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zoran_driver.c

/*
 * Zoran zr36057/zr36067 PCI controller driver, for the
 * Pinnacle/Miro DC10/DC10+/DC30/DC30+, Iomega Buz, Linux
 * Media Labs LML33/LML33R10.
 *
 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
 *
 * Changes for BUZ by Wolfgang Scherr <scherr@net4you.net>
 *
 * Changes for DC10/DC30 by Laurent Pinchart <laurent.pinchart@skynet.be>
 *
 * Changes for LML33R10 by Maxim Yevtyushkin <max@linuxmedialabs.com>
 *
 * Changes for videodev2/v4l2 by Ronald Bultje <rbultje@ronald.bitfreak.net>
 *
 * Based on
 *
 * Miro DC10 driver
 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
 *
 * Iomega Buz driver version 1.0
 * Copyright (C) 1999 Rainer Johanni <Rainer@Johanni.de>
 *
 * buz.0.0.3
 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
 *
 * bttv - Bt848 frame grabber driver
 * Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@thp.uni-koeln.de)
 *                        & Marcus Metzler (mocm@thp.uni-koeln.de)
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/version.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/pci.h>
#include <linux/vmalloc.h>
#include <linux/wait.h>

#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>

#include <linux/spinlock.h>

#include <linux/videodev.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include "videocodec.h"

#include <asm/byteorder.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/proc_fs.h>

#include <linux/mutex.h>
#include "zoran.h"
#include "zoran_device.h"
#include "zoran_card.h"


const struct zoran_format zoran_formats[] = {
      {
            .name = "15-bit RGB LE",
            .fourcc = V4L2_PIX_FMT_RGB555,
            .colorspace = V4L2_COLORSPACE_SRGB,
            .depth = 15,
            .flags = ZORAN_FORMAT_CAPTURE |
                   ZORAN_FORMAT_OVERLAY,
            .vfespfr = ZR36057_VFESPFR_RGB555|ZR36057_VFESPFR_ErrDif|
                     ZR36057_VFESPFR_LittleEndian,
      }, {
            .name = "15-bit RGB BE",
            .fourcc = V4L2_PIX_FMT_RGB555X,
            .colorspace = V4L2_COLORSPACE_SRGB,
            .depth = 15,
            .flags = ZORAN_FORMAT_CAPTURE |
                   ZORAN_FORMAT_OVERLAY,
            .vfespfr = ZR36057_VFESPFR_RGB555|ZR36057_VFESPFR_ErrDif,
      }, {
            .name = "16-bit RGB LE",
            .fourcc = V4L2_PIX_FMT_RGB565,
            .colorspace = V4L2_COLORSPACE_SRGB,
            .depth = 16,
            .flags = ZORAN_FORMAT_CAPTURE |
                   ZORAN_FORMAT_OVERLAY,
            .vfespfr = ZR36057_VFESPFR_RGB565|ZR36057_VFESPFR_ErrDif|
                     ZR36057_VFESPFR_LittleEndian,
      }, {
            .name = "16-bit RGB BE",
            .fourcc = V4L2_PIX_FMT_RGB565X,
            .colorspace = V4L2_COLORSPACE_SRGB,
            .depth = 16,
            .flags = ZORAN_FORMAT_CAPTURE |
                   ZORAN_FORMAT_OVERLAY,
            .vfespfr = ZR36057_VFESPFR_RGB565|ZR36057_VFESPFR_ErrDif,
      }, {
            .name = "24-bit RGB",
            .fourcc = V4L2_PIX_FMT_BGR24,
            .colorspace = V4L2_COLORSPACE_SRGB,
            .depth = 24,
            .flags = ZORAN_FORMAT_CAPTURE |
                   ZORAN_FORMAT_OVERLAY,
            .vfespfr = ZR36057_VFESPFR_RGB888|ZR36057_VFESPFR_Pack24,
      }, {
            .name = "32-bit RGB LE",
            .fourcc = V4L2_PIX_FMT_BGR32,
            .colorspace = V4L2_COLORSPACE_SRGB,
            .depth = 32,
            .flags = ZORAN_FORMAT_CAPTURE |
                   ZORAN_FORMAT_OVERLAY,
            .vfespfr = ZR36057_VFESPFR_RGB888|ZR36057_VFESPFR_LittleEndian,
      }, {
            .name = "32-bit RGB BE",
            .fourcc = V4L2_PIX_FMT_RGB32,
            .colorspace = V4L2_COLORSPACE_SRGB,
            .depth = 32,
            .flags = ZORAN_FORMAT_CAPTURE |
                   ZORAN_FORMAT_OVERLAY,
            .vfespfr = ZR36057_VFESPFR_RGB888,
      }, {
            .name = "4:2:2, packed, YUYV",
            .fourcc = V4L2_PIX_FMT_YUYV,
            .colorspace = V4L2_COLORSPACE_SMPTE170M,
            .depth = 16,
            .flags = ZORAN_FORMAT_CAPTURE |
                   ZORAN_FORMAT_OVERLAY,
            .vfespfr = ZR36057_VFESPFR_YUV422,
      }, {
            .name = "4:2:2, packed, UYVY",
            .fourcc = V4L2_PIX_FMT_UYVY,
            .colorspace = V4L2_COLORSPACE_SMPTE170M,
            .depth = 16,
            .flags = ZORAN_FORMAT_CAPTURE |
                   ZORAN_FORMAT_OVERLAY,
            .vfespfr = ZR36057_VFESPFR_YUV422|ZR36057_VFESPFR_LittleEndian,
      }, {
            .name = "Hardware-encoded Motion-JPEG",
            .fourcc = V4L2_PIX_FMT_MJPEG,
            .colorspace = V4L2_COLORSPACE_SMPTE170M,
            .depth = 0,
            .flags = ZORAN_FORMAT_CAPTURE |
                   ZORAN_FORMAT_PLAYBACK |
                   ZORAN_FORMAT_COMPRESSED,
      }
};
#define NUM_FORMATS ARRAY_SIZE(zoran_formats)

      /* small helper function for calculating buffersizes for v4l2
       * we calculate the nearest higher power-of-two, which
       * will be the recommended buffersize */
static __u32
zoran_v4l2_calc_bufsize (struct zoran_jpg_settings *settings)
{
      __u8 div = settings->VerDcm * settings->HorDcm * settings->TmpDcm;
      __u32 num = (1024 * 512) / (div);
      __u32 result = 2;

      num--;
      while (num) {
            num >>= 1;
            result <<= 1;
      }

      if (result > jpg_bufsize)
            return jpg_bufsize;
      if (result < 8192)
            return 8192;
      return result;
}

/* forward references */
static void v4l_fbuffer_free(struct zoran_fh *fh);
static void jpg_fbuffer_free(struct zoran_fh *fh);

/* Set mapping mode */
static void map_mode_raw(struct zoran_fh *fh)
{
      fh->map_mode = ZORAN_MAP_MODE_RAW;
      fh->buffers.buffer_size = v4l_bufsize;
      fh->buffers.num_buffers = v4l_nbufs;
}
static void map_mode_jpg(struct zoran_fh *fh, int play)
{
      fh->map_mode = play ? ZORAN_MAP_MODE_JPG_PLAY : ZORAN_MAP_MODE_JPG_REC;
      fh->buffers.buffer_size = jpg_bufsize;
      fh->buffers.num_buffers = jpg_nbufs;
}
static inline const char *mode_name(enum zoran_map_mode mode)
{
      return mode == ZORAN_MAP_MODE_RAW ? "V4L" : "JPG";
}

/*
 *   Allocate the V4L grab buffers
 *
 *   These have to be pysically contiguous.
 */

static int v4l_fbuffer_alloc(struct zoran_fh *fh)
{
      struct zoran *zr = fh->zr;
      int i, off;
      unsigned char *mem;

      for (i = 0; i < fh->buffers.num_buffers; i++) {
            if (fh->buffers.buffer[i].v4l.fbuffer)
                  dprintk(2,
                        KERN_WARNING
                        "%s: %s - buffer %d already allocated!?\n",
                        ZR_DEVNAME(zr), __func__, i);

            //udelay(20);
            mem = kmalloc(fh->buffers.buffer_size,
                        GFP_KERNEL | __GFP_NOWARN);
            if (!mem) {
                  dprintk(1,
                        KERN_ERR
                        "%s: %s - kmalloc for V4L buf %d failed\n",
                        ZR_DEVNAME(zr), __func__, i);
                  v4l_fbuffer_free(fh);
                  return -ENOBUFS;
            }
            fh->buffers.buffer[i].v4l.fbuffer = mem;
            fh->buffers.buffer[i].v4l.fbuffer_phys = virt_to_phys(mem);
            fh->buffers.buffer[i].v4l.fbuffer_bus = virt_to_bus(mem);
            for (off = 0; off < fh->buffers.buffer_size;
                 off += PAGE_SIZE)
                  SetPageReserved(virt_to_page(mem + off));
            dprintk(4,
                  KERN_INFO
                  "%s: %s - V4L frame %d mem 0x%lx (bus: 0x%llx)\n",
                  ZR_DEVNAME(zr), __func__, i, (unsigned long) mem,
                  (unsigned long long)virt_to_bus(mem));
      }

      fh->buffers.allocated = 1;

      return 0;
}

/* free the V4L grab buffers */
static void v4l_fbuffer_free(struct zoran_fh *fh)
{
      struct zoran *zr = fh->zr;
      int i, off;
      unsigned char *mem;

      dprintk(4, KERN_INFO "%s: %s\n", ZR_DEVNAME(zr), __func__);

      for (i = 0; i < fh->buffers.num_buffers; i++) {
            if (!fh->buffers.buffer[i].v4l.fbuffer)
                  continue;

            mem = fh->buffers.buffer[i].v4l.fbuffer;
            for (off = 0; off < fh->buffers.buffer_size;
                 off += PAGE_SIZE)
                  ClearPageReserved(virt_to_page(mem + off));
            kfree(fh->buffers.buffer[i].v4l.fbuffer);
            fh->buffers.buffer[i].v4l.fbuffer = NULL;
      }

      fh->buffers.allocated = 0;
}

/*
 *   Allocate the MJPEG grab buffers.
 *
 *   If a Natoma chipset is present and this is a revision 1 zr36057,
 *   each MJPEG buffer needs to be physically contiguous.
 *   (RJ: This statement is from Dave Perks' original driver,
 *   I could never check it because I have a zr36067)
 *
 *   RJ: The contents grab buffers needs never be accessed in the driver.
 *       Therefore there is no need to allocate them with vmalloc in order
 *       to get a contiguous virtual memory space.
 *       I don't understand why many other drivers first allocate them with
 *       vmalloc (which uses internally also get_zeroed_page, but delivers you
 *       virtual addresses) and then again have to make a lot of efforts
 *       to get the physical address.
 *
 *   Ben Capper:
 *       On big-endian architectures (such as ppc) some extra steps
 *       are needed. When reading and writing to the stat_com array
 *       and fragment buffers, the device expects to see little-
 *       endian values. The use of cpu_to_le32() and le32_to_cpu()
 *       in this function (and one or two others in zoran_device.c)
 *       ensure that these values are always stored in little-endian
 *       form, regardless of architecture. The zr36057 does Very Bad
 *       Things on big endian architectures if the stat_com array
 *       and fragment buffers are not little-endian.
 */

static int jpg_fbuffer_alloc(struct zoran_fh *fh)
{
      struct zoran *zr = fh->zr;
      int i, j, off;
      u8 *mem;

      for (i = 0; i < fh->buffers.num_buffers; i++) {
            if (fh->buffers.buffer[i].jpg.frag_tab)
                  dprintk(2,
                        KERN_WARNING
                        "%s: %s - buffer %d already allocated!?\n",
                        ZR_DEVNAME(zr), __func__, i);

            /* Allocate fragment table for this buffer */

            mem = (void *)get_zeroed_page(GFP_KERNEL);
            if (mem == 0) {
                  dprintk(1,
                        KERN_ERR
                        "%s: %s - get_zeroed_page (frag_tab) failed for buffer %d\n",
                        ZR_DEVNAME(zr), __func__, i);
                  jpg_fbuffer_free(fh);
                  return -ENOBUFS;
            }
            fh->buffers.buffer[i].jpg.frag_tab = (__le32 *)mem;
            fh->buffers.buffer[i].jpg.frag_tab_bus = virt_to_bus(mem);

            if (fh->buffers.need_contiguous) {
                  mem = kmalloc(fh->buffers.buffer_size, GFP_KERNEL);
                  if (mem == NULL) {
                        dprintk(1,
                              KERN_ERR
                              "%s: %s - kmalloc failed for buffer %d\n",
                              ZR_DEVNAME(zr), __func__, i);
                        jpg_fbuffer_free(fh);
                        return -ENOBUFS;
                  }
                  fh->buffers.buffer[i].jpg.frag_tab[0] =
                        cpu_to_le32(virt_to_bus(mem));
                  fh->buffers.buffer[i].jpg.frag_tab[1] =
                        cpu_to_le32((fh->buffers.buffer_size >> 1) | 1);
                  for (off = 0; off < fh->buffers.buffer_size; off += PAGE_SIZE)
                        SetPageReserved(virt_to_page(mem + off));
            } else {
                  /* jpg_bufsize is already page aligned */
                  for (j = 0; j < fh->buffers.buffer_size / PAGE_SIZE; j++) {
                        mem = (void *)get_zeroed_page(GFP_KERNEL);
                        if (mem == NULL) {
                              dprintk(1,
                                    KERN_ERR
                                    "%s: %s - get_zeroed_page failed for buffer %d\n",
                                    ZR_DEVNAME(zr), __func__, i);
                              jpg_fbuffer_free(fh);
                              return -ENOBUFS;
                        }

                        fh->buffers.buffer[i].jpg.frag_tab[2 * j] =
                              cpu_to_le32(virt_to_bus(mem));
                        fh->buffers.buffer[i].jpg.frag_tab[2 * j + 1] =
                              cpu_to_le32((PAGE_SIZE >> 2) << 1);
                        SetPageReserved(virt_to_page(mem));
                  }

                  fh->buffers.buffer[i].jpg.frag_tab[2 * j - 1] |= cpu_to_le32(1);
            }
      }

      dprintk(4,
            KERN_DEBUG "%s: %s - %d KB allocated\n",
            ZR_DEVNAME(zr), __func__,
            (fh->buffers.num_buffers * fh->buffers.buffer_size) >> 10);

      fh->buffers.allocated = 1;

      return 0;
}

/* free the MJPEG grab buffers */
static void jpg_fbuffer_free(struct zoran_fh *fh)
{
      struct zoran *zr = fh->zr;
      int i, j, off;
      unsigned char *mem;
      __le32 frag_tab;
      struct zoran_buffer *buffer;

      dprintk(4, KERN_DEBUG "%s: %s\n", ZR_DEVNAME(zr), __func__);

      for (i = 0, buffer = &fh->buffers.buffer[0];
           i < fh->buffers.num_buffers; i++, buffer++) {
            if (!buffer->jpg.frag_tab)
                  continue;

            if (fh->buffers.need_contiguous) {
                  frag_tab = buffer->jpg.frag_tab[0];

                  if (frag_tab) {
                        mem = bus_to_virt(le32_to_cpu(frag_tab));
                        for (off = 0; off < fh->buffers.buffer_size; off += PAGE_SIZE)
                              ClearPageReserved(virt_to_page(mem + off));
                        kfree(mem);
                        buffer->jpg.frag_tab[0] = 0;
                        buffer->jpg.frag_tab[1] = 0;
                  }
            } else {
                  for (j = 0; j < fh->buffers.buffer_size / PAGE_SIZE; j++) {
                        frag_tab = buffer->jpg.frag_tab[2 * j];

                        if (!frag_tab)
                              break;
                        ClearPageReserved(virt_to_page(bus_to_virt(le32_to_cpu(frag_tab))));
                        free_page((unsigned long)bus_to_virt(le32_to_cpu(frag_tab)));
                        buffer->jpg.frag_tab[2 * j] = 0;
                        buffer->jpg.frag_tab[2 * j + 1] = 0;
                  }
            }

            free_page((unsigned long)buffer->jpg.frag_tab);
            buffer->jpg.frag_tab = NULL;
      }

      fh->buffers.allocated = 0;
}

/*
 *   V4L Buffer grabbing
 */

static int
zoran_v4l_set_format (struct zoran_fh           *fh,
                  int                        width,
                  int                        height,
                  const struct zoran_format *format)
{
      struct zoran *zr = fh->zr;
      int bpp;

      /* Check size and format of the grab wanted */

      if (height < BUZ_MIN_HEIGHT || width < BUZ_MIN_WIDTH ||
          height > BUZ_MAX_HEIGHT || width > BUZ_MAX_WIDTH) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - wrong frame size (%dx%d)\n",
                  ZR_DEVNAME(zr), __func__, width, height);
            return -EINVAL;
      }

      bpp = (format->depth + 7) / 8;

      /* Check against available buffer size */
      if (height * width * bpp > fh->buffers.buffer_size) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - video buffer size (%d kB) is too small\n",
                  ZR_DEVNAME(zr), __func__, fh->buffers.buffer_size >> 10);
            return -EINVAL;
      }

      /* The video front end needs 4-byte alinged line sizes */

      if ((bpp == 2 && (width & 1)) || (bpp == 3 && (width & 3))) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - wrong frame alignment\n",
                  ZR_DEVNAME(zr), __func__);
            return -EINVAL;
      }

      fh->v4l_settings.width = width;
      fh->v4l_settings.height = height;
      fh->v4l_settings.format = format;
      fh->v4l_settings.bytesperline = bpp * fh->v4l_settings.width;

      return 0;
}

static int zoran_v4l_queue_frame(struct zoran_fh *fh, int num)
{
      struct zoran *zr = fh->zr;
      unsigned long flags;
      int res = 0;

      if (!fh->buffers.allocated) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - buffers not yet allocated\n",
                  ZR_DEVNAME(zr), __func__);
            res = -ENOMEM;
      }

      /* No grabbing outside the buffer range! */
      if (num >= fh->buffers.num_buffers || num < 0) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - buffer %d is out of range\n",
                  ZR_DEVNAME(zr), __func__, num);
            res = -EINVAL;
      }

      spin_lock_irqsave(&zr->spinlock, flags);

      if (fh->buffers.active == ZORAN_FREE) {
            if (zr->v4l_buffers.active == ZORAN_FREE) {
                  zr->v4l_buffers = fh->buffers;
                  fh->buffers.active = ZORAN_ACTIVE;
            } else {
                  dprintk(1,
                        KERN_ERR
                        "%s: %s - another session is already capturing\n",
                        ZR_DEVNAME(zr), __func__);
                  res = -EBUSY;
            }
      }

      /* make sure a grab isn't going on currently with this buffer */
      if (!res) {
            switch (zr->v4l_buffers.buffer[num].state) {
            default:
            case BUZ_STATE_PEND:
                  if (zr->v4l_buffers.active == ZORAN_FREE) {
                        fh->buffers.active = ZORAN_FREE;
                        zr->v4l_buffers.allocated = 0;
                  }
                  res = -EBUSY;     /* what are you doing? */
                  break;
            case BUZ_STATE_DONE:
                  dprintk(2,
                        KERN_WARNING
                        "%s: %s - queueing buffer %d in state DONE!?\n",
                        ZR_DEVNAME(zr), __func__, num);
            case BUZ_STATE_USER:
                  /* since there is at least one unused buffer there's room for at least
                   * one more pend[] entry */
                  zr->v4l_pend[zr->v4l_pend_head++ & V4L_MASK_FRAME] = num;
                  zr->v4l_buffers.buffer[num].state = BUZ_STATE_PEND;
                  zr->v4l_buffers.buffer[num].bs.length =
                      fh->v4l_settings.bytesperline *
                      zr->v4l_settings.height;
                  fh->buffers.buffer[num] = zr->v4l_buffers.buffer[num];
                  break;
            }
      }

      spin_unlock_irqrestore(&zr->spinlock, flags);

      if (!res && zr->v4l_buffers.active == ZORAN_FREE)
            zr->v4l_buffers.active = fh->buffers.active;

      return res;
}

/*
 * Sync on a V4L buffer
 */

static int v4l_sync(struct zoran_fh *fh, int frame)
{
      struct zoran *zr = fh->zr;
      unsigned long flags;

      if (fh->buffers.active == ZORAN_FREE) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - no grab active for this session\n",
                  ZR_DEVNAME(zr), __func__);
            return -EINVAL;
      }

      /* check passed-in frame number */
      if (frame >= fh->buffers.num_buffers || frame < 0) {
            dprintk(1,
                  KERN_ERR "%s: %s - frame %d is invalid\n",
                  ZR_DEVNAME(zr), __func__, frame);
            return -EINVAL;
      }

      /* Check if is buffer was queued at all */
      if (zr->v4l_buffers.buffer[frame].state == BUZ_STATE_USER) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - attempt to sync on a buffer which was not queued?\n",
                  ZR_DEVNAME(zr), __func__);
            return -EPROTO;
      }

      /* wait on this buffer to get ready */
      if (!wait_event_interruptible_timeout(zr->v4l_capq,
            (zr->v4l_buffers.buffer[frame].state != BUZ_STATE_PEND), 10*HZ))
            return -ETIME;
      if (signal_pending(current))
            return -ERESTARTSYS;

      /* buffer should now be in BUZ_STATE_DONE */
      if (zr->v4l_buffers.buffer[frame].state != BUZ_STATE_DONE)
            dprintk(2,
                  KERN_ERR "%s: %s - internal state error\n",
                  ZR_DEVNAME(zr), __func__);

      zr->v4l_buffers.buffer[frame].state = BUZ_STATE_USER;
      fh->buffers.buffer[frame] = zr->v4l_buffers.buffer[frame];

      spin_lock_irqsave(&zr->spinlock, flags);

      /* Check if streaming capture has finished */
      if (zr->v4l_pend_tail == zr->v4l_pend_head) {
            zr36057_set_memgrab(zr, 0);
            if (zr->v4l_buffers.active == ZORAN_ACTIVE) {
                  fh->buffers.active = zr->v4l_buffers.active = ZORAN_FREE;
                  zr->v4l_buffers.allocated = 0;
            }
      }

      spin_unlock_irqrestore(&zr->spinlock, flags);

      return 0;
}

/*
 *   Queue a MJPEG buffer for capture/playback
 */

static int zoran_jpg_queue_frame(struct zoran_fh *fh, int num,
                         enum zoran_codec_mode mode)
{
      struct zoran *zr = fh->zr;
      unsigned long flags;
      int res = 0;

      /* Check if buffers are allocated */
      if (!fh->buffers.allocated) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - buffers not yet allocated\n",
                  ZR_DEVNAME(zr), __func__);
            return -ENOMEM;
      }

      /* No grabbing outside the buffer range! */
      if (num >= fh->buffers.num_buffers || num < 0) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - buffer %d out of range\n",
                  ZR_DEVNAME(zr), __func__, num);
            return -EINVAL;
      }

      /* what is the codec mode right now? */
      if (zr->codec_mode == BUZ_MODE_IDLE) {
            zr->jpg_settings = fh->jpg_settings;
      } else if (zr->codec_mode != mode) {
            /* wrong codec mode active - invalid */
            dprintk(1,
                  KERN_ERR
                  "%s: %s - codec in wrong mode\n",
                  ZR_DEVNAME(zr), __func__);
            return -EINVAL;
      }

      if (fh->buffers.active == ZORAN_FREE) {
            if (zr->jpg_buffers.active == ZORAN_FREE) {
                  zr->jpg_buffers = fh->buffers;
                  fh->buffers.active = ZORAN_ACTIVE;
            } else {
                  dprintk(1,
                        KERN_ERR
                        "%s: %s - another session is already capturing\n",
                        ZR_DEVNAME(zr), __func__);
                  res = -EBUSY;
            }
      }

      if (!res && zr->codec_mode == BUZ_MODE_IDLE) {
            /* Ok load up the jpeg codec */
            zr36057_enable_jpg(zr, mode);
      }

      spin_lock_irqsave(&zr->spinlock, flags);

      if (!res) {
            switch (zr->jpg_buffers.buffer[num].state) {
            case BUZ_STATE_DONE:
                  dprintk(2,
                        KERN_WARNING
                        "%s: %s - queing frame in BUZ_STATE_DONE state!?\n",
                        ZR_DEVNAME(zr), __func__);
            case BUZ_STATE_USER:
                  /* since there is at least one unused buffer there's room for at
                   *least one more pend[] entry */
                  zr->jpg_pend[zr->jpg_que_head++ & BUZ_MASK_FRAME] = num;
                  zr->jpg_buffers.buffer[num].state = BUZ_STATE_PEND;
                  fh->buffers.buffer[num] = zr->jpg_buffers.buffer[num];
                  zoran_feed_stat_com(zr);
                  break;
            default:
            case BUZ_STATE_DMA:
            case BUZ_STATE_PEND:
                  if (zr->jpg_buffers.active == ZORAN_FREE) {
                        fh->buffers.active = ZORAN_FREE;
                        zr->jpg_buffers.allocated = 0;
                  }
                  res = -EBUSY;     /* what are you doing? */
                  break;
            }
      }

      spin_unlock_irqrestore(&zr->spinlock, flags);

      if (!res && zr->jpg_buffers.active == ZORAN_FREE)
            zr->jpg_buffers.active = fh->buffers.active;

      return res;
}

static int jpg_qbuf(struct zoran_fh *fh, int frame, enum zoran_codec_mode mode)
{
      struct zoran *zr = fh->zr;
      int res = 0;

      /* Does the user want to stop streaming? */
      if (frame < 0) {
            if (zr->codec_mode == mode) {
                  if (fh->buffers.active == ZORAN_FREE) {
                        dprintk(1,
                              KERN_ERR
                              "%s: %s(-1) - session not active\n",
                              ZR_DEVNAME(zr), __func__);
                        return -EINVAL;
                  }
                  fh->buffers.active = zr->jpg_buffers.active = ZORAN_FREE;
                  zr->jpg_buffers.allocated = 0;
                  zr36057_enable_jpg(zr, BUZ_MODE_IDLE);
                  return 0;
            } else {
                  dprintk(1,
                        KERN_ERR
                        "%s: %s - stop streaming but not in streaming mode\n",
                        ZR_DEVNAME(zr), __func__);
                  return -EINVAL;
            }
      }

      if ((res = zoran_jpg_queue_frame(fh, frame, mode)))
            return res;

      /* Start the jpeg codec when the first frame is queued  */
      if (!res && zr->jpg_que_head == 1)
            jpeg_start(zr);

      return res;
}

/*
 *   Sync on a MJPEG buffer
 */

static int jpg_sync(struct zoran_fh *fh, struct zoran_sync *bs)
{
      struct zoran *zr = fh->zr;
      unsigned long flags;
      int frame;

      if (fh->buffers.active == ZORAN_FREE) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - capture is not currently active\n",
                  ZR_DEVNAME(zr), __func__);
            return -EINVAL;
      }
      if (zr->codec_mode != BUZ_MODE_MOTION_DECOMPRESS &&
          zr->codec_mode != BUZ_MODE_MOTION_COMPRESS) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - codec not in streaming mode\n",
                  ZR_DEVNAME(zr), __func__);
            return -EINVAL;
      }
      if (!wait_event_interruptible_timeout(zr->jpg_capq,
                  (zr->jpg_que_tail != zr->jpg_dma_tail ||
                   zr->jpg_dma_tail == zr->jpg_dma_head),
                  10*HZ)) {
            int isr;

            btand(~ZR36057_JMC_Go_en, ZR36057_JMC);
            udelay(1);
            zr->codec->control(zr->codec, CODEC_G_STATUS,
                                 sizeof(isr), &isr);
            dprintk(1,
                  KERN_ERR
                  "%s: %s - timeout: codec isr=0x%02x\n",
                  ZR_DEVNAME(zr), __func__, isr);

            return -ETIME;

      }
      if (signal_pending(current))
            return -ERESTARTSYS;

      spin_lock_irqsave(&zr->spinlock, flags);

      if (zr->jpg_dma_tail != zr->jpg_dma_head)
            frame = zr->jpg_pend[zr->jpg_que_tail++ & BUZ_MASK_FRAME];
      else
            frame = zr->jpg_pend[zr->jpg_que_tail & BUZ_MASK_FRAME];

      /* buffer should now be in BUZ_STATE_DONE */
      if (zr->jpg_buffers.buffer[frame].state != BUZ_STATE_DONE)
            dprintk(2,
                  KERN_ERR "%s: %s - internal state error\n",
                  ZR_DEVNAME(zr), __func__);

      *bs = zr->jpg_buffers.buffer[frame].bs;
      bs->frame = frame;
      zr->jpg_buffers.buffer[frame].state = BUZ_STATE_USER;
      fh->buffers.buffer[frame] = zr->jpg_buffers.buffer[frame];

      spin_unlock_irqrestore(&zr->spinlock, flags);

      return 0;
}

static void zoran_open_init_session(struct zoran_fh *fh)
{
      int i;
      struct zoran *zr = fh->zr;

      /* Per default, map the V4L Buffers */
      map_mode_raw(fh);

      /* take over the card's current settings */
      fh->overlay_settings = zr->overlay_settings;
      fh->overlay_settings.is_set = 0;
      fh->overlay_settings.format = zr->overlay_settings.format;
      fh->overlay_active = ZORAN_FREE;

      /* v4l settings */
      fh->v4l_settings = zr->v4l_settings;
      /* jpg settings */
      fh->jpg_settings = zr->jpg_settings;

      /* buffers */
      memset(&fh->buffers, 0, sizeof(fh->buffers));
      for (i = 0; i < MAX_FRAME; i++) {
            fh->buffers.buffer[i].state = BUZ_STATE_USER;   /* nothing going on */
            fh->buffers.buffer[i].bs.frame = i;
      }
      fh->buffers.allocated = 0;
      fh->buffers.active = ZORAN_FREE;
}

static void zoran_close_end_session(struct zoran_fh *fh)
{
      struct zoran *zr = fh->zr;

      /* overlay */
      if (fh->overlay_active != ZORAN_FREE) {
            fh->overlay_active = zr->overlay_active = ZORAN_FREE;
            zr->v4l_overlay_active = 0;
            if (!zr->v4l_memgrab_active)
                  zr36057_overlay(zr, 0);
            zr->overlay_mask = NULL;
      }

      if (fh->map_mode == ZORAN_MAP_MODE_RAW) {
            /* v4l capture */
            if (fh->buffers.active != ZORAN_FREE) {
                  unsigned long flags;

                  spin_lock_irqsave(&zr->spinlock, flags);
                  zr36057_set_memgrab(zr, 0);
                  zr->v4l_buffers.allocated = 0;
                  zr->v4l_buffers.active = fh->buffers.active = ZORAN_FREE;
                  spin_unlock_irqrestore(&zr->spinlock, flags);
            }

            /* v4l buffers */
            if (fh->buffers.allocated)
                  v4l_fbuffer_free(fh);
      } else {
            /* jpg capture */
            if (fh->buffers.active != ZORAN_FREE) {
                  zr36057_enable_jpg(zr, BUZ_MODE_IDLE);
                  zr->jpg_buffers.allocated = 0;
                  zr->jpg_buffers.active = fh->buffers.active = ZORAN_FREE;
            }

            /* jpg buffers */
            if (fh->buffers.allocated)
                  jpg_fbuffer_free(fh);
      }
}

/*
 *   Open a zoran card. Right now the flags stuff is just playing
 */

static int zoran_open(struct file *file)
{
      struct zoran *zr = video_drvdata(file);
      struct zoran_fh *fh;
      int res, first_open = 0;

      dprintk(2, KERN_INFO "%s: %s(%s, pid=[%d]), users(-)=%d\n",
            ZR_DEVNAME(zr), __func__, current->comm, task_pid_nr(current), zr->user + 1);

      lock_kernel();

      if (zr->user >= 2048) {
            dprintk(1, KERN_ERR "%s: too many users (%d) on device\n",
                  ZR_DEVNAME(zr), zr->user);
            res = -EBUSY;
            goto fail_unlock;
      }

      /* now, create the open()-specific file_ops struct */
      fh = kzalloc(sizeof(struct zoran_fh), GFP_KERNEL);
      if (!fh) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - allocation of zoran_fh failed\n",
                  ZR_DEVNAME(zr), __func__);
            res = -ENOMEM;
            goto fail_unlock;
      }
      /* used to be BUZ_MAX_WIDTH/HEIGHT, but that gives overflows
       * on norm-change! */
      fh->overlay_mask =
          kmalloc(((768 + 31) / 32) * 576 * 4, GFP_KERNEL);
      if (!fh->overlay_mask) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - allocation of overlay_mask failed\n",
                  ZR_DEVNAME(zr), __func__);
            res = -ENOMEM;
            goto fail_fh;
      }

      if (zr->user++ == 0)
            first_open = 1;

      /*mutex_unlock(&zr->resource_lock);*/

      /* default setup - TODO: look at flags */
      if (first_open) { /* First device open */
            zr36057_restart(zr);
            zoran_open_init_params(zr);
            zoran_init_hardware(zr);

            btor(ZR36057_ICR_IntPinEn, ZR36057_ICR);
      }

      /* set file_ops stuff */
      file->private_data = fh;
      fh->zr = zr;
      zoran_open_init_session(fh);
      unlock_kernel();

      return 0;

fail_fh:
      kfree(fh);
fail_unlock:
      unlock_kernel();

      dprintk(2, KERN_INFO "%s: open failed (%d), users(-)=%d\n",
            ZR_DEVNAME(zr), res, zr->user);

      return res;
}

static int
zoran_close(struct file  *file)
{
      struct zoran_fh *fh = file->private_data;
      struct zoran *zr = fh->zr;

      dprintk(2, KERN_INFO "%s: %s(%s, pid=[%d]), users(+)=%d\n",
            ZR_DEVNAME(zr), __func__, current->comm, task_pid_nr(current), zr->user - 1);

      /* kernel locks (fs/device.c), so don't do that ourselves
       * (prevents deadlocks) */
      /*mutex_lock(&zr->resource_lock);*/

      zoran_close_end_session(fh);

      if (zr->user-- == 1) {  /* Last process */
            /* Clean up JPEG process */
            wake_up_interruptible(&zr->jpg_capq);
            zr36057_enable_jpg(zr, BUZ_MODE_IDLE);
            zr->jpg_buffers.allocated = 0;
            zr->jpg_buffers.active = ZORAN_FREE;

            /* disable interrupts */
            btand(~ZR36057_ICR_IntPinEn, ZR36057_ICR);

            if (zr36067_debug > 1)
                  print_interrupts(zr);

            /* Overlay off */
            zr->v4l_overlay_active = 0;
            zr36057_overlay(zr, 0);
            zr->overlay_mask = NULL;

            /* capture off */
            wake_up_interruptible(&zr->v4l_capq);
            zr36057_set_memgrab(zr, 0);
            zr->v4l_buffers.allocated = 0;
            zr->v4l_buffers.active = ZORAN_FREE;
            zoran_set_pci_master(zr, 0);

            if (!pass_through) {    /* Switch to color bar */
                  decoder_call(zr, video, s_stream, 0);
                  encoder_call(zr, video, s_routing, 2, 0, 0);
            }
      }

      file->private_data = NULL;
      kfree(fh->overlay_mask);
      kfree(fh);

      dprintk(4, KERN_INFO "%s: %s done\n", ZR_DEVNAME(zr), __func__);

      return 0;
}


static ssize_t
zoran_read (struct file *file,
          char        __user *data,
          size_t       count,
          loff_t      *ppos)
{
      /* we simply don't support read() (yet)... */

      return -EINVAL;
}

static ssize_t
zoran_write (struct file *file,
           const char  __user *data,
           size_t       count,
           loff_t      *ppos)
{
      /* ...and the same goes for write() */

      return -EINVAL;
}

static int setup_fbuffer(struct zoran_fh *fh,
             void                      *base,
             const struct zoran_format *fmt,
             int                        width,
             int                        height,
             int                        bytesperline)
{
      struct zoran *zr = fh->zr;

      /* (Ronald) v4l/v4l2 guidelines */
      if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
            return -EPERM;

      /* Don't allow frame buffer overlay if PCI or AGP is buggy, or on
         ALi Magik (that needs very low latency while the card needs a
         higher value always) */

      if (pci_pci_problems & (PCIPCI_FAIL | PCIAGP_FAIL | PCIPCI_ALIMAGIK))
            return -ENXIO;

      /* we need a bytesperline value, even if not given */
      if (!bytesperline)
            bytesperline = width * ((fmt->depth + 7) & ~7) / 8;

#if 0
      if (zr->overlay_active) {
            /* dzjee... stupid users... don't even bother to turn off
             * overlay before changing the memory location...
             * normally, we would return errors here. However, one of
             * the tools that does this is... xawtv! and since xawtv
             * is used by +/- 99% of the users, we'd rather be user-
             * friendly and silently do as if nothing went wrong */
            dprintk(3,
                  KERN_ERR
                  "%s: %s - forced overlay turnoff because framebuffer changed\n",
                  ZR_DEVNAME(zr), __func__);
            zr36057_overlay(zr, 0);
      }
#endif

      if (!(fmt->flags & ZORAN_FORMAT_OVERLAY)) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - no valid overlay format given\n",
                  ZR_DEVNAME(zr), __func__);
            return -EINVAL;
      }
      if (height <= 0 || width <= 0 || bytesperline <= 0) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - invalid height/width/bpl value (%d|%d|%d)\n",
                  ZR_DEVNAME(zr), __func__, width, height, bytesperline);
            return -EINVAL;
      }
      if (bytesperline & 3) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - bytesperline (%d) must be 4-byte aligned\n",
                  ZR_DEVNAME(zr), __func__, bytesperline);
            return -EINVAL;
      }

      zr->vbuf_base = (void *) ((unsigned long) base & ~3);
      zr->vbuf_height = height;
      zr->vbuf_width = width;
      zr->vbuf_depth = fmt->depth;
      zr->overlay_settings.format = fmt;
      zr->vbuf_bytesperline = bytesperline;

      /* The user should set new window parameters */
      zr->overlay_settings.is_set = 0;

      return 0;
}


static int setup_window(struct zoran_fh *fh, int x, int y, int width, int height,
      struct v4l2_clip __user *clips, int clipcount, void __user *bitmap)
{
      struct zoran *zr = fh->zr;
      struct v4l2_clip *vcp = NULL;
      int on, end;


      if (!zr->vbuf_base) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - frame buffer has to be set first\n",
                  ZR_DEVNAME(zr), __func__);
            return -EINVAL;
      }

      if (!fh->overlay_settings.format) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - no overlay format set\n",
                  ZR_DEVNAME(zr), __func__);
            return -EINVAL;
      }

      /*
       * The video front end needs 4-byte alinged line sizes, we correct that
       * silently here if necessary
       */
      if (zr->vbuf_depth == 15 || zr->vbuf_depth == 16) {
            end = (x + width) & ~1; /* round down */
            x = (x + 1) & ~1; /* round up */
            width = end - x;
      }

      if (zr->vbuf_depth == 24) {
            end = (x + width) & ~3; /* round down */
            x = (x + 3) & ~3; /* round up */
            width = end - x;
      }

      if (width > BUZ_MAX_WIDTH)
            width = BUZ_MAX_WIDTH;
      if (height > BUZ_MAX_HEIGHT)
            height = BUZ_MAX_HEIGHT;

      /* Check for vaild parameters */
      if (width < BUZ_MIN_WIDTH || height < BUZ_MIN_HEIGHT ||
          width > BUZ_MAX_WIDTH || height > BUZ_MAX_HEIGHT) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - width = %d or height = %d invalid\n",
                  ZR_DEVNAME(zr), __func__, width, height);
            return -EINVAL;
      }

      fh->overlay_settings.x = x;
      fh->overlay_settings.y = y;
      fh->overlay_settings.width = width;
      fh->overlay_settings.height = height;
      fh->overlay_settings.clipcount = clipcount;

      /*
       * If an overlay is running, we have to switch it off
       * and switch it on again in order to get the new settings in effect.
       *
       * We also want to avoid that the overlay mask is written
       * when an overlay is running.
       */

      on = zr->v4l_overlay_active && !zr->v4l_memgrab_active &&
          zr->overlay_active != ZORAN_FREE &&
          fh->overlay_active != ZORAN_FREE;
      if (on)
            zr36057_overlay(zr, 0);

      /*
       *   Write the overlay mask if clips are wanted.
       *   We prefer a bitmap.
       */
      if (bitmap) {
            /* fake value - it just means we want clips */
            fh->overlay_settings.clipcount = 1;

            if (copy_from_user(fh->overlay_mask, bitmap,
                           (width * height + 7) / 8)) {
                  return -EFAULT;
            }
      } else if (clipcount > 0) {
            /* write our own bitmap from the clips */
            vcp = vmalloc(sizeof(struct v4l2_clip) * (clipcount + 4));
            if (vcp == NULL) {
                  dprintk(1,
                        KERN_ERR
                        "%s: %s - Alloc of clip mask failed\n",
                        ZR_DEVNAME(zr), __func__);
                  return -ENOMEM;
            }
            if (copy_from_user
                (vcp, clips, sizeof(struct v4l2_clip) * clipcount)) {
                  vfree(vcp);
                  return -EFAULT;
            }
            write_overlay_mask(fh, vcp, clipcount);
            vfree(vcp);
      }

      fh->overlay_settings.is_set = 1;
      if (fh->overlay_active != ZORAN_FREE &&
          zr->overlay_active != ZORAN_FREE)
            zr->overlay_settings = fh->overlay_settings;

      if (on)
            zr36057_overlay(zr, 1);

      /* Make sure the changes come into effect */
      return wait_grab_pending(zr);
}

static int setup_overlay(struct zoran_fh *fh, int on)
{
      struct zoran *zr = fh->zr;

      /* If there is nothing to do, return immediatly */
      if ((on && fh->overlay_active != ZORAN_FREE) ||
          (!on && fh->overlay_active == ZORAN_FREE))
            return 0;

      /* check whether we're touching someone else's overlay */
      if (on && zr->overlay_active != ZORAN_FREE &&
          fh->overlay_active == ZORAN_FREE) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - overlay is already active for another session\n",
                  ZR_DEVNAME(zr), __func__);
            return -EBUSY;
      }
      if (!on && zr->overlay_active != ZORAN_FREE &&
          fh->overlay_active == ZORAN_FREE) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - you cannot cancel someone else's session\n",
                  ZR_DEVNAME(zr), __func__);
            return -EPERM;
      }

      if (on == 0) {
            zr->overlay_active = fh->overlay_active = ZORAN_FREE;
            zr->v4l_overlay_active = 0;
            /* When a grab is running, the video simply
             * won't be switched on any more */
            if (!zr->v4l_memgrab_active)
                  zr36057_overlay(zr, 0);
            zr->overlay_mask = NULL;
      } else {
            if (!zr->vbuf_base || !fh->overlay_settings.is_set) {
                  dprintk(1,
                        KERN_ERR
                        "%s: %s - buffer or window not set\n",
                        ZR_DEVNAME(zr), __func__);
                  return -EINVAL;
            }
            if (!fh->overlay_settings.format) {
                  dprintk(1,
                        KERN_ERR
                        "%s: %s - no overlay format set\n",
                        ZR_DEVNAME(zr), __func__);
                  return -EINVAL;
            }
            zr->overlay_active = fh->overlay_active = ZORAN_LOCKED;
            zr->v4l_overlay_active = 1;
            zr->overlay_mask = fh->overlay_mask;
            zr->overlay_settings = fh->overlay_settings;
            if (!zr->v4l_memgrab_active)
                  zr36057_overlay(zr, 1);
            /* When a grab is running, the video will be
             * switched on when grab is finished */
      }

      /* Make sure the changes come into effect */
      return wait_grab_pending(zr);
}

/* get the status of a buffer in the clients buffer queue */
static int zoran_v4l2_buffer_status(struct zoran_fh *fh,
                            struct v4l2_buffer *buf, int num)
{
      struct zoran *zr = fh->zr;
      unsigned long flags;

      buf->flags = V4L2_BUF_FLAG_MAPPED;

      switch (fh->map_mode) {
      case ZORAN_MAP_MODE_RAW:
            /* check range */
            if (num < 0 || num >= fh->buffers.num_buffers ||
                !fh->buffers.allocated) {
                  dprintk(1,
                        KERN_ERR
                        "%s: %s - wrong number or buffers not allocated\n",
                        ZR_DEVNAME(zr), __func__);
                  return -EINVAL;
            }

            spin_lock_irqsave(&zr->spinlock, flags);
            dprintk(3,
                  KERN_DEBUG
                  "%s: %s() - raw active=%c, buffer %d: state=%c, map=%c\n",
                  ZR_DEVNAME(zr), __func__,
                  "FAL"[fh->buffers.active], num,
                  "UPMD"[zr->v4l_buffers.buffer[num].state],
                  fh->buffers.buffer[num].map ? 'Y' : 'N');
            spin_unlock_irqrestore(&zr->spinlock, flags);

            buf->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
            buf->length = fh->buffers.buffer_size;

            /* get buffer */
            buf->bytesused = fh->buffers.buffer[num].bs.length;
            if (fh->buffers.buffer[num].state == BUZ_STATE_DONE ||
                fh->buffers.buffer[num].state == BUZ_STATE_USER) {
                  buf->sequence = fh->buffers.buffer[num].bs.seq;
                  buf->flags |= V4L2_BUF_FLAG_DONE;
                  buf->timestamp = fh->buffers.buffer[num].bs.timestamp;
            } else {
                  buf->flags |= V4L2_BUF_FLAG_QUEUED;
            }

            if (fh->v4l_settings.height <= BUZ_MAX_HEIGHT / 2)
                  buf->field = V4L2_FIELD_TOP;
            else
                  buf->field = V4L2_FIELD_INTERLACED;

            break;

      case ZORAN_MAP_MODE_JPG_REC:
      case ZORAN_MAP_MODE_JPG_PLAY:

            /* check range */
            if (num < 0 || num >= fh->buffers.num_buffers ||
                !fh->buffers.allocated) {
                  dprintk(1,
                        KERN_ERR
                        "%s: %s - wrong number or buffers not allocated\n",
                        ZR_DEVNAME(zr), __func__);
                  return -EINVAL;
            }

            buf->type = (fh->map_mode == ZORAN_MAP_MODE_JPG_REC) ?
                        V4L2_BUF_TYPE_VIDEO_CAPTURE :
                        V4L2_BUF_TYPE_VIDEO_OUTPUT;
            buf->length = fh->buffers.buffer_size;

            /* these variables are only written after frame has been captured */
            if (fh->buffers.buffer[num].state == BUZ_STATE_DONE ||
                fh->buffers.buffer[num].state == BUZ_STATE_USER) {
                  buf->sequence = fh->buffers.buffer[num].bs.seq;
                  buf->timestamp = fh->buffers.buffer[num].bs.timestamp;
                  buf->bytesused = fh->buffers.buffer[num].bs.length;
                  buf->flags |= V4L2_BUF_FLAG_DONE;
            } else {
                  buf->flags |= V4L2_BUF_FLAG_QUEUED;
            }

            /* which fields are these? */
            if (fh->jpg_settings.TmpDcm != 1)
                  buf->field = fh->jpg_settings.odd_even ?
                        V4L2_FIELD_TOP : V4L2_FIELD_BOTTOM;
            else
                  buf->field = fh->jpg_settings.odd_even ?
                        V4L2_FIELD_SEQ_TB : V4L2_FIELD_SEQ_BT;

            break;

      default:

            dprintk(5,
                  KERN_ERR
                  "%s: %s - invalid buffer type|map_mode (%d|%d)\n",
                  ZR_DEVNAME(zr), __func__, buf->type, fh->map_mode);
            return -EINVAL;
      }

      buf->memory = V4L2_MEMORY_MMAP;
      buf->index = num;
      buf->m.offset = buf->length * num;

      return 0;
}

static int
zoran_set_norm (struct zoran *zr,
            v4l2_std_id norm)
{
      int on;

      if (zr->v4l_buffers.active != ZORAN_FREE ||
          zr->jpg_buffers.active != ZORAN_FREE) {
            dprintk(1,
                  KERN_WARNING
                  "%s: %s called while in playback/capture mode\n",
                  ZR_DEVNAME(zr), __func__);
            return -EBUSY;
      }

      if (!(norm & zr->card.norms)) {
            dprintk(1,
                  KERN_ERR "%s: %s - unsupported norm %llx\n",
                  ZR_DEVNAME(zr), __func__, norm);
            return -EINVAL;
      }

      if (norm == V4L2_STD_ALL) {
            int status = 0;
            v4l2_std_id std = 0;

            decoder_call(zr, video, querystd, &std);
            decoder_call(zr, core, s_std, std);

            /* let changes come into effect */
            ssleep(2);

            decoder_call(zr, video, g_input_status, &status);
            if (status & V4L2_IN_ST_NO_SIGNAL) {
                  dprintk(1,
                        KERN_ERR
                        "%s: %s - no norm detected\n",
                        ZR_DEVNAME(zr), __func__);
                  /* reset norm */
                  decoder_call(zr, core, s_std, zr->norm);
                  return -EIO;
            }

            norm = std;
      }
      if (norm & V4L2_STD_SECAM)
            zr->timing = zr->card.tvn[2];
      else if (norm & V4L2_STD_NTSC)
            zr->timing = zr->card.tvn[1];
      else
            zr->timing = zr->card.tvn[0];

      /* We switch overlay off and on since a change in the
       * norm needs different VFE settings */
      on = zr->overlay_active && !zr->v4l_memgrab_active;
      if (on)
            zr36057_overlay(zr, 0);

      decoder_call(zr, core, s_std, norm);
      encoder_call(zr, video, s_std_output, norm);

      if (on)
            zr36057_overlay(zr, 1);

      /* Make sure the changes come into effect */
      zr->norm = norm;

      return 0;
}

static int
zoran_set_input (struct zoran *zr,
             int           input)
{
      if (input == zr->input) {
            return 0;
      }

      if (zr->v4l_buffers.active != ZORAN_FREE ||
          zr->jpg_buffers.active != ZORAN_FREE) {
            dprintk(1,
                  KERN_WARNING
                  "%s: %s called while in playback/capture mode\n",
                  ZR_DEVNAME(zr), __func__);
            return -EBUSY;
      }

      if (input < 0 || input >= zr->card.inputs) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - unnsupported input %d\n",
                  ZR_DEVNAME(zr), __func__, input);
            return -EINVAL;
      }

      zr->input = input;

      decoder_call(zr, video, s_routing,
                  zr->card.input[input].muxsel, 0, 0);

      return 0;
}

/*
 *   ioctl routine
 */

#ifdef CONFIG_VIDEO_V4L1_COMPAT
static long zoran_default(struct file *file, void *__fh, int cmd, void *arg)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      struct zoran_jpg_settings settings;

      switch (cmd) {
      case BUZIOC_G_PARAMS:
      {
            struct zoran_params *bparams = arg;

            dprintk(3, KERN_DEBUG "%s: BUZIOC_G_PARAMS\n", ZR_DEVNAME(zr));

            memset(bparams, 0, sizeof(struct zoran_params));
            bparams->major_version = MAJOR_VERSION;
            bparams->minor_version = MINOR_VERSION;

            mutex_lock(&zr->resource_lock);

            if (zr->norm & V4L2_STD_NTSC)
                  bparams->norm = VIDEO_MODE_NTSC;
            else if (zr->norm & V4L2_STD_PAL)
                  bparams->norm = VIDEO_MODE_PAL;
            else
                  bparams->norm = VIDEO_MODE_SECAM;

            bparams->input = zr->input;

            bparams->decimation = fh->jpg_settings.decimation;
            bparams->HorDcm = fh->jpg_settings.HorDcm;
            bparams->VerDcm = fh->jpg_settings.VerDcm;
            bparams->TmpDcm = fh->jpg_settings.TmpDcm;
            bparams->field_per_buff = fh->jpg_settings.field_per_buff;
            bparams->img_x = fh->jpg_settings.img_x;
            bparams->img_y = fh->jpg_settings.img_y;
            bparams->img_width = fh->jpg_settings.img_width;
            bparams->img_height = fh->jpg_settings.img_height;
            bparams->odd_even = fh->jpg_settings.odd_even;

            bparams->quality = fh->jpg_settings.jpg_comp.quality;
            bparams->APPn = fh->jpg_settings.jpg_comp.APPn;
            bparams->APP_len = fh->jpg_settings.jpg_comp.APP_len;
            memcpy(bparams->APP_data,
                   fh->jpg_settings.jpg_comp.APP_data,
                   sizeof(bparams->APP_data));
            bparams->COM_len = zr->jpg_settings.jpg_comp.COM_len;
            memcpy(bparams->COM_data,
                   fh->jpg_settings.jpg_comp.COM_data,
                   sizeof(bparams->COM_data));
            bparams->jpeg_markers =
                fh->jpg_settings.jpg_comp.jpeg_markers;

            mutex_unlock(&zr->resource_lock);

            bparams->VFIFO_FB = 0;

            return 0;
      }

      case BUZIOC_S_PARAMS:
      {
            struct zoran_params *bparams = arg;
            int res = 0;

            dprintk(3, KERN_DEBUG "%s: BUZIOC_S_PARAMS\n", ZR_DEVNAME(zr));

            settings.decimation = bparams->decimation;
            settings.HorDcm = bparams->HorDcm;
            settings.VerDcm = bparams->VerDcm;
            settings.TmpDcm = bparams->TmpDcm;
            settings.field_per_buff = bparams->field_per_buff;
            settings.img_x = bparams->img_x;
            settings.img_y = bparams->img_y;
            settings.img_width = bparams->img_width;
            settings.img_height = bparams->img_height;
            settings.odd_even = bparams->odd_even;

            settings.jpg_comp.quality = bparams->quality;
            settings.jpg_comp.APPn = bparams->APPn;
            settings.jpg_comp.APP_len = bparams->APP_len;
            memcpy(settings.jpg_comp.APP_data, bparams->APP_data,
                   sizeof(bparams->APP_data));
            settings.jpg_comp.COM_len = bparams->COM_len;
            memcpy(settings.jpg_comp.COM_data, bparams->COM_data,
                   sizeof(bparams->COM_data));
            settings.jpg_comp.jpeg_markers = bparams->jpeg_markers;

            mutex_lock(&zr->resource_lock);

            if (zr->codec_mode != BUZ_MODE_IDLE) {
                  dprintk(1,
                        KERN_ERR
                        "%s: BUZIOC_S_PARAMS called, but Buz in capture/playback mode\n",
                        ZR_DEVNAME(zr));
                  res = -EINVAL;
                  goto sparams_unlock_and_return;
            }

            /* Check the params first before overwriting our
             * nternal values */
            if (zoran_check_jpg_settings(zr, &settings, 0)) {
                  res = -EINVAL;
                  goto sparams_unlock_and_return;
            }

            fh->jpg_settings = settings;
sparams_unlock_and_return:
            mutex_unlock(&zr->resource_lock);

            return res;
      }

      case BUZIOC_REQBUFS:
      {
            struct zoran_requestbuffers *breq = arg;
            int res = 0;

            dprintk(3,
                  KERN_DEBUG
                  "%s: BUZIOC_REQBUFS - count=%lu, size=%lu\n",
                  ZR_DEVNAME(zr), breq->count, breq->size);

            /* Enforce reasonable lower and upper limits */
            if (breq->count < 4)
                  breq->count = 4;  /* Could be choosen smaller */
            if (breq->count > jpg_nbufs)
                  breq->count = jpg_nbufs;
            breq->size = PAGE_ALIGN(breq->size);
            if (breq->size < 8192)
                  breq->size = 8192;      /* Arbitrary */
            /* breq->size is limited by 1 page for the stat_com
             * tables to a Maximum of 2 MB */
            if (breq->size > jpg_bufsize)
                  breq->size = jpg_bufsize;

            mutex_lock(&zr->resource_lock);

            if (fh->buffers.allocated) {
                  dprintk(1,
                        KERN_ERR
                        "%s: BUZIOC_REQBUFS - buffers already allocated\n",
                        ZR_DEVNAME(zr));
                  res = -EBUSY;
                  goto jpgreqbuf_unlock_and_return;
            }

            /* The next mmap will map the MJPEG buffers - could
             * also be *_PLAY, but it doesn't matter here */
            map_mode_jpg(fh, 0);
            fh->buffers.num_buffers = breq->count;
            fh->buffers.buffer_size = breq->size;

            if (jpg_fbuffer_alloc(fh)) {
                  res = -ENOMEM;
                  goto jpgreqbuf_unlock_and_return;
            }

jpgreqbuf_unlock_and_return:
            mutex_unlock(&zr->resource_lock);

            return res;
      }

      case BUZIOC_QBUF_CAPT:
      {
            int *frame = arg, res;

            dprintk(3, KERN_DEBUG "%s: BUZIOC_QBUF_CAPT - frame=%d\n",
                  ZR_DEVNAME(zr), *frame);

            mutex_lock(&zr->resource_lock);
            res = jpg_qbuf(fh, *frame, BUZ_MODE_MOTION_COMPRESS);
            mutex_unlock(&zr->resource_lock);

            return res;
      }

      case BUZIOC_QBUF_PLAY:
      {
            int *frame = arg, res;

            dprintk(3, KERN_DEBUG "%s: BUZIOC_QBUF_PLAY - frame=%d\n",
                  ZR_DEVNAME(zr), *frame);

            mutex_lock(&zr->resource_lock);
            res = jpg_qbuf(fh, *frame, BUZ_MODE_MOTION_DECOMPRESS);
            mutex_unlock(&zr->resource_lock);

            return res;
      }

      case BUZIOC_SYNC:
      {
            struct zoran_sync *bsync = arg;
            int res;

            dprintk(3, KERN_DEBUG "%s: BUZIOC_SYNC\n", ZR_DEVNAME(zr));

            mutex_lock(&zr->resource_lock);

            if (fh->map_mode == ZORAN_MAP_MODE_RAW) {
                  dprintk(2, KERN_WARNING
                        "%s: %s - not in jpg capture mode\n",
                        ZR_DEVNAME(zr), __func__);
                  res = -EINVAL;
            } else {
                  res = jpg_sync(fh, bsync);
            }
            mutex_unlock(&zr->resource_lock);

            return res;
      }

      case BUZIOC_G_STATUS:
      {
            struct zoran_status *bstat = arg;
            int status = 0, res = 0;
            v4l2_std_id norm;

            dprintk(3, KERN_DEBUG "%s: BUZIOC_G_STATUS\n", ZR_DEVNAME(zr));

            if (zr->codec_mode != BUZ_MODE_IDLE) {
                  dprintk(1,
                        KERN_ERR
                        "%s: BUZIOC_G_STATUS called but Buz in capture/playback mode\n",
                        ZR_DEVNAME(zr));
                  return -EINVAL;
            }

            mutex_lock(&zr->resource_lock);

            if (zr->codec_mode != BUZ_MODE_IDLE) {
                  dprintk(1,
                        KERN_ERR
                        "%s: BUZIOC_G_STATUS called, but Buz in capture/playback mode\n",
                        ZR_DEVNAME(zr));
                  res = -EINVAL;
                  goto gstat_unlock_and_return;
            }

            decoder_call(zr, video, s_routing,
                        zr->card.input[bstat->input].muxsel, 0, 0);

            /* sleep 1 second */
            ssleep(1);

            /* Get status of video decoder */
            decoder_call(zr, video, querystd, &norm);
            decoder_call(zr, video, g_input_status, &status);

            /* restore previous input and norm */
            decoder_call(zr, video, s_routing,
                        zr->card.input[zr->input].muxsel, 0, 0);
gstat_unlock_and_return:
            mutex_unlock(&zr->resource_lock);

            if (!res) {
                  bstat->signal =
                      (status & V4L2_IN_ST_NO_SIGNAL) ? 0 : 1;
                  if (norm & V4L2_STD_NTSC)
                        bstat->norm = VIDEO_MODE_NTSC;
                  else if (norm & V4L2_STD_SECAM)
                        bstat->norm = VIDEO_MODE_SECAM;
                  else
                        bstat->norm = VIDEO_MODE_PAL;

                  bstat->color =
                      (status & V4L2_IN_ST_NO_COLOR) ? 0 : 1;
            }

            return res;
      }

      default:
            return -EINVAL;
      }
}

static int zoran_vidiocgmbuf(struct file *file, void *__fh, struct video_mbuf *vmbuf)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int i, res = 0;


      mutex_lock(&zr->resource_lock);

      if (fh->buffers.allocated) {
            dprintk(1,
                  KERN_ERR
                  "%s: VIDIOCGMBUF - buffers already allocated\n",
                  ZR_DEVNAME(zr));
            res = -EINVAL;
            goto v4l1reqbuf_unlock_and_return;
      }

      /* The next mmap will map the V4L buffers */
      map_mode_raw(fh);

      if (v4l_fbuffer_alloc(fh)) {
            res = -ENOMEM;
            goto v4l1reqbuf_unlock_and_return;
      }

      vmbuf->size = fh->buffers.num_buffers * fh->buffers.buffer_size;
      vmbuf->frames = fh->buffers.num_buffers;
      for (i = 0; i < vmbuf->frames; i++)
            vmbuf->offsets[i] = i * fh->buffers.buffer_size;

v4l1reqbuf_unlock_and_return:
      mutex_unlock(&zr->resource_lock);

      return res;
}
#endif

static int zoran_querycap(struct file *file, void *__fh, struct v4l2_capability *cap)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      memset(cap, 0, sizeof(*cap));
      strncpy(cap->card, ZR_DEVNAME(zr), sizeof(cap->card)-1);
      strncpy(cap->driver, "zoran", sizeof(cap->driver)-1);
      snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
             pci_name(zr->pci_dev));
      cap->version = KERNEL_VERSION(MAJOR_VERSION, MINOR_VERSION,
                     RELEASE_VERSION);
      cap->capabilities = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE |
                      V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_VIDEO_OVERLAY;
      return 0;
}

static int zoran_enum_fmt(struct zoran *zr, struct v4l2_fmtdesc *fmt, int flag)
{
      unsigned int num, i;

      for (num = i = 0; i < NUM_FORMATS; i++) {
            if (zoran_formats[i].flags & flag && num++ == fmt->index) {
                  strncpy(fmt->description, zoran_formats[i].name,
                        sizeof(fmt->description) - 1);
                  /* fmt struct pre-zeroed, so adding '\0' not neeed */
                  fmt->pixelformat = zoran_formats[i].fourcc;
                  if (zoran_formats[i].flags & ZORAN_FORMAT_COMPRESSED)
                        fmt->flags |= V4L2_FMT_FLAG_COMPRESSED;
                  return 0;
            }
      }
      return -EINVAL;
}

static int zoran_enum_fmt_vid_cap(struct file *file, void *__fh,
                                  struct v4l2_fmtdesc *f)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      return zoran_enum_fmt(zr, f, ZORAN_FORMAT_CAPTURE);
}

static int zoran_enum_fmt_vid_out(struct file *file, void *__fh,
                                  struct v4l2_fmtdesc *f)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      return zoran_enum_fmt(zr, f, ZORAN_FORMAT_PLAYBACK);
}

static int zoran_enum_fmt_vid_overlay(struct file *file, void *__fh,
                                  struct v4l2_fmtdesc *f)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      return zoran_enum_fmt(zr, f, ZORAN_FORMAT_OVERLAY);
}

static int zoran_g_fmt_vid_out(struct file *file, void *__fh,
                              struct v4l2_format *fmt)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      mutex_lock(&zr->resource_lock);

      fmt->fmt.pix.width = fh->jpg_settings.img_width / fh->jpg_settings.HorDcm;
      fmt->fmt.pix.height = fh->jpg_settings.img_height * 2 /
            (fh->jpg_settings.VerDcm * fh->jpg_settings.TmpDcm);
      fmt->fmt.pix.sizeimage = zoran_v4l2_calc_bufsize(&fh->jpg_settings);
      fmt->fmt.pix.pixelformat = V4L2_PIX_FMT_MJPEG;
      if (fh->jpg_settings.TmpDcm == 1)
            fmt->fmt.pix.field = (fh->jpg_settings.odd_even ?
                        V4L2_FIELD_SEQ_TB : V4L2_FIELD_SEQ_BT);
      else
            fmt->fmt.pix.field = (fh->jpg_settings.odd_even ?
                        V4L2_FIELD_TOP : V4L2_FIELD_BOTTOM);
      fmt->fmt.pix.bytesperline = 0;
      fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;

      mutex_unlock(&zr->resource_lock);
      return 0;
}

static int zoran_g_fmt_vid_cap(struct file *file, void *__fh,
                              struct v4l2_format *fmt)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      if (fh->map_mode != ZORAN_MAP_MODE_RAW)
            return zoran_g_fmt_vid_out(file, fh, fmt);

      mutex_lock(&zr->resource_lock);
      fmt->fmt.pix.width = fh->v4l_settings.width;
      fmt->fmt.pix.height = fh->v4l_settings.height;
      fmt->fmt.pix.sizeimage = fh->v4l_settings.bytesperline *
                              fh->v4l_settings.height;
      fmt->fmt.pix.pixelformat = fh->v4l_settings.format->fourcc;
      fmt->fmt.pix.colorspace = fh->v4l_settings.format->colorspace;
      fmt->fmt.pix.bytesperline = fh->v4l_settings.bytesperline;
      if (BUZ_MAX_HEIGHT < (fh->v4l_settings.height * 2))
            fmt->fmt.pix.field = V4L2_FIELD_INTERLACED;
      else
            fmt->fmt.pix.field = V4L2_FIELD_TOP;
      mutex_unlock(&zr->resource_lock);
      return 0;
}

static int zoran_g_fmt_vid_overlay(struct file *file, void *__fh,
                              struct v4l2_format *fmt)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      mutex_lock(&zr->resource_lock);

      fmt->fmt.win.w.left = fh->overlay_settings.x;
      fmt->fmt.win.w.top = fh->overlay_settings.y;
      fmt->fmt.win.w.width = fh->overlay_settings.width;
      fmt->fmt.win.w.height = fh->overlay_settings.height;
      if (fh->overlay_settings.width * 2 > BUZ_MAX_HEIGHT)
            fmt->fmt.win.field = V4L2_FIELD_INTERLACED;
      else
            fmt->fmt.win.field = V4L2_FIELD_TOP;

      mutex_unlock(&zr->resource_lock);
      return 0;
}

static int zoran_try_fmt_vid_overlay(struct file *file, void *__fh,
                              struct v4l2_format *fmt)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      mutex_lock(&zr->resource_lock);

      if (fmt->fmt.win.w.width > BUZ_MAX_WIDTH)
            fmt->fmt.win.w.width = BUZ_MAX_WIDTH;
      if (fmt->fmt.win.w.width < BUZ_MIN_WIDTH)
            fmt->fmt.win.w.width = BUZ_MIN_WIDTH;
      if (fmt->fmt.win.w.height > BUZ_MAX_HEIGHT)
            fmt->fmt.win.w.height = BUZ_MAX_HEIGHT;
      if (fmt->fmt.win.w.height < BUZ_MIN_HEIGHT)
            fmt->fmt.win.w.height = BUZ_MIN_HEIGHT;

      mutex_unlock(&zr->resource_lock);
      return 0;
}

static int zoran_try_fmt_vid_out(struct file *file, void *__fh,
                              struct v4l2_format *fmt)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      struct zoran_jpg_settings settings;
      int res = 0;

      if (fmt->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG)
            return -EINVAL;

      mutex_lock(&zr->resource_lock);
      settings = fh->jpg_settings;

      /* we actually need to set 'real' parameters now */
      if ((fmt->fmt.pix.height * 2) > BUZ_MAX_HEIGHT)
            settings.TmpDcm = 1;
      else
            settings.TmpDcm = 2;
      settings.decimation = 0;
      if (fmt->fmt.pix.height <= fh->jpg_settings.img_height / 2)
            settings.VerDcm = 2;
      else
            settings.VerDcm = 1;
      if (fmt->fmt.pix.width <= fh->jpg_settings.img_width / 4)
            settings.HorDcm = 4;
      else if (fmt->fmt.pix.width <= fh->jpg_settings.img_width / 2)
            settings.HorDcm = 2;
      else
            settings.HorDcm = 1;
      if (settings.TmpDcm == 1)
            settings.field_per_buff = 2;
      else
            settings.field_per_buff = 1;

      if (settings.HorDcm > 1) {
            settings.img_x = (BUZ_MAX_WIDTH == 720) ? 8 : 0;
            settings.img_width = (BUZ_MAX_WIDTH == 720) ? 704 : BUZ_MAX_WIDTH;
      } else {
            settings.img_x = 0;
            settings.img_width = BUZ_MAX_WIDTH;
      }

      /* check */
      res = zoran_check_jpg_settings(zr, &settings, 1);
      if (res)
            goto tryfmt_unlock_and_return;

      /* tell the user what we actually did */
      fmt->fmt.pix.width = settings.img_width / settings.HorDcm;
      fmt->fmt.pix.height = settings.img_height * 2 /
            (settings.TmpDcm * settings.VerDcm);
      if (settings.TmpDcm == 1)
            fmt->fmt.pix.field = (fh->jpg_settings.odd_even ?
                        V4L2_FIELD_SEQ_TB : V4L2_FIELD_SEQ_BT);
      else
            fmt->fmt.pix.field = (fh->jpg_settings.odd_even ?
                        V4L2_FIELD_TOP : V4L2_FIELD_BOTTOM);

      fmt->fmt.pix.sizeimage = zoran_v4l2_calc_bufsize(&settings);
      fmt->fmt.pix.bytesperline = 0;
      fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
tryfmt_unlock_and_return:
      mutex_unlock(&zr->resource_lock);
      return res;
}

static int zoran_try_fmt_vid_cap(struct file *file, void *__fh,
                              struct v4l2_format *fmt)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int bpp;
      int i;

      if (fmt->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG)
            return zoran_try_fmt_vid_out(file, fh, fmt);

      mutex_lock(&zr->resource_lock);

      for (i = 0; i < NUM_FORMATS; i++)
            if (zoran_formats[i].fourcc == fmt->fmt.pix.pixelformat)
                  break;

      if (i == NUM_FORMATS) {
            mutex_unlock(&zr->resource_lock);
            return -EINVAL;
      }

      bpp = DIV_ROUND_UP(zoran_formats[i].depth, 8);
      v4l_bound_align_image(
            &fmt->fmt.pix.width, BUZ_MIN_WIDTH, BUZ_MAX_WIDTH, bpp == 2 ? 1 : 2,
            &fmt->fmt.pix.height, BUZ_MIN_HEIGHT, BUZ_MAX_HEIGHT, 0, 0);
      mutex_unlock(&zr->resource_lock);

      return 0;
}

static int zoran_s_fmt_vid_overlay(struct file *file, void *__fh,
                              struct v4l2_format *fmt)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int res;

      dprintk(3, "x=%d, y=%d, w=%d, h=%d, cnt=%d, map=0x%p\n",
                  fmt->fmt.win.w.left, fmt->fmt.win.w.top,
                  fmt->fmt.win.w.width,
                  fmt->fmt.win.w.height,
                  fmt->fmt.win.clipcount,
                  fmt->fmt.win.bitmap);
      mutex_lock(&zr->resource_lock);
      res = setup_window(fh, fmt->fmt.win.w.left, fmt->fmt.win.w.top,
                     fmt->fmt.win.w.width, fmt->fmt.win.w.height,
                     (struct v4l2_clip __user *)fmt->fmt.win.clips,
                     fmt->fmt.win.clipcount, fmt->fmt.win.bitmap);
      mutex_unlock(&zr->resource_lock);
      return res;
}

static int zoran_s_fmt_vid_out(struct file *file, void *__fh,
                              struct v4l2_format *fmt)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      __le32 printformat = __cpu_to_le32(fmt->fmt.pix.pixelformat);
      struct zoran_jpg_settings settings;
      int res = 0;

      dprintk(3, "size=%dx%d, fmt=0x%x (%4.4s)\n",
                  fmt->fmt.pix.width, fmt->fmt.pix.height,
                  fmt->fmt.pix.pixelformat,
                  (char *) &printformat);
      if (fmt->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG)
            return -EINVAL;

      mutex_lock(&zr->resource_lock);

      if (fh->buffers.allocated) {
            dprintk(1, KERN_ERR "%s: VIDIOC_S_FMT - cannot change capture mode\n",
                  ZR_DEVNAME(zr));
            res = -EBUSY;
            goto sfmtjpg_unlock_and_return;
      }

      settings = fh->jpg_settings;

      /* we actually need to set 'real' parameters now */
      if (fmt->fmt.pix.height * 2 > BUZ_MAX_HEIGHT)
            settings.TmpDcm = 1;
      else
            settings.TmpDcm = 2;
      settings.decimation = 0;
      if (fmt->fmt.pix.height <= fh->jpg_settings.img_height / 2)
            settings.VerDcm = 2;
      else
            settings.VerDcm = 1;
      if (fmt->fmt.pix.width <= fh->jpg_settings.img_width / 4)
            settings.HorDcm = 4;
      else if (fmt->fmt.pix.width <= fh->jpg_settings.img_width / 2)
            settings.HorDcm = 2;
      else
            settings.HorDcm = 1;
      if (settings.TmpDcm == 1)
            settings.field_per_buff = 2;
      else
            settings.field_per_buff = 1;

      if (settings.HorDcm > 1) {
            settings.img_x = (BUZ_MAX_WIDTH == 720) ? 8 : 0;
            settings.img_width = (BUZ_MAX_WIDTH == 720) ? 704 : BUZ_MAX_WIDTH;
      } else {
            settings.img_x = 0;
            settings.img_width = BUZ_MAX_WIDTH;
      }

      /* check */
      res = zoran_check_jpg_settings(zr, &settings, 0);
      if (res)
            goto sfmtjpg_unlock_and_return;

      /* it's ok, so set them */
      fh->jpg_settings = settings;

      map_mode_jpg(fh, fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT);
      fh->buffers.buffer_size = zoran_v4l2_calc_bufsize(&fh->jpg_settings);

      /* tell the user what we actually did */
      fmt->fmt.pix.width = settings.img_width / settings.HorDcm;
      fmt->fmt.pix.height = settings.img_height * 2 /
            (settings.TmpDcm * settings.VerDcm);
      if (settings.TmpDcm == 1)
            fmt->fmt.pix.field = (fh->jpg_settings.odd_even ?
                        V4L2_FIELD_SEQ_TB : V4L2_FIELD_SEQ_BT);
      else
            fmt->fmt.pix.field = (fh->jpg_settings.odd_even ?
                        V4L2_FIELD_TOP : V4L2_FIELD_BOTTOM);
      fmt->fmt.pix.bytesperline = 0;
      fmt->fmt.pix.sizeimage = fh->buffers.buffer_size;
      fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;

sfmtjpg_unlock_and_return:
      mutex_unlock(&zr->resource_lock);
      return res;
}

static int zoran_s_fmt_vid_cap(struct file *file, void *__fh,
                              struct v4l2_format *fmt)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int i;
      int res = 0;

      if (fmt->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG)
            return zoran_s_fmt_vid_out(file, fh, fmt);

      for (i = 0; i < NUM_FORMATS; i++)
            if (fmt->fmt.pix.pixelformat == zoran_formats[i].fourcc)
                  break;
      if (i == NUM_FORMATS) {
            dprintk(1, KERN_ERR "%s: VIDIOC_S_FMT - unknown/unsupported format 0x%x\n",
                  ZR_DEVNAME(zr), fmt->fmt.pix.pixelformat);
            return -EINVAL;
      }

      mutex_lock(&zr->resource_lock);

      if ((fh->map_mode != ZORAN_MAP_MODE_RAW && fh->buffers.allocated) ||
          fh->buffers.active != ZORAN_FREE) {
            dprintk(1, KERN_ERR "%s: VIDIOC_S_FMT - cannot change capture mode\n",
                        ZR_DEVNAME(zr));
            res = -EBUSY;
            goto sfmtv4l_unlock_and_return;
      }
      if (fmt->fmt.pix.height > BUZ_MAX_HEIGHT)
            fmt->fmt.pix.height = BUZ_MAX_HEIGHT;
      if (fmt->fmt.pix.width > BUZ_MAX_WIDTH)
            fmt->fmt.pix.width = BUZ_MAX_WIDTH;

      map_mode_raw(fh);

      res = zoran_v4l_set_format(fh, fmt->fmt.pix.width, fmt->fmt.pix.height,
                           &zoran_formats[i]);
      if (res)
            goto sfmtv4l_unlock_and_return;

      /* tell the user the results/missing stuff */
      fmt->fmt.pix.bytesperline = fh->v4l_settings.bytesperline;
      fmt->fmt.pix.sizeimage = fh->v4l_settings.height * fh->v4l_settings.bytesperline;
      fmt->fmt.pix.colorspace = fh->v4l_settings.format->colorspace;
      if (BUZ_MAX_HEIGHT < (fh->v4l_settings.height * 2))
            fmt->fmt.pix.field = V4L2_FIELD_INTERLACED;
      else
            fmt->fmt.pix.field = V4L2_FIELD_TOP;

sfmtv4l_unlock_and_return:
      mutex_unlock(&zr->resource_lock);
      return res;
}

static int zoran_g_fbuf(struct file *file, void *__fh,
            struct v4l2_framebuffer *fb)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      memset(fb, 0, sizeof(*fb));
      mutex_lock(&zr->resource_lock);
      fb->base = zr->vbuf_base;
      fb->fmt.width = zr->vbuf_width;
      fb->fmt.height = zr->vbuf_height;
      if (zr->overlay_settings.format)
            fb->fmt.pixelformat = fh->overlay_settings.format->fourcc;
      fb->fmt.bytesperline = zr->vbuf_bytesperline;
      mutex_unlock(&zr->resource_lock);
      fb->fmt.colorspace = V4L2_COLORSPACE_SRGB;
      fb->fmt.field = V4L2_FIELD_INTERLACED;
      fb->flags = V4L2_FBUF_FLAG_OVERLAY;
      fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;

      return 0;
}

static int zoran_s_fbuf(struct file *file, void *__fh,
            struct v4l2_framebuffer *fb)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int i, res = 0;
      __le32 printformat = __cpu_to_le32(fb->fmt.pixelformat);

      for (i = 0; i < NUM_FORMATS; i++)
            if (zoran_formats[i].fourcc == fb->fmt.pixelformat)
                  break;
      if (i == NUM_FORMATS) {
            dprintk(1, KERN_ERR "%s: VIDIOC_S_FBUF - format=0x%x (%4.4s) not allowed\n",
                  ZR_DEVNAME(zr), fb->fmt.pixelformat,
                  (char *)&printformat);
            return -EINVAL;
      }

      mutex_lock(&zr->resource_lock);
      res = setup_fbuffer(fh, fb->base, &zoran_formats[i], fb->fmt.width,
                      fb->fmt.height, fb->fmt.bytesperline);
      mutex_unlock(&zr->resource_lock);

      return res;
}

static int zoran_overlay(struct file *file, void *__fh, unsigned int on)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int res;

      mutex_lock(&zr->resource_lock);
      res = setup_overlay(fh, on);
      mutex_unlock(&zr->resource_lock);

      return res;
}

static int zoran_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type);

static int zoran_reqbufs(struct file *file, void *__fh, struct v4l2_requestbuffers *req)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int res = 0;

      if (req->memory != V4L2_MEMORY_MMAP) {
            dprintk(2,
                        KERN_ERR
                        "%s: only MEMORY_MMAP capture is supported, not %d\n",
                        ZR_DEVNAME(zr), req->memory);
            return -EINVAL;
      }

      if (req->count == 0)
            return zoran_streamoff(file, fh, req->type);

      mutex_lock(&zr->resource_lock);
      if (fh->buffers.allocated) {
            dprintk(2,
                        KERN_ERR
                        "%s: VIDIOC_REQBUFS - buffers already allocated\n",
                        ZR_DEVNAME(zr));
            res = -EBUSY;
            goto v4l2reqbuf_unlock_and_return;
      }

      if (fh->map_mode == ZORAN_MAP_MODE_RAW &&
          req->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
            /* control user input */
            if (req->count < 2)
                  req->count = 2;
            if (req->count > v4l_nbufs)
                  req->count = v4l_nbufs;

            /* The next mmap will map the V4L buffers */
            map_mode_raw(fh);
            fh->buffers.num_buffers = req->count;

            if (v4l_fbuffer_alloc(fh)) {
                  res = -ENOMEM;
                  goto v4l2reqbuf_unlock_and_return;
            }
      } else if (fh->map_mode == ZORAN_MAP_MODE_JPG_REC ||
               fh->map_mode == ZORAN_MAP_MODE_JPG_PLAY) {
            /* we need to calculate size ourselves now */
            if (req->count < 4)
                  req->count = 4;
            if (req->count > jpg_nbufs)
                  req->count = jpg_nbufs;

            /* The next mmap will map the MJPEG buffers */
            map_mode_jpg(fh, req->type == V4L2_BUF_TYPE_VIDEO_OUTPUT);
            fh->buffers.num_buffers = req->count;
            fh->buffers.buffer_size = zoran_v4l2_calc_bufsize(&fh->jpg_settings);

            if (jpg_fbuffer_alloc(fh)) {
                  res = -ENOMEM;
                  goto v4l2reqbuf_unlock_and_return;
            }
      } else {
            dprintk(1,
                        KERN_ERR
                        "%s: VIDIOC_REQBUFS - unknown type %d\n",
                        ZR_DEVNAME(zr), req->type);
            res = -EINVAL;
            goto v4l2reqbuf_unlock_and_return;
      }
v4l2reqbuf_unlock_and_return:
      mutex_unlock(&zr->resource_lock);

      return res;
}

static int zoran_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int res;

      mutex_lock(&zr->resource_lock);
      res = zoran_v4l2_buffer_status(fh, buf, buf->index);
      mutex_unlock(&zr->resource_lock);

      return res;
}

static int zoran_qbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int res = 0, codec_mode, buf_type;

      mutex_lock(&zr->resource_lock);

      switch (fh->map_mode) {
      case ZORAN_MAP_MODE_RAW:
            if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
                  dprintk(1, KERN_ERR
                        "%s: VIDIOC_QBUF - invalid buf->type=%d for map_mode=%d\n",
                        ZR_DEVNAME(zr), buf->type, fh->map_mode);
                  res = -EINVAL;
                  goto qbuf_unlock_and_return;
            }

            res = zoran_v4l_queue_frame(fh, buf->index);
            if (res)
                  goto qbuf_unlock_and_return;
            if (!zr->v4l_memgrab_active && fh->buffers.active == ZORAN_LOCKED)
                  zr36057_set_memgrab(zr, 1);
            break;

      case ZORAN_MAP_MODE_JPG_REC:
      case ZORAN_MAP_MODE_JPG_PLAY:
            if (fh->map_mode == ZORAN_MAP_MODE_JPG_PLAY) {
                  buf_type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
                  codec_mode = BUZ_MODE_MOTION_DECOMPRESS;
            } else {
                  buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
                  codec_mode = BUZ_MODE_MOTION_COMPRESS;
            }

            if (buf->type != buf_type) {
                  dprintk(1, KERN_ERR
                        "%s: VIDIOC_QBUF - invalid buf->type=%d for map_mode=%d\n",
                        ZR_DEVNAME(zr), buf->type, fh->map_mode);
                  res = -EINVAL;
                  goto qbuf_unlock_and_return;
            }

            res = zoran_jpg_queue_frame(fh, buf->index, codec_mode);
            if (res != 0)
                  goto qbuf_unlock_and_return;
            if (zr->codec_mode == BUZ_MODE_IDLE &&
                fh->buffers.active == ZORAN_LOCKED)
                  zr36057_enable_jpg(zr, codec_mode);

            break;

      default:
            dprintk(1, KERN_ERR
                  "%s: VIDIOC_QBUF - unsupported type %d\n",
                  ZR_DEVNAME(zr), buf->type);
            res = -EINVAL;
            break;
      }
qbuf_unlock_and_return:
      mutex_unlock(&zr->resource_lock);

      return res;
}

static int zoran_dqbuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int res = 0, buf_type, num = -1;    /* compiler borks here (?) */

      mutex_lock(&zr->resource_lock);

      switch (fh->map_mode) {
      case ZORAN_MAP_MODE_RAW:
            if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
                  dprintk(1, KERN_ERR
                        "%s: VIDIOC_QBUF - invalid buf->type=%d for map_mode=%d\n",
                        ZR_DEVNAME(zr), buf->type, fh->map_mode);
                  res = -EINVAL;
                  goto dqbuf_unlock_and_return;
            }

            num = zr->v4l_pend[zr->v4l_sync_tail & V4L_MASK_FRAME];
            if (file->f_flags & O_NONBLOCK &&
                zr->v4l_buffers.buffer[num].state != BUZ_STATE_DONE) {
                  res = -EAGAIN;
                  goto dqbuf_unlock_and_return;
            }
            res = v4l_sync(fh, num);
            if (res)
                  goto dqbuf_unlock_and_return;
            zr->v4l_sync_tail++;
            res = zoran_v4l2_buffer_status(fh, buf, num);
            break;

      case ZORAN_MAP_MODE_JPG_REC:
      case ZORAN_MAP_MODE_JPG_PLAY:
      {
            struct zoran_sync bs;

            if (fh->map_mode == ZORAN_MAP_MODE_JPG_PLAY)
                  buf_type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
            else
                  buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;

            if (buf->type != buf_type) {
                  dprintk(1, KERN_ERR
                        "%s: VIDIOC_QBUF - invalid buf->type=%d for map_mode=%d\n",
                        ZR_DEVNAME(zr), buf->type, fh->map_mode);
                  res = -EINVAL;
                  goto dqbuf_unlock_and_return;
            }

            num = zr->jpg_pend[zr->jpg_que_tail & BUZ_MASK_FRAME];

            if (file->f_flags & O_NONBLOCK &&
                zr->jpg_buffers.buffer[num].state != BUZ_STATE_DONE) {
                  res = -EAGAIN;
                  goto dqbuf_unlock_and_return;
            }
            res = jpg_sync(fh, &bs);
            if (res)
                  goto dqbuf_unlock_and_return;
            res = zoran_v4l2_buffer_status(fh, buf, bs.frame);
            break;
      }

      default:
            dprintk(1, KERN_ERR
                  "%s: VIDIOC_DQBUF - unsupported type %d\n",
                  ZR_DEVNAME(zr), buf->type);
            res = -EINVAL;
            break;
      }
dqbuf_unlock_and_return:
      mutex_unlock(&zr->resource_lock);

      return res;
}

static int zoran_streamon(struct file *file, void *__fh, enum v4l2_buf_type type)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int res = 0;

      mutex_lock(&zr->resource_lock);

      switch (fh->map_mode) {
      case ZORAN_MAP_MODE_RAW:      /* raw capture */
            if (zr->v4l_buffers.active != ZORAN_ACTIVE ||
                fh->buffers.active != ZORAN_ACTIVE) {
                  res = -EBUSY;
                  goto strmon_unlock_and_return;
            }

            zr->v4l_buffers.active = fh->buffers.active = ZORAN_LOCKED;
            zr->v4l_settings = fh->v4l_settings;

            zr->v4l_sync_tail = zr->v4l_pend_tail;
            if (!zr->v4l_memgrab_active &&
                zr->v4l_pend_head != zr->v4l_pend_tail) {
                  zr36057_set_memgrab(zr, 1);
            }
            break;

      case ZORAN_MAP_MODE_JPG_REC:
      case ZORAN_MAP_MODE_JPG_PLAY:
            /* what is the codec mode right now? */
            if (zr->jpg_buffers.active != ZORAN_ACTIVE ||
                fh->buffers.active != ZORAN_ACTIVE) {
                  res = -EBUSY;
                  goto strmon_unlock_and_return;
            }

            zr->jpg_buffers.active = fh->buffers.active = ZORAN_LOCKED;

            if (zr->jpg_que_head != zr->jpg_que_tail) {
                  /* Start the jpeg codec when the first frame is queued  */
                  jpeg_start(zr);
            }
            break;

      default:
            dprintk(1,
                  KERN_ERR
                  "%s: VIDIOC_STREAMON - invalid map mode %d\n",
                  ZR_DEVNAME(zr), fh->map_mode);
            res = -EINVAL;
            break;
      }
strmon_unlock_and_return:
      mutex_unlock(&zr->resource_lock);

      return res;
}

static int zoran_streamoff(struct file *file, void *__fh, enum v4l2_buf_type type)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int i, res = 0;
      unsigned long flags;

      mutex_lock(&zr->resource_lock);

      switch (fh->map_mode) {
      case ZORAN_MAP_MODE_RAW:      /* raw capture */
            if (fh->buffers.active == ZORAN_FREE &&
                zr->v4l_buffers.active != ZORAN_FREE) {
                  res = -EPERM;     /* stay off other's settings! */
                  goto strmoff_unlock_and_return;
            }
            if (zr->v4l_buffers.active == ZORAN_FREE)
                  goto strmoff_unlock_and_return;

            spin_lock_irqsave(&zr->spinlock, flags);
            /* unload capture */
            if (zr->v4l_memgrab_active) {

                  zr36057_set_memgrab(zr, 0);
            }

            for (i = 0; i < fh->buffers.num_buffers; i++)
                  zr->v4l_buffers.buffer[i].state = BUZ_STATE_USER;
            fh->buffers = zr->v4l_buffers;

            zr->v4l_buffers.active = fh->buffers.active = ZORAN_FREE;

            zr->v4l_grab_seq = 0;
            zr->v4l_pend_head = zr->v4l_pend_tail = 0;
            zr->v4l_sync_tail = 0;

            spin_unlock_irqrestore(&zr->spinlock, flags);

            break;

      case ZORAN_MAP_MODE_JPG_REC:
      case ZORAN_MAP_MODE_JPG_PLAY:
            if (fh->buffers.active == ZORAN_FREE &&
                zr->jpg_buffers.active != ZORAN_FREE) {
                  res = -EPERM;     /* stay off other's settings! */
                  goto strmoff_unlock_and_return;
            }
            if (zr->jpg_buffers.active == ZORAN_FREE)
                  goto strmoff_unlock_and_return;

            res = jpg_qbuf(fh, -1,
                       (fh->map_mode == ZORAN_MAP_MODE_JPG_REC) ?
                       BUZ_MODE_MOTION_COMPRESS :
                       BUZ_MODE_MOTION_DECOMPRESS);
            if (res)
                  goto strmoff_unlock_and_return;
            break;
      default:
            dprintk(1, KERN_ERR
                  "%s: VIDIOC_STREAMOFF - invalid map mode %d\n",
                  ZR_DEVNAME(zr), fh->map_mode);
            res = -EINVAL;
            break;
      }
strmoff_unlock_and_return:
      mutex_unlock(&zr->resource_lock);

      return res;
}

static int zoran_queryctrl(struct file *file, void *__fh,
                              struct v4l2_queryctrl *ctrl)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      /* we only support hue/saturation/contrast/brightness */
      if (ctrl->id < V4L2_CID_BRIGHTNESS ||
          ctrl->id > V4L2_CID_HUE)
            return -EINVAL;

      decoder_call(zr, core, queryctrl, ctrl);

      return 0;
}

static int zoran_g_ctrl(struct file *file, void *__fh, struct v4l2_control *ctrl)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      /* we only support hue/saturation/contrast/brightness */
      if (ctrl->id < V4L2_CID_BRIGHTNESS ||
          ctrl->id > V4L2_CID_HUE)
            return -EINVAL;

      mutex_lock(&zr->resource_lock);
      decoder_call(zr, core, g_ctrl, ctrl);
      mutex_unlock(&zr->resource_lock);

      return 0;
}

static int zoran_s_ctrl(struct file *file, void *__fh, struct v4l2_control *ctrl)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      /* we only support hue/saturation/contrast/brightness */
      if (ctrl->id < V4L2_CID_BRIGHTNESS ||
          ctrl->id > V4L2_CID_HUE)
            return -EINVAL;

      mutex_lock(&zr->resource_lock);
      decoder_call(zr, core, s_ctrl, ctrl);
      mutex_unlock(&zr->resource_lock);

      return 0;
}

static int zoran_g_std(struct file *file, void *__fh, v4l2_std_id *std)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      mutex_lock(&zr->resource_lock);
      *std = zr->norm;
      mutex_unlock(&zr->resource_lock);
      return 0;
}

static int zoran_s_std(struct file *file, void *__fh, v4l2_std_id *std)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int res = 0;

      mutex_lock(&zr->resource_lock);
      res = zoran_set_norm(zr, *std);
      if (res)
            goto sstd_unlock_and_return;

      res = wait_grab_pending(zr);
sstd_unlock_and_return:
      mutex_unlock(&zr->resource_lock);
      return res;
}

static int zoran_enum_input(struct file *file, void *__fh,
                         struct v4l2_input *inp)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      if (inp->index < 0 || inp->index >= zr->card.inputs)
            return -EINVAL;
      else {
            int id = inp->index;
            memset(inp, 0, sizeof(*inp));
            inp->index = id;
      }

      strncpy(inp->name, zr->card.input[inp->index].name,
            sizeof(inp->name) - 1);
      inp->type = V4L2_INPUT_TYPE_CAMERA;
      inp->std = V4L2_STD_ALL;

      /* Get status of video decoder */
      mutex_lock(&zr->resource_lock);
      decoder_call(zr, video, g_input_status, &inp->status);
      mutex_unlock(&zr->resource_lock);
      return 0;
}

static int zoran_g_input(struct file *file, void *__fh, unsigned int *input)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;

      mutex_lock(&zr->resource_lock);
      *input = zr->input;
      mutex_unlock(&zr->resource_lock);

      return 0;
}

static int zoran_s_input(struct file *file, void *__fh, unsigned int input)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int res;

      mutex_lock(&zr->resource_lock);
      res = zoran_set_input(zr, input);
      if (res)
            goto sinput_unlock_and_return;

      /* Make sure the changes come into effect */
      res = wait_grab_pending(zr);
sinput_unlock_and_return:
      mutex_unlock(&zr->resource_lock);
      return res;
}

static int zoran_enum_output(struct file *file, void *__fh,
                          struct v4l2_output *outp)
{
      if (outp->index != 0)
            return -EINVAL;

      memset(outp, 0, sizeof(*outp));
      outp->index = 0;
      outp->type = V4L2_OUTPUT_TYPE_ANALOGVGAOVERLAY;
      strncpy(outp->name, "Autodetect", sizeof(outp->name)-1);

      return 0;
}

static int zoran_g_output(struct file *file, void *__fh, unsigned int *output)
{
      *output = 0;

      return 0;
}

static int zoran_s_output(struct file *file, void *__fh, unsigned int output)
{
      if (output != 0)
            return -EINVAL;

      return 0;
}

/* cropping (sub-frame capture) */
static int zoran_cropcap(struct file *file, void *__fh,
                              struct v4l2_cropcap *cropcap)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int type = cropcap->type, res = 0;

      memset(cropcap, 0, sizeof(*cropcap));
      cropcap->type = type;

      mutex_lock(&zr->resource_lock);

      if (cropcap->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
          (cropcap->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
           fh->map_mode == ZORAN_MAP_MODE_RAW)) {
            dprintk(1, KERN_ERR
                  "%s: VIDIOC_CROPCAP - subcapture only supported for compressed capture\n",
                  ZR_DEVNAME(zr));
            res = -EINVAL;
            goto cropcap_unlock_and_return;
      }

      cropcap->bounds.top = cropcap->bounds.left = 0;
      cropcap->bounds.width = BUZ_MAX_WIDTH;
      cropcap->bounds.height = BUZ_MAX_HEIGHT;
      cropcap->defrect.top = cropcap->defrect.left = 0;
      cropcap->defrect.width = BUZ_MIN_WIDTH;
      cropcap->defrect.height = BUZ_MIN_HEIGHT;
cropcap_unlock_and_return:
      mutex_unlock(&zr->resource_lock);
      return res;
}

static int zoran_g_crop(struct file *file, void *__fh, struct v4l2_crop *crop)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int type = crop->type, res = 0;

      memset(crop, 0, sizeof(*crop));
      crop->type = type;

      mutex_lock(&zr->resource_lock);

      if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
          (crop->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
           fh->map_mode == ZORAN_MAP_MODE_RAW)) {
            dprintk(1,
                  KERN_ERR
                  "%s: VIDIOC_G_CROP - subcapture only supported for compressed capture\n",
                  ZR_DEVNAME(zr));
            res = -EINVAL;
            goto gcrop_unlock_and_return;
      }

      crop->c.top = fh->jpg_settings.img_y;
      crop->c.left = fh->jpg_settings.img_x;
      crop->c.width = fh->jpg_settings.img_width;
      crop->c.height = fh->jpg_settings.img_height;

gcrop_unlock_and_return:
      mutex_unlock(&zr->resource_lock);

      return res;
}

static int zoran_s_crop(struct file *file, void *__fh, struct v4l2_crop *crop)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int res = 0;
      struct zoran_jpg_settings settings;

      settings = fh->jpg_settings;

      mutex_lock(&zr->resource_lock);

      if (fh->buffers.allocated) {
            dprintk(1, KERN_ERR
                  "%s: VIDIOC_S_CROP - cannot change settings while active\n",
                  ZR_DEVNAME(zr));
            res = -EBUSY;
            goto scrop_unlock_and_return;
      }

      if (crop->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
          (crop->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
           fh->map_mode == ZORAN_MAP_MODE_RAW)) {
            dprintk(1, KERN_ERR
                  "%s: VIDIOC_G_CROP - subcapture only supported for compressed capture\n",
                  ZR_DEVNAME(zr));
            res = -EINVAL;
            goto scrop_unlock_and_return;
      }

      /* move into a form that we understand */
      settings.img_x = crop->c.left;
      settings.img_y = crop->c.top;
      settings.img_width = crop->c.width;
      settings.img_height = crop->c.height;

      /* check validity */
      res = zoran_check_jpg_settings(zr, &settings, 0);
      if (res)
            goto scrop_unlock_and_return;

      /* accept */
      fh->jpg_settings = settings;

scrop_unlock_and_return:
      mutex_unlock(&zr->resource_lock);
      return res;
}

static int zoran_g_jpegcomp(struct file *file, void *__fh,
                              struct v4l2_jpegcompression *params)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      memset(params, 0, sizeof(*params));

      mutex_lock(&zr->resource_lock);

      params->quality = fh->jpg_settings.jpg_comp.quality;
      params->APPn = fh->jpg_settings.jpg_comp.APPn;
      memcpy(params->APP_data,
             fh->jpg_settings.jpg_comp.APP_data,
             fh->jpg_settings.jpg_comp.APP_len);
      params->APP_len = fh->jpg_settings.jpg_comp.APP_len;
      memcpy(params->COM_data,
             fh->jpg_settings.jpg_comp.COM_data,
             fh->jpg_settings.jpg_comp.COM_len);
      params->COM_len = fh->jpg_settings.jpg_comp.COM_len;
      params->jpeg_markers =
          fh->jpg_settings.jpg_comp.jpeg_markers;

      mutex_unlock(&zr->resource_lock);

      return 0;
}

static int zoran_s_jpegcomp(struct file *file, void *__fh,
                              struct v4l2_jpegcompression *params)
{
      struct zoran_fh *fh = __fh;
      struct zoran *zr = fh->zr;
      int res = 0;
      struct zoran_jpg_settings settings;

      settings = fh->jpg_settings;

      settings.jpg_comp = *params;

      mutex_lock(&zr->resource_lock);

      if (fh->buffers.active != ZORAN_FREE) {
            dprintk(1, KERN_WARNING
                  "%s: VIDIOC_S_JPEGCOMP called while in playback/capture mode\n",
                  ZR_DEVNAME(zr));
            res = -EBUSY;
            goto sjpegc_unlock_and_return;
      }

      res = zoran_check_jpg_settings(zr, &settings, 0);
      if (res)
            goto sjpegc_unlock_and_return;
      if (!fh->buffers.allocated)
            fh->buffers.buffer_size =
                  zoran_v4l2_calc_bufsize(&fh->jpg_settings);
      fh->jpg_settings.jpg_comp = *params = settings.jpg_comp;
sjpegc_unlock_and_return:
      mutex_unlock(&zr->resource_lock);

      return res;
}

static unsigned int
zoran_poll (struct file *file,
          poll_table  *wait)
{
      struct zoran_fh *fh = file->private_data;
      struct zoran *zr = fh->zr;
      int res = 0, frame;
      unsigned long flags;

      /* we should check whether buffers are ready to be synced on
       * (w/o waits - O_NONBLOCK) here
       * if ready for read (sync), return POLLIN|POLLRDNORM,
       * if ready for write (sync), return POLLOUT|POLLWRNORM,
       * if error, return POLLERR,
       * if no buffers queued or so, return POLLNVAL
       */

      mutex_lock(&zr->resource_lock);

      switch (fh->map_mode) {
      case ZORAN_MAP_MODE_RAW:
            poll_wait(file, &zr->v4l_capq, wait);
            frame = zr->v4l_pend[zr->v4l_sync_tail & V4L_MASK_FRAME];

            spin_lock_irqsave(&zr->spinlock, flags);
            dprintk(3,
                  KERN_DEBUG
                  "%s: %s() raw - active=%c, sync_tail=%lu/%c, pend_tail=%lu, pend_head=%lu\n",
                  ZR_DEVNAME(zr), __func__,
                  "FAL"[fh->buffers.active], zr->v4l_sync_tail,
                  "UPMD"[zr->v4l_buffers.buffer[frame].state],
                  zr->v4l_pend_tail, zr->v4l_pend_head);
            /* Process is the one capturing? */
            if (fh->buffers.active != ZORAN_FREE &&
                /* Buffer ready to DQBUF? */
                zr->v4l_buffers.buffer[frame].state == BUZ_STATE_DONE)
                  res = POLLIN | POLLRDNORM;
            spin_unlock_irqrestore(&zr->spinlock, flags);

            break;

      case ZORAN_MAP_MODE_JPG_REC:
      case ZORAN_MAP_MODE_JPG_PLAY:
            poll_wait(file, &zr->jpg_capq, wait);
            frame = zr->jpg_pend[zr->jpg_que_tail & BUZ_MASK_FRAME];

            spin_lock_irqsave(&zr->spinlock, flags);
            dprintk(3,
                  KERN_DEBUG
                  "%s: %s() jpg - active=%c, que_tail=%lu/%c, que_head=%lu, dma=%lu/%lu\n",
                  ZR_DEVNAME(zr), __func__,
                  "FAL"[fh->buffers.active], zr->jpg_que_tail,
                  "UPMD"[zr->jpg_buffers.buffer[frame].state],
                  zr->jpg_que_head, zr->jpg_dma_tail, zr->jpg_dma_head);
            if (fh->buffers.active != ZORAN_FREE &&
                zr->jpg_buffers.buffer[frame].state == BUZ_STATE_DONE) {
                  if (fh->map_mode == ZORAN_MAP_MODE_JPG_REC)
                        res = POLLIN | POLLRDNORM;
                  else
                        res = POLLOUT | POLLWRNORM;
            }
            spin_unlock_irqrestore(&zr->spinlock, flags);

            break;

      default:
            dprintk(1,
                  KERN_ERR
                  "%s: %s - internal error, unknown map_mode=%d\n",
                  ZR_DEVNAME(zr), __func__, fh->map_mode);
            res = POLLNVAL;
      }

      mutex_unlock(&zr->resource_lock);

      return res;
}


/*
 * This maps the buffers to user space.
 *
 * Depending on the state of fh->map_mode
 * the V4L or the MJPEG buffers are mapped
 * per buffer or all together
 *
 * Note that we need to connect to some
 * unmap signal event to unmap the de-allocate
 * the buffer accordingly (zoran_vm_close())
 */

static void
zoran_vm_open (struct vm_area_struct *vma)
{
      struct zoran_mapping *map = vma->vm_private_data;

      map->count++;
}

static void
zoran_vm_close (struct vm_area_struct *vma)
{
      struct zoran_mapping *map = vma->vm_private_data;
      struct zoran_fh *fh = map->file->private_data;
      struct zoran *zr = fh->zr;
      int i;

      if (--map->count > 0)
            return;

      dprintk(3, KERN_INFO "%s: %s - munmap(%s)\n", ZR_DEVNAME(zr),
            __func__, mode_name(fh->map_mode));

      for (i = 0; i < fh->buffers.num_buffers; i++) {
            if (fh->buffers.buffer[i].map == map)
                  fh->buffers.buffer[i].map = NULL;
      }
      kfree(map);

      /* Any buffers still mapped? */
      for (i = 0; i < fh->buffers.num_buffers; i++)
            if (fh->buffers.buffer[i].map)
                  return;

      dprintk(3, KERN_INFO "%s: %s - free %s buffers\n", ZR_DEVNAME(zr),
            __func__, mode_name(fh->map_mode));

      mutex_lock(&zr->resource_lock);

      if (fh->map_mode == ZORAN_MAP_MODE_RAW) {
            if (fh->buffers.active != ZORAN_FREE) {
                  unsigned long flags;

                  spin_lock_irqsave(&zr->spinlock, flags);
                  zr36057_set_memgrab(zr, 0);
                  zr->v4l_buffers.allocated = 0;
                  zr->v4l_buffers.active = fh->buffers.active = ZORAN_FREE;
                  spin_unlock_irqrestore(&zr->spinlock, flags);
            }
            v4l_fbuffer_free(fh);
      } else {
            if (fh->buffers.active != ZORAN_FREE) {
                  jpg_qbuf(fh, -1, zr->codec_mode);
                  zr->jpg_buffers.allocated = 0;
                  zr->jpg_buffers.active = fh->buffers.active = ZORAN_FREE;
            }
            jpg_fbuffer_free(fh);
      }

      mutex_unlock(&zr->resource_lock);
}

static struct vm_operations_struct zoran_vm_ops = {
      .open = zoran_vm_open,
      .close = zoran_vm_close,
};

static int
zoran_mmap (struct file           *file,
          struct vm_area_struct *vma)
{
      struct zoran_fh *fh = file->private_data;
      struct zoran *zr = fh->zr;
      unsigned long size = (vma->vm_end - vma->vm_start);
      unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
      int i, j;
      unsigned long page, start = vma->vm_start, todo, pos, fraglen;
      int first, last;
      struct zoran_mapping *map;
      int res = 0;

      dprintk(3,
            KERN_INFO "%s: %s(%s) of 0x%08lx-0x%08lx (size=%lu)\n",
            ZR_DEVNAME(zr), __func__,
            mode_name(fh->map_mode), vma->vm_start, vma->vm_end, size);

      if (!(vma->vm_flags & VM_SHARED) || !(vma->vm_flags & VM_READ) ||
          !(vma->vm_flags & VM_WRITE)) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s - no MAP_SHARED/PROT_{READ,WRITE} given\n",
                  ZR_DEVNAME(zr), __func__);
            return -EINVAL;
      }

      mutex_lock(&zr->resource_lock);

      if (!fh->buffers.allocated) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s(%s) - buffers not yet allocated\n",
                  ZR_DEVNAME(zr), __func__, mode_name(fh->map_mode));
            res = -ENOMEM;
            goto mmap_unlock_and_return;
      }

      first = offset / fh->buffers.buffer_size;
      last = first - 1 + size / fh->buffers.buffer_size;
      if (offset % fh->buffers.buffer_size != 0 ||
          size % fh->buffers.buffer_size != 0 || first < 0 ||
          last < 0 || first >= fh->buffers.num_buffers ||
          last >= fh->buffers.buffer_size) {
            dprintk(1,
                  KERN_ERR
                  "%s: %s(%s) - offset=%lu or size=%lu invalid for bufsize=%d and numbufs=%d\n",
                  ZR_DEVNAME(zr), __func__, mode_name(fh->map_mode), offset, size,
                  fh->buffers.buffer_size,
                  fh->buffers.num_buffers);
            res = -EINVAL;
            goto mmap_unlock_and_return;
      }

      /* Check if any buffers are already mapped */
      for (i = first; i <= last; i++) {
            if (fh->buffers.buffer[i].map) {
                  dprintk(1,
                        KERN_ERR
                        "%s: %s(%s) - buffer %d already mapped\n",
                        ZR_DEVNAME(zr), __func__, mode_name(fh->map_mode), i);
                  res = -EBUSY;
                  goto mmap_unlock_and_return;
            }
      }

      /* map these buffers */
      map = kmalloc(sizeof(struct zoran_mapping), GFP_KERNEL);
      if (!map) {
            res = -ENOMEM;
            goto mmap_unlock_and_return;
      }
      map->file = file;
      map->count = 1;

      vma->vm_ops = &zoran_vm_ops;
      vma->vm_flags |= VM_DONTEXPAND;
      vma->vm_private_data = map;

      if (fh->map_mode == ZORAN_MAP_MODE_RAW) {
            for (i = first; i <= last; i++) {
                  todo = size;
                  if (todo > fh->buffers.buffer_size)
                        todo = fh->buffers.buffer_size;
                  page = fh->buffers.buffer[i].v4l.fbuffer_phys;
                  if (remap_pfn_range(vma, start, page >> PAGE_SHIFT,
                                          todo, PAGE_SHARED)) {
                        dprintk(1,
                              KERN_ERR
                              "%s: %s(V4L) - remap_pfn_range failed\n",
                              ZR_DEVNAME(zr), __func__);
                        res = -EAGAIN;
                        goto mmap_unlock_and_return;
                  }
                  size -= todo;
                  start += todo;
                  fh->buffers.buffer[i].map = map;
                  if (size == 0)
                        break;
            }
      } else {
            for (i = first; i <= last; i++) {
                  for (j = 0;
                       j < fh->buffers.buffer_size / PAGE_SIZE;
                       j++) {
                        fraglen =
                            (le32_to_cpu(fh->buffers.buffer[i].jpg.
                             frag_tab[2 * j + 1]) & ~1) << 1;
                        todo = size;
                        if (todo > fraglen)
                              todo = fraglen;
                        pos =
                            le32_to_cpu(fh->buffers.
                            buffer[i].jpg.frag_tab[2 * j]);
                        /* should just be pos on i386 */
                        page = virt_to_phys(bus_to_virt(pos))
                                                >> PAGE_SHIFT;
                        if (remap_pfn_range(vma, start, page,
                                          todo, PAGE_SHARED)) {
                              dprintk(1,
                                    KERN_ERR
                                    "%s: %s(V4L) - remap_pfn_range failed\n",
                                    ZR_DEVNAME(zr), __func__);
                              res = -EAGAIN;
                              goto mmap_unlock_and_return;
                        }
                        size -= todo;
                        start += todo;
                        if (size == 0)
                              break;
                        if (le32_to_cpu(fh->buffers.buffer[i].jpg.
                            frag_tab[2 * j + 1]) & 1)
                              break;      /* was last fragment */
                  }
                  fh->buffers.buffer[i].map = map;
                  if (size == 0)
                        break;

            }
      }

mmap_unlock_and_return:
      mutex_unlock(&zr->resource_lock);

      return 0;
}

static const struct v4l2_ioctl_ops zoran_ioctl_ops = {
      .vidioc_querycap                  = zoran_querycap,
      .vidioc_cropcap                   = zoran_cropcap,
      .vidioc_s_crop                    = zoran_s_crop,
      .vidioc_g_crop                    = zoran_g_crop,
      .vidioc_enum_input                = zoran_enum_input,
      .vidioc_g_input                   = zoran_g_input,
      .vidioc_s_input                   = zoran_s_input,
      .vidioc_enum_output               = zoran_enum_output,
      .vidioc_g_output                  = zoran_g_output,
      .vidioc_s_output                  = zoran_s_output,
      .vidioc_g_fbuf                    = zoran_g_fbuf,
      .vidioc_s_fbuf                    = zoran_s_fbuf,
      .vidioc_g_std                     = zoran_g_std,
      .vidioc_s_std                     = zoran_s_std,
      .vidioc_g_jpegcomp                = zoran_g_jpegcomp,
      .vidioc_s_jpegcomp                = zoran_s_jpegcomp,
      .vidioc_overlay                   = zoran_overlay,
      .vidioc_reqbufs                   = zoran_reqbufs,
      .vidioc_querybuf            = zoran_querybuf,
      .vidioc_qbuf                      = zoran_qbuf,
      .vidioc_dqbuf                     = zoran_dqbuf,
      .vidioc_streamon            = zoran_streamon,
      .vidioc_streamoff           = zoran_streamoff,
      .vidioc_enum_fmt_vid_cap          = zoran_enum_fmt_vid_cap,
      .vidioc_enum_fmt_vid_out          = zoran_enum_fmt_vid_out,
      .vidioc_enum_fmt_vid_overlay      = zoran_enum_fmt_vid_overlay,
      .vidioc_g_fmt_vid_cap             = zoran_g_fmt_vid_cap,
      .vidioc_g_fmt_vid_out               = zoran_g_fmt_vid_out,
      .vidioc_g_fmt_vid_overlay           = zoran_g_fmt_vid_overlay,
      .vidioc_s_fmt_vid_cap             = zoran_s_fmt_vid_cap,
      .vidioc_s_fmt_vid_out               = zoran_s_fmt_vid_out,
      .vidioc_s_fmt_vid_overlay           = zoran_s_fmt_vid_overlay,
      .vidioc_try_fmt_vid_cap           = zoran_try_fmt_vid_cap,
      .vidioc_try_fmt_vid_out           = zoran_try_fmt_vid_out,
      .vidioc_try_fmt_vid_overlay       = zoran_try_fmt_vid_overlay,
      .vidioc_queryctrl                 = zoran_queryctrl,
      .vidioc_s_ctrl                    = zoran_s_ctrl,
      .vidioc_g_ctrl                    = zoran_g_ctrl,
#ifdef CONFIG_VIDEO_V4L1_COMPAT
      .vidioc_default             = zoran_default,
      .vidiocgmbuf                      = zoran_vidiocgmbuf,
#endif
};

static const struct v4l2_file_operations zoran_fops = {
      .owner = THIS_MODULE,
      .open = zoran_open,
      .release = zoran_close,
      .ioctl = video_ioctl2,
      .read = zoran_read,
      .write = zoran_write,
      .mmap = zoran_mmap,
      .poll = zoran_poll,
};

struct video_device zoran_template __devinitdata = {
      .name = ZORAN_NAME,
      .fops = &zoran_fops,
      .ioctl_ops = &zoran_ioctl_ops,
      .release = &zoran_vdev_release,
      .tvnorms = V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM,
      .minor = -1
};


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