kernel/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 <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_address.h>
  25 #include <linux/of_irq.h>
  26 #include <linux/of_platform.h>
  27 #include <linux/slab.h>
  28 #include <media/v4l2-common.h>
  29 #include <media/v4l2-device.h>
  30 #include <media/v4l2-ioctl.h>
  31 #include <media/videobuf-dma-contig.h>
  32
  33 #define DRV_NAME                "fsl_viu"
  34 #define VIU_VERSION             "0.5.1"
  35
  36 #define BUFFER_TIMEOUT          msecs_to_jiffies(500)  /* 0.5 seconds */
  37
  38 #define VIU_VID_MEM_LIMIT       4       /* Video memory limit, in Mb */
  39
  40 /* I2C address of video decoder chip is 0x4A */
  41 #define VIU_VIDEO_DECODER_ADDR  0x25
  42
  43 /* supported controls */
  44 static struct v4l2_queryctrl viu_qctrl[] = {
  45         {
  46                 .id            = V4L2_CID_BRIGHTNESS,
  47                 .type          = V4L2_CTRL_TYPE_INTEGER,
  48                 .name          = "Brightness",
  49                 .minimum       = 0,
  50                 .maximum       = 255,
  51                 .step          = 1,
  52                 .default_value = 127,
  53                 .flags         = 0,
  54         }, {
  55                 .id            = V4L2_CID_CONTRAST,
  56                 .type          = V4L2_CTRL_TYPE_INTEGER,
  57                 .name          = "Contrast",
  58                 .minimum       = 0,
  59                 .maximum       = 255,
  60                 .step          = 0x1,
  61                 .default_value = 0x10,
  62                 .flags         = 0,
  63         }, {
  64                 .id            = V4L2_CID_SATURATION,
  65                 .type          = V4L2_CTRL_TYPE_INTEGER,
  66                 .name          = "Saturation",
  67                 .minimum       = 0,
  68                 .maximum       = 255,
  69                 .step          = 0x1,
  70                 .default_value = 127,
  71                 .flags         = 0,
  72         }, {
  73                 .id            = V4L2_CID_HUE,
  74                 .type          = V4L2_CTRL_TYPE_INTEGER,
  75                 .name          = "Hue",
  76                 .minimum       = -128,
  77                 .maximum       = 127,
  78                 .step          = 0x1,
  79                 .default_value = 0,
  80                 .flags         = 0,
  81         }
  82 };
  83
  84 static int qctl_regs[ARRAY_SIZE(viu_qctrl)];
  85
  86 static int info_level;
  87
  88 #define dprintk(level, fmt, arg...)                                     \
  89         do {                                                            \
  90                 if (level <= info_level)                                \
  91                         printk(KERN_DEBUG "viu: " fmt , ## arg);        \
  92         } while (0)
  93
  94 /*
  95  * Basic structures
  96  */
  97 struct viu_fmt {
  98         char  name[32];
  99         u32   fourcc;           /* v4l2 format id */
 100         u32   pixelformat;
 101         int   depth;
 102 };
 103
 104 static struct viu_fmt formats[] = {
 105         {
 106                 .name           = "RGB-16 (5/B-6/G-5/R)",
 107                 .fourcc         = V4L2_PIX_FMT_RGB565,
 108                 .pixelformat    = V4L2_PIX_FMT_RGB565,
 109                 .depth          = 16,
 110         }, {
 111                 .name           = "RGB-32 (A-R-G-B)",
 112                 .fourcc         = V4L2_PIX_FMT_RGB32,
 113                 .pixelformat    = V4L2_PIX_FMT_RGB32,
 114                 .depth          = 32,
 115         }
 116 };
 117
 118 struct viu_dev;
 119 struct viu_buf;
 120
 121 /* buffer for one video frame */
 122 struct viu_buf {
 123         /* common v4l buffer stuff -- must be first */
 124         struct videobuf_buffer vb;
 125         struct viu_fmt *fmt;
 126 };
 127
 128 struct viu_dmaqueue {
 129         struct viu_dev          *dev;
 130         struct list_head        active;
 131         struct list_head        queued;
 132         struct timer_list       timeout;
 133 };
 134
 135 struct viu_status {
 136         u32 field_irq;
 137         u32 vsync_irq;
 138         u32 hsync_irq;
 139         u32 vstart_irq;
 140         u32 dma_end_irq;
 141         u32 error_irq;
 142 };
 143
 144 struct viu_reg {
 145         u32 status_cfg;
 146         u32 luminance;
 147         u32 chroma_r;
 148         u32 chroma_g;
 149         u32 chroma_b;
 150         u32 field_base_addr;
 151         u32 dma_inc;
 152         u32 picture_count;
 153         u32 req_alarm;
 154         u32 alpha;
 155 } __attribute__ ((packed));
 156
 157 struct viu_dev {
 158         struct v4l2_device      v4l2_dev;
 159         struct mutex            lock;
 160         spinlock_t              slock;
 161         int                     users;
 162
 163         struct device           *dev;
 164         /* various device info */
 165         struct video_device     *vdev;
 166         struct viu_dmaqueue     vidq;
 167         enum v4l2_field         capfield;
 168         int                     field;
 169         int                     first;
 170         int                     dma_done;
 171
 172         /* Hardware register area */
 173         struct viu_reg          *vr;
 174
 175         /* Interrupt vector */
 176         int                     irq;
 177         struct viu_status       irqs;
 178
 179         /* video overlay */
 180         struct v4l2_framebuffer ovbuf;
 181         struct viu_fmt          *ovfmt;
 182         unsigned int            ovenable;
 183         enum v4l2_field         ovfield;
 184
 185         /* crop */
 186         struct v4l2_rect        crop_current;
 187
 188         /* clock pointer */
 189         struct clk              *clk;
 190
 191         /* decoder */
 192         struct v4l2_subdev      *decoder;
 193
 194         v4l2_std_id             std;
 195 };
 196
 197 struct viu_fh {
 198         struct viu_dev          *dev;
 199
 200         /* video capture */
 201         struct videobuf_queue   vb_vidq;
 202         spinlock_t              vbq_lock; /* spinlock for the videobuf queue */
 203
 204         /* video overlay */
 205         struct v4l2_window      win;
 206         struct v4l2_clip        clips[1];
 207
 208         /* video capture */
 209         struct viu_fmt          *fmt;
 210         int                     width, height, sizeimage;
 211         enum v4l2_buf_type      type;
 212 };
 213
 214 static struct viu_reg reg_val;
 215
 216 /*
 217  * Macro definitions of VIU registers
 218  */
 219
 220 /* STATUS_CONFIG register */
 221 enum status_config {
 222         SOFT_RST                = 1 << 0,
 223
 224         ERR_MASK                = 0x0f << 4,    /* Error code mask */
 225         ERR_NO                  = 0x00,         /* No error */
 226         ERR_DMA_V               = 0x01 << 4,    /* DMA in vertical active */
 227         ERR_DMA_VB              = 0x02 << 4,    /* DMA in vertical blanking */
 228         ERR_LINE_TOO_LONG       = 0x04 << 4,    /* Line too long */
 229         ERR_TOO_MANG_LINES      = 0x05 << 4,    /* Too many lines in field */
 230         ERR_LINE_TOO_SHORT      = 0x06 << 4,    /* Line too short */
 231         ERR_NOT_ENOUGH_LINE     = 0x07 << 4,    /* Not enough lines in field */
 232         ERR_FIFO_OVERFLOW       = 0x08 << 4,    /* FIFO overflow */
 233         ERR_FIFO_UNDERFLOW      = 0x09 << 4,    /* FIFO underflow */
 234         ERR_1bit_ECC            = 0x0a << 4,    /* One bit ECC error */
 235         ERR_MORE_ECC            = 0x0b << 4,    /* Two/more bits ECC error */
 236
 237         INT_FIELD_EN            = 0x01 << 8,    /* Enable field interrupt */
 238         INT_VSYNC_EN            = 0x01 << 9,    /* Enable vsync interrupt */
 239         INT_HSYNC_EN            = 0x01 << 10,   /* Enable hsync interrupt */
 240         INT_VSTART_EN           = 0x01 << 11,   /* Enable vstart interrupt */
 241         INT_DMA_END_EN          = 0x01 << 12,   /* Enable DMA end interrupt */
 242         INT_ERROR_EN            = 0x01 << 13,   /* Enable error interrupt */
 243         INT_ECC_EN              = 0x01 << 14,   /* Enable ECC interrupt */
 244
 245         INT_FIELD_STATUS        = 0x01 << 16,   /* field interrupt status */
 246         INT_VSYNC_STATUS        = 0x01 << 17,   /* vsync interrupt status */
 247         INT_HSYNC_STATUS        = 0x01 << 18,   /* hsync interrupt status */
 248         INT_VSTART_STATUS       = 0x01 << 19,   /* vstart interrupt status */
 249         INT_DMA_END_STATUS      = 0x01 << 20,   /* DMA end interrupt status */
 250         INT_ERROR_STATUS        = 0x01 << 21,   /* error interrupt status */
 251
 252         DMA_ACT                 = 0x01 << 27,   /* Enable DMA transfer */
 253         FIELD_NO                = 0x01 << 28,   /* Field number */
 254         DITHER_ON               = 0x01 << 29,   /* Dithering is on */
 255         ROUND_ON                = 0x01 << 30,   /* Round is on */
 256         MODE_32BIT              = 0x01 << 31,   /* Data in RGBa888,
 257                                                  * 0 in RGB565
 258                                                  */
 259 };
 260
 261 #define norm_maxw()     720
 262 #define norm_maxh()     576
 263
 264 #define INT_ALL_STATUS  (INT_FIELD_STATUS | INT_VSYNC_STATUS | \
 265                          INT_HSYNC_STATUS | INT_VSTART_STATUS | \
 266                          INT_DMA_END_STATUS | INT_ERROR_STATUS)
 267
 268 #define NUM_FORMATS     ARRAY_SIZE(formats)
 269
 270 static irqreturn_t viu_intr(int irq, void *dev_id);
 271
 272 struct viu_fmt *format_by_fourcc(int fourcc)
 273 {
 274         int i;
 275
 276         for (i = 0; i < NUM_FORMATS; i++) {
 277                 if (formats[i].pixelformat == fourcc)
 278                         return formats + i;
 279         }
 280
 281         dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
 282         return NULL;
 283 }
 284
 285 void viu_start_dma(struct viu_dev *dev)
 286 {
 287         struct viu_reg *vr = dev->vr;
 288
 289         dev->field = 0;
 290
 291         /* Enable DMA operation */
 292         out_be32(&vr->status_cfg, SOFT_RST);
 293         out_be32(&vr->status_cfg, INT_FIELD_EN);
 294 }
 295
 296 void viu_stop_dma(struct viu_dev *dev)
 297 {
 298         struct viu_reg *vr = dev->vr;
 299         int cnt = 100;
 300         u32 status_cfg;
 301
 302         out_be32(&vr->status_cfg, 0);
 303
 304         /* Clear pending interrupts */
 305         status_cfg = in_be32(&vr->status_cfg);
 306         if (status_cfg & 0x3f0000)
 307                 out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
 308
 309         if (status_cfg & DMA_ACT) {
 310                 do {
 311                         status_cfg = in_be32(&vr->status_cfg);
 312                         if (status_cfg & INT_DMA_END_STATUS)
 313                                 break;
 314                 } while (cnt--);
 315
 316                 if (cnt < 0) {
 317                         /* timed out, issue soft reset */
 318                         out_be32(&vr->status_cfg, SOFT_RST);
 319                         out_be32(&vr->status_cfg, 0);
 320                 } else {
 321                         /* clear DMA_END and other pending irqs */
 322                         out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
 323                 }
 324         }
 325
 326         dev->field = 0;
 327 }
 328
 329 static int restart_video_queue(struct viu_dmaqueue *vidq)
 330 {
 331         struct viu_buf *buf, *prev;
 332
 333         dprintk(1, "%s vidq=0x%08lx\n", __func__, (unsigned long)vidq);
 334         if (!list_empty(&vidq->active)) {
 335                 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
 336                 dprintk(2, "restart_queue [%p/%d]: restart dma\n",
 337                         buf, buf->vb.i);
 338
 339                 viu_stop_dma(vidq->dev);
 340
 341                 /* cancel all outstanding capture requests */
 342                 list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) {
 343                         list_del(&buf->vb.queue);
 344                         buf->vb.state = VIDEOBUF_ERROR;
 345                         wake_up(&buf->vb.done);
 346                 }
 347                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 348                 return 0;
 349         }
 350
 351         prev = NULL;
 352         for (;;) {
 353                 if (list_empty(&vidq->queued))
 354                         return 0;
 355                 buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue);
 356                 if (prev == NULL) {
 357                         list_move_tail(&buf->vb.queue, &vidq->active);
 358
 359                         dprintk(1, "Restarting video dma\n");
 360                         viu_stop_dma(vidq->dev);
 361                         viu_start_dma(vidq->dev);
 362
 363                         buf->vb.state = VIDEOBUF_ACTIVE;
 364                         mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 365                         dprintk(2, "[%p/%d] restart_queue - first active\n",
 366                                 buf, buf->vb.i);
 367
 368                 } else if (prev->vb.width  == buf->vb.width  &&
 369                            prev->vb.height == buf->vb.height &&
 370                            prev->fmt       == buf->fmt) {
 371                         list_move_tail(&buf->vb.queue, &vidq->active);
 372                         buf->vb.state = VIDEOBUF_ACTIVE;
 373                         dprintk(2, "[%p/%d] restart_queue - move to active\n",
 374                                 buf, buf->vb.i);
 375                 } else {
 376                         return 0;
 377                 }
 378                 prev = buf;
 379         }
 380 }
 381
 382 static void viu_vid_timeout(unsigned long data)
 383 {
 384         struct viu_dev *dev = (struct viu_dev *)data;
 385         struct viu_buf *buf;
 386         struct viu_dmaqueue *vidq = &dev->vidq;
 387
 388         while (!list_empty(&vidq->active)) {
 389                 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
 390                 list_del(&buf->vb.queue);
 391                 buf->vb.state = VIDEOBUF_ERROR;
 392                 wake_up(&buf->vb.done);
 393                 dprintk(1, "viu/0: [%p/%d] timeout\n", buf, buf->vb.i);
 394         }
 395
 396         restart_video_queue(vidq);
 397 }
 398
 399 /*
 400  * Videobuf operations
 401  */
 402 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
 403                         unsigned int *size)
 404 {
 405         struct viu_fh *fh = vq->priv_data;
 406
 407         *size = fh->width * fh->height * fh->fmt->depth >> 3;
 408         if (*count == 0)
 409                 *count = 32;
 410
 411         while (*size * *count > VIU_VID_MEM_LIMIT * 1024 * 1024)
 412                 (*count)--;
 413
 414         dprintk(1, "%s, count=%d, size=%d\n", __func__, *count, *size);
 415         return 0;
 416 }
 417
 418 static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
 419 {
 420         struct videobuf_buffer *vb = &buf->vb;
 421         void *vaddr = NULL;
 422
 423         BUG_ON(in_interrupt());
 424
 425         videobuf_waiton(vq, &buf->vb, 0, 0);
 426
 427         if (vq->int_ops && vq->int_ops->vaddr)
 428                 vaddr = vq->int_ops->vaddr(vb);
 429
 430         if (vaddr)
 431                 videobuf_dma_contig_free(vq, &buf->vb);
 432
 433         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 434 }
 435
 436 inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf)
 437 {
 438         struct viu_reg *vr = dev->vr;
 439         int bpp;
 440
 441         /* setup the DMA base address */
 442         reg_val.field_base_addr = videobuf_to_dma_contig(&buf->vb);
 443
 444         dprintk(1, "buffer_activate [%p/%d]: dma addr 0x%lx\n",
 445                 buf, buf->vb.i, (unsigned long)reg_val.field_base_addr);
 446
 447         /* interlace is on by default, set horizontal DMA increment */
 448         reg_val.status_cfg = 0;
 449         bpp = buf->fmt->depth >> 3;
 450         switch (bpp) {
 451         case 2:
 452                 reg_val.status_cfg &= ~MODE_32BIT;
 453                 reg_val.dma_inc = buf->vb.width * 2;
 454                 break;
 455         case 4:
 456                 reg_val.status_cfg |= MODE_32BIT;
 457                 reg_val.dma_inc = buf->vb.width * 4;
 458                 break;
 459         default:
 460                 dprintk(0, "doesn't support color depth(%d)\n",
 461                         bpp * 8);
 462                 return -EINVAL;
 463         }
 464
 465         /* setup picture_count register */
 466         reg_val.picture_count = (buf->vb.height / 2) << 16 |
 467                                 buf->vb.width;
 468
 469         reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
 470
 471         buf->vb.state = VIDEOBUF_ACTIVE;
 472         dev->capfield = buf->vb.field;
 473
 474         /* reset dma increment if needed */
 475         if (!V4L2_FIELD_HAS_BOTH(buf->vb.field))
 476                 reg_val.dma_inc = 0;
 477
 478         out_be32(&vr->dma_inc, reg_val.dma_inc);
 479         out_be32(&vr->picture_count, reg_val.picture_count);
 480         out_be32(&vr->field_base_addr, reg_val.field_base_addr);
 481         mod_timer(&dev->vidq.timeout, jiffies + BUFFER_TIMEOUT);
 482         return 0;
 483 }
 484
 485 static int buffer_prepare(struct videobuf_queue *vq,
 486                           struct videobuf_buffer *vb,
 487                           enum v4l2_field field)
 488 {
 489         struct viu_fh  *fh  = vq->priv_data;
 490         struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
 491         int rc;
 492
 493         BUG_ON(fh->fmt == NULL);
 494
 495         if (fh->width  < 48 || fh->width  > norm_maxw() ||
 496             fh->height < 32 || fh->height > norm_maxh())
 497                 return -EINVAL;
 498         buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
 499         if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size)
 500                 return -EINVAL;
 501
 502         if (buf->fmt       != fh->fmt    ||
 503             buf->vb.width  != fh->width  ||
 504             buf->vb.height != fh->height ||
 505             buf->vb.field  != field) {
 506                 buf->fmt       = fh->fmt;
 507                 buf->vb.width  = fh->width;
 508                 buf->vb.height = fh->height;
 509                 buf->vb.field  = field;
 510         }
 511
 512         if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
 513                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 514                 if (rc != 0)
 515                         goto fail;
 516
 517                 buf->vb.width  = fh->width;
 518                 buf->vb.height = fh->height;
 519                 buf->vb.field  = field;
 520                 buf->fmt       = fh->fmt;
 521         }
 522
 523         buf->vb.state = VIDEOBUF_PREPARED;
 524         return 0;
 525
 526 fail:
 527         free_buffer(vq, buf);
 528         return rc;
 529 }
 530
 531 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 532 {
 533         struct viu_buf       *buf     = container_of(vb, struct viu_buf, vb);
 534         struct viu_fh        *fh      = vq->priv_data;
 535         struct viu_dev       *dev     = fh->dev;
 536         struct viu_dmaqueue  *vidq    = &dev->vidq;
 537         struct viu_buf       *prev;
 538
 539         if (!list_empty(&vidq->queued)) {
 540                 dprintk(1, "adding vb queue=0x%08lx\n",
 541                                 (unsigned long)&buf->vb.queue);
 542                 dprintk(1, "vidq pointer 0x%p, queued 0x%p\n",
 543                                 vidq, &vidq->queued);
 544                 dprintk(1, "dev %p, queued: self %p, next %p, head %p\n",
 545                         dev, &vidq->queued, vidq->queued.next,
 546                         vidq->queued.prev);
 547                 list_add_tail(&buf->vb.queue, &vidq->queued);
 548                 buf->vb.state = VIDEOBUF_QUEUED;
 549                 dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
 550                         buf, buf->vb.i);
 551         } else if (list_empty(&vidq->active)) {
 552                 dprintk(1, "adding vb active=0x%08lx\n",
 553                                 (unsigned long)&buf->vb.queue);
 554                 list_add_tail(&buf->vb.queue, &vidq->active);
 555                 buf->vb.state = VIDEOBUF_ACTIVE;
 556                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 557                 dprintk(2, "[%p/%d] buffer_queue - first active\n",
 558                         buf, buf->vb.i);
 559
 560                 buffer_activate(dev, buf);
 561         } else {
 562                 dprintk(1, "adding vb queue2=0x%08lx\n",
 563                                 (unsigned long)&buf->vb.queue);
 564                 prev = list_entry(vidq->active.prev, struct viu_buf, vb.queue);
 565                 if (prev->vb.width  == buf->vb.width  &&
 566                     prev->vb.height == buf->vb.height &&
 567                     prev->fmt       == buf->fmt) {
 568                         list_add_tail(&buf->vb.queue, &vidq->active);
 569                         buf->vb.state = VIDEOBUF_ACTIVE;
 570                         dprintk(2, "[%p/%d] buffer_queue - append to active\n",
 571                                 buf, buf->vb.i);
 572                 } else {
 573                         list_add_tail(&buf->vb.queue, &vidq->queued);
 574                         buf->vb.state = VIDEOBUF_QUEUED;
 575                         dprintk(2, "[%p/%d] buffer_queue - first queued\n",
 576                                 buf, buf->vb.i);
 577                 }
 578         }
 579 }
 580
 581 static void buffer_release(struct videobuf_queue *vq,
 582                                 struct videobuf_buffer *vb)
 583 {
 584         struct viu_buf *buf  = container_of(vb, struct viu_buf, vb);
 585         struct viu_fh  *fh   = vq->priv_data;
 586         struct viu_dev *dev  = (struct viu_dev *)fh->dev;
 587
 588         viu_stop_dma(dev);
 589         free_buffer(vq, buf);
 590 }
 591
 592 static struct videobuf_queue_ops viu_video_qops = {
 593         .buf_setup      = buffer_setup,
 594         .buf_prepare    = buffer_prepare,
 595         .buf_queue      = buffer_queue,
 596         .buf_release    = buffer_release,
 597 };
 598
 599 /*
 600  * IOCTL vidioc handling
 601  */
 602 static int vidioc_querycap(struct file *file, void *priv,
 603                            struct v4l2_capability *cap)
 604 {
 605         strcpy(cap->driver, "viu");
 606         strcpy(cap->card, "viu");
 607         cap->device_caps =      V4L2_CAP_VIDEO_CAPTURE |
 608                                 V4L2_CAP_STREAMING     |
 609                                 V4L2_CAP_VIDEO_OVERLAY |
 610                                 V4L2_CAP_READWRITE;
 611         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 612         return 0;
 613 }
 614
 615 static int vidioc_enum_fmt(struct file *file, void  *priv,
 616                                         struct v4l2_fmtdesc *f)
 617 {
 618         int index = f->index;
 619
 620         if (f->index > NUM_FORMATS)
 621                 return -EINVAL;
 622
 623         strlcpy(f->description, formats[index].name, sizeof(f->description));
 624         f->pixelformat = formats[index].fourcc;
 625         return 0;
 626 }
 627
 628 static int vidioc_g_fmt_cap(struct file *file, void *priv,
 629                                         struct v4l2_format *f)
 630 {
 631         struct viu_fh *fh = priv;
 632
 633         f->fmt.pix.width        = fh->width;
 634         f->fmt.pix.height       = fh->height;
 635         f->fmt.pix.field        = fh->vb_vidq.field;
 636         f->fmt.pix.pixelformat  = fh->fmt->pixelformat;
 637         f->fmt.pix.bytesperline =
 638                         (f->fmt.pix.width * fh->fmt->depth) >> 3;
 639         f->fmt.pix.sizeimage    = fh->sizeimage;
 640         return 0;
 641 }
 642
 643 static int vidioc_try_fmt_cap(struct file *file, void *priv,
 644                                         struct v4l2_format *f)
 645 {
 646         struct viu_fmt *fmt;
 647         enum v4l2_field field;
 648         unsigned int maxw, maxh;
 649
 650         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 651         if (!fmt) {
 652                 dprintk(1, "Fourcc format (0x%08x) invalid.",
 653                         f->fmt.pix.pixelformat);
 654                 return -EINVAL;
 655         }
 656
 657         field = f->fmt.pix.field;
 658
 659         if (field == V4L2_FIELD_ANY) {
 660                 field = V4L2_FIELD_INTERLACED;
 661         } else if (field != V4L2_FIELD_INTERLACED) {
 662                 dprintk(1, "Field type invalid.\n");
 663                 return -EINVAL;
 664         }
 665
 666         maxw  = norm_maxw();
 667         maxh  = norm_maxh();
 668
 669         f->fmt.pix.field = field;
 670         if (f->fmt.pix.height < 32)
 671                 f->fmt.pix.height = 32;
 672         if (f->fmt.pix.height > maxh)
 673                 f->fmt.pix.height = maxh;
 674         if (f->fmt.pix.width < 48)
 675                 f->fmt.pix.width = 48;
 676         if (f->fmt.pix.width > maxw)
 677                 f->fmt.pix.width = maxw;
 678         f->fmt.pix.width &= ~0x03;
 679         f->fmt.pix.bytesperline =
 680                 (f->fmt.pix.width * fmt->depth) >> 3;
 681
 682         return 0;
 683 }
 684
 685 static int vidioc_s_fmt_cap(struct file *file, void *priv,
 686                                         struct v4l2_format *f)
 687 {
 688         struct viu_fh *fh = priv;
 689         int ret;
 690
 691         ret = vidioc_try_fmt_cap(file, fh, f);
 692         if (ret < 0)
 693                 return ret;
 694
 695         fh->fmt           = format_by_fourcc(f->fmt.pix.pixelformat);
 696         fh->width         = f->fmt.pix.width;
 697         fh->height        = f->fmt.pix.height;
 698         fh->sizeimage     = f->fmt.pix.sizeimage;
 699         fh->vb_vidq.field = f->fmt.pix.field;
 700         fh->type          = f->type;
 701         dprintk(1, "set to pixelformat '%4.6s'\n", (char *)&fh->fmt->name);
 702         return 0;
 703 }
 704
 705 static int vidioc_g_fmt_overlay(struct file *file, void *priv,
 706                                         struct v4l2_format *f)
 707 {
 708         struct viu_fh *fh = priv;
 709
 710         f->fmt.win = fh->win;
 711         return 0;
 712 }
 713
 714 static int verify_preview(struct viu_dev *dev, struct v4l2_window *win)
 715 {
 716         enum v4l2_field field;
 717         int maxw, maxh;
 718
 719         if (dev->ovbuf.base == NULL)
 720                 return -EINVAL;
 721         if (dev->ovfmt == NULL)
 722                 return -EINVAL;
 723         if (win->w.width < 48 || win->w.height < 32)
 724                 return -EINVAL;
 725
 726         field = win->field;
 727         maxw  = dev->crop_current.width;
 728         maxh  = dev->crop_current.height;
 729
 730         if (field == V4L2_FIELD_ANY) {
 731                 field = (win->w.height > maxh/2)
 732                         ? V4L2_FIELD_INTERLACED
 733                         : V4L2_FIELD_TOP;
 734         }
 735         switch (field) {
 736         case V4L2_FIELD_TOP:
 737         case V4L2_FIELD_BOTTOM:
 738                 maxh = maxh / 2;
 739                 break;
 740         case V4L2_FIELD_INTERLACED:
 741                 break;
 742         default:
 743                 return -EINVAL;
 744         }
 745
 746         win->field = field;
 747         if (win->w.width > maxw)
 748                 win->w.width = maxw;
 749         if (win->w.height > maxh)
 750                 win->w.height = maxh;
 751         return 0;
 752 }
 753
 754 inline void viu_activate_overlay(struct viu_reg *viu_reg)
 755 {
 756         struct viu_reg *vr = viu_reg;
 757
 758         out_be32(&vr->field_base_addr, reg_val.field_base_addr);
 759         out_be32(&vr->dma_inc, reg_val.dma_inc);
 760         out_be32(&vr->picture_count, reg_val.picture_count);
 761 }
 762
 763 static int viu_setup_preview(struct viu_dev *dev, struct viu_fh *fh)
 764 {
 765         int bpp;
 766
 767         dprintk(1, "%s %dx%d %s\n", __func__,
 768                 fh->win.w.width, fh->win.w.height, dev->ovfmt->name);
 769
 770         reg_val.status_cfg = 0;
 771
 772         /* setup window */
 773         reg_val.picture_count = (fh->win.w.height / 2) << 16 |
 774                                 fh->win.w.width;
 775
 776         /* setup color depth and dma increment */
 777         bpp = dev->ovfmt->depth / 8;
 778         switch (bpp) {
 779         case 2:
 780                 reg_val.status_cfg &= ~MODE_32BIT;
 781                 reg_val.dma_inc = fh->win.w.width * 2;
 782                 break;
 783         case 4:
 784                 reg_val.status_cfg |= MODE_32BIT;
 785                 reg_val.dma_inc = fh->win.w.width * 4;
 786                 break;
 787         default:
 788                 dprintk(0, "device doesn't support color depth(%d)\n",
 789                         bpp * 8);
 790                 return -EINVAL;
 791         }
 792
 793         dev->ovfield = fh->win.field;
 794         if (!V4L2_FIELD_HAS_BOTH(dev->ovfield))
 795                 reg_val.dma_inc = 0;
 796
 797         reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
 798
 799         /* setup the base address of the overlay buffer */
 800         reg_val.field_base_addr = (u32)dev->ovbuf.base;
 801
 802         return 0;
 803 }
 804
 805 static int vidioc_s_fmt_overlay(struct file *file, void *priv,
 806                                         struct v4l2_format *f)
 807 {
 808         struct viu_fh  *fh  = priv;
 809         struct viu_dev *dev = (struct viu_dev *)fh->dev;
 810         unsigned long  flags;
 811         int err;
 812
 813         err = verify_preview(dev, &f->fmt.win);
 814         if (err)
 815                 return err;
 816
 817         fh->win = f->fmt.win;
 818
 819         spin_lock_irqsave(&dev->slock, flags);
 820         viu_setup_preview(dev, fh);
 821         spin_unlock_irqrestore(&dev->slock, flags);
 822         return 0;
 823 }
 824
 825 static int vidioc_try_fmt_overlay(struct file *file, void *priv,
 826                                         struct v4l2_format *f)
 827 {
 828         return 0;
 829 }
 830
 831 static int vidioc_overlay(struct file *file, void *priv, unsigned int on)
 832 {
 833         struct viu_fh  *fh  = priv;
 834         struct viu_dev *dev = (struct viu_dev *)fh->dev;
 835         unsigned long  flags;
 836
 837         if (on) {
 838                 spin_lock_irqsave(&dev->slock, flags);
 839                 viu_activate_overlay(dev->vr);
 840                 dev->ovenable = 1;
 841
 842                 /* start dma */
 843                 viu_start_dma(dev);
 844                 spin_unlock_irqrestore(&dev->slock, flags);
 845         } else {
 846                 viu_stop_dma(dev);
 847                 dev->ovenable = 0;
 848         }
 849
 850         return 0;
 851 }
 852
 853 int vidioc_g_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
 854 {
 855         struct viu_fh  *fh = priv;
 856         struct viu_dev *dev = fh->dev;
 857         struct v4l2_framebuffer *fb = arg;
 858
 859         *fb = dev->ovbuf;
 860         fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 861         return 0;
 862 }
 863
 864 int vidioc_s_fbuf(struct file *file, void *priv, const struct v4l2_framebuffer *arg)
 865 {
 866         struct viu_fh  *fh = priv;
 867         struct viu_dev *dev = fh->dev;
 868         const struct v4l2_framebuffer *fb = arg;
 869         struct viu_fmt *fmt;
 870
 871         if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
 872                 return -EPERM;
 873
 874         /* check args */
 875         fmt = format_by_fourcc(fb->fmt.pixelformat);
 876         if (fmt == NULL)
 877                 return -EINVAL;
 878
 879         /* ok, accept it */
 880         dev->ovbuf = *fb;
 881         dev->ovfmt = fmt;
 882         if (dev->ovbuf.fmt.bytesperline == 0) {
 883                 dev->ovbuf.fmt.bytesperline =
 884                         dev->ovbuf.fmt.width * fmt->depth / 8;
 885         }
 886         return 0;
 887 }
 888
 889 static int vidioc_reqbufs(struct file *file, void *priv,
 890                                 struct v4l2_requestbuffers *p)
 891 {
 892         struct viu_fh *fh = priv;
 893
 894         return videobuf_reqbufs(&fh->vb_vidq, p);
 895 }
 896
 897 static int vidioc_querybuf(struct file *file, void *priv,
 898                                         struct v4l2_buffer *p)
 899 {
 900         struct viu_fh *fh = priv;
 901
 902         return videobuf_querybuf(&fh->vb_vidq, p);
 903 }
 904
 905 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 906 {
 907         struct viu_fh *fh = priv;
 908
 909         return videobuf_qbuf(&fh->vb_vidq, p);
 910 }
 911
 912 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 913 {
 914         struct viu_fh *fh = priv;
 915
 916         return videobuf_dqbuf(&fh->vb_vidq, p,
 917                                 file->f_flags & O_NONBLOCK);
 918 }
 919
 920 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 921 {
 922         struct viu_fh *fh = priv;
 923         struct viu_dev *dev = fh->dev;
 924
 925         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 926                 return -EINVAL;
 927         if (fh->type != i)
 928                 return -EINVAL;
 929
 930         if (dev->ovenable)
 931                 dev->ovenable = 0;
 932
 933         viu_start_dma(fh->dev);
 934
 935         return videobuf_streamon(&fh->vb_vidq);
 936 }
 937
 938 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 939 {
 940         struct viu_fh  *fh = priv;
 941
 942         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 943                 return -EINVAL;
 944         if (fh->type != i)
 945                 return -EINVAL;
 946
 947         viu_stop_dma(fh->dev);
 948
 949         return videobuf_streamoff(&fh->vb_vidq);
 950 }
 951
 952 #define decoder_call(viu, o, f, args...) \
 953         v4l2_subdev_call(viu->decoder, o, f, ##args)
 954
 955 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
 956 {
 957         struct viu_fh *fh = priv;
 958
 959         decoder_call(fh->dev, video, querystd, std_id);
 960         return 0;
 961 }
 962
 963 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
 964 {
 965         struct viu_fh *fh = priv;
 966
 967         fh->dev->std = id;
 968         decoder_call(fh->dev, video, s_std, id);
 969         return 0;
 970 }
 971
 972 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
 973 {
 974         struct viu_fh *fh = priv;
 975
 976         *std_id = fh->dev->std;
 977         return 0;
 978 }
 979
 980 /* only one input in this driver */
 981 static int vidioc_enum_input(struct file *file, void *priv,
 982                                         struct v4l2_input *inp)
 983 {
 984         struct viu_fh *fh = priv;
 985
 986         if (inp->index != 0)
 987                 return -EINVAL;
 988
 989         inp->type = V4L2_INPUT_TYPE_CAMERA;
 990         inp->std = fh->dev->vdev->tvnorms;
 991         strcpy(inp->name, "Camera");
 992         return 0;
 993 }
 994
 995 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 996 {
 997         *i = 0;
 998         return 0;
 999 }
1000
1001 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1002 {
1003         struct viu_fh *fh = priv;
1004
1005         if (i > 1)
1006                 return -EINVAL;
1007
1008         decoder_call(fh->dev, video, s_routing, i, 0, 0);
1009         return 0;
1010 }
1011
1012 /* Controls */
1013 static int vidioc_queryctrl(struct file *file, void *priv,
1014                                 struct v4l2_queryctrl *qc)
1015 {
1016         int i;
1017
1018         for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1019                 if (qc->id && qc->id == viu_qctrl[i].id) {
1020                         memcpy(qc, &(viu_qctrl[i]), sizeof(*qc));
1021                         return 0;
1022                 }
1023         }
1024         return -EINVAL;
1025 }
1026
1027 static int vidioc_g_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                         ctrl->value = qctl_regs[i];
1035                         return 0;
1036                 }
1037         }
1038         return -EINVAL;
1039 }
1040 static int vidioc_s_ctrl(struct file *file, void *priv,
1041                                 struct v4l2_control *ctrl)
1042 {
1043         int i;
1044
1045         for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++) {
1046                 if (ctrl->id == viu_qctrl[i].id) {
1047                         if (ctrl->value < viu_qctrl[i].minimum
1048                                 || ctrl->value > viu_qctrl[i].maximum)
1049                                         return -ERANGE;
1050                         qctl_regs[i] = ctrl->value;
1051                         return 0;
1052                 }
1053         }
1054         return -EINVAL;
1055 }
1056
1057 inline void viu_activate_next_buf(struct viu_dev *dev,
1058                                 struct viu_dmaqueue *viuq)
1059 {
1060         struct viu_dmaqueue *vidq = viuq;
1061         struct viu_buf *buf;
1062
1063         /* launch another DMA operation for an active/queued buffer */
1064         if (!list_empty(&vidq->active)) {
1065                 buf = list_entry(vidq->active.next, struct viu_buf,
1066                                         vb.queue);
1067                 dprintk(1, "start another queued buffer: 0x%p\n", buf);
1068                 buffer_activate(dev, buf);
1069         } else if (!list_empty(&vidq->queued)) {
1070                 buf = list_entry(vidq->queued.next, struct viu_buf,
1071                                         vb.queue);
1072                 list_del(&buf->vb.queue);
1073
1074                 dprintk(1, "start another queued buffer: 0x%p\n", buf);
1075                 list_add_tail(&buf->vb.queue, &vidq->active);
1076                 buf->vb.state = VIDEOBUF_ACTIVE;
1077                 buffer_activate(dev, buf);
1078         }
1079 }
1080
1081 inline void viu_default_settings(struct viu_reg *viu_reg)
1082 {
1083         struct viu_reg *vr = viu_reg;
1084
1085         out_be32(&vr->luminance, 0x9512A254);
1086         out_be32(&vr->chroma_r, 0x03310000);
1087         out_be32(&vr->chroma_g, 0x06600F38);
1088         out_be32(&vr->chroma_b, 0x00000409);
1089         out_be32(&vr->alpha, 0x000000ff);
1090         out_be32(&vr->req_alarm, 0x00000090);
1091         dprintk(1, "status reg: 0x%08x, field base: 0x%08x\n",
1092                 in_be32(&vr->status_cfg), in_be32(&vr->field_base_addr));
1093 }
1094
1095 static void viu_overlay_intr(struct viu_dev *dev, u32 status)
1096 {
1097         struct viu_reg *vr = dev->vr;
1098
1099         if (status & INT_DMA_END_STATUS)
1100                 dev->dma_done = 1;
1101
1102         if (status & INT_FIELD_STATUS) {
1103                 if (dev->dma_done) {
1104                         u32 addr = reg_val.field_base_addr;
1105
1106                         dev->dma_done = 0;
1107                         if (status & FIELD_NO)
1108                                 addr += reg_val.dma_inc;
1109
1110                         out_be32(&vr->field_base_addr, addr);
1111                         out_be32(&vr->dma_inc, reg_val.dma_inc);
1112                         out_be32(&vr->status_cfg,
1113                                  (status & 0xffc0ffff) |
1114                                  (status & INT_ALL_STATUS) |
1115                                  reg_val.status_cfg);
1116                 } else if (status & INT_VSYNC_STATUS) {
1117                         out_be32(&vr->status_cfg,
1118                                  (status & 0xffc0ffff) |
1119                                  (status & INT_ALL_STATUS) |
1120                                  reg_val.status_cfg);
1121                 }
1122         }
1123 }
1124
1125 static void viu_capture_intr(struct viu_dev *dev, u32 status)
1126 {
1127         struct viu_dmaqueue *vidq = &dev->vidq;
1128         struct viu_reg *vr = dev->vr;
1129         struct viu_buf *buf;
1130         int field_num;
1131         int need_two;
1132         int dma_done = 0;
1133
1134         field_num = status & FIELD_NO;
1135         need_two = V4L2_FIELD_HAS_BOTH(dev->capfield);
1136
1137         if (status & INT_DMA_END_STATUS) {
1138                 dma_done = 1;
1139                 if (((field_num == 0) && (dev->field == 0)) ||
1140                     (field_num && (dev->field == 1)))
1141                         dev->field++;
1142         }
1143
1144         if (status & INT_FIELD_STATUS) {
1145                 dprintk(1, "irq: field %d, done %d\n",
1146                         !!field_num, dma_done);
1147                 if (unlikely(dev->first)) {
1148                         if (field_num == 0) {
1149                                 dev->first = 0;
1150                                 dprintk(1, "activate first buf\n");
1151                                 viu_activate_next_buf(dev, vidq);
1152                         } else
1153                                 dprintk(1, "wait field 0\n");
1154                         return;
1155                 }
1156
1157                 /* setup buffer address for next dma operation */
1158                 if (!list_empty(&vidq->active)) {
1159                         u32 addr = reg_val.field_base_addr;
1160
1161                         if (field_num && need_two) {
1162                                 addr += reg_val.dma_inc;
1163                                 dprintk(1, "field 1, 0x%lx, dev field %d\n",
1164                                         (unsigned long)addr, dev->field);
1165                         }
1166                         out_be32(&vr->field_base_addr, addr);
1167                         out_be32(&vr->dma_inc, reg_val.dma_inc);
1168                         out_be32(&vr->status_cfg,
1169                                  (status & 0xffc0ffff) |
1170                                  (status & INT_ALL_STATUS) |
1171                                  reg_val.status_cfg);
1172                         return;
1173                 }
1174         }
1175
1176         if (dma_done && field_num && (dev->field == 2)) {
1177                 dev->field = 0;
1178                 buf = list_entry(vidq->active.next,
1179                                  struct viu_buf, vb.queue);
1180                 dprintk(1, "viu/0: [%p/%d] 0x%lx/0x%lx: dma complete\n",
1181                         buf, buf->vb.i,
1182                         (unsigned long)videobuf_to_dma_contig(&buf->vb),
1183                         (unsigned long)in_be32(&vr->field_base_addr));
1184
1185                 if (waitqueue_active(&buf->vb.done)) {
1186                         list_del(&buf->vb.queue);
1187                         v4l2_get_timestamp(&buf->vb.ts);
1188                         buf->vb.state = VIDEOBUF_DONE;
1189                         buf->vb.field_count++;
1190                         wake_up(&buf->vb.done);
1191                 }
1192                 /* activate next dma buffer */
1193                 viu_activate_next_buf(dev, vidq);
1194         }
1195 }
1196
1197 static irqreturn_t viu_intr(int irq, void *dev_id)
1198 {
1199         struct viu_dev *dev  = (struct viu_dev *)dev_id;
1200         struct viu_reg *vr = dev->vr;
1201         u32 status;
1202         u32 error;
1203
1204         status = in_be32(&vr->status_cfg);
1205
1206         if (status & INT_ERROR_STATUS) {
1207                 dev->irqs.error_irq++;
1208                 error = status & ERR_MASK;
1209                 if (error)
1210                         dprintk(1, "Err: error(%d), times:%d!\n",
1211                                 error >> 4, dev->irqs.error_irq);
1212                 /* Clear interrupt error bit and error flags */
1213                 out_be32(&vr->status_cfg,
1214                          (status & 0xffc0ffff) | INT_ERROR_STATUS);
1215         }
1216
1217         if (status & INT_DMA_END_STATUS) {
1218                 dev->irqs.dma_end_irq++;
1219                 dev->dma_done = 1;
1220                 dprintk(2, "VIU DMA end interrupt times: %d\n",
1221                                         dev->irqs.dma_end_irq);
1222         }
1223
1224         if (status & INT_HSYNC_STATUS)
1225                 dev->irqs.hsync_irq++;
1226
1227         if (status & INT_FIELD_STATUS) {
1228                 dev->irqs.field_irq++;
1229                 dprintk(2, "VIU field interrupt times: %d\n",
1230                                         dev->irqs.field_irq);
1231         }
1232
1233         if (status & INT_VSTART_STATUS)
1234                 dev->irqs.vstart_irq++;
1235
1236         if (status & INT_VSYNC_STATUS) {
1237                 dev->irqs.vsync_irq++;
1238                 dprintk(2, "VIU vsync interrupt times: %d\n",
1239                         dev->irqs.vsync_irq);
1240         }
1241
1242         /* clear all pending irqs */
1243         status = in_be32(&vr->status_cfg);
1244         out_be32(&vr->status_cfg,
1245                  (status & 0xffc0ffff) | (status & INT_ALL_STATUS));
1246
1247         if (dev->ovenable) {
1248                 viu_overlay_intr(dev, status);
1249                 return IRQ_HANDLED;
1250         }
1251
1252         /* Capture mode */
1253         viu_capture_intr(dev, status);
1254         return IRQ_HANDLED;
1255 }
1256
1257 /*
1258  * File operations for the device
1259  */
1260 static int viu_open(struct file *file)
1261 {
1262         struct video_device *vdev = video_devdata(file);
1263         struct viu_dev *dev = video_get_drvdata(vdev);
1264         struct viu_fh *fh;
1265         struct viu_reg *vr;
1266         int minor = vdev->minor;
1267         u32 status_cfg;
1268         int i;
1269
1270         dprintk(1, "viu: open (minor=%d)\n", minor);
1271
1272         dev->users++;
1273         if (dev->users > 1) {
1274                 dev->users--;
1275                 return -EBUSY;
1276         }
1277
1278         vr = dev->vr;
1279
1280         dprintk(1, "open minor=%d type=%s users=%d\n", minor,
1281                 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
1282
1283         if (mutex_lock_interruptible(&dev->lock)) {
1284                 dev->users--;
1285                 return -ERESTARTSYS;
1286         }
1287
1288         /* allocate and initialize per filehandle data */
1289         fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1290         if (!fh) {
1291                 dev->users--;
1292                 mutex_unlock(&dev->lock);
1293                 return -ENOMEM;
1294         }
1295
1296         file->private_data = fh;
1297         fh->dev = dev;
1298
1299         fh->type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1300         fh->fmt      = format_by_fourcc(V4L2_PIX_FMT_RGB32);
1301         fh->width    = norm_maxw();
1302         fh->height   = norm_maxh();
1303         dev->crop_current.width  = fh->width;
1304         dev->crop_current.height = fh->height;
1305
1306         /* Put all controls at a sane state */
1307         for (i = 0; i < ARRAY_SIZE(viu_qctrl); i++)
1308                 qctl_regs[i] = viu_qctrl[i].default_value;
1309
1310         dprintk(1, "Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1311                 (unsigned long)fh, (unsigned long)dev,
1312                 (unsigned long)&dev->vidq);
1313         dprintk(1, "Open: list_empty queued=%d\n",
1314                 list_empty(&dev->vidq.queued));
1315         dprintk(1, "Open: list_empty active=%d\n",
1316                 list_empty(&dev->vidq.active));
1317
1318         viu_default_settings(vr);
1319
1320         status_cfg = in_be32(&vr->status_cfg);
1321         out_be32(&vr->status_cfg,
1322                  status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN |
1323                                 INT_FIELD_EN | INT_VSTART_EN |
1324                                 INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN));
1325
1326         status_cfg = in_be32(&vr->status_cfg);
1327         out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS);
1328
1329         spin_lock_init(&fh->vbq_lock);
1330         videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops,
1331                                        dev->dev, &fh->vbq_lock,
1332                                        fh->type, V4L2_FIELD_INTERLACED,
1333                                        sizeof(struct viu_buf), fh,
1334                                        &fh->dev->lock);
1335         mutex_unlock(&dev->lock);
1336         return 0;
1337 }
1338
1339 static ssize_t viu_read(struct file *file, char __user *data, size_t count,
1340                         loff_t *ppos)
1341 {
1342         struct viu_fh *fh = file->private_data;
1343         struct viu_dev *dev = fh->dev;
1344         int ret = 0;
1345
1346         dprintk(2, "%s\n", __func__);
1347         if (dev->ovenable)
1348                 dev->ovenable = 0;
1349
1350         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1351                 if (mutex_lock_interruptible(&dev->lock))
1352                         return -ERESTARTSYS;
1353                 viu_start_dma(dev);
1354                 ret = videobuf_read_stream(&fh->vb_vidq, data, count,
1355                                 ppos, 0, file->f_flags & O_NONBLOCK);
1356                 mutex_unlock(&dev->lock);
1357                 return ret;
1358         }
1359         return 0;
1360 }
1361
1362 static unsigned int viu_poll(struct file *file, struct poll_table_struct *wait)
1363 {
1364         struct viu_fh *fh = file->private_data;
1365         struct videobuf_queue *q = &fh->vb_vidq;
1366         struct viu_dev *dev = fh->dev;
1367         unsigned int res;
1368
1369         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1370                 return POLLERR;
1371
1372         mutex_lock(&dev->lock);
1373         res = videobuf_poll_stream(file, q, wait);
1374         mutex_unlock(&dev->lock);
1375         return res;
1376 }
1377
1378 static int viu_release(struct file *file)
1379 {
1380         struct viu_fh *fh = file->private_data;
1381         struct viu_dev *dev = fh->dev;
1382         int minor = video_devdata(file)->minor;
1383
1384         mutex_lock(&dev->lock);
1385         viu_stop_dma(dev);
1386         videobuf_stop(&fh->vb_vidq);
1387         videobuf_mmap_free(&fh->vb_vidq);
1388         mutex_unlock(&dev->lock);
1389
1390         kfree(fh);
1391
1392         dev->users--;
1393         dprintk(1, "close (minor=%d, users=%d)\n",
1394                 minor, dev->users);
1395         return 0;
1396 }
1397
1398 void viu_reset(struct viu_reg *reg)
1399 {
1400         out_be32(&reg->status_cfg, 0);
1401         out_be32(&reg->luminance, 0x9512a254);
1402         out_be32(&reg->chroma_r, 0x03310000);
1403         out_be32(&reg->chroma_g, 0x06600f38);
1404         out_be32(&reg->chroma_b, 0x00000409);
1405         out_be32(&reg->field_base_addr, 0);
1406         out_be32(&reg->dma_inc, 0);
1407         out_be32(&reg->picture_count, 0x01e002d0);
1408         out_be32(&reg->req_alarm, 0x00000090);
1409         out_be32(&reg->alpha, 0x000000ff);
1410 }
1411
1412 static int viu_mmap(struct file *file, struct vm_area_struct *vma)
1413 {
1414         struct viu_fh *fh = file->private_data;
1415         struct viu_dev *dev = fh->dev;
1416         int ret;
1417
1418         dprintk(1, "mmap called, vma=0x%08lx\n", (unsigned long)vma);
1419
1420         if (mutex_lock_interruptible(&dev->lock))
1421                 return -ERESTARTSYS;
1422         ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1423         mutex_unlock(&dev->lock);
1424
1425         dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1426                 (unsigned long)vma->vm_start,
1427                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1428                 ret);
1429
1430         return ret;
1431 }
1432
1433 static struct v4l2_file_operations viu_fops = {
1434         .owner          = THIS_MODULE,
1435         .open           = viu_open,
1436         .release        = viu_release,
1437         .read           = viu_read,
1438         .poll           = viu_poll,
1439         .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
1440         .mmap           = viu_mmap,
1441 };
1442
1443 static const struct v4l2_ioctl_ops viu_ioctl_ops = {
1444         .vidioc_querycap        = vidioc_querycap,
1445         .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt,
1446         .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_cap,
1447         .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_cap,
1448         .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_cap,
1449         .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt,
1450         .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay,
1451         .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay,
1452         .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay,
1453         .vidioc_overlay       = vidioc_overlay,
1454         .vidioc_g_fbuf        = vidioc_g_fbuf,
1455         .vidioc_s_fbuf        = vidioc_s_fbuf,
1456         .vidioc_reqbufs       = vidioc_reqbufs,
1457         .vidioc_querybuf      = vidioc_querybuf,
1458         .vidioc_qbuf          = vidioc_qbuf,
1459         .vidioc_dqbuf         = vidioc_dqbuf,
1460         .vidioc_g_std         = vidioc_g_std,
1461         .vidioc_s_std         = vidioc_s_std,
1462         .vidioc_querystd      = vidioc_querystd,
1463         .vidioc_enum_input    = vidioc_enum_input,
1464         .vidioc_g_input       = vidioc_g_input,
1465         .vidioc_s_input       = vidioc_s_input,
1466         .vidioc_queryctrl     = vidioc_queryctrl,
1467         .vidioc_g_ctrl        = vidioc_g_ctrl,
1468         .vidioc_s_ctrl        = vidioc_s_ctrl,
1469         .vidioc_streamon      = vidioc_streamon,
1470         .vidioc_streamoff     = vidioc_streamoff,
1471 };
1472
1473 static struct video_device viu_template = {
1474         .name           = "FSL viu",
1475         .fops           = &viu_fops,
1476         .minor          = -1,
1477         .ioctl_ops      = &viu_ioctl_ops,
1478         .release        = video_device_release,
1479
1480         .tvnorms        = V4L2_STD_NTSC_M | V4L2_STD_PAL,
1481 };
1482
1483 static int viu_of_probe(struct platform_device *op)
1484 {
1485         struct viu_dev *viu_dev;
1486         struct video_device *vdev;
1487         struct resource r;
1488         struct viu_reg __iomem *viu_regs;
1489         struct i2c_adapter *ad;
1490         int ret, viu_irq;
1491         struct clk *clk;
1492
1493         ret = of_address_to_resource(op->dev.of_node, 0, &r);
1494         if (ret) {
1495                 dev_err(&op->dev, "Can't parse device node resource\n");
1496                 return -ENODEV;
1497         }
1498
1499         viu_irq = irq_of_parse_and_map(op->dev.of_node, 0);
1500         if (viu_irq == NO_IRQ) {
1501                 dev_err(&op->dev, "Error while mapping the irq\n");
1502                 return -EINVAL;
1503         }
1504
1505         /* request mem region */
1506         if (!devm_request_mem_region(&op->dev, r.start,
1507                                      sizeof(struct viu_reg), DRV_NAME)) {
1508                 dev_err(&op->dev, "Error while requesting mem region\n");
1509                 ret = -EBUSY;
1510                 goto err;
1511         }
1512
1513         /* remap registers */
1514         viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg));
1515         if (!viu_regs) {
1516                 dev_err(&op->dev, "Can't map register set\n");
1517                 ret = -ENOMEM;
1518                 goto err;
1519         }
1520
1521         /* Prepare our private structure */
1522         viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC);
1523         if (!viu_dev) {
1524                 dev_err(&op->dev, "Can't allocate private structure\n");
1525                 ret = -ENOMEM;
1526                 goto err;
1527         }
1528
1529         viu_dev->vr = viu_regs;
1530         viu_dev->irq = viu_irq;
1531         viu_dev->dev = &op->dev;
1532
1533         /* init video dma queues */
1534         INIT_LIST_HEAD(&viu_dev->vidq.active);
1535         INIT_LIST_HEAD(&viu_dev->vidq.queued);
1536
1537         snprintf(viu_dev->v4l2_dev.name,
1538                  sizeof(viu_dev->v4l2_dev.name), "%s", "VIU");
1539         ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev);
1540         if (ret < 0) {
1541                 dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret);
1542                 goto err;
1543         }
1544
1545         ad = i2c_get_adapter(0);
1546         viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad,
1547                         "saa7113", VIU_VIDEO_DECODER_ADDR, NULL);
1548
1549         viu_dev->vidq.timeout.function = viu_vid_timeout;
1550         viu_dev->vidq.timeout.data     = (unsigned long)viu_dev;
1551         init_timer(&viu_dev->vidq.timeout);
1552         viu_dev->std = V4L2_STD_NTSC_M;
1553         viu_dev->first = 1;
1554
1555         /* Allocate memory for video device */
1556         vdev = video_device_alloc();
1557         if (vdev == NULL) {
1558                 ret = -ENOMEM;
1559                 goto err_vdev;
1560         }
1561
1562         memcpy(vdev, &viu_template, sizeof(viu_template));
1563
1564         vdev->v4l2_dev = &viu_dev->v4l2_dev;
1565
1566         viu_dev->vdev = vdev;
1567
1568         /* initialize locks */
1569         mutex_init(&viu_dev->lock);
1570         viu_dev->vdev->lock = &viu_dev->lock;
1571         spin_lock_init(&viu_dev->slock);
1572
1573         video_set_drvdata(viu_dev->vdev, viu_dev);
1574
1575         mutex_lock(&viu_dev->lock);
1576
1577         ret = video_register_device(viu_dev->vdev, VFL_TYPE_GRABBER, -1);
1578         if (ret < 0) {
1579                 video_device_release(viu_dev->vdev);
1580                 goto err_vdev;
1581         }
1582
1583         /* enable VIU clock */
1584         clk = devm_clk_get(&op->dev, "ipg");
1585         if (IS_ERR(clk)) {
1586                 dev_err(&op->dev, "failed to lookup the clock!\n");
1587                 ret = PTR_ERR(clk);
1588                 goto err_clk;
1589         }
1590         ret = clk_prepare_enable(clk);
1591         if (ret) {
1592                 dev_err(&op->dev, "failed to enable the clock!\n");
1593                 goto err_clk;
1594         }
1595         viu_dev->clk = clk;
1596
1597         /* reset VIU module */
1598         viu_reset(viu_dev->vr);
1599
1600         /* install interrupt handler */
1601         if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) {
1602                 dev_err(&op->dev, "Request VIU IRQ failed.\n");
1603                 ret = -ENODEV;
1604                 goto err_irq;
1605         }
1606
1607         mutex_unlock(&viu_dev->lock);
1608
1609         dev_info(&op->dev, "Freescale VIU Video Capture Board\n");
1610         return ret;
1611
1612 err_irq:
1613         clk_disable_unprepare(viu_dev->clk);
1614 err_clk:
1615         video_unregister_device(viu_dev->vdev);
1616 err_vdev:
1617         mutex_unlock(&viu_dev->lock);
1618         i2c_put_adapter(ad);
1619         v4l2_device_unregister(&viu_dev->v4l2_dev);
1620 err:
1621         irq_dispose_mapping(viu_irq);
1622         return ret;
1623 }
1624
1625 static int viu_of_remove(struct platform_device *op)
1626 {
1627         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1628         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1629         struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next,
1630                                               struct v4l2_subdev, list);
1631         struct i2c_client *client = v4l2_get_subdevdata(sdev);
1632
1633         free_irq(dev->irq, (void *)dev);
1634         irq_dispose_mapping(dev->irq);
1635
1636         clk_disable_unprepare(dev->clk);
1637
1638         video_unregister_device(dev->vdev);
1639         i2c_put_adapter(client->adapter);
1640         v4l2_device_unregister(&dev->v4l2_dev);
1641         return 0;
1642 }
1643
1644 #ifdef CONFIG_PM
1645 static int viu_suspend(struct platform_device *op, pm_message_t state)
1646 {
1647         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1648         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1649
1650         clk_disable(dev->clk);
1651         return 0;
1652 }
1653
1654 static int viu_resume(struct platform_device *op)
1655 {
1656         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1657         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1658
1659         clk_enable(dev->clk);
1660         return 0;
1661 }
1662 #endif
1663
1664 /*
1665  * Initialization and module stuff
1666  */
1667 static struct of_device_id mpc512x_viu_of_match[] = {
1668         {
1669                 .compatible = "fsl,mpc5121-viu",
1670         },
1671         {},
1672 };
1673 MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match);
1674
1675 static struct platform_driver viu_of_platform_driver = {
1676         .probe = viu_of_probe,
1677         .remove = viu_of_remove,
1678 #ifdef CONFIG_PM
1679         .suspend = viu_suspend,
1680         .resume = viu_resume,
1681 #endif
1682         .driver = {
1683                 .name = DRV_NAME,
1684                 .of_match_table = mpc512x_viu_of_match,
1685         },
1686 };
1687
1688 module_platform_driver(viu_of_platform_driver);
1689
1690 MODULE_DESCRIPTION("Freescale Video-In(VIU)");
1691 MODULE_AUTHOR("Hongjun Chen");
1692 MODULE_LICENSE("GPL");
1693 MODULE_VERSION(VIU_VERSION);