drivers/media/platform/fsl-viu.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
   4  *
   5  *  Freescale VIU video driver
   6  *
   7  *  Authors: Hongjun Chen <hong-jun.chen@freescale.com>
   8  *           Porting to 2.6.35 by DENX Software Engineering,
   9  *           Anatolij Gustschin <agust@denx.de>
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/clk.h>
  14 #include <linux/kernel.h>
  15 #include <linux/i2c.h>
  16 #include <linux/init.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/io.h>
  19 #include <linux/of_address.h>
  20 #include <linux/of_irq.h>
  21 #include <linux/of_platform.h>
  22 #include <linux/slab.h>
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-device.h>
  25 #include <media/v4l2-ioctl.h>
  26 #include <media/v4l2-ctrls.h>
  27 #include <media/v4l2-fh.h>
  28 #include <media/v4l2-event.h>
  29 #include <media/videobuf-dma-contig.h>
  30
  31 #define DRV_NAME                "fsl_viu"
  32 #define VIU_VERSION             "0.5.1"
  33
  34 /* Allow building this driver with COMPILE_TEST */
  35 #if !defined(CONFIG_PPC) && !defined(CONFIG_MICROBLAZE)
  36 #define out_be32(v, a)  iowrite32be(a, (void __iomem *)v)
  37 #define in_be32(a)      ioread32be((void __iomem *)a)
  38 #endif
  39
  40 #define BUFFER_TIMEOUT          msecs_to_jiffies(500)  /* 0.5 seconds */
  41
  42 #define VIU_VID_MEM_LIMIT       4       /* Video memory limit, in Mb */
  43
  44 /* I2C address of video decoder chip is 0x4A */
  45 #define VIU_VIDEO_DECODER_ADDR  0x25
  46
  47 static int info_level;
  48
  49 #define dprintk(level, fmt, arg...)                                     \
  50         do {                                                            \
  51                 if (level <= info_level)                                \
  52                         printk(KERN_DEBUG "viu: " fmt , ## arg);        \
  53         } while (0)
  54
  55 /*
  56  * Basic structures
  57  */
  58 struct viu_fmt {
  59         u32   fourcc;           /* v4l2 format id */
  60         u32   pixelformat;
  61         int   depth;
  62 };
  63
  64 static struct viu_fmt formats[] = {
  65         {
  66                 .fourcc         = V4L2_PIX_FMT_RGB565,
  67                 .pixelformat    = V4L2_PIX_FMT_RGB565,
  68                 .depth          = 16,
  69         }, {
  70                 .fourcc         = V4L2_PIX_FMT_RGB32,
  71                 .pixelformat    = V4L2_PIX_FMT_RGB32,
  72                 .depth          = 32,
  73         }
  74 };
  75
  76 struct viu_dev;
  77 struct viu_buf;
  78
  79 /* buffer for one video frame */
  80 struct viu_buf {
  81         /* common v4l buffer stuff -- must be first */
  82         struct videobuf_buffer vb;
  83         struct viu_fmt *fmt;
  84 };
  85
  86 struct viu_dmaqueue {
  87         struct viu_dev          *dev;
  88         struct list_head        active;
  89         struct list_head        queued;
  90         struct timer_list       timeout;
  91 };
  92
  93 struct viu_status {
  94         u32 field_irq;
  95         u32 vsync_irq;
  96         u32 hsync_irq;
  97         u32 vstart_irq;
  98         u32 dma_end_irq;
  99         u32 error_irq;
 100 };
 101
 102 struct viu_reg {
 103         u32 status_cfg;
 104         u32 luminance;
 105         u32 chroma_r;
 106         u32 chroma_g;
 107         u32 chroma_b;
 108         u32 field_base_addr;
 109         u32 dma_inc;
 110         u32 picture_count;
 111         u32 req_alarm;
 112         u32 alpha;
 113 } __attribute__ ((packed));
 114
 115 struct viu_dev {
 116         struct v4l2_device      v4l2_dev;
 117         struct v4l2_ctrl_handler hdl;
 118         struct mutex            lock;
 119         spinlock_t              slock;
 120         int                     users;
 121
 122         struct device           *dev;
 123         /* various device info */
 124         struct video_device     *vdev;
 125         struct viu_dmaqueue     vidq;
 126         enum v4l2_field         capfield;
 127         int                     field;
 128         int                     first;
 129         int                     dma_done;
 130
 131         /* Hardware register area */
 132         struct viu_reg __iomem  *vr;
 133
 134         /* Interrupt vector */
 135         int                     irq;
 136         struct viu_status       irqs;
 137
 138         /* video overlay */
 139         struct v4l2_framebuffer ovbuf;
 140         struct viu_fmt          *ovfmt;
 141         unsigned int            ovenable;
 142         enum v4l2_field         ovfield;
 143
 144         /* crop */
 145         struct v4l2_rect        crop_current;
 146
 147         /* clock pointer */
 148         struct clk              *clk;
 149
 150         /* decoder */
 151         struct v4l2_subdev      *decoder;
 152
 153         v4l2_std_id             std;
 154 };
 155
 156 struct viu_fh {
 157         /* must remain the first field of this struct */
 158         struct v4l2_fh          fh;
 159         struct viu_dev          *dev;
 160
 161         /* video capture */
 162         struct videobuf_queue   vb_vidq;
 163         spinlock_t              vbq_lock; /* spinlock for the videobuf queue */
 164
 165         /* video overlay */
 166         struct v4l2_window      win;
 167         struct v4l2_clip        clips[1];
 168
 169         /* video capture */
 170         struct viu_fmt          *fmt;
 171         int                     width, height, sizeimage;
 172         enum v4l2_buf_type      type;
 173 };
 174
 175 static struct viu_reg reg_val;
 176
 177 /*
 178  * Macro definitions of VIU registers
 179  */
 180
 181 /* STATUS_CONFIG register */
 182 enum status_config {
 183         SOFT_RST                = 1 << 0,
 184
 185         ERR_MASK                = 0x0f << 4,    /* Error code mask */
 186         ERR_NO                  = 0x00,         /* No error */
 187         ERR_DMA_V               = 0x01 << 4,    /* DMA in vertical active */
 188         ERR_DMA_VB              = 0x02 << 4,    /* DMA in vertical blanking */
 189         ERR_LINE_TOO_LONG       = 0x04 << 4,    /* Line too long */
 190         ERR_TOO_MANG_LINES      = 0x05 << 4,    /* Too many lines in field */
 191         ERR_LINE_TOO_SHORT      = 0x06 << 4,    /* Line too short */
 192         ERR_NOT_ENOUGH_LINE     = 0x07 << 4,    /* Not enough lines in field */
 193         ERR_FIFO_OVERFLOW       = 0x08 << 4,    /* FIFO overflow */
 194         ERR_FIFO_UNDERFLOW      = 0x09 << 4,    /* FIFO underflow */
 195         ERR_1bit_ECC            = 0x0a << 4,    /* One bit ECC error */
 196         ERR_MORE_ECC            = 0x0b << 4,    /* Two/more bits ECC error */
 197
 198         INT_FIELD_EN            = 0x01 << 8,    /* Enable field interrupt */
 199         INT_VSYNC_EN            = 0x01 << 9,    /* Enable vsync interrupt */
 200         INT_HSYNC_EN            = 0x01 << 10,   /* Enable hsync interrupt */
 201         INT_VSTART_EN           = 0x01 << 11,   /* Enable vstart interrupt */
 202         INT_DMA_END_EN          = 0x01 << 12,   /* Enable DMA end interrupt */
 203         INT_ERROR_EN            = 0x01 << 13,   /* Enable error interrupt */
 204         INT_ECC_EN              = 0x01 << 14,   /* Enable ECC interrupt */
 205
 206         INT_FIELD_STATUS        = 0x01 << 16,   /* field interrupt status */
 207         INT_VSYNC_STATUS        = 0x01 << 17,   /* vsync interrupt status */
 208         INT_HSYNC_STATUS        = 0x01 << 18,   /* hsync interrupt status */
 209         INT_VSTART_STATUS       = 0x01 << 19,   /* vstart interrupt status */
 210         INT_DMA_END_STATUS      = 0x01 << 20,   /* DMA end interrupt status */
 211         INT_ERROR_STATUS        = 0x01 << 21,   /* error interrupt status */
 212
 213         DMA_ACT                 = 0x01 << 27,   /* Enable DMA transfer */
 214         FIELD_NO                = 0x01 << 28,   /* Field number */
 215         DITHER_ON               = 0x01 << 29,   /* Dithering is on */
 216         ROUND_ON                = 0x01 << 30,   /* Round is on */
 217         MODE_32BIT              = 1UL << 31,    /* Data in RGBa888,
 218                                                  * 0 in RGB565
 219                                                  */
 220 };
 221
 222 #define norm_maxw()     720
 223 #define norm_maxh()     576
 224
 225 #define INT_ALL_STATUS  (INT_FIELD_STATUS | INT_VSYNC_STATUS | \
 226                          INT_HSYNC_STATUS | INT_VSTART_STATUS | \
 227                          INT_DMA_END_STATUS | INT_ERROR_STATUS)
 228
 229 #define NUM_FORMATS     ARRAY_SIZE(formats)
 230
 231 static irqreturn_t viu_intr(int irq, void *dev_id);
 232
 233 static struct viu_fmt *format_by_fourcc(int fourcc)
 234 {
 235         int i;
 236
 237         for (i = 0; i < NUM_FORMATS; i++) {
 238                 if (formats[i].pixelformat == fourcc)
 239                         return formats + i;
 240         }
 241
 242         dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc);
 243         return NULL;
 244 }
 245
 246 static void viu_start_dma(struct viu_dev *dev)
 247 {
 248         struct viu_reg __iomem *vr = dev->vr;
 249
 250         dev->field = 0;
 251
 252         /* Enable DMA operation */
 253         out_be32(&vr->status_cfg, SOFT_RST);
 254         out_be32(&vr->status_cfg, INT_FIELD_EN);
 255 }
 256
 257 static void viu_stop_dma(struct viu_dev *dev)
 258 {
 259         struct viu_reg __iomem *vr = dev->vr;
 260         int cnt = 100;
 261         u32 status_cfg;
 262
 263         out_be32(&vr->status_cfg, 0);
 264
 265         /* Clear pending interrupts */
 266         status_cfg = in_be32(&vr->status_cfg);
 267         if (status_cfg & 0x3f0000)
 268                 out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
 269
 270         if (status_cfg & DMA_ACT) {
 271                 do {
 272                         status_cfg = in_be32(&vr->status_cfg);
 273                         if (status_cfg & INT_DMA_END_STATUS)
 274                                 break;
 275                 } while (cnt--);
 276
 277                 if (cnt < 0) {
 278                         /* timed out, issue soft reset */
 279                         out_be32(&vr->status_cfg, SOFT_RST);
 280                         out_be32(&vr->status_cfg, 0);
 281                 } else {
 282                         /* clear DMA_END and other pending irqs */
 283                         out_be32(&vr->status_cfg, status_cfg & 0x3f0000);
 284                 }
 285         }
 286
 287         dev->field = 0;
 288 }
 289
 290 static int restart_video_queue(struct viu_dmaqueue *vidq)
 291 {
 292         struct viu_buf *buf, *prev;
 293
 294         dprintk(1, "%s vidq=%p\n", __func__, vidq);
 295         if (!list_empty(&vidq->active)) {
 296                 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
 297                 dprintk(2, "restart_queue [%p/%d]: restart dma\n",
 298                         buf, buf->vb.i);
 299
 300                 viu_stop_dma(vidq->dev);
 301
 302                 /* cancel all outstanding capture requests */
 303                 list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) {
 304                         list_del(&buf->vb.queue);
 305                         buf->vb.state = VIDEOBUF_ERROR;
 306                         wake_up(&buf->vb.done);
 307                 }
 308                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 309                 return 0;
 310         }
 311
 312         prev = NULL;
 313         for (;;) {
 314                 if (list_empty(&vidq->queued))
 315                         return 0;
 316                 buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue);
 317                 if (prev == NULL) {
 318                         list_move_tail(&buf->vb.queue, &vidq->active);
 319
 320                         dprintk(1, "Restarting video dma\n");
 321                         viu_stop_dma(vidq->dev);
 322                         viu_start_dma(vidq->dev);
 323
 324                         buf->vb.state = VIDEOBUF_ACTIVE;
 325                         mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 326                         dprintk(2, "[%p/%d] restart_queue - first active\n",
 327                                 buf, buf->vb.i);
 328
 329                 } else if (prev->vb.width  == buf->vb.width  &&
 330                            prev->vb.height == buf->vb.height &&
 331                            prev->fmt       == buf->fmt) {
 332                         list_move_tail(&buf->vb.queue, &vidq->active);
 333                         buf->vb.state = VIDEOBUF_ACTIVE;
 334                         dprintk(2, "[%p/%d] restart_queue - move to active\n",
 335                                 buf, buf->vb.i);
 336                 } else {
 337                         return 0;
 338                 }
 339                 prev = buf;
 340         }
 341 }
 342
 343 static void viu_vid_timeout(struct timer_list *t)
 344 {
 345         struct viu_dev *dev = from_timer(dev, t, vidq.timeout);
 346         struct viu_buf *buf;
 347         struct viu_dmaqueue *vidq = &dev->vidq;
 348
 349         while (!list_empty(&vidq->active)) {
 350                 buf = list_entry(vidq->active.next, struct viu_buf, vb.queue);
 351                 list_del(&buf->vb.queue);
 352                 buf->vb.state = VIDEOBUF_ERROR;
 353                 wake_up(&buf->vb.done);
 354                 dprintk(1, "viu/0: [%p/%d] timeout\n", buf, buf->vb.i);
 355         }
 356
 357         restart_video_queue(vidq);
 358 }
 359
 360 /*
 361  * Videobuf operations
 362  */
 363 static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
 364                         unsigned int *size)
 365 {
 366         struct viu_fh *fh = vq->priv_data;
 367
 368         *size = fh->width * fh->height * fh->fmt->depth >> 3;
 369         if (*count == 0)
 370                 *count = 32;
 371
 372         while (*size * *count > VIU_VID_MEM_LIMIT * 1024 * 1024)
 373                 (*count)--;
 374
 375         dprintk(1, "%s, count=%d, size=%d\n", __func__, *count, *size);
 376         return 0;
 377 }
 378
 379 static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
 380 {
 381         struct videobuf_buffer *vb = &buf->vb;
 382         void *vaddr = NULL;
 383
 384         BUG_ON(in_interrupt());
 385
 386         videobuf_waiton(vq, &buf->vb, 0, 0);
 387
 388         if (vq->int_ops && vq->int_ops->vaddr)
 389                 vaddr = vq->int_ops->vaddr(vb);
 390
 391         if (vaddr)
 392                 videobuf_dma_contig_free(vq, &buf->vb);
 393
 394         buf->vb.state = VIDEOBUF_NEEDS_INIT;
 395 }
 396
 397 inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf)
 398 {
 399         struct viu_reg __iomem *vr = dev->vr;
 400         int bpp;
 401
 402         /* setup the DMA base address */
 403         reg_val.field_base_addr = videobuf_to_dma_contig(&buf->vb);
 404
 405         dprintk(1, "buffer_activate [%p/%d]: dma addr 0x%lx\n",
 406                 buf, buf->vb.i, (unsigned long)reg_val.field_base_addr);
 407
 408         /* interlace is on by default, set horizontal DMA increment */
 409         reg_val.status_cfg = 0;
 410         bpp = buf->fmt->depth >> 3;
 411         switch (bpp) {
 412         case 2:
 413                 reg_val.status_cfg &= ~MODE_32BIT;
 414                 reg_val.dma_inc = buf->vb.width * 2;
 415                 break;
 416         case 4:
 417                 reg_val.status_cfg |= MODE_32BIT;
 418                 reg_val.dma_inc = buf->vb.width * 4;
 419                 break;
 420         default:
 421                 dprintk(0, "doesn't support color depth(%d)\n",
 422                         bpp * 8);
 423                 return -EINVAL;
 424         }
 425
 426         /* setup picture_count register */
 427         reg_val.picture_count = (buf->vb.height / 2) << 16 |
 428                                 buf->vb.width;
 429
 430         reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
 431
 432         buf->vb.state = VIDEOBUF_ACTIVE;
 433         dev->capfield = buf->vb.field;
 434
 435         /* reset dma increment if needed */
 436         if (!V4L2_FIELD_HAS_BOTH(buf->vb.field))
 437                 reg_val.dma_inc = 0;
 438
 439         out_be32(&vr->dma_inc, reg_val.dma_inc);
 440         out_be32(&vr->picture_count, reg_val.picture_count);
 441         out_be32(&vr->field_base_addr, reg_val.field_base_addr);
 442         mod_timer(&dev->vidq.timeout, jiffies + BUFFER_TIMEOUT);
 443         return 0;
 444 }
 445
 446 static int buffer_prepare(struct videobuf_queue *vq,
 447                           struct videobuf_buffer *vb,
 448                           enum v4l2_field field)
 449 {
 450         struct viu_fh  *fh  = vq->priv_data;
 451         struct viu_buf *buf = container_of(vb, struct viu_buf, vb);
 452         int rc;
 453
 454         BUG_ON(fh->fmt == NULL);
 455
 456         if (fh->width  < 48 || fh->width  > norm_maxw() ||
 457             fh->height < 32 || fh->height > norm_maxh())
 458                 return -EINVAL;
 459         buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
 460         if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size)
 461                 return -EINVAL;
 462
 463         if (buf->fmt       != fh->fmt    ||
 464             buf->vb.width  != fh->width  ||
 465             buf->vb.height != fh->height ||
 466             buf->vb.field  != field) {
 467                 buf->fmt       = fh->fmt;
 468                 buf->vb.width  = fh->width;
 469                 buf->vb.height = fh->height;
 470                 buf->vb.field  = field;
 471         }
 472
 473         if (buf->vb.state == VIDEOBUF_NEEDS_INIT) {
 474                 rc = videobuf_iolock(vq, &buf->vb, NULL);
 475                 if (rc != 0)
 476                         goto fail;
 477
 478                 buf->vb.width  = fh->width;
 479                 buf->vb.height = fh->height;
 480                 buf->vb.field  = field;
 481                 buf->fmt       = fh->fmt;
 482         }
 483
 484         buf->vb.state = VIDEOBUF_PREPARED;
 485         return 0;
 486
 487 fail:
 488         free_buffer(vq, buf);
 489         return rc;
 490 }
 491
 492 static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
 493 {
 494         struct viu_buf       *buf     = container_of(vb, struct viu_buf, vb);
 495         struct viu_fh        *fh      = vq->priv_data;
 496         struct viu_dev       *dev     = fh->dev;
 497         struct viu_dmaqueue  *vidq    = &dev->vidq;
 498         struct viu_buf       *prev;
 499
 500         if (!list_empty(&vidq->queued)) {
 501                 dprintk(1, "adding vb queue=%p\n", &buf->vb.queue);
 502                 dprintk(1, "vidq pointer 0x%p, queued 0x%p\n",
 503                                 vidq, &vidq->queued);
 504                 dprintk(1, "dev %p, queued: self %p, next %p, head %p\n",
 505                         dev, &vidq->queued, vidq->queued.next,
 506                         vidq->queued.prev);
 507                 list_add_tail(&buf->vb.queue, &vidq->queued);
 508                 buf->vb.state = VIDEOBUF_QUEUED;
 509                 dprintk(2, "[%p/%d] buffer_queue - append to queued\n",
 510                         buf, buf->vb.i);
 511         } else if (list_empty(&vidq->active)) {
 512                 dprintk(1, "adding vb active=%p\n", &buf->vb.queue);
 513                 list_add_tail(&buf->vb.queue, &vidq->active);
 514                 buf->vb.state = VIDEOBUF_ACTIVE;
 515                 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
 516                 dprintk(2, "[%p/%d] buffer_queue - first active\n",
 517                         buf, buf->vb.i);
 518
 519                 buffer_activate(dev, buf);
 520         } else {
 521                 dprintk(1, "adding vb queue2=%p\n", &buf->vb.queue);
 522                 prev = list_entry(vidq->active.prev, struct viu_buf, vb.queue);
 523                 if (prev->vb.width  == buf->vb.width  &&
 524                     prev->vb.height == buf->vb.height &&
 525                     prev->fmt       == buf->fmt) {
 526                         list_add_tail(&buf->vb.queue, &vidq->active);
 527                         buf->vb.state = VIDEOBUF_ACTIVE;
 528                         dprintk(2, "[%p/%d] buffer_queue - append to active\n",
 529                                 buf, buf->vb.i);
 530                 } else {
 531                         list_add_tail(&buf->vb.queue, &vidq->queued);
 532                         buf->vb.state = VIDEOBUF_QUEUED;
 533                         dprintk(2, "[%p/%d] buffer_queue - first queued\n",
 534                                 buf, buf->vb.i);
 535                 }
 536         }
 537 }
 538
 539 static void buffer_release(struct videobuf_queue *vq,
 540                                 struct videobuf_buffer *vb)
 541 {
 542         struct viu_buf *buf  = container_of(vb, struct viu_buf, vb);
 543         struct viu_fh  *fh   = vq->priv_data;
 544         struct viu_dev *dev  = (struct viu_dev *)fh->dev;
 545
 546         viu_stop_dma(dev);
 547         free_buffer(vq, buf);
 548 }
 549
 550 static const struct videobuf_queue_ops viu_video_qops = {
 551         .buf_setup      = buffer_setup,
 552         .buf_prepare    = buffer_prepare,
 553         .buf_queue      = buffer_queue,
 554         .buf_release    = buffer_release,
 555 };
 556
 557 /*
 558  * IOCTL vidioc handling
 559  */
 560 static int vidioc_querycap(struct file *file, void *priv,
 561                            struct v4l2_capability *cap)
 562 {
 563         strscpy(cap->driver, "viu", sizeof(cap->driver));
 564         strscpy(cap->card, "viu", sizeof(cap->card));
 565         strscpy(cap->bus_info, "platform:viu", sizeof(cap->bus_info));
 566         return 0;
 567 }
 568
 569 static int vidioc_enum_fmt(struct file *file, void  *priv,
 570                                         struct v4l2_fmtdesc *f)
 571 {
 572         int index = f->index;
 573
 574         if (f->index >= NUM_FORMATS)
 575                 return -EINVAL;
 576
 577         f->pixelformat = formats[index].fourcc;
 578         return 0;
 579 }
 580
 581 static int vidioc_g_fmt_cap(struct file *file, void *priv,
 582                                         struct v4l2_format *f)
 583 {
 584         struct viu_fh *fh = priv;
 585
 586         f->fmt.pix.width        = fh->width;
 587         f->fmt.pix.height       = fh->height;
 588         f->fmt.pix.field        = fh->vb_vidq.field;
 589         f->fmt.pix.pixelformat  = fh->fmt->pixelformat;
 590         f->fmt.pix.bytesperline =
 591                         (f->fmt.pix.width * fh->fmt->depth) >> 3;
 592         f->fmt.pix.sizeimage    = fh->sizeimage;
 593         f->fmt.pix.colorspace   = V4L2_COLORSPACE_SMPTE170M;
 594         return 0;
 595 }
 596
 597 static int vidioc_try_fmt_cap(struct file *file, void *priv,
 598                                         struct v4l2_format *f)
 599 {
 600         struct viu_fmt *fmt;
 601         unsigned int maxw, maxh;
 602
 603         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 604         if (!fmt) {
 605                 dprintk(1, "Fourcc format (0x%08x) invalid.",
 606                         f->fmt.pix.pixelformat);
 607                 return -EINVAL;
 608         }
 609
 610         maxw  = norm_maxw();
 611         maxh  = norm_maxh();
 612
 613         f->fmt.pix.field = V4L2_FIELD_INTERLACED;
 614         if (f->fmt.pix.height < 32)
 615                 f->fmt.pix.height = 32;
 616         if (f->fmt.pix.height > maxh)
 617                 f->fmt.pix.height = maxh;
 618         if (f->fmt.pix.width < 48)
 619                 f->fmt.pix.width = 48;
 620         if (f->fmt.pix.width > maxw)
 621                 f->fmt.pix.width = maxw;
 622         f->fmt.pix.width &= ~0x03;
 623         f->fmt.pix.bytesperline =
 624                 (f->fmt.pix.width * fmt->depth) >> 3;
 625         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
 626         f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
 627
 628         return 0;
 629 }
 630
 631 static int vidioc_s_fmt_cap(struct file *file, void *priv,
 632                                         struct v4l2_format *f)
 633 {
 634         struct viu_fh *fh = priv;
 635         int ret;
 636
 637         ret = vidioc_try_fmt_cap(file, fh, f);
 638         if (ret < 0)
 639                 return ret;
 640
 641         fh->fmt           = format_by_fourcc(f->fmt.pix.pixelformat);
 642         fh->width         = f->fmt.pix.width;
 643         fh->height        = f->fmt.pix.height;
 644         fh->sizeimage     = f->fmt.pix.sizeimage;
 645         fh->vb_vidq.field = f->fmt.pix.field;
 646         fh->type          = f->type;
 647         return 0;
 648 }
 649
 650 static int vidioc_g_fmt_overlay(struct file *file, void *priv,
 651                                         struct v4l2_format *f)
 652 {
 653         struct viu_fh *fh = priv;
 654
 655         f->fmt.win = fh->win;
 656         return 0;
 657 }
 658
 659 static int verify_preview(struct viu_dev *dev, struct v4l2_window *win)
 660 {
 661         enum v4l2_field field;
 662         int maxw, maxh;
 663
 664         if (dev->ovbuf.base == NULL)
 665                 return -EINVAL;
 666         if (dev->ovfmt == NULL)
 667                 return -EINVAL;
 668         if (win->w.width < 48 || win->w.height < 32)
 669                 return -EINVAL;
 670
 671         field = win->field;
 672         maxw  = dev->crop_current.width;
 673         maxh  = dev->crop_current.height;
 674
 675         if (field == V4L2_FIELD_ANY) {
 676                 field = (win->w.height > maxh/2)
 677                         ? V4L2_FIELD_INTERLACED
 678                         : V4L2_FIELD_TOP;
 679         }
 680         switch (field) {
 681         case V4L2_FIELD_TOP:
 682         case V4L2_FIELD_BOTTOM:
 683                 maxh = maxh / 2;
 684                 break;
 685         case V4L2_FIELD_INTERLACED:
 686                 break;
 687         default:
 688                 return -EINVAL;
 689         }
 690
 691         win->field = field;
 692         if (win->w.width > maxw)
 693                 win->w.width = maxw;
 694         if (win->w.height > maxh)
 695                 win->w.height = maxh;
 696         return 0;
 697 }
 698
 699 inline void viu_activate_overlay(struct viu_reg __iomem *vr)
 700 {
 701         out_be32(&vr->field_base_addr, reg_val.field_base_addr);
 702         out_be32(&vr->dma_inc, reg_val.dma_inc);
 703         out_be32(&vr->picture_count, reg_val.picture_count);
 704 }
 705
 706 static int viu_setup_preview(struct viu_dev *dev, struct viu_fh *fh)
 707 {
 708         int bpp;
 709
 710         dprintk(1, "%s %dx%d\n", __func__,
 711                 fh->win.w.width, fh->win.w.height);
 712
 713         reg_val.status_cfg = 0;
 714
 715         /* setup window */
 716         reg_val.picture_count = (fh->win.w.height / 2) << 16 |
 717                                 fh->win.w.width;
 718
 719         /* setup color depth and dma increment */
 720         bpp = dev->ovfmt->depth / 8;
 721         switch (bpp) {
 722         case 2:
 723                 reg_val.status_cfg &= ~MODE_32BIT;
 724                 reg_val.dma_inc = fh->win.w.width * 2;
 725                 break;
 726         case 4:
 727                 reg_val.status_cfg |= MODE_32BIT;
 728                 reg_val.dma_inc = fh->win.w.width * 4;
 729                 break;
 730         default:
 731                 dprintk(0, "device doesn't support color depth(%d)\n",
 732                         bpp * 8);
 733                 return -EINVAL;
 734         }
 735
 736         dev->ovfield = fh->win.field;
 737         if (!V4L2_FIELD_HAS_BOTH(dev->ovfield))
 738                 reg_val.dma_inc = 0;
 739
 740         reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN;
 741
 742         /* setup the base address of the overlay buffer */
 743         reg_val.field_base_addr = (u32)(long)dev->ovbuf.base;
 744
 745         return 0;
 746 }
 747
 748 static int vidioc_s_fmt_overlay(struct file *file, void *priv,
 749                                         struct v4l2_format *f)
 750 {
 751         struct viu_fh  *fh  = priv;
 752         struct viu_dev *dev = (struct viu_dev *)fh->dev;
 753         unsigned long  flags;
 754         int err;
 755
 756         err = verify_preview(dev, &f->fmt.win);
 757         if (err)
 758                 return err;
 759
 760         fh->win = f->fmt.win;
 761
 762         spin_lock_irqsave(&dev->slock, flags);
 763         viu_setup_preview(dev, fh);
 764         spin_unlock_irqrestore(&dev->slock, flags);
 765         return 0;
 766 }
 767
 768 static int vidioc_try_fmt_overlay(struct file *file, void *priv,
 769                                         struct v4l2_format *f)
 770 {
 771         return 0;
 772 }
 773
 774 static int vidioc_overlay(struct file *file, void *priv, unsigned int on)
 775 {
 776         struct viu_fh  *fh  = priv;
 777         struct viu_dev *dev = (struct viu_dev *)fh->dev;
 778         unsigned long  flags;
 779
 780         if (on) {
 781                 spin_lock_irqsave(&dev->slock, flags);
 782                 viu_activate_overlay(dev->vr);
 783                 dev->ovenable = 1;
 784
 785                 /* start dma */
 786                 viu_start_dma(dev);
 787                 spin_unlock_irqrestore(&dev->slock, flags);
 788         } else {
 789                 viu_stop_dma(dev);
 790                 dev->ovenable = 0;
 791         }
 792
 793         return 0;
 794 }
 795
 796 static int vidioc_g_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg)
 797 {
 798         struct viu_fh  *fh = priv;
 799         struct viu_dev *dev = fh->dev;
 800         struct v4l2_framebuffer *fb = arg;
 801
 802         *fb = dev->ovbuf;
 803         fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 804         return 0;
 805 }
 806
 807 static int vidioc_s_fbuf(struct file *file, void *priv, const struct v4l2_framebuffer *arg)
 808 {
 809         struct viu_fh  *fh = priv;
 810         struct viu_dev *dev = fh->dev;
 811         const struct v4l2_framebuffer *fb = arg;
 812         struct viu_fmt *fmt;
 813
 814         if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
 815                 return -EPERM;
 816
 817         /* check args */
 818         fmt = format_by_fourcc(fb->fmt.pixelformat);
 819         if (fmt == NULL)
 820                 return -EINVAL;
 821
 822         /* ok, accept it */
 823         dev->ovbuf = *fb;
 824         dev->ovfmt = fmt;
 825         if (dev->ovbuf.fmt.bytesperline == 0) {
 826                 dev->ovbuf.fmt.bytesperline =
 827                         dev->ovbuf.fmt.width * fmt->depth / 8;
 828         }
 829         return 0;
 830 }
 831
 832 static int vidioc_reqbufs(struct file *file, void *priv,
 833                                 struct v4l2_requestbuffers *p)
 834 {
 835         struct viu_fh *fh = priv;
 836
 837         return videobuf_reqbufs(&fh->vb_vidq, p);
 838 }
 839
 840 static int vidioc_querybuf(struct file *file, void *priv,
 841                                         struct v4l2_buffer *p)
 842 {
 843         struct viu_fh *fh = priv;
 844
 845         return videobuf_querybuf(&fh->vb_vidq, p);
 846 }
 847
 848 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 849 {
 850         struct viu_fh *fh = priv;
 851
 852         return videobuf_qbuf(&fh->vb_vidq, p);
 853 }
 854
 855 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
 856 {
 857         struct viu_fh *fh = priv;
 858
 859         return videobuf_dqbuf(&fh->vb_vidq, p,
 860                                 file->f_flags & O_NONBLOCK);
 861 }
 862
 863 static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i)
 864 {
 865         struct viu_fh *fh = priv;
 866         struct viu_dev *dev = fh->dev;
 867
 868         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 869                 return -EINVAL;
 870         if (fh->type != i)
 871                 return -EINVAL;
 872
 873         if (dev->ovenable)
 874                 dev->ovenable = 0;
 875
 876         viu_start_dma(fh->dev);
 877
 878         return videobuf_streamon(&fh->vb_vidq);
 879 }
 880
 881 static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
 882 {
 883         struct viu_fh  *fh = priv;
 884
 885         if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 886                 return -EINVAL;
 887         if (fh->type != i)
 888                 return -EINVAL;
 889
 890         viu_stop_dma(fh->dev);
 891
 892         return videobuf_streamoff(&fh->vb_vidq);
 893 }
 894
 895 #define decoder_call(viu, o, f, args...) \
 896         v4l2_subdev_call(viu->decoder, o, f, ##args)
 897
 898 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
 899 {
 900         struct viu_fh *fh = priv;
 901
 902         decoder_call(fh->dev, video, querystd, std_id);
 903         return 0;
 904 }
 905
 906 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
 907 {
 908         struct viu_fh *fh = priv;
 909
 910         fh->dev->std = id;
 911         decoder_call(fh->dev, video, s_std, id);
 912         return 0;
 913 }
 914
 915 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
 916 {
 917         struct viu_fh *fh = priv;
 918
 919         *std_id = fh->dev->std;
 920         return 0;
 921 }
 922
 923 /* only one input in this driver */
 924 static int vidioc_enum_input(struct file *file, void *priv,
 925                                         struct v4l2_input *inp)
 926 {
 927         struct viu_fh *fh = priv;
 928
 929         if (inp->index != 0)
 930                 return -EINVAL;
 931
 932         inp->type = V4L2_INPUT_TYPE_CAMERA;
 933         inp->std = fh->dev->vdev->tvnorms;
 934         strscpy(inp->name, "Camera", sizeof(inp->name));
 935         return 0;
 936 }
 937
 938 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 939 {
 940         *i = 0;
 941         return 0;
 942 }
 943
 944 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
 945 {
 946         struct viu_fh *fh = priv;
 947
 948         if (i)
 949                 return -EINVAL;
 950
 951         decoder_call(fh->dev, video, s_routing, i, 0, 0);
 952         return 0;
 953 }
 954
 955 inline void viu_activate_next_buf(struct viu_dev *dev,
 956                                 struct viu_dmaqueue *viuq)
 957 {
 958         struct viu_dmaqueue *vidq = viuq;
 959         struct viu_buf *buf;
 960
 961         /* launch another DMA operation for an active/queued buffer */
 962         if (!list_empty(&vidq->active)) {
 963                 buf = list_entry(vidq->active.next, struct viu_buf,
 964                                         vb.queue);
 965                 dprintk(1, "start another queued buffer: 0x%p\n", buf);
 966                 buffer_activate(dev, buf);
 967         } else if (!list_empty(&vidq->queued)) {
 968                 buf = list_entry(vidq->queued.next, struct viu_buf,
 969                                         vb.queue);
 970                 list_del(&buf->vb.queue);
 971
 972                 dprintk(1, "start another queued buffer: 0x%p\n", buf);
 973                 list_add_tail(&buf->vb.queue, &vidq->active);
 974                 buf->vb.state = VIDEOBUF_ACTIVE;
 975                 buffer_activate(dev, buf);
 976         }
 977 }
 978
 979 inline void viu_default_settings(struct viu_reg __iomem *vr)
 980 {
 981         out_be32(&vr->luminance, 0x9512A254);
 982         out_be32(&vr->chroma_r, 0x03310000);
 983         out_be32(&vr->chroma_g, 0x06600F38);
 984         out_be32(&vr->chroma_b, 0x00000409);
 985         out_be32(&vr->alpha, 0x000000ff);
 986         out_be32(&vr->req_alarm, 0x00000090);
 987         dprintk(1, "status reg: 0x%08x, field base: 0x%08x\n",
 988                 in_be32(&vr->status_cfg), in_be32(&vr->field_base_addr));
 989 }
 990
 991 static void viu_overlay_intr(struct viu_dev *dev, u32 status)
 992 {
 993         struct viu_reg __iomem *vr = dev->vr;
 994
 995         if (status & INT_DMA_END_STATUS)
 996                 dev->dma_done = 1;
 997
 998         if (status & INT_FIELD_STATUS) {
 999                 if (dev->dma_done) {
1000                         u32 addr = reg_val.field_base_addr;
1001
1002                         dev->dma_done = 0;
1003                         if (status & FIELD_NO)
1004                                 addr += reg_val.dma_inc;
1005
1006                         out_be32(&vr->field_base_addr, addr);
1007                         out_be32(&vr->dma_inc, reg_val.dma_inc);
1008                         out_be32(&vr->status_cfg,
1009                                  (status & 0xffc0ffff) |
1010                                  (status & INT_ALL_STATUS) |
1011                                  reg_val.status_cfg);
1012                 } else if (status & INT_VSYNC_STATUS) {
1013                         out_be32(&vr->status_cfg,
1014                                  (status & 0xffc0ffff) |
1015                                  (status & INT_ALL_STATUS) |
1016                                  reg_val.status_cfg);
1017                 }
1018         }
1019 }
1020
1021 static void viu_capture_intr(struct viu_dev *dev, u32 status)
1022 {
1023         struct viu_dmaqueue *vidq = &dev->vidq;
1024         struct viu_reg __iomem *vr = dev->vr;
1025         struct viu_buf *buf;
1026         int field_num;
1027         int need_two;
1028         int dma_done = 0;
1029
1030         field_num = status & FIELD_NO;
1031         need_two = V4L2_FIELD_HAS_BOTH(dev->capfield);
1032
1033         if (status & INT_DMA_END_STATUS) {
1034                 dma_done = 1;
1035                 if (((field_num == 0) && (dev->field == 0)) ||
1036                     (field_num && (dev->field == 1)))
1037                         dev->field++;
1038         }
1039
1040         if (status & INT_FIELD_STATUS) {
1041                 dprintk(1, "irq: field %d, done %d\n",
1042                         !!field_num, dma_done);
1043                 if (unlikely(dev->first)) {
1044                         if (field_num == 0) {
1045                                 dev->first = 0;
1046                                 dprintk(1, "activate first buf\n");
1047                                 viu_activate_next_buf(dev, vidq);
1048                         } else
1049                                 dprintk(1, "wait field 0\n");
1050                         return;
1051                 }
1052
1053                 /* setup buffer address for next dma operation */
1054                 if (!list_empty(&vidq->active)) {
1055                         u32 addr = reg_val.field_base_addr;
1056
1057                         if (field_num && need_two) {
1058                                 addr += reg_val.dma_inc;
1059                                 dprintk(1, "field 1, 0x%lx, dev field %d\n",
1060                                         (unsigned long)addr, dev->field);
1061                         }
1062                         out_be32(&vr->field_base_addr, addr);
1063                         out_be32(&vr->dma_inc, reg_val.dma_inc);
1064                         out_be32(&vr->status_cfg,
1065                                  (status & 0xffc0ffff) |
1066                                  (status & INT_ALL_STATUS) |
1067                                  reg_val.status_cfg);
1068                         return;
1069                 }
1070         }
1071
1072         if (dma_done && field_num && (dev->field == 2)) {
1073                 dev->field = 0;
1074                 buf = list_entry(vidq->active.next,
1075                                  struct viu_buf, vb.queue);
1076                 dprintk(1, "viu/0: [%p/%d] 0x%lx/0x%lx: dma complete\n",
1077                         buf, buf->vb.i,
1078                         (unsigned long)videobuf_to_dma_contig(&buf->vb),
1079                         (unsigned long)in_be32(&vr->field_base_addr));
1080
1081                 if (waitqueue_active(&buf->vb.done)) {
1082                         list_del(&buf->vb.queue);
1083                         buf->vb.ts = ktime_get_ns();
1084                         buf->vb.state = VIDEOBUF_DONE;
1085                         buf->vb.field_count++;
1086                         wake_up(&buf->vb.done);
1087                 }
1088                 /* activate next dma buffer */
1089                 viu_activate_next_buf(dev, vidq);
1090         }
1091 }
1092
1093 static irqreturn_t viu_intr(int irq, void *dev_id)
1094 {
1095         struct viu_dev *dev  = (struct viu_dev *)dev_id;
1096         struct viu_reg __iomem *vr = dev->vr;
1097         u32 status;
1098         u32 error;
1099
1100         status = in_be32(&vr->status_cfg);
1101
1102         if (status & INT_ERROR_STATUS) {
1103                 dev->irqs.error_irq++;
1104                 error = status & ERR_MASK;
1105                 if (error)
1106                         dprintk(1, "Err: error(%d), times:%d!\n",
1107                                 error >> 4, dev->irqs.error_irq);
1108                 /* Clear interrupt error bit and error flags */
1109                 out_be32(&vr->status_cfg,
1110                          (status & 0xffc0ffff) | INT_ERROR_STATUS);
1111         }
1112
1113         if (status & INT_DMA_END_STATUS) {
1114                 dev->irqs.dma_end_irq++;
1115                 dev->dma_done = 1;
1116                 dprintk(2, "VIU DMA end interrupt times: %d\n",
1117                                         dev->irqs.dma_end_irq);
1118         }
1119
1120         if (status & INT_HSYNC_STATUS)
1121                 dev->irqs.hsync_irq++;
1122
1123         if (status & INT_FIELD_STATUS) {
1124                 dev->irqs.field_irq++;
1125                 dprintk(2, "VIU field interrupt times: %d\n",
1126                                         dev->irqs.field_irq);
1127         }
1128
1129         if (status & INT_VSTART_STATUS)
1130                 dev->irqs.vstart_irq++;
1131
1132         if (status & INT_VSYNC_STATUS) {
1133                 dev->irqs.vsync_irq++;
1134                 dprintk(2, "VIU vsync interrupt times: %d\n",
1135                         dev->irqs.vsync_irq);
1136         }
1137
1138         /* clear all pending irqs */
1139         status = in_be32(&vr->status_cfg);
1140         out_be32(&vr->status_cfg,
1141                  (status & 0xffc0ffff) | (status & INT_ALL_STATUS));
1142
1143         if (dev->ovenable) {
1144                 viu_overlay_intr(dev, status);
1145                 return IRQ_HANDLED;
1146         }
1147
1148         /* Capture mode */
1149         viu_capture_intr(dev, status);
1150         return IRQ_HANDLED;
1151 }
1152
1153 /*
1154  * File operations for the device
1155  */
1156 static int viu_open(struct file *file)
1157 {
1158         struct video_device *vdev = video_devdata(file);
1159         struct viu_dev *dev = video_get_drvdata(vdev);
1160         struct viu_fh *fh;
1161         struct viu_reg __iomem *vr;
1162         int minor = vdev->minor;
1163         u32 status_cfg;
1164
1165         dprintk(1, "viu: open (minor=%d)\n", minor);
1166
1167         dev->users++;
1168         if (dev->users > 1) {
1169                 dev->users--;
1170                 return -EBUSY;
1171         }
1172
1173         vr = dev->vr;
1174
1175         dprintk(1, "open minor=%d type=%s users=%d\n", minor,
1176                 v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
1177
1178         if (mutex_lock_interruptible(&dev->lock)) {
1179                 dev->users--;
1180                 return -ERESTARTSYS;
1181         }
1182
1183         /* allocate and initialize per filehandle data */
1184         fh = kzalloc(sizeof(*fh), GFP_KERNEL);
1185         if (!fh) {
1186                 dev->users--;
1187                 mutex_unlock(&dev->lock);
1188                 return -ENOMEM;
1189         }
1190
1191         v4l2_fh_init(&fh->fh, vdev);
1192         file->private_data = fh;
1193         fh->dev = dev;
1194
1195         fh->type     = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1196         fh->fmt      = format_by_fourcc(V4L2_PIX_FMT_RGB32);
1197         fh->width    = norm_maxw();
1198         fh->height   = norm_maxh();
1199         dev->crop_current.width  = fh->width;
1200         dev->crop_current.height = fh->height;
1201
1202         dprintk(1, "Open: fh=%p, dev=%p, dev->vidq=%p\n", fh, dev, &dev->vidq);
1203         dprintk(1, "Open: list_empty queued=%d\n",
1204                 list_empty(&dev->vidq.queued));
1205         dprintk(1, "Open: list_empty active=%d\n",
1206                 list_empty(&dev->vidq.active));
1207
1208         viu_default_settings(vr);
1209
1210         status_cfg = in_be32(&vr->status_cfg);
1211         out_be32(&vr->status_cfg,
1212                  status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN |
1213                                 INT_FIELD_EN | INT_VSTART_EN |
1214                                 INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN));
1215
1216         status_cfg = in_be32(&vr->status_cfg);
1217         out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS);
1218
1219         spin_lock_init(&fh->vbq_lock);
1220         videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops,
1221                                        dev->dev, &fh->vbq_lock,
1222                                        fh->type, V4L2_FIELD_INTERLACED,
1223                                        sizeof(struct viu_buf), fh,
1224                                        &fh->dev->lock);
1225         v4l2_fh_add(&fh->fh);
1226         mutex_unlock(&dev->lock);
1227         return 0;
1228 }
1229
1230 static ssize_t viu_read(struct file *file, char __user *data, size_t count,
1231                         loff_t *ppos)
1232 {
1233         struct viu_fh *fh = file->private_data;
1234         struct viu_dev *dev = fh->dev;
1235         int ret = 0;
1236
1237         dprintk(2, "%s\n", __func__);
1238         if (dev->ovenable)
1239                 dev->ovenable = 0;
1240
1241         if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1242                 if (mutex_lock_interruptible(&dev->lock))
1243                         return -ERESTARTSYS;
1244                 viu_start_dma(dev);
1245                 ret = videobuf_read_stream(&fh->vb_vidq, data, count,
1246                                 ppos, 0, file->f_flags & O_NONBLOCK);
1247                 mutex_unlock(&dev->lock);
1248                 return ret;
1249         }
1250         return 0;
1251 }
1252
1253 static __poll_t viu_poll(struct file *file, struct poll_table_struct *wait)
1254 {
1255         struct viu_fh *fh = file->private_data;
1256         struct videobuf_queue *q = &fh->vb_vidq;
1257         struct viu_dev *dev = fh->dev;
1258         __poll_t req_events = poll_requested_events(wait);
1259         __poll_t res = v4l2_ctrl_poll(file, wait);
1260
1261         if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1262                 return EPOLLERR;
1263
1264         if (!(req_events & (EPOLLIN | EPOLLRDNORM)))
1265                 return res;
1266
1267         mutex_lock(&dev->lock);
1268         res |= videobuf_poll_stream(file, q, wait);
1269         mutex_unlock(&dev->lock);
1270         return res;
1271 }
1272
1273 static int viu_release(struct file *file)
1274 {
1275         struct viu_fh *fh = file->private_data;
1276         struct viu_dev *dev = fh->dev;
1277         int minor = video_devdata(file)->minor;
1278
1279         mutex_lock(&dev->lock);
1280         viu_stop_dma(dev);
1281         videobuf_stop(&fh->vb_vidq);
1282         videobuf_mmap_free(&fh->vb_vidq);
1283         v4l2_fh_del(&fh->fh);
1284         v4l2_fh_exit(&fh->fh);
1285         mutex_unlock(&dev->lock);
1286
1287         kfree(fh);
1288
1289         dev->users--;
1290         dprintk(1, "close (minor=%d, users=%d)\n",
1291                 minor, dev->users);
1292         return 0;
1293 }
1294
1295 static void viu_reset(struct viu_reg __iomem *reg)
1296 {
1297         out_be32(&reg->status_cfg, 0);
1298         out_be32(&reg->luminance, 0x9512a254);
1299         out_be32(&reg->chroma_r, 0x03310000);
1300         out_be32(&reg->chroma_g, 0x06600f38);
1301         out_be32(&reg->chroma_b, 0x00000409);
1302         out_be32(&reg->field_base_addr, 0);
1303         out_be32(&reg->dma_inc, 0);
1304         out_be32(&reg->picture_count, 0x01e002d0);
1305         out_be32(&reg->req_alarm, 0x00000090);
1306         out_be32(&reg->alpha, 0x000000ff);
1307 }
1308
1309 static int viu_mmap(struct file *file, struct vm_area_struct *vma)
1310 {
1311         struct viu_fh *fh = file->private_data;
1312         struct viu_dev *dev = fh->dev;
1313         int ret;
1314
1315         dprintk(1, "mmap called, vma=%p\n", vma);
1316
1317         if (mutex_lock_interruptible(&dev->lock))
1318                 return -ERESTARTSYS;
1319         ret = videobuf_mmap_mapper(&fh->vb_vidq, vma);
1320         mutex_unlock(&dev->lock);
1321
1322         dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n",
1323                 (unsigned long)vma->vm_start,
1324                 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1325                 ret);
1326
1327         return ret;
1328 }
1329
1330 static const struct v4l2_file_operations viu_fops = {
1331         .owner          = THIS_MODULE,
1332         .open           = viu_open,
1333         .release        = viu_release,
1334         .read           = viu_read,
1335         .poll           = viu_poll,
1336         .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
1337         .mmap           = viu_mmap,
1338 };
1339
1340 static const struct v4l2_ioctl_ops viu_ioctl_ops = {
1341         .vidioc_querycap        = vidioc_querycap,
1342         .vidioc_enum_fmt_vid_cap  = vidioc_enum_fmt,
1343         .vidioc_g_fmt_vid_cap     = vidioc_g_fmt_cap,
1344         .vidioc_try_fmt_vid_cap   = vidioc_try_fmt_cap,
1345         .vidioc_s_fmt_vid_cap     = vidioc_s_fmt_cap,
1346         .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt,
1347         .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay,
1348         .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay,
1349         .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay,
1350         .vidioc_overlay       = vidioc_overlay,
1351         .vidioc_g_fbuf        = vidioc_g_fbuf,
1352         .vidioc_s_fbuf        = vidioc_s_fbuf,
1353         .vidioc_reqbufs       = vidioc_reqbufs,
1354         .vidioc_querybuf      = vidioc_querybuf,
1355         .vidioc_qbuf          = vidioc_qbuf,
1356         .vidioc_dqbuf         = vidioc_dqbuf,
1357         .vidioc_g_std         = vidioc_g_std,
1358         .vidioc_s_std         = vidioc_s_std,
1359         .vidioc_querystd      = vidioc_querystd,
1360         .vidioc_enum_input    = vidioc_enum_input,
1361         .vidioc_g_input       = vidioc_g_input,
1362         .vidioc_s_input       = vidioc_s_input,
1363         .vidioc_streamon      = vidioc_streamon,
1364         .vidioc_streamoff     = vidioc_streamoff,
1365         .vidioc_log_status    = v4l2_ctrl_log_status,
1366         .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1367         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1368 };
1369
1370 static const struct video_device viu_template = {
1371         .name           = "FSL viu",
1372         .fops           = &viu_fops,
1373         .minor          = -1,
1374         .ioctl_ops      = &viu_ioctl_ops,
1375         .release        = video_device_release,
1376
1377         .tvnorms        = V4L2_STD_NTSC_M | V4L2_STD_PAL,
1378         .device_caps    = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
1379                           V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_READWRITE,
1380 };
1381
1382 static int viu_of_probe(struct platform_device *op)
1383 {
1384         struct viu_dev *viu_dev;
1385         struct video_device *vdev;
1386         struct resource r;
1387         struct viu_reg __iomem *viu_regs;
1388         struct i2c_adapter *ad;
1389         int ret, viu_irq;
1390         struct clk *clk;
1391
1392         ret = of_address_to_resource(op->dev.of_node, 0, &r);
1393         if (ret) {
1394                 dev_err(&op->dev, "Can't parse device node resource\n");
1395                 return -ENODEV;
1396         }
1397
1398         viu_irq = irq_of_parse_and_map(op->dev.of_node, 0);
1399         if (!viu_irq) {
1400                 dev_err(&op->dev, "Error while mapping the irq\n");
1401                 return -EINVAL;
1402         }
1403
1404         /* request mem region */
1405         if (!devm_request_mem_region(&op->dev, r.start,
1406                                      sizeof(struct viu_reg), DRV_NAME)) {
1407                 dev_err(&op->dev, "Error while requesting mem region\n");
1408                 ret = -EBUSY;
1409                 goto err_irq;
1410         }
1411
1412         /* remap registers */
1413         viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg));
1414         if (!viu_regs) {
1415                 dev_err(&op->dev, "Can't map register set\n");
1416                 ret = -ENOMEM;
1417                 goto err_irq;
1418         }
1419
1420         /* Prepare our private structure */
1421         viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC);
1422         if (!viu_dev) {
1423                 dev_err(&op->dev, "Can't allocate private structure\n");
1424                 ret = -ENOMEM;
1425                 goto err_irq;
1426         }
1427
1428         viu_dev->vr = viu_regs;
1429         viu_dev->irq = viu_irq;
1430         viu_dev->dev = &op->dev;
1431
1432         /* init video dma queues */
1433         INIT_LIST_HEAD(&viu_dev->vidq.active);
1434         INIT_LIST_HEAD(&viu_dev->vidq.queued);
1435
1436         snprintf(viu_dev->v4l2_dev.name,
1437                  sizeof(viu_dev->v4l2_dev.name), "%s", "VIU");
1438         ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev);
1439         if (ret < 0) {
1440                 dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret);
1441                 goto err_irq;
1442         }
1443
1444         ad = i2c_get_adapter(0);
1445         if (!ad) {
1446                 ret = -EFAULT;
1447                 dev_err(&op->dev, "couldn't get i2c adapter\n");
1448                 goto err_v4l2;
1449         }
1450
1451         v4l2_ctrl_handler_init(&viu_dev->hdl, 5);
1452         if (viu_dev->hdl.error) {
1453                 ret = viu_dev->hdl.error;
1454                 dev_err(&op->dev, "couldn't register control\n");
1455                 goto err_i2c;
1456         }
1457         /* This control handler will inherit the control(s) from the
1458            sub-device(s). */
1459         viu_dev->v4l2_dev.ctrl_handler = &viu_dev->hdl;
1460         viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad,
1461                         "saa7113", VIU_VIDEO_DECODER_ADDR, NULL);
1462
1463         timer_setup(&viu_dev->vidq.timeout, viu_vid_timeout, 0);
1464         viu_dev->std = V4L2_STD_NTSC_M;
1465         viu_dev->first = 1;
1466
1467         /* Allocate memory for video device */
1468         vdev = video_device_alloc();
1469         if (vdev == NULL) {
1470                 ret = -ENOMEM;
1471                 goto err_hdl;
1472         }
1473
1474         *vdev = viu_template;
1475
1476         vdev->v4l2_dev = &viu_dev->v4l2_dev;
1477
1478         viu_dev->vdev = vdev;
1479
1480         /* initialize locks */
1481         mutex_init(&viu_dev->lock);
1482         viu_dev->vdev->lock = &viu_dev->lock;
1483         spin_lock_init(&viu_dev->slock);
1484
1485         video_set_drvdata(viu_dev->vdev, viu_dev);
1486
1487         mutex_lock(&viu_dev->lock);
1488
1489         ret = video_register_device(viu_dev->vdev, VFL_TYPE_GRABBER, -1);
1490         if (ret < 0) {
1491                 video_device_release(viu_dev->vdev);
1492                 goto err_unlock;
1493         }
1494
1495         /* enable VIU clock */
1496         clk = devm_clk_get(&op->dev, "ipg");
1497         if (IS_ERR(clk)) {
1498                 dev_err(&op->dev, "failed to lookup the clock!\n");
1499                 ret = PTR_ERR(clk);
1500                 goto err_vdev;
1501         }
1502         ret = clk_prepare_enable(clk);
1503         if (ret) {
1504                 dev_err(&op->dev, "failed to enable the clock!\n");
1505                 goto err_vdev;
1506         }
1507         viu_dev->clk = clk;
1508
1509         /* reset VIU module */
1510         viu_reset(viu_dev->vr);
1511
1512         /* install interrupt handler */
1513         if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) {
1514                 dev_err(&op->dev, "Request VIU IRQ failed.\n");
1515                 ret = -ENODEV;
1516                 goto err_clk;
1517         }
1518
1519         mutex_unlock(&viu_dev->lock);
1520
1521         dev_info(&op->dev, "Freescale VIU Video Capture Board\n");
1522         return ret;
1523
1524 err_clk:
1525         clk_disable_unprepare(viu_dev->clk);
1526 err_vdev:
1527         video_unregister_device(viu_dev->vdev);
1528 err_unlock:
1529         mutex_unlock(&viu_dev->lock);
1530 err_hdl:
1531         v4l2_ctrl_handler_free(&viu_dev->hdl);
1532 err_i2c:
1533         i2c_put_adapter(ad);
1534 err_v4l2:
1535         v4l2_device_unregister(&viu_dev->v4l2_dev);
1536 err_irq:
1537         irq_dispose_mapping(viu_irq);
1538         return ret;
1539 }
1540
1541 static int viu_of_remove(struct platform_device *op)
1542 {
1543         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1544         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1545         struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next,
1546                                               struct v4l2_subdev, list);
1547         struct i2c_client *client = v4l2_get_subdevdata(sdev);
1548
1549         free_irq(dev->irq, (void *)dev);
1550         irq_dispose_mapping(dev->irq);
1551
1552         clk_disable_unprepare(dev->clk);
1553
1554         v4l2_ctrl_handler_free(&dev->hdl);
1555         video_unregister_device(dev->vdev);
1556         i2c_put_adapter(client->adapter);
1557         v4l2_device_unregister(&dev->v4l2_dev);
1558         return 0;
1559 }
1560
1561 #ifdef CONFIG_PM
1562 static int viu_suspend(struct platform_device *op, pm_message_t state)
1563 {
1564         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1565         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1566
1567         clk_disable(dev->clk);
1568         return 0;
1569 }
1570
1571 static int viu_resume(struct platform_device *op)
1572 {
1573         struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev);
1574         struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev);
1575
1576         clk_enable(dev->clk);
1577         return 0;
1578 }
1579 #endif
1580
1581 /*
1582  * Initialization and module stuff
1583  */
1584 static const struct of_device_id mpc512x_viu_of_match[] = {
1585         {
1586                 .compatible = "fsl,mpc5121-viu",
1587         },
1588         {},
1589 };
1590 MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match);
1591
1592 static struct platform_driver viu_of_platform_driver = {
1593         .probe = viu_of_probe,
1594         .remove = viu_of_remove,
1595 #ifdef CONFIG_PM
1596         .suspend = viu_suspend,
1597         .resume = viu_resume,
1598 #endif
1599         .driver = {
1600                 .name = DRV_NAME,
1601                 .of_match_table = mpc512x_viu_of_match,
1602         },
1603 };
1604
1605 module_platform_driver(viu_of_platform_driver);
1606
1607 MODULE_DESCRIPTION("Freescale Video-In(VIU)");
1608 MODULE_AUTHOR("Hongjun Chen");
1609 MODULE_LICENSE("GPL");
1610 MODULE_VERSION(VIU_VERSION);