reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
 468
 469         buf->vb.state = VIDEOBUF_ACTIVE;
 470         dev->capfield = buf->vb.field;
 471
 472         /* reset dma increment if needed */
 473         if (!V4L2_FIELD_HAS_BOTH(buf->vb.field))
 474                 reg_val.dma_inc = 0;
 475
 476         out_be32(&vr->dma_inc, reg_val.dma_inc);
 477         out_be32(&vr->picture_count, reg_val.picture_count);
 478         out_be32(&vr->field_base_addr, reg_val.field_base_addr);
 479         mod_timer(&dev->vidq.timeout, jiffies + BUFFER_TIMEOUT);
 480         return 0;
 481 }
 482
 483 static int buffer_prepare(struct videobuf_queue *vq,
 484                           struct videobuf_buffer *vb,
 485                           enum v4l2_field field)
 486 {
 487         struct viu_fh  *fh  = vq->priv_data;
 488         struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
 489         int rc;
 490
 491         BUG_ON(fh->fmt == NULL);
 492
 493         if (fh->width  < 48 || fh->width  > norm_maxw() ||
 494             fh->height < 32 || fh->height > norm_maxh())
 495                 return -EINVAL;
 496         buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
 497         if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size)
 498                 return -EINVAL;
 499
 500         if (buf->fmt       != fh->fmt    ||
 501             buf->vb.width  != fh->width  ||
 502             buf->vb.height != fh->height ||
 503             buf->vb.field  != field) {
 504                 buf->fmt       = fh->fmt;
 505                 buf->vb.width  = fh->width;
 506                 buf->vb.height = fh->height;
 507                 buf->vb.field  = field;
 508         }
 509
 510         if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
 511                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 512                 if (rc != 0)
 513                         goto fail;
 514
 515                 buf->vb.width  = fh->width;
 516                 buf->vb.height = fh->height;
 517                 buf->vb.field  = field;
 518                 buf->fmt       = fh->fmt;
 519         }
 520
 521         buf->vb.state = VIDEOBUF_PREPARED;
 522         return 0;
 523
 524 fail:
 525         free_buffer(vq, buf);
 526         return rc;
 527 }
 528
 529 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 530 {
 531         struct viu_buf       *buf     = container_of(vb, struct viu_buf, vb);
 532         struct viu_fh        *fh      = vq->priv_data;
 533         struct viu_dev       *dev     = fh->dev;
 534         struct viu_dmaqueue  *vidq    = &dev->vidq;
 535         struct viu_buf       *prev;
 536
 537         if (!list_empty(&vidq->queued)) {
 538                 dprintk(1, "adding vb queue=0x%08lx\n",
 539                                 (unsigned long)&buf->vb.queue);
 540                 dprintk(1, "vidq pointer 0x%p, queued 0x%p\n",
 541                                 vidq, &vidq->queued);
 542                 dprintk(1, "dev %p, queued: self %p, next %p, head %p\n",
 543                         dev, &vidq->queued, vidq->queued.next,
 544                         vidq->queued.prev);
 545                 list_add_tail(&buf->vb.queue, &vidq->queued);
 546                 buf->vb.state = VIDEOBUF_QUEUED;
 547                 dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
 548                         buf, buf->vb.i);
 549         } else if (list_empty(&vidq->active)) {
 550                 dprintk(1, "adding vb active=0x%08lx\n",
 551                                 (unsigned long)&buf->vb.queue);
 552                 list_add_tail(&buf->vb.queue, &vidq->active);
 553                 buf->vb.state = VIDEOBUF_ACTIVE;
 554                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 555                 dprintk(2, "[%p/%d] buffer_queue - first active\n",
 556                         buf, buf->vb.i);
 557
 558                 buffer_activate(dev, buf);
 559         } else {
 560                 dprintk(1, "adding vb queue2=0x%08lx\n",
 561                                 (unsigned long)&buf->vb.queue);
 562                 prev = list_entry(vidq->active.prev, struct viu_buf, vb.queue);
 563                 if (prev->vb.width  == buf->vb.width  &&
 564                     prev->vb.height == buf->vb.height &&
 565                     prev->fmt       == buf->fmt) {
 566                         list_add_tail(&buf->vb.queue, &vidq->active);
 567                         buf->vb.state = VIDEOBUF_ACTIVE;
 568                         dprintk(2, "[%p/%d] buffer_queue - append to active\n",
 569                                 buf, buf->vb.i);
 570                 } else {
 571                         list_add_tail(&buf->vb.queue, &vidq->queued);
 572                         buf->vb.state = VIDEOBUF_QUEUED;
 573                         dprintk(2, "[%p/%d] buffer_queue - first queued\n",
 574                                 buf, buf->vb.i);
 575                 }
 576         }
 577 }
 578
 579 static void buffer_release(struct videobuf_queue *vq,
 580                                 struct videobuf_buffer *vb)
 581 {
 582         struct viu_buf *buf  = container_of(vb, struct viu_buf, vb);
 583         struct viu_fh  *fh   = vq->priv_data;
 584         struct viu_dev *dev  = (struct viu_dev *)fh->dev;
 585
 586         viu_stop_dma(dev);
 587         free_buffer(vq, buf);
 588 }
 589
 590 static struct videobuf_queue_ops viu_video_qops = {
 591         .buf_setup      = buffer_setup,
 592         .buf_prepare    = buffer_prepare,
 593         .buf_queue      = buffer_queue,
 594         .buf_release    = buffer_release,
 595 };
 596
 597 /*
 598  * IOCTL vidioc handling
 599  */
 600 static int vidioc_querycap(struct file *file, void *priv,
 601                            struct v4l2_capability *cap)
 602 {
 603         strcpy(cap->driver, "viu");
 604         strcpy(cap->card, "viu");
 605         cap->capabilities =     V4L2_CAP_VIDEO_CAPTURE |
 606                                 V4L2_CAP_STREAMING     |
 607                                 V4L2_CAP_VIDEO_OVERLAY |
 608                                 V4L2_CAP_READWRITE;
 609         return 0;
 610 }
 611
 612 static int vidioc_enum_fmt(struct file *file, void  *priv,
 613                                         struct v4l2_fmtdesc *f)
 614 {
 615         int index = f->index;
 616
 617         if (f->index > NUM_FORMATS)
 618                 return -EINVAL;
 619
 620         strlcpy(f->description, formats[index].name, sizeof(f->description));
 621         f->pixelformat = formats[index].fourcc;
 622         return 0;
 623 }
 624
 625 static int vidioc_g_fmt_cap(struct file *file, void *priv,
 626                                         struct v4l2_format *f)
 627 {
 628         struct viu_fh *fh = priv;
 629
 630         f->fmt.pix.width        = fh->width;
 631         f->fmt.pix.height       = fh->height;
 632         f->fmt.pix.field        = fh->vb_vidq.field;
 633         f->fmt.pix.pixelformat  = fh->fmt->pixelformat;
 634         f->fmt.pix.bytesperline =
 635                         (f->fmt.pix.width * fh->fmt->depth) >> 3;
 636         f->fmt.pix.sizeimage    = fh->sizeimage;
 637         return 0;
 638 }
 639
 640 static int vidioc_try_fmt_cap(struct file *file, void *priv,
 641                                         struct v4l2_format *f)
 642 {
 643         struct viu_fmt *fmt;
 644         enum v4l2_field field;
 645         unsigned int maxw, maxh;
 646
 647         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 648         if (!fmt) {
 649                 dprintk(1, "Fourcc format (0x%08x) invalid.",
 650                         f->fmt.pix.pixelformat);
 651                 return -EINVAL;
 652         }
 653
 654         field = f->fmt.pix.field;
 655
 656         if (field == V4L2_FIELD_ANY) {
 657                 field = V4L2_FIELD_INTERLACED;
 658         } else if (field != V4L2_FIELD_INTERLACED) {
 659                 dprintk(1, "Field type invalid.\n");
 660                 return -EINVAL;
 661         }
 662
 663         maxw  = norm_maxw();
 664         maxh  = norm_maxh();
 665
 666         f->fmt.pix.field = field;
 667         if (f->fmt.pix.height < 32)
 668                 f->fmt.pix.height = 32;
 669         if (f->fmt.pix.height > maxh)
 670                 f->fmt.pix.height = maxh;
 671         if (f->fmt.pix.width < 48)
 672                 f->fmt.pix.width = 48;
 673         if (f->fmt.pix.width > maxw)
 674                 f->fmt.pix.width = maxw;
 675         f->fmt.pix.width &= ~0x03;
 676         f->fmt.pix.bytesperline =
 677                 (f->fmt.pix.width * fmt->depth) >> 3;
 678
 679         return 0;
 680 }
 681
 682 static int vidioc_s_fmt_cap(struct file *file, void *priv,
 683                                         struct v4l2_format *f)
 684 {
 685         struct viu_fh *fh = priv;
 686         int ret;
 687
 688         ret = vidioc_try_fmt_cap(file, fh, f);
 689         if (ret < 0)
 690                 return ret;
 691
 692         fh->fmt           = format_by_fourcc(f->fmt.pix.pixelformat);
 693         fh->width         = f->fmt.pix.width;
 694         fh->height        = f->fmt.pix.height;
 695         fh->sizeimage     = f->fmt.pix.sizeimage;
 696         fh->vb_vidq.field = f->fmt.pix.field;
 697         fh->type          = f->type;
 698         dprintk(1, "set to pixelformat '%4.6s'\n", (char *)&fh->fmt->name);
 699         return 0;
 700 }
 701
 702 static int vidioc_g_fmt_overlay(struct file *file, void *priv,
 703                                         struct v4l2_format *f)
 704 {
 705         struct viu_fh *fh = priv;
 706
 707         f->fmt.win = fh->win;
 708         return 0;
 709 }
 710
 711 static int verify_preview(struct viu_dev *dev, struct v4l2_window *win)
 712 {
 713         enum v4l2_field field;
 714         int maxw, maxh;
 715
 716         if (dev->ovbuf.base == NULL)
 717                 return -EINVAL;
 718         if (dev->ovfmt == NULL)
 719                 return -EINVAL;
 720         if (win->w.width < 48 || win->w.height < 32)
 721                 return -EINVAL;
 722
 723         field = win->field;
 724         maxw  = dev->crop_current.width;
 725         maxh  = dev->crop_current.height;
 726
 727         if (field == V4L2_FIELD_ANY) {
 728                 field = (win->w.height > maxh/2)
 729                         ? V4L2_FIELD_INTERLACED
 730                         : V4L2_FIELD_TOP;
 731         }
 732         switch (field) {
 733         case V4L2_FIELD_TOP:
 734         case V4L2_FIELD_BOTTOM:
 735                 maxh = maxh / 2;
 736                 break;
 737         case V4L2_FIELD_INTERLACED:
 738                 break;
 739         default:
 740                 return -EINVAL;
 741         }
 742
 743         win->field = field;
 744         if (win->w.width > maxw)
 745                 win->w.width = maxw;
 746         if (win->w.height > maxh)
 747                 win->w.height = maxh;
 748         return 0;
 749 }
 750
 751 inline void viu_activate_overlay(struct viu_reg *viu_reg)
 752 {
 753         struct viu_reg *vr = viu_reg;
 754
 755         out_be32(&vr->field_base_addr, reg_val.field_base_addr);
 756         out_be32(&vr->dma_inc, reg_val.dma_inc);
 757         out_be32(&vr->picture_count, reg_val.picture_count);
 758 }
 759
 760 static int viu_setup_preview(struct viu_dev *dev, struct viu_fh *fh)
 761 {
 762         int bpp;
 763
 764         dprintk(1, "%s %dx%d %s\n", __func__,
 765                 fh->win.w.width, fh->win.w.height, dev->ovfmt->name);
 766
 767         reg_val.status_cfg = 0;
 768
 769         /* setup window */
 770         reg_val.picture_count = (fh->win.w.height / 2) << 16 |
 771                                 fh->win.w.width;
 772
 773         /* setup color depth and dma increment */
 774         bpp = dev->ovfmt->depth / 8;
 775         switch (bpp) {
 776         case 2:
 777                 reg_val.status_cfg &= ~MODE_32BIT;
 778                 reg_val.dma_inc = fh->win.w.width * 2;
 779                 break;
 780         case 4:
 781                 reg_val.status_cfg |= MODE_32BIT;
 782                 reg_val.dma_inc = fh->win.w.width * 4;
 783                 break;
 784         default:
 785                 dprintk(0, "device doesn't support color depth(%d)\n",
 786                         bpp * 8);
 787                 return -EINVAL;
 788         }
 789
 790         dev->ovfield = fh->win.field;
 791         if (!V4L2_FIELD_HAS_BOTH(dev->ovfield))
 792                 reg_val.dma_inc = 0;
 793
 794         reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
 795
 796         /* setup the base address of the overlay buffer */
 797         reg_val.field_base_addr = (u32)dev->ovbuf.base;
 798
 799         return 0;
 800 }
 801
 802 static int vidioc_s_fmt_overlay(struct file *file, void *priv,
 803                                         struct v4l2_format *f)
 804 {
 805         struct viu_fh  *fh  = priv;
 806         struct viu_dev *dev = (struct viu_dev *)fh->dev;
 807         unsigned long  flags;
 808         int err;
 809
 810         err = verify_preview(dev, &f->fmt.win);
 811         if (err)
 812                 return err;
 813
 814         fh->win = f->fmt.win;
 815
 816         spin_lock_irqsave(&dev->slock, flags);
 817         viu_setup_preview(dev, fh);
 818         spin_unlock_irqrestore(&dev->slock, flags);
 819         return 0;
 820 }
 821
 822 static int vidioc_try_fmt_overlay(struct file *file, void *priv,
 823                                         struct v4l2_format *f)
 824 {
 825         return 0;
 826 }
 827
 828 static int vidioc_overlay(struct file *file, void *priv, unsigned int on)
 829 {
 830         struct viu_fh  *fh  = priv;
 831         struct viu_dev *dev = (struct viu_dev *)fh->dev;
 832         unsigned long  flags;
 833
 834         if (on) {
 835                 spin_lock_irqsave(&dev->slock, flags);
 836                 viu_activate_overlay(dev->vr);
 837                 dev->ovenable = 1;
 838
 839                 /* start dma */
 840                 viu_start_dma(dev);
 841                 spin_unlock_irqrestore(&dev->slock, flags);
 842         } else {
 843                 viu_stop_dma(dev);
 844                 dev->ovenable = 0;
 845         }
 846
 847         return 0;
 848 }
 849
 850 int vidioc_g_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
 851 {
 852         struct viu_fh  *fh = priv;
 853         struct viu_dev *dev = fh->dev;
 854         struct v4l2_framebuffer *fb = arg;
 855
 856         *fb = dev->ovbuf;
 857         fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 858         return 0;
 859 }
 860
 861 int vidioc_s_fbuf(struct file *file, void *priv, const struct v4l2_framebuffer *arg)
 862 {
 863         struct viu_fh  *fh = priv;
 864         struct viu_dev *dev = fh->dev;
 865         const struct v4l2_framebuffer *fb = arg;
 866         struct viu_fmt *fmt;
 867
 868         if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
 869                 return -EPERM;
 870
 871         /* check args */
 872         fmt = format_by_fourcc(fb->fmt.pixelformat);
 873         if (fmt == NULL)
 874                 return -EINVAL;
 875
 876         /* ok, accept it */
 877         dev->ovbuf = *fb;
 878         dev->ovfmt = fmt;
 879         if (dev->ovbuf.fmt.bytesperline == 0) {
 880                 dev->ovbuf.fmt.bytesperline =
 881                         dev->ovbuf.fmt.width * fmt->depth / 8;
 882         }
 883         return 0;
 884 }
 885
 886 static int vidioc_reqbufs(struct file *file, void *priv,
 887                                 struct v4l2_requestbuffers *p)
 888 {
 889         struct viu_fh *fh = priv;
 890
 891         return videobuf_reqbufs(&fh->vb_vidq, p);
 892 }
 893
 894 static int vidioc_querybuf(struct file *file, void *priv,
 895                                         struct v4l2_buffer *p)
 896 {
 897         struct viu_fh *fh = priv;
 898
 899         return videobuf_querybuf(&fh->vb_vidq, p);
 900 }
 901
 902 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 903 {
 904         struct viu_fh *fh = priv;
 905
 906         return videobuf_qbuf(&fh->vb_vidq, p);
 907 }
 908
 909 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 910 {
 911         struct viu_fh *fh = priv;
 912
 913         return videobuf_dqbuf(&fh->vb_vidq, p,
 914                                 file->f_flags & O_NONBLOCK);
 915 }
 916
 917 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 918 {
 919         struct viu_fh *fh = priv;
 920         struct viu_dev *dev = fh->dev;
 921
 922         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 923                 return -EINVAL;
 924         if (fh->type != i)
 925                 return -EINVAL;
 926
 927         if (dev->ovenable)
 928                 dev->ovenable = 0;
 929
 930         viu_start_dma(fh->dev);
 931
 932         return videobuf_streamon(&fh->vb_vidq);
 933 }
 934
 935 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 936 {
 937         struct viu_fh  *fh = priv;
 938
 939         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 940                 return -EINVAL;
 941         if (fh->type != i)
 942                 return -EINVAL;
 943
 944         viu_stop_dma(fh->dev);
 945
 946         return videobuf_streamoff(&fh->vb_vidq);
 947 }
 948
 949 #define decoder_call(viu, o, f, args...) \
 950         v4l2_subdev_call(viu->decoder, o, f, ##args)
 951
 952 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
 953 {
 954         struct viu_fh *fh = priv;
 955
 956         decoder_call(fh->dev, video, querystd, std_id);
 957         return 0;
 958 }
 959
 960 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
 961 {
 962         struct viu_fh *fh = priv;
 963
 964         fh->dev->std = id;
 965         decoder_call(fh->dev, core, s_std, id);
 966         return 0;
 967 }
 968
 969 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
 970 {
 971         struct viu_fh *fh = priv;
 972
 973         *std_id = fh->dev->std;
 974         return 0;
 975 }
 976
 977 /* only one input in this driver */
 978 static int vidioc_enum_input(struct file *file, void *priv,
 979                                         struct v4l2_input *inp)
 980 {
 981         struct viu_fh *fh = priv;
 982
 983         if (inp->index != 0)
 984                 return -EINVAL;
 985
 986         inp->type = V4L2_INPUT_TYPE_CAMERA;
 987         inp->std = fh->dev->vdev->tvnorms;
 988         strcpy(inp->name, "Camera");
 989         return 0;
 990 }
 991
 992 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 993 {
 994         *i = 0;
 995         return 0;
 996 }
 997
 998 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 999 {
1000         struct viu_fh *fh = priv;
1001
1002         if (i > 1)
1003                 return -EINVAL;
1004
1005         decoder_call(fh->dev, video, s_routing, i, 0, 0);
1006         return 0;
1007 }
1008
1009 /* Controls */
1010 static int vidioc_queryctrl(struct file *file, void *priv,
1011                                 struct v4l2_queryctrl *qc)
1012 {
1013         int i;
1014
1015         for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1016                 if (qc->id && qc->id == viu_qctrl[i].id) {
1017                         memcpy(qc, &(viu_qctrl[i]), sizeof(*qc));
1018                         return 0;
1019                 }
1020         }
1021         return -EINVAL;
1022 }
1023
1024 static int vidioc_g_ctrl(struct file *file, void *priv,
1025                                 struct v4l2_control *ctrl)
1026 {
1027         int i;
1028
1029         for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1030                 if (ctrl->id == viu_qctrl[i].id) {
1031                         ctrl->value = qctl_regs[i];
1032                         return 0;
1033                 }
1034         }
1035         return -EINVAL;
1036 }
1037 static int vidioc_s_ctrl(struct file *file, void *priv,
1038                                 struct v4l2_control *ctrl)
1039 {
1040         int i;
1041
1042         for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1043                 if (ctrl->id == viu_qctrl[i].id) {
1044                         if (ctrl->value < viu_qctrl[i].minimum
1045                                 || ctrl->value > viu_qctrl[i].maximum)
1046                                         return -ERANGE;
1047                         qctl_regs[i] = ctrl->value;
1048                         return 0;
1049                 }
1050         }
1051         return -EINVAL;
1052 }
1053
1054 inline void viu_activate_next_buf(struct viu_dev *dev,
1055                                 struct viu_dmaqueue *viuq)
1056 {
1057         struct viu_dmaqueue *vidq = viuq;
1058         struct viu_buf *buf;
1059
1060         /* launch another DMA operation for an active/queued buffer */
1061         if (!list_empty(&vidq->active)) {
1062                 buf = list_entry(vidq->active.next, struct viu_buf,
1063                                         vb.queue);
1064                 dprintk(1, "start another queued buffer: 0x%p\n", buf);
1065                 buffer_activate(dev, buf);
1066         } else if (!list_empty(&vidq->queued)) {
1067                 buf = list_entry(vidq->queued.next, struct viu_buf,
1068                                         vb.queue);
1069                 list_del(&buf->vb.queue);
1070
1071                 dprintk(1, "start another queued buffer: 0x%p\n", buf);
1072                 list_add_tail(&buf->vb.queue, &vidq->active);
1073                 buf->vb.state = VIDEOBUF_ACTIVE;
1074                 buffer_activate(dev, buf);
1075         }
1076 }
1077
1078 inline void viu_default_settings(struct viu_reg *viu_reg)
1079 {
1080         struct viu_reg *vr = viu_reg;
1081
1082         out_be32(&vr->luminance, 0x9512A254);
1083         out_be32(&vr->chroma_r, 0x03310000);
1084         out_be32(&vr->chroma_g, 0x06600F38);
1085         out_be32(&vr->chroma_b, 0x00000409);
1086         out_be32(&vr->alpha, 0x000000ff);
1087         out_be32(&vr->req_alarm, 0x00000090);
1088         dprintk(1, "status reg: 0x%08x, field base: 0x%08x\n",
1089                 in_be32(&vr->status_cfg), in_be32(&vr->field_base_addr));
1090 }
1091
1092 static void viu_overlay_intr(struct viu_dev *dev, u32 status)
1093 {
1094         struct viu_reg *vr = dev->vr;
1095
1096         if (status & INT_DMA_END_STATUS)
1097                 dev->dma_done = 1;
1098
1099         if (status & INT_FIELD_STATUS) {
1100                 if (dev->dma_done) {
1101                         u32 addr = reg_val.field_base_addr;
1102
1103                         dev->dma_done = 0;
1104                         if (status & FIELD_NO)
1105                                 addr += reg_val.dma_inc;
1106
1107                         out_be32(&vr->field_base_addr, addr);
1108                         out_be32(&vr->dma_inc, reg_val.dma_inc);
1109                         out_be32(&vr->status_cfg,
1110                                  (status & 0xffc0ffff) |
1111                                  (status & INT_ALL_STATUS) |
1112                                  reg_val.status_cfg);
1113                 } else if (status & INT_VSYNC_STATUS) {
1114                         out_be32(&vr->status_cfg,
1115                                  (status & 0xffc0ffff) |
1116                                  (status & INT_ALL_STATUS) |
1117                                  reg_val.status_cfg);
1118                 }
1119         }
1120 }
1121
1122 static void viu_capture_intr(struct viu_dev *dev, u32 status)
1123 {
1124         struct viu_dmaqueue *vidq = &dev->vidq;
1125         struct viu_reg *vr = dev->vr;
1126         struct viu_buf *buf;
1127         int field_num;
1128         int need_two;
1129         int dma_done = 0;
1130
1131         field_num = status & FIELD_NO;
1132         need_two = V4L2_FIELD_HAS_BOTH(dev->capfield);
1133
1134         if (status & INT_DMA_END_STATUS) {
1135                 dma_done = 1;
1136                 if (((field_num == 0) && (dev->field == 0)) ||
1137                     (field_num && (dev->field == 1)))
1138                         dev->field++;
1139         }
1140
1141         if (status & INT_FIELD_STATUS) {
1142                 dprintk(1, "irq: field %d, done %d\n",
1143                         !!field_num, dma_done);
1144                 if (unlikely(dev->first)) {
1145                         if (field_num == 0) {
1146                                 dev->first = 0;
1147                                 dprintk(1, "activate first buf\n");
1148                                 viu_activate_next_buf(dev, vidq);
1149                         } else
1150                                 dprintk(1, "wait field 0\n");
1151                         return;
1152                 }
1153
1154                 /* setup buffer address for next dma operation */
1155                 if (!list_empty(&vidq->active)) {
1156                         u32 addr = reg_val.field_base_addr;
1157
1158                         if (field_num && need_two) {
1159                                 addr += reg_val.dma_inc;
1160                                 dprintk(1, "field 1, 0x%lx, dev field %d\n",
1161                                         (unsigned long)addr, dev->field);
1162                         }
1163                         out_be32(&vr->field_base_addr, addr);
1164                         out_be32(&vr->dma_inc, reg_val.dma_inc);
1165                         out_be32(&vr->status_cfg,
1166                                  (status & 0xffc0ffff) |
1167                                  (status & INT_ALL_STATUS) |
1168                                  reg_val.status_cfg);
1169                         return;
1170                 }
1171         }
1172
1173         if (dma_done && field_num && (dev->field == 2)) {
1174                 dev->field = 0;
1175                 buf = list_entry(vidq->active.next,
1176                                  struct viu_buf, vb.queue);
1177                 dprintk(1, "viu/0: [%p/%d] 0x%lx/0x%lx: dma complete\n",
1178                         buf, buf->vb.i,
1179                         (unsigned long)videobuf_to_dma_contig(&buf->vb),
1180                         (unsigned long)in_be32(&vr->field_base_addr));
1181
1182                 if (waitqueue_active(&buf->vb.done)) {
1183                         list_del(&buf->vb.queue);
1184                         v4l2_get_timestamp(&buf->vb.ts);
1185                         buf->vb.state = VIDEOBUF_DONE;
1186                         buf->vb.field_count++;
1187                         wake_up(&buf->vb.done);
1188                 }
1189                 /* activate next dma buffer */
1190                 viu_activate_next_buf(dev, vidq);
1191         }
1192 }
1193
1194 static irqreturn_t viu_intr(int irq, void *dev_id)
1195 {
1196         struct viu_dev *dev  = (struct viu_dev *)dev_id;
1197         struct viu_reg *vr = dev->vr;
1198         u32 status;
1199         u32 error;
1200
1201         status = in_be32(&vr->status_cfg);
1202
1203         if (status & INT_ERROR_STATUS) {
1204                 dev->irqs.error_irq++;
1205                 error = status & ERR_MASK;
1206                 if (error)
1207                         dprintk(1, "Err: error(%d), times:%d!\n",
1208                                 error >> 4, dev->irqs.error_irq);
1209                 /* Clear interrupt error bit and error flags */
1210                 out_be32(&vr->status_cfg,
1211                          (status & 0xffc0ffff) | INT_ERROR_STATUS);
1212         }
1213
1214         if (status & INT_DMA_END_STATUS) {
1215                 dev->irqs.dma_end_irq++;
1216                 dev->dma_done = 1;
1217                 dprintk(2, "VIU DMA end interrupt times: %d\n",
1218                                         dev->irqs.dma_end_irq);
1219         }
1220
1221         if (status & INT_HSYNC_STATUS)
1222                 dev->irqs.hsync_irq++;
1223
1224         if (status & INT_FIELD_STATUS) {
1225                 dev->irqs.field_irq++;
1226                 dprintk(2, "VIU field interrupt times: %d\n",
1227                                         dev->irqs.field_irq);
1228         }
1229
1230         if (status & INT_VSTART_STATUS)
1231                 dev->irqs.vstart_irq++;
1232
1233         if (status & INT_VSYNC_STATUS) {
1234                 dev->irqs.vsync_irq++;
1235                 dprintk(2, "VIU vsync interrupt times: %d\n",
1236                         dev->irqs.vsync_irq);
1237         }
1238
1239         /* clear all pending irqs */
1240         status = in_be32(&vr->status_cfg);
1241         out_be32(&vr->status_cfg,
1242                  (status & 0xffc0ffff) | (status & INT_ALL_STATUS));
1243
1244         if (dev->ovenable) {
1245                 viu_overlay_intr(dev, status);
1246                 return IRQ_HANDLED;
1247         }
1248
1249         /* Capture mode */
1250         viu_capture_intr(dev, status);
1251         return IRQ_HANDLED;
1252 }
1253
1254 /*
1255  * File operations for the device
1256  */
1257 static int viu_open(struct file *file)
1258 {
1259         struct video_device *vdev = video_devdata(file);
1260         struct viu_dev *dev = video_get_drvdata(vdev);
1261         struct viu_fh *fh;
1262         struct viu_reg *vr;
1263         int minor = vdev->minor;
1264         u32 status_cfg;
1265         int i;
1266
1267         dprintk(1, "viu: open (minor=%d)\n", minor);
1268
1269         dev->users++;
1270         if (dev->users > 1) {
1271                 dev->users--;
1272                 return -EBUSY;
1273         }
1274
1275         vr = dev->vr;
1276
1277         dprintk(1, "open minor=%d type=%s users=%d\n", minor,
1278                 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
1279
1280         if (mutex_lock_interruptible(&dev->lock)) {
1281                 dev->users--;
1282                 return -ERESTARTSYS;
1283         }
1284
1285         /* allocate and initialize per filehandle data */
1286         fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1287         if (!fh) {
1288                 dev->users--;
1289                 mutex_unlock(&dev->lock);
1290                 return -ENOMEM;
1291         }
1292
1293         file->private_data = fh;
1294         fh->dev = dev;
1295
1296         fh->type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1297         fh->fmt      = format_by_fourcc(V4L2_PIX_FMT_RGB32);
1298         fh->width    = norm_maxw();
1299         fh->height   = norm_maxh();
1300         dev->crop_current.width  = fh->width;
1301         dev->crop_current.height = fh->height;
1302
1303         /* Put all controls at a sane state */
1304         for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++)
1305                 qctl_regs[i] = viu_qctrl[i].default_value;
1306
1307         dprintk(1, "Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1308                 (unsigned long)fh, (unsigned long)dev,
1309                 (unsigned long)&dev->vidq);
1310         dprintk(1, "Open: list_empty queued=%d\n",
1311                 list_empty(&dev->vidq.queued));
1312         dprintk(1, "Open: list_empty active=%d\n",
1313                 list_empty(&dev->vidq.active));
1314
1315         viu_default_settings(vr);
1316
1317         status_cfg = in_be32(&vr->status_cfg);
1318         out_be32(&vr->status_cfg,
1319                  status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN |
1320                                 INT_FIELD_EN | INT_VSTART_EN |
1321                                 INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN));
1322
1323         status_cfg = in_be32(&vr->status_cfg);
1324         out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS);
1325
1326         spin_lock_init(&fh->vbq_lock);
1327         videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops,
1328                                        dev->dev, &fh->vbq_lock,
1329                                        fh->type, V4L2_FIELD_INTERLACED,
1330                                        sizeof(struct viu_buf), fh,
1331                                        &fh->dev->lock);
1332         mutex_unlock(&dev->lock);
1333         return 0;
1334 }
1335
1336 static ssize_t viu_read(struct file *file, char __user *data, size_t count,
1337                         loff_t *ppos)
1338 {
1339         struct viu_fh *fh = file->private_data;
1340         struct viu_dev *dev = fh->dev;
1341         int ret = 0;
1342
1343         dprintk(2, "%s\n", __func__);
1344         if (dev->ovenable)
1345                 dev->ovenable = 0;
1346
1347         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1348                 if (mutex_lock_interruptible(&dev->lock))
1349                         return -ERESTARTSYS;
1350                 viu_start_dma(dev);
1351                 ret = videobuf_read_stream(&fh->vb_vidq, data, count,
1352                                 ppos, 0, file->f_flags & O_NONBLOCK);
1353                 mutex_unlock(&dev->lock);
1354                 return ret;
1355         }
1356         return 0;
1357 }
1358
1359 static unsigned int viu_poll(struct file *file, struct poll_table_struct *wait)
1360 {
1361         struct viu_fh *fh = file->private_data;
1362         struct videobuf_queue *q = &fh->vb_vidq;
1363         struct viu_dev *dev = fh->dev;
1364         unsigned int res;
1365
1366         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1367                 return POLLERR;
1368
1369         mutex_lock(&dev->lock);
1370         res = videobuf_poll_stream(file, q, wait);
1371         mutex_unlock(&dev->lock);
1372         return res;
1373 }
1374
1375 static int viu_release(struct file *file)
1376 {
1377         struct viu_fh *fh = file->private_data;
1378         struct viu_dev *dev = fh->dev;
1379         int minor = video_devdata(file)->minor;
1380
1381         mutex_lock(&dev->lock);
1382         viu_stop_dma(dev);
1383         videobuf_stop(&fh->vb_vidq);
1384         videobuf_mmap_free(&fh->vb_vidq);
1385         mutex_unlock(&dev->lock);
1386
1387         kfree(fh);
1388
1389         dev->users--;
1390         dprintk(1, "close (minor=%d, users=%d)\n",
1391                 minor, dev->users);
1392         return 0;
1393 }
1394
1395 void viu_reset(struct viu_reg *reg)
1396 {
1397         out_be32(&reg->status_cfg, 0);
1398         out_be32(&reg->luminance, 0x9512a254);
1399         out_be32(&reg->chroma_r, 0x03310000);
1400         out_be32(&reg->chroma_g, 0x06600f38);
1401         out_be32(&reg->chroma_b, 0x00000409);
1402         out_be32(&reg->field_base_addr, 0);
1403         out_be32(&reg->dma_inc, 0);
1404         out_be32(&reg->picture_count, 0x01e002d0);
1405         out_be32(&reg->req_alarm, 0x00000090);
1406         out_be32(&reg->alpha, 0x000000ff);
1407 }
1408
1409 static int viu_mmap(struct file *file, struct vm_area_struct *vma)
1410 {
1411         struct viu_fh *fh = file->private_data;
1412         struct viu_dev *dev = fh->dev;
1413         int ret;
1414
1415         dprintk(1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1416
1417         if (mutex_lock_interruptible(&dev->lock))
1418                 return -ERESTARTSYS;
1419         ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1420         mutex_unlock(&dev->lock);
1421
1422         dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1423                 (unsigned long)vma->vm_start,
1424                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1425                 ret);
1426
1427         return ret;
1428 }
1429
1430 static struct v4l2_file_operations viu_fops = {
1431         .owner          = THIS_MODULE,
1432         .open           = viu_open,
1433         .release        = viu_release,
1434         .read           = viu_read,
1435         .poll           = viu_poll,
1436         .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
1437         .mmap           = viu_mmap,
1438 };
1439
1440 static const struct v4l2_ioctl_ops viu_ioctl_ops = {
1441         .vidioc_querycap        = vidioc_querycap,
1442         .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt,
1443         .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_cap,
1444         .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_cap,
1445         .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_cap,
1446         .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt,
1447         .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay,
1448         .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay,
1449         .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay,
1450         .vidioc_overlay       = vidioc_overlay,
1451         .vidioc_g_fbuf        = vidioc_g_fbuf,
1452         .vidioc_s_fbuf        = vidioc_s_fbuf,
1453         .vidioc_reqbufs       = vidioc_reqbufs,
1454         .vidioc_querybuf      = vidioc_querybuf,
1455         .vidioc_qbuf          = vidioc_qbuf,
1456         .vidioc_dqbuf         = vidioc_dqbuf,
1457         .vidioc_g_std         = vidioc_g_std,
1458         .vidioc_s_std         = vidioc_s_std,
1459         .vidioc_querystd      = vidioc_querystd,
1460         .vidioc_enum_input    = vidioc_enum_input,
1461         .vidioc_g_input       = vidioc_g_input,
1462         .vidioc_s_input       = vidioc_s_input,
1463         .vidioc_queryctrl     = vidioc_queryctrl,
1464         .vidioc_g_ctrl        = vidioc_g_ctrl,
1465         .vidioc_s_ctrl        = vidioc_s_ctrl,
1466         .vidioc_streamon      = vidioc_streamon,
1467         .vidioc_streamoff     = vidioc_streamoff,
1468 };
1469
1470 static struct video_device viu_template = {
1471         .name           = "FSL viu",
1472         .fops           = &viu_fops,
1473         .minor          = -1,
1474         .ioctl_ops      = &viu_ioctl_ops,
1475         .release        = video_device_release,
1476
1477         .tvnorms        = V4L2_STD_NTSC_M | V4L2_STD_PAL,
1478 };
1479
1480 static int viu_of_probe(struct platform_device *op)
1481 {
1482         struct viu_dev *viu_dev;
1483         struct video_device *vdev;
1484         struct resource r;
1485         struct viu_reg __iomem *viu_regs;
1486         struct i2c_adapter *ad;
1487         int ret, viu_irq;
1488
1489         ret = of_address_to_resource(op->dev.of_node, 0, &r);
1490         if (ret) {
1491                 dev_err(&op->dev, "Can't parse device node resource\n");
1492                 return -ENODEV;
1493         }
1494
1495         viu_irq = irq_of_parse_and_map(op->dev.of_node, 0);
1496         if (viu_irq == NO_IRQ) {
1497                 dev_err(&op->dev, "Error while mapping the irq\n");
1498                 return -EINVAL;
1499         }
1500
1501         /* request mem region */
1502         if (!devm_request_mem_region(&op->dev, r.start,
1503                                      sizeof(struct viu_reg), DRV_NAME)) {
1504                 dev_err(&op->dev, "Error while requesting mem region\n");
1505                 ret = -EBUSY;
1506                 goto err;
1507         }
1508
1509         /* remap registers */
1510         viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg));
1511         if (!viu_regs) {
1512                 dev_err(&op->dev, "Can't map register set\n");
1513                 ret = -ENOMEM;
1514                 goto err;
1515         }
1516
1517         /* Prepare our private structure */
1518         viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC);
1519         if (!viu_dev) {
1520                 dev_err(&op->dev, "Can't allocate private structure\n");
1521                 ret = -ENOMEM;
1522                 goto err;
1523         }
1524
1525         viu_dev->vr = viu_regs;
1526         viu_dev->irq = viu_irq;
1527         viu_dev->dev = &op->dev;
1528
1529         /* init video dma queues */
1530         INIT_LIST_HEAD(&viu_dev->vidq.active);
1531         INIT_LIST_HEAD(&viu_dev->vidq.queued);
1532
1533         snprintf(viu_dev->v4l2_dev.name,
1534                  sizeof(viu_dev->v4l2_dev.name), "%s", "VIU");
1535         ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev);
1536         if (ret < 0) {
1537                 dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret);
1538                 goto err;
1539         }
1540
1541         ad = i2c_get_adapter(0);
1542         viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad,
1543                         "saa7113", VIU_VIDEO_DECODER_ADDR, NULL);
1544
1545         viu_dev->vidq.timeout.function = viu_vid_timeout;
1546         viu_dev->vidq.timeout.data     = (unsigned long)viu_dev;
1547         init_timer(&viu_dev->vidq.timeout);
1548         viu_dev->std = V4L2_STD_NTSC_M;
1549         viu_dev->first = 1;
1550
1551         /* Allocate memory for video device */
1552         vdev = video_device_alloc();
1553         if (vdev == NULL) {
1554                 ret = -ENOMEM;
1555                 goto err_vdev;
1556         }
1557
1558         memcpy(vdev, &viu_template, sizeof(viu_template));
1559
1560         vdev->v4l2_dev = &viu_dev->v4l2_dev;
1561
1562         viu_dev->vdev = vdev;
1563
1564         /* initialize locks */
1565         mutex_init(&viu_dev->lock);
1566         viu_dev->vdev->lock = &viu_dev->lock;
1567         spin_lock_init(&viu_dev->slock);
1568
1569         video_set_drvdata(viu_dev->vdev, viu_dev);
1570
1571         mutex_lock(&viu_dev->lock);
1572
1573         ret = video_register_device(viu_dev->vdev, VFL_TYPE_GRABBER, -1);
1574         if (ret < 0) {
1575                 video_device_release(viu_dev->vdev);
1576                 goto err_vdev;
1577         }
1578
1579         /* enable VIU clock */
1580         viu_dev->clk = clk_get(&op->dev, "viu_clk");
1581         if (IS_ERR(viu_dev->clk)) {
1582                 dev_err(&op->dev, "failed to find the clock module!\n");
1583                 ret = -ENODEV;
1584                 goto err_clk;
1585         } else {
1586                 clk_enable(viu_dev->clk);
1587         }
1588
1589         /* reset VIU module */
1590         viu_reset(viu_dev->vr);
1591
1592         /* install interrupt handler */
1593         if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) {
1594                 dev_err(&op->dev, "Request VIU IRQ failed.\n");
1595                 ret = -ENODEV;
1596                 goto err_irq;
1597         }
1598
1599         mutex_unlock(&viu_dev->lock);
1600
1601         dev_info(&op->dev, "Freescale VIU Video Capture Board\n");
1602         return ret;
1603
1604 err_irq:
1605         clk_disable(viu_dev->clk);
1606         clk_put(viu_dev->clk);
1607 err_clk:
1608         video_unregister_device(viu_dev->vdev);
1609 err_vdev:
1610         mutex_unlock(&viu_dev->lock);
1611         i2c_put_adapter(ad);
1612         v4l2_device_unregister(&viu_dev->v4l2_dev);
1613 err:
1614         irq_dispose_mapping(viu_irq);
1615         return ret;
1616 }
1617
1618 static int viu_of_remove(struct platform_device *op)
1619 {
1620         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1621         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1622         struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next,
1623                                               struct v4l2_subdev, list);
1624         struct i2c_client *client = v4l2_get_subdevdata(sdev);
1625
1626         free_irq(dev->irq, (void *)dev);
1627         irq_dispose_mapping(dev->irq);
1628
1629         clk_disable(dev->clk);
1630         clk_put(dev->clk);
1631
1632         video_unregister_device(dev->vdev);
1633         i2c_put_adapter(client->adapter);
1634         v4l2_device_unregister(&dev->v4l2_dev);
1635         return 0;
1636 }
1637
1638 #ifdef CONFIG_PM
1639 static int viu_suspend(struct platform_device *op, pm_message_t state)
1640 {
1641         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1642         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1643
1644         clk_disable(dev->clk);
1645         return 0;
1646 }
1647
1648 static int viu_resume(struct platform_device *op)
1649 {
1650         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1651         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1652
1653         clk_enable(dev->clk);
1654         return 0;
1655 }
1656 #endif
1657
1658 /*
1659  * Initialization and module stuff
1660  */
1661 static struct of_device_id mpc512x_viu_of_match[] = {
1662         {
1663                 .compatible = "fsl,mpc5121-viu",
1664         },
1665         {},
1666 };
1667 MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match);
1668
1669 static struct platform_driver viu_of_platform_driver = {
1670         .probe = viu_of_probe,
1671         .remove = viu_of_remove,
1672 #ifdef CONFIG_PM
1673         .suspend = viu_suspend,
1674         .resume = viu_resume,
1675 #endif
1676         .driver = {
1677                 .name = DRV_NAME,
1678                 .owner = THIS_MODULE,
1679                 .of_match_table = mpc512x_viu_of_match,
1680         },
1681 };
1682
1683 module_platform_driver(viu_of_platform_driver);
1684
1685 MODULE_DESCRIPTION("Freescale Video-In(VIU)");
1686 MODULE_AUTHOR("Hongjun Chen");
1687 MODULE_LICENSE("GPL");
1688 MODULE_VERSION(VIU_VERSION);