/*
 * 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/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>
#define     MAP_NR(x)       virt_to_page(x)
#define     ZORAN_VID_TYPE  ( \
                                VID_TYPE_CAPTURE | \
                                VID_TYPE_OVERLAY | \
                                VID_TYPE_CLIPPING | \
                                VID_TYPE_FRAMERAM | \
                                VID_TYPE_SCALES | \
                                VID_TYPE_MJPEG_DECODER | \
                                VID_TYPE_MJPEG_ENCODER \
                             )

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

        /* we declare some card type definitions here, they mean
         * the same as the v4l1 ZORAN_VID_TYPE above, except it's v4l2 */
#define ZORAN_V4L2_VID_FLAGS ( \
                                V4L2_CAP_STREAMING |\
                                V4L2_CAP_VIDEO_CAPTURE |\
                                V4L2_CAP_VIDEO_OUTPUT |\
                                V4L2_CAP_VIDEO_OVERLAY \
                              )


#if defined(CONFIG_VIDEO_V4L1_COMPAT)
#define ZFMT(pal, fcc, cs) \
        .palette = (pal), .fourcc = (fcc), .colorspace = (cs)
#else
#define ZFMT(pal, fcc, cs) \
        .fourcc = (fcc), .colorspace = (cs)
#endif

const struct zoran_format zoran_formats[] = {
        {
                .name = "15-bit RGB LE",
                ZFMT(VIDEO_PALETTE_RGB555,
                     V4L2_PIX_FMT_RGB555, 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",
                ZFMT(-1,
                     V4L2_PIX_FMT_RGB555X, V4L2_COLORSPACE_SRGB),
                .depth = 15,
                .flags = ZORAN_FORMAT_CAPTURE |
                         ZORAN_FORMAT_OVERLAY,
                .vfespfr = ZR36057_VFESPFR_RGB555|ZR36057_VFESPFR_ErrDif,
        }, {
                .name = "16-bit RGB LE",
                ZFMT(VIDEO_PALETTE_RGB565,
                     V4L2_PIX_FMT_RGB565, 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",
                ZFMT(-1,
                     V4L2_PIX_FMT_RGB565X, V4L2_COLORSPACE_SRGB),
                .depth = 16,
                .flags = ZORAN_FORMAT_CAPTURE |
                         ZORAN_FORMAT_OVERLAY,
                .vfespfr = ZR36057_VFESPFR_RGB565|ZR36057_VFESPFR_ErrDif,
        }, {
                .name = "24-bit RGB",
                ZFMT(VIDEO_PALETTE_RGB24,
                     V4L2_PIX_FMT_BGR24, V4L2_COLORSPACE_SRGB),
                .depth = 24,
                .flags = ZORAN_FORMAT_CAPTURE |
                         ZORAN_FORMAT_OVERLAY,
                .vfespfr = ZR36057_VFESPFR_RGB888|ZR36057_VFESPFR_Pack24,
        }, {
                .name = "32-bit RGB LE",
                ZFMT(VIDEO_PALETTE_RGB32,
                     V4L2_PIX_FMT_BGR32, V4L2_COLORSPACE_SRGB),
                .depth = 32,
                .flags = ZORAN_FORMAT_CAPTURE |
                         ZORAN_FORMAT_OVERLAY,
                .vfespfr = ZR36057_VFESPFR_RGB888|ZR36057_VFESPFR_LittleEndian,
        }, {
                .name = "32-bit RGB BE",
                ZFMT(-1,
                     V4L2_PIX_FMT_RGB32, V4L2_COLORSPACE_SRGB),
                .depth = 32,
                .flags = ZORAN_FORMAT_CAPTURE |
                         ZORAN_FORMAT_OVERLAY,
                .vfespfr = ZR36057_VFESPFR_RGB888,
        }, {
                .name = "4:2:2, packed, YUYV",
                ZFMT(VIDEO_PALETTE_YUV422,
                     V4L2_PIX_FMT_YUYV, V4L2_COLORSPACE_SMPTE170M),
                .depth = 16,
                .flags = ZORAN_FORMAT_CAPTURE |
                         ZORAN_FORMAT_OVERLAY,
                .vfespfr = ZR36057_VFESPFR_YUV422,
        }, {
                .name = "4:2:2, packed, UYVY",
                ZFMT(VIDEO_PALETTE_UYVY,
                     V4L2_PIX_FMT_UYVY, V4L2_COLORSPACE_SMPTE170M),
                .depth = 16,
                .flags = ZORAN_FORMAT_CAPTURE |
                         ZORAN_FORMAT_OVERLAY,
                .vfespfr = ZR36057_VFESPFR_YUV422|ZR36057_VFESPFR_LittleEndian,
        }, {
                .name = "Hardware-encoded Motion-JPEG",
                ZFMT(-1,
                     V4L2_PIX_FMT_MJPEG, V4L2_COLORSPACE_SMPTE170M),
                .depth = 0,
                .flags = ZORAN_FORMAT_CAPTURE |
                         ZORAN_FORMAT_PLAYBACK |
                         ZORAN_FORMAT_COMPRESSED,
        }
};
#define NUM_FORMATS ARRAY_SIZE(zoran_formats)

// RJ: Test only - want to test BUZ_USE_HIMEM even when CONFIG_BIGPHYS_AREA is defined


extern int v4l_nbufs;
extern int v4l_bufsize;
extern int jpg_nbufs;
extern int jpg_bufsize;
extern int pass_through;

static int lock_norm;   /* 0 = default 1 = Don't change TV standard (norm) */
module_param(lock_norm, int, 0644);
MODULE_PARM_DESC(lock_norm, "Prevent norm changes (1 = ignore, >1 = fail)");

        /* 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 file *file);
static void jpg_fbuffer_free(struct file *file);

/*
 *   Allocate the V4L grab buffers
 *
 *   These have to be pysically contiguous.
 *   If v4l_bufsize <= MAX_KMALLOC_MEM we use kmalloc
 *   else we try to allocate them with bigphysarea_alloc_pages
 *   if the bigphysarea patch is present in the kernel,
 *   else we try to use high memory (if the user has bootet
 *   Linux with the necessary memory left over).
 */

static unsigned long
get_high_mem (unsigned long size)
{
/*
 * Check if there is usable memory at the end of Linux memory
 * of at least size. Return the physical address of this memory,
 * return 0 on failure.
 *
 * The idea is from Alexandro Rubini's book "Linux device drivers".
 * The driver from him which is downloadable from O'Reilly's
 * web site misses the "virt_to_phys(high_memory)" part
 * (and therefore doesn't work at all - at least with 2.2.x kernels).
 *
 * It should be unnecessary to mention that THIS IS DANGEROUS,
 * if more than one driver at a time has the idea to use this memory!!!!
 */

        volatile unsigned char __iomem *mem;
        unsigned char c;
        unsigned long hi_mem_ph;
        unsigned long i;

        /* Map the high memory to user space */

        hi_mem_ph = virt_to_phys(high_memory);

        mem = ioremap(hi_mem_ph, size);
        if (!mem) {
                dprintk(1,
                        KERN_ERR "%s: get_high_mem() - ioremap failed\n",
                        ZORAN_NAME);
                return 0;
        }

        for (i = 0; i < size; i++) {
                /* Check if it is memory */
                c = i & 0xff;
                writeb(c, mem + i);
                if (readb(mem + i) != c)
                        break;
                c = 255 - c;
                writeb(c, mem + i);
                if (readb(mem + i) != c)
                        break;
                writeb(0, mem + i);     /* zero out memory */

                /* give the kernel air to breath */
                if ((i & 0x3ffff) == 0x3ffff)
                        schedule();
        }

        iounmap(mem);

        if (i != size) {
                dprintk(1,
                        KERN_ERR
                        "%s: get_high_mem() - requested %lu, avail %lu\n",
                        ZORAN_NAME, size, i);
                return 0;
        }

        return hi_mem_ph;
}

static int
v4l_fbuffer_alloc (struct file *file)
{
        struct zoran_fh *fh = file->private_data;
        struct zoran *zr = fh->zr;
        int i, off;
        unsigned char *mem;
        unsigned long pmem = 0;

        /* we might have old buffers lying around... */
        if (fh->v4l_buffers.ready_to_be_freed) {
                v4l_fbuffer_free(file);
        }

        for (i = 0; i < fh->v4l_buffers.num_buffers; i++) {
                if (fh->v4l_buffers.buffer[i].fbuffer)
                        dprintk(2,
                                KERN_WARNING
                                "%s: v4l_fbuffer_alloc() - buffer %d allready allocated!?\n",
                                ZR_DEVNAME(zr), i);

                //udelay(20);
                if (fh->v4l_buffers.buffer_size <= MAX_KMALLOC_MEM) {
                        /* Use kmalloc */

                        mem = kmalloc(fh->v4l_buffers.buffer_size, GFP_KERNEL);
                        if (!mem) {
                                dprintk(1,
                                        KERN_ERR
                                        "%s: v4l_fbuffer_alloc() - kmalloc for V4L buf %d failed\n",
                                        ZR_DEVNAME(zr), i);
                                v4l_fbuffer_free(file);
                                return -ENOBUFS;
                        }
                        fh->v4l_buffers.buffer[i].fbuffer = mem;
                        fh->v4l_buffers.buffer[i].fbuffer_phys =
                            virt_to_phys(mem);
                        fh->v4l_buffers.buffer[i].fbuffer_bus =
                            virt_to_bus(mem);
                        for (off = 0; off < fh->v4l_buffers.buffer_size;
                             off += PAGE_SIZE)
                                SetPageReserved(MAP_NR(mem + off));
                        dprintk(4,
                                KERN_INFO
                                "%s: v4l_fbuffer_alloc() - V4L frame %d mem 0x%lx (bus: 0x%lx)\n",
                                ZR_DEVNAME(zr), i, (unsigned long) mem,
                                virt_to_bus(mem));
                } else {

                        /* Use high memory which has been left at boot time */

                        /* Ok., Ok. this is an evil hack - we make
                         * the assumption that physical addresses are
                         * the same as bus addresses (true at least
                         * for Intel processors). The whole method of
                         * obtaining and using this memory is not very
                         * nice - but I hope it saves some poor users
                         * from kernel hacking, which might have even
                         * more evil results */

                        if (i == 0) {
                                int size =
                                    fh->v4l_buffers.num_buffers *
                                    fh->v4l_buffers.buffer_size;

                                pmem = get_high_mem(size);
                                if (pmem == 0) {
                                        dprintk(1,
                                                KERN_ERR
                                                "%s: v4l_fbuffer_alloc() - get_high_mem (size = %d KB) for V4L bufs failed\n",
                                                ZR_DEVNAME(zr), size >> 10);
                                        return -ENOBUFS;
                                }
                                fh->v4l_buffers.buffer[0].fbuffer = NULL;
                                fh->v4l_buffers.buffer[0].fbuffer_phys = pmem;
                                fh->v4l_buffers.buffer[0].fbuffer_bus = pmem;
                                dprintk(4,
                                        KERN_INFO
                                        "%s: v4l_fbuffer_alloc() - using %d KB high memory\n",
                                        ZR_DEVNAME(zr), size >> 10);
                        } else {
                                fh->v4l_buffers.buffer[i].fbuffer = NULL;
                                fh->v4l_buffers.buffer[i].fbuffer_phys =
                                    pmem + i * fh->v4l_buffers.buffer_size;
                                fh->v4l_buffers.buffer[i].fbuffer_bus =
                                    pmem + i * fh->v4l_buffers.buffer_size;
                        }
                }
        }

        fh->v4l_buffers.allocated = 1;

        return 0;
}

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

        dprintk(4, KERN_INFO "%s: v4l_fbuffer_free()\n", ZR_DEVNAME(zr));

        for (i = 0; i < fh->v4l_buffers.num_buffers; i++) {
                if (!fh->v4l_buffers.buffer[i].fbuffer)
                        continue;

                if (fh->v4l_buffers.buffer_size <= MAX_KMALLOC_MEM) {
                        mem = fh->v4l_buffers.buffer[i].fbuffer;
                        for (off = 0; off < fh->v4l_buffers.buffer_size;
                             off += PAGE_SIZE)
                                ClearPageReserved(MAP_NR(mem + off));
                        kfree((void *) fh->v4l_buffers.buffer[i].fbuffer);
                }
                fh->v4l_buffers.buffer[i].fbuffer = NULL;
        }

        fh->v4l_buffers.allocated = 0;
        fh->v4l_buffers.ready_to_be_freed = 0;
}

/*
 *   Allocate the MJPEG grab buffers.
 *
 *   If the requested buffer size is smaller than MAX_KMALLOC_MEM,
 *   kmalloc is used to request a physically contiguous area,
 *   else we allocate the memory in framgents with get_zeroed_page.
 *
 *   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)
 *   The driver cares about this because it reduces the buffer
 *   size to MAX_KMALLOC_MEM in that case (which forces contiguous allocation).
 *
 *   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 file *file)
{
        struct zoran_fh *fh = file->private_data;
        struct zoran *zr = fh->zr;
        int i, j, off;
        unsigned long mem;

        /* we might have old buffers lying around */
        if (fh->jpg_buffers.ready_to_be_freed) {
                jpg_fbuffer_free(file);
        }

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

                /* Allocate fragment table for this buffer */

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

                //if (alloc_contig) {
                if (fh->jpg_buffers.need_contiguous) {
                        mem =
                            (unsigned long) kmalloc(fh->jpg_buffers.
                                                    buffer_size,
                                                    GFP_KERNEL);
                        if (mem == 0) {
                                dprintk(1,
                                        KERN_ERR
                                        "%s: jpg_fbuffer_alloc() - kmalloc failed for buffer %d\n",
                                        ZR_DEVNAME(zr), i);
                                jpg_fbuffer_free(file);
                                return -ENOBUFS;
                        }
                        fh->jpg_buffers.buffer[i].frag_tab[0] =
                            cpu_to_le32(virt_to_bus((void *) mem));
                        fh->jpg_buffers.buffer[i].frag_tab[1] =
                            cpu_to_le32(((fh->jpg_buffers.buffer_size / 4) << 1) | 1);
                        for (off = 0; off < fh->jpg_buffers.buffer_size;
                             off += PAGE_SIZE)
                                SetPageReserved(MAP_NR(mem + off));
                } else {
                        /* jpg_bufsize is allreay page aligned */
                        for (j = 0;
                             j < fh->jpg_buffers.buffer_size / PAGE_SIZE;
                             j++) {
                                mem = get_zeroed_page(GFP_KERNEL);
                                if (mem == 0) {
                                        dprintk(1,
                                                KERN_ERR
                                                "%s: jpg_fbuffer_alloc() - get_zeroed_page failed for buffer %d\n",
                                                ZR_DEVNAME(zr), i);
                                        jpg_fbuffer_free(file);
                                        return -ENOBUFS;
                                }

                                fh->jpg_buffers.buffer[i].frag_tab[2 * j] =
                                    cpu_to_le32(virt_to_bus((void *) mem));
                                fh->jpg_buffers.buffer[i].frag_tab[2 * j +
                                                                   1] =
                                    cpu_to_le32((PAGE_SIZE / 4) << 1);
                                SetPageReserved(MAP_NR(mem));
                        }

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

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

        fh->jpg_buffers.allocated = 1;

        return 0;
}

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

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

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

                //if (alloc_contig) {
                if (fh->jpg_buffers.need_contiguous) {
                        if (fh->jpg_buffers.buffer[i].frag_tab[0]) {
                                mem = (unsigned char *) bus_to_virt(le32_to_cpu(
                                        fh->jpg_buffers.buffer[i].frag_tab[0]));
                                for (off = 0;
                                     off < fh->jpg_buffers.buffer_size;
                                     off += PAGE_SIZE)
                                        ClearPageReserved(MAP_NR
                                                          (mem + off));
                                kfree(mem);
                                fh->jpg_buffers.buffer[i].frag_tab[0] = 0;
                                fh->jpg_buffers.buffer[i].frag_tab[1] = 0;
                        }
                } else {
                        for (j = 0;
                             j < fh->jpg_buffers.buffer_size / PAGE_SIZE;
                             j++) {
                                if (!fh->jpg_buffers.buffer[i].
                                    frag_tab[2 * j])
                                        break;
                                ClearPageReserved(MAP_NR
                                                  (bus_to_virt
                                                   (le32_to_cpu
                                                    (fh->jpg_buffers.
                                                     buffer[i].frag_tab[2 *
                                                                       j]))));
                                free_page((unsigned long)
                                          bus_to_virt
                                                  (le32_to_cpu
                                                   (fh->jpg_buffers.
                                                      buffer[i].
                                                      frag_tab[2 * j])));
                                fh->jpg_buffers.buffer[i].frag_tab[2 * j] =
                                    0;
                                fh->jpg_buffers.buffer[i].frag_tab[2 * j +
                                                                   1] = 0;
                        }
                }

                free_page((unsigned long) fh->jpg_buffers.buffer[i].
                          frag_tab);
                fh->jpg_buffers.buffer[i].frag_tab = NULL;
        }

        fh->jpg_buffers.allocated = 0;
        fh->jpg_buffers.ready_to_be_freed = 0;
}

/*
 *   V4L Buffer grabbing
 */

static int
zoran_v4l_set_format (struct file               *file,
                      int                        width,
                      int                        height,
                      const struct zoran_format *format)
{
        struct zoran_fh *fh = file->private_data;
        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: v4l_set_format() - wrong frame size (%dx%d)\n",
                        ZR_DEVNAME(zr), width, height);
                return -EINVAL;
        }

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

        /* Check against available buffer size */
        if (height * width * bpp > fh->v4l_buffers.buffer_size) {
                dprintk(1,
                        KERN_ERR
                        "%s: v4l_set_format() - video buffer size (%d kB) is too small\n",
                        ZR_DEVNAME(zr), fh->v4l_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: v4l_set_format() - wrong frame alingment\n",
                        ZR_DEVNAME(zr));
                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 file *file,
                       int          num)
{
        struct zoran_fh *fh = file->private_data;
        struct zoran *zr = fh->zr;
        unsigned long flags;
        int res = 0;

        if (!fh->v4l_buffers.allocated) {
                dprintk(1,
                        KERN_ERR
                        "%s: v4l_queue_frame() - buffers not yet allocated\n",
                        ZR_DEVNAME(zr));
                res = -ENOMEM;
        }

        /* No grabbing outside the buffer range! */
        if (num >= fh->v4l_buffers.num_buffers || num < 0) {
                dprintk(1,
                        KERN_ERR
                        "%s: v4l_queue_frame() - buffer %d is out of range\n",
                        ZR_DEVNAME(zr), num);
                res = -EINVAL;
        }

        spin_lock_irqsave(&zr->spinlock, flags);

        if (fh->v4l_buffers.active == ZORAN_FREE) {
                if (zr->v4l_buffers.active == ZORAN_FREE) {
                        zr->v4l_buffers = fh->v4l_buffers;
                        fh->v4l_buffers.active = ZORAN_ACTIVE;
                } else {
                        dprintk(1,
                                KERN_ERR
                                "%s: v4l_queue_frame() - another session is already capturing\n",
                                ZR_DEVNAME(zr));
                        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->v4l_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: v4l_queue_frame() - queueing buffer %d in state DONE!?\n",
                                ZR_DEVNAME(zr), 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->v4l_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->v4l_buffers.active;

        return res;
}

static int
v4l_grab (struct file       *file,
          struct video_mmap *mp)
{
        struct zoran_fh *fh = file->private_data;
        struct zoran *zr = fh->zr;
        int res = 0, i;

        for (i = 0; i < NUM_FORMATS; i++) {
                if (zoran_formats[i].palette == mp->format &&
                    zoran_formats[i].flags & ZORAN_FORMAT_CAPTURE &&
                    !(zoran_formats[i].flags & ZORAN_FORMAT_COMPRESSED))
                        break;
        }
        if (i == NUM_FORMATS || zoran_formats[i].depth == 0) {
                dprintk(1,
                        KERN_ERR
                        "%s: v4l_grab() - wrong bytes-per-pixel format\n",
                        ZR_DEVNAME(zr));
                return -EINVAL;
        }

        /*
         * To minimize the time spent in the IRQ routine, we avoid setting up
         * the video front end there.
         * If this grab has different parameters from a running streaming capture
         * we stop the streaming capture and start it over again.
         */
        if (zr->v4l_memgrab_active &&
            (zr->v4l_settings.width != mp->width ||
             zr->v4l_settings.height != mp->height ||
             zr->v4l_settings.format->palette != mp->format)) {
                res = wait_grab_pending(zr);
                if (res)
                        return res;
        }
        if ((res = zoran_v4l_set_format(file,
                                        mp->width,
                                        mp->height,
                                        &zoran_formats[i])))
                return res;
        zr->v4l_settings = fh->v4l_settings;

        /* queue the frame in the pending queue */
        if ((res = zoran_v4l_queue_frame(file, mp->frame))) {
                fh->v4l_buffers.active = ZORAN_FREE;
                return res;
        }

        /* put the 36057 into frame grabbing mode */
        if (!res && !zr->v4l_memgrab_active)
                zr36057_set_memgrab(zr, 1);

        //dprintk(4, KERN_INFO "%s: Frame grab 3...\n", ZR_DEVNAME(zr));

        return res;
}

/*
 * Sync on a V4L buffer
 */

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

        if (fh->v4l_buffers.active == ZORAN_FREE) {
                dprintk(1,
                        KERN_ERR
                        "%s: v4l_sync() - no grab active for this session\n",
                        ZR_DEVNAME(zr));
                return -EINVAL;
        }

        /* check passed-in frame number */
        if (frame >= fh->v4l_buffers.num_buffers || frame < 0) {
                dprintk(1,
                        KERN_ERR "%s: v4l_sync() - frame %d is invalid\n",
                        ZR_DEVNAME(zr), 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: v4l_sync() - attempt to sync on a buffer which was not queued?\n",
                        ZR_DEVNAME(zr));
                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: v4l_sync() - internal state error\n",
                        ZR_DEVNAME(zr));

        zr->v4l_buffers.buffer[frame].state = BUZ_STATE_USER;
        fh->v4l_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->v4l_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 file          *file,
                       int                   num,
                       enum zoran_codec_mode mode)
{
        struct zoran_fh *fh = file->private_data;
        struct zoran *zr = fh->zr;
        unsigned long flags;
        int res = 0;

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

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

        if (fh->jpg_buffers.active == ZORAN_FREE) {
                if (zr->jpg_buffers.active == ZORAN_FREE) {
                        zr->jpg_buffers = fh->jpg_buffers;
                        fh->jpg_buffers.active = ZORAN_ACTIVE;
                } else {
                        dprintk(1,
                                KERN_ERR
                                "%s: jpg_queue_frame() - another session is already capturing\n",
                                ZR_DEVNAME(zr));
                        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: jpg_queue_frame() - queing frame in BUZ_STATE_DONE state!?\n",
                                ZR_DEVNAME(zr));
                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->jpg_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->jpg_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->jpg_buffers.active;
        }

        return res;
}

static int
jpg_qbuf (struct file          *file,
          int                   frame,
          enum zoran_codec_mode mode)
{
        struct zoran_fh *fh = file->private_data;
        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->jpg_buffers.active == ZORAN_FREE) {
                                dprintk(1,
                                        KERN_ERR
                                        "%s: jpg_qbuf(-1) - session not active\n",
                                        ZR_DEVNAME(zr));
                                return -EINVAL;
                        }
                        fh->jpg_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: jpg_qbuf() - stop streaming but not in streaming mode\n",
                                ZR_DEVNAME(zr));
                        return -EINVAL;
                }
        }

        if ((res = zoran_jpg_queue_frame(file, 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 file       *file,
          struct zoran_sync *bs)
{
        struct zoran_fh *fh = file->private_data;
        struct zoran *zr = fh->zr;
        unsigned long flags;
        int frame;

        if (fh->jpg_buffers.active == ZORAN_FREE) {
                dprintk(1,
                        KERN_ERR
                        "%s: jpg_sync() - capture is not currently active\n",
                        ZR_DEVNAME(zr));
                return -EINVAL;
        }
        if (zr->codec_mode != BUZ_MODE_MOTION_DECOMPRESS &&
            zr->codec_mode != BUZ_MODE_MOTION_COMPRESS) {
                dprintk(1,
                        KERN_ERR
                        "%s: jpg_sync() - codec not in streaming mode\n",
                        ZR_DEVNAME(zr));
                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: jpg_sync() - timeout: codec isr=0x%02x\n",
                        ZR_DEVNAME(zr), 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: jpg_sync() - internal state error\n",
                        ZR_DEVNAME(zr));

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

        spin_unlock_irqrestore(&zr->spinlock, flags);

        return 0;
}

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

        /* Per default, map the V4L Buffers */
        fh->map_mode = ZORAN_MAP_MODE_RAW;

        /* 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;

        /* v4l_buffers */
        memset(&fh->v4l_buffers, 0, sizeof(struct zoran_v4l_struct));
        for (i = 0; i < VIDEO_MAX_FRAME; i++) {
                fh->v4l_buffers.buffer[i].state = BUZ_STATE_USER;       /* nothing going on */
                fh->v4l_buffers.buffer[i].bs.frame = i;
        }
        fh->v4l_buffers.allocated = 0;
        fh->v4l_buffers.ready_to_be_freed = 0;
        fh->v4l_buffers.active = ZORAN_FREE;
        fh->v4l_buffers.buffer_size = v4l_bufsize;
        fh->v4l_buffers.num_buffers = v4l_nbufs;

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

        /* jpg_buffers */
        memset(&fh->jpg_buffers, 0, sizeof(struct zoran_jpg_struct));
        for (i = 0; i < BUZ_MAX_FRAME; i++) {
                fh->jpg_buffers.buffer[i].state = BUZ_STATE_USER;       /* nothing going on */
                fh->jpg_buffers.buffer[i].bs.frame = i;
        }
        fh->jpg_buffers.need_contiguous = zr->jpg_buffers.need_contiguous;
        fh->jpg_buffers.allocated = 0;
        fh->jpg_buffers.ready_to_be_freed = 0;
        fh->jpg_buffers.active = ZORAN_FREE;
        fh->jpg_buffers.buffer_size = jpg_bufsize;
        fh->jpg_buffers.num_buffers = jpg_nbufs;
}

static void
zoran_close_end_session (struct file *file)
{
        struct zoran_fh *fh = file->private_data;
        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;
        }

        /* v4l capture */
        if (fh->v4l_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->v4l_buffers.active =
                    ZORAN_FREE;
                spin_unlock_irqrestore(&zr->spinlock, flags);
        }

        /* v4l buffers */
        if (fh->v4l_buffers.allocated ||
            fh->v4l_buffers.ready_to_be_freed) {
                v4l_fbuffer_free(file);
        }

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

        /* jpg buffers */
        if (fh->jpg_buffers.allocated ||
            fh->jpg_buffers.ready_to_be_freed) {
                jpg_fbuffer_free(file);
        }
}

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

static int
zoran_open (struct inode *inode,
            struct file  *file)
{
        unsigned int minor = iminor(inode);
        struct zoran *zr = NULL;
        struct zoran_fh *fh;
        int i, res, first_open = 0, have_module_locks = 0;

        /* find the device */
        for (i = 0; i < zoran_num; i++) {
                if (zoran[i]->video_dev->minor == minor) {
                        zr = zoran[i];
                        break;
                }
        }

        if (!zr) {
                dprintk(1, KERN_ERR "%s: device not found!\n", ZORAN_NAME);
                res = -ENODEV;
                goto open_unlock_and_return;
        }

        /* see fs/device.c - the kernel already locks during open(),
         * so locking ourselves only causes deadlocks */
        /*mutex_lock(&zr->resource_lock);*/

        if (!zr->decoder) {
                dprintk(1,
                        KERN_ERR "%s: no TV decoder loaded for device!\n",
                        ZR_DEVNAME(zr));
                res = -EIO;
                goto open_unlock_and_return;
        }

        /* try to grab a module lock */
        if (!try_module_get(THIS_MODULE)) {
                dprintk(1,
                        KERN_ERR
                        "%s: failed to acquire my own lock! PANIC!\n",
                        ZR_DEVNAME(zr));
                res = -ENODEV;
                goto open_unlock_and_return;
        }
        if (!try_module_get(zr->decoder->driver->driver.owner)) {
                dprintk(1,
                        KERN_ERR
                        "%s: failed to grab ownership of i2c decoder\n",
                        ZR_DEVNAME(zr));
                res = -EIO;
                module_put(THIS_MODULE);
                goto open_unlock_and_return;
        }
        if (zr->encoder &&
            !try_module_get(zr->encoder->driver->driver.owner)) {
                dprintk(1,
                        KERN_ERR
                        "%s: failed to grab ownership of i2c encoder\n",
                        ZR_DEVNAME(zr));
                res = -EIO;
                module_put(zr->decoder->driver->driver.owner);
                module_put(THIS_MODULE);
                goto open_unlock_and_return;
        }

        have_module_locks = 1;

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

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

        /* now, create the open()-specific file_ops struct */
        fh = kzalloc(sizeof(struct zoran_fh), GFP_KERNEL);
        if (!fh) {
                dprintk(1,
                        KERN_ERR
                        "%s: zoran_open() - allocation of zoran_fh failed\n",
                        ZR_DEVNAME(zr));
                res = -ENOMEM;
                goto open_unlock_and_return;
        }
        /* 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: zoran_open() - allocation of overlay_mask failed\n",
                        ZR_DEVNAME(zr));
                kfree(fh);
                res = -ENOMEM;
                goto open_unlock_and_return;
        }

        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(file);

        return 0;

open_unlock_and_return:
        /* if we grabbed locks, release them accordingly */
        if (have_module_locks) {
                module_put(zr->decoder->driver->driver.owner);
                if (zr->encoder) {
                        module_put(zr->encoder->driver->driver.owner);
                }
                module_put(THIS_MODULE);
        }

        /* if there's no device found, we didn't obtain the lock either */
        if (zr) {
                /*mutex_unlock(&zr->resource_lock);*/
        }

        return res;
}

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

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

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

        zoran_close_end_session(file);

        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 */
                        int zero = 0, two = 2;
                        decoder_command(zr, DECODER_ENABLE_OUTPUT, &zero);
                        encoder_command(zr, ENCODER_SET_INPUT, &two);
                }
        }

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

        /* release locks on the i2c modules */
        module_put(zr->decoder->driver->driver.owner);
        if (zr->encoder) {
                 module_put(zr->encoder->driver->driver.owner);
        }
        module_put(THIS_MODULE);

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

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

        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 file               *file,
               void                      *base,
               const struct zoran_format *fmt,
               int                        width,
               int                        height,
               int                        bytesperline)
{
        struct zoran_fh *fh = file->private_data;
        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: setup_fbuffer() - forced overlay turnoff because framebuffer changed\n",
                        ZR_DEVNAME(zr));
                zr36057_overlay(zr, 0);
        }
#endif

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

        zr->buffer.base = (void *) ((unsigned long) base & ~3);
        zr->buffer.height = height;
        zr->buffer.width = width;
        zr->buffer.depth = fmt->depth;
        zr->overlay_settings.format = fmt;
        zr->buffer.bytesperline = bytesperline;

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

        return 0;
}


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


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

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

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

        if (zr->buffer.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: setup_window() - width = %d or height = %d invalid\n",
                        ZR_DEVNAME(zr), 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 video_clip) * (clipcount + 4));
                if (vcp == NULL) {
                        dprintk(1,
                                KERN_ERR
                                "%s: setup_window() - Alloc of clip mask failed\n",
                                ZR_DEVNAME(zr));
                        return -ENOMEM;
                }
                if (copy_from_user
                    (vcp, clips, sizeof(struct video_clip) * clipcount)) {
                        vfree(vcp);
                        return -EFAULT;
                }
                write_overlay_mask(file, 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 file *file,
               int          on)
{
        struct zoran_fh *fh = file->private_data;
        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: setup_overlay() - overlay is already active for another session\n",
                        ZR_DEVNAME(zr));
                return -EBUSY;
        }
        if (!on && zr->overlay_active != ZORAN_FREE &&
            fh->overlay_active == ZORAN_FREE) {
                dprintk(1,
                        KERN_ERR
                        "%s: setup_overlay() - you cannot cancel someone else's session\n",
                        ZR_DEVNAME(zr));
                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->buffer.base || !fh->overlay_settings.is_set) {
                        dprintk(1,
                                KERN_ERR
                                "%s: setup_overlay() - buffer or window not set\n",
                                ZR_DEVNAME(zr));
                        return -EINVAL;
                }
                if (!fh->overlay_settings.format) {
                        dprintk(1,
                                KERN_ERR
                                "%s: setup_overlay() - no overlay format set\n",
                                ZR_DEVNAME(zr));
                        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 file        *file,
                          struct v4l2_buffer *buf,
                          int                 num)
{
        struct zoran_fh *fh = file->private_data;
        struct zoran *zr = fh->zr;

        buf->flags = V4L2_BUF_FLAG_MAPPED;

        switch (fh->map_mode) {
        case ZORAN_MAP_MODE_RAW:

                /* check range */
                if (num < 0 || num >= fh->v4l_buffers.num_buffers ||
                    !fh->v4l_buffers.allocated) {
                        dprintk(1,
                                KERN_ERR
                                "%s: v4l2_buffer_status() - wrong number or buffers not allocated\n",
                                ZR_DEVNAME(zr));
                        return -EINVAL;
                }

                buf->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
                buf->length = fh->v4l_buffers.buffer_size;

                /* get buffer */
                buf->bytesused = fh->v4l_buffers.buffer[num].bs.length;
                if (fh->v4l_buffers.buffer[num].state == BUZ_STATE_DONE ||
                    fh->v4l_buffers.buffer[num].state == BUZ_STATE_USER) {
                        buf->sequence = fh->v4l_buffers.buffer[num].bs.seq;
                        buf->flags |= V4L2_BUF_FLAG_DONE;
                        buf->timestamp =
                            fh->v4l_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->jpg_buffers.num_buffers ||
                    !fh->jpg_buffers.allocated) {
                        dprintk(1,
                                KERN_ERR
                                "%s: v4l2_buffer_status() - wrong number or buffers not allocated\n",
                                ZR_DEVNAME(zr));
                        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->jpg_buffers.buffer_size;

                /* these variables are only written after frame has been captured */
                if (fh->jpg_buffers.buffer[num].state == BUZ_STATE_DONE ||
                    fh->jpg_buffers.buffer[num].state == BUZ_STATE_USER) {
                        buf->sequence = fh->jpg_buffers.buffer[num].bs.seq;
                        buf->timestamp =
                            fh->jpg_buffers.buffer[num].bs.timestamp;
                        buf->bytesused =
                            fh->jpg_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: v4l2_buffer_status() - invalid buffer type|map_mode (%d|%d)\n",
                        ZR_DEVNAME(zr), 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,
                int           norm) /* VIDEO_MODE_* */
{
        int norm_encoder, on;

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

        if (lock_norm && norm != zr->norm) {
                if (lock_norm > 1) {
                        dprintk(1,
                                KERN_WARNING
                                "%s: set_norm() - TV standard is locked, can not switch norm\n",
                                ZR_DEVNAME(zr));
                        return -EPERM;
                } else {
                        dprintk(1,
                                KERN_WARNING
                                "%s: set_norm() - TV standard is locked, norm was not changed\n",
                                ZR_DEVNAME(zr));
                        norm = zr->norm;
                }
        }

        if (norm != VIDEO_MODE_AUTO &&
            (norm < 0 || norm >= zr->card.norms ||
             !zr->card.tvn[norm])) {
                dprintk(1,
                        KERN_ERR "%s: set_norm() - unsupported norm %d\n",
                        ZR_DEVNAME(zr), norm);
                return -EINVAL;
        }

        if (norm == VIDEO_MODE_AUTO) {
                int status;

                /* if we have autodetect, ... */
                struct video_decoder_capability caps;
                decoder_command(zr, DECODER_GET_CAPABILITIES, &caps);
                if (!(caps.flags & VIDEO_DECODER_AUTO)) {
                        dprintk(1, KERN_ERR "%s: norm=auto unsupported\n",
                                ZR_DEVNAME(zr));
                        return -EINVAL;
                }

                decoder_command(zr, DECODER_SET_NORM, &norm);

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

                decoder_command(zr, DECODER_GET_STATUS, &status);
                if (!(status & DECODER_STATUS_GOOD)) {
                        dprintk(1,
                                KERN_ERR
                                "%s: set_norm() - no norm detected\n",
                                ZR_DEVNAME(zr));
                        /* reset norm */
                        decoder_command(zr, DECODER_SET_NORM, &zr->norm);
                        return -EIO;
                }

                if (status & DECODER_STATUS_NTSC)
                        norm = VIDEO_MODE_NTSC;
                else if (status & DECODER_STATUS_SECAM)
                        norm = VIDEO_MODE_SECAM;
                else
                        norm = VIDEO_MODE_PAL;
        }
        zr->timing = zr->card.tvn[norm];
        norm_encoder = norm;

        /* 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_command(zr, DECODER_SET_NORM, &norm);
        encoder_command(zr, ENCODER_SET_NORM, &norm_encoder);

        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)
{
        int realinput;

        if (input == zr->input) {
                return 0;
        }

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

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

        realinput = zr->card.input[input].muxsel;
        zr->input = input;

        decoder_command(zr, DECODER_SET_INPUT, &realinput);

        return 0;
}

/*
 *   ioctl routine
 */

static int
zoran_do_ioctl (struct inode *inode,
                struct file  *file,
                unsigned int  cmd,
                void         *arg)
{
        struct zoran_fh *fh = file->private_data;
        struct zoran *zr = fh->zr;
        /* CAREFUL: used in multiple places here */
        struct zoran_jpg_settings settings;

        /* we might have older buffers lying around... We don't want
         * to wait, but we do want to try cleaning them up ASAP. So
         * we try to obtain the lock and free them. If that fails, we
         * don't do anything and wait for the next turn. In the end,
         * zoran_close() or a new allocation will still free them...
         * This is just a 'the sooner the better' extra 'feature'
         *
         * We don't free the buffers right on munmap() because that
         * causes oopses (kfree() inside munmap() oopses for no
         * apparent reason - it's also not reproduceable in any way,
         * but moving the free code outside the munmap() handler fixes
         * all this... If someone knows why, please explain me (Ronald)
         */
        if (mutex_trylock(&zr->resource_lock)) {
                /* we obtained it! Let's try to free some things */
                if (fh->jpg_buffers.ready_to_be_freed)
                        jpg_fbuffer_free(file);
                if (fh->v4l_buffers.ready_to_be_freed)
                        v4l_fbuffer_free(file);

                mutex_unlock(&zr->resource_lock);
        }

        switch (cmd) {

        case VIDIOCGCAP:
        {
                struct video_capability *vcap = arg;

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

                memset(vcap, 0, sizeof(struct video_capability));
                strncpy(vcap->name, ZR_DEVNAME(zr), sizeof(vcap->name)-1);
                vcap->type = ZORAN_VID_TYPE;

                vcap->channels = zr->card.inputs;
                vcap->audios = 0;
                mutex_lock(&zr->resource_lock);
                vcap->maxwidth = BUZ_MAX_WIDTH;
                vcap->maxheight = BUZ_MAX_HEIGHT;
                vcap->minwidth = BUZ_MIN_WIDTH;
                vcap->minheight = BUZ_MIN_HEIGHT;
                mutex_unlock(&zr->resource_lock);

                return 0;
        }
                break;

        case VIDIOCGCHAN:
        {
                struct video_channel *vchan = arg;
                int channel = vchan->channel;

                dprintk(3, KERN_DEBUG "%s: VIDIOCGCHAN - channel=%d\n",
                        ZR_DEVNAME(zr), vchan->channel);

                memset(vchan, 0, sizeof(struct video_channel));
                if (channel > zr->card.inputs || channel < 0) {
                        dprintk(1,
                                KERN_ERR
                                "%s: VIDIOCGCHAN on not existing channel %d\n",
                                ZR_DEVNAME(zr), channel);
                        return -EINVAL;
                }

                strcpy(vchan->name, zr->card.input[channel].name);

                vchan->tuners = 0;
                vchan->flags = 0;
                vchan->type = VIDEO_TYPE_CAMERA;
                mutex_lock(&zr->resource_lock);
                vchan->norm = zr->norm;
                mutex_unlock(&zr->resource_lock);
                vchan->channel = channel;

                return 0;
        }
                break;

                /* RJ: the documentation at http://roadrunner.swansea.linux.org.uk/v4lapi.shtml says:
                 *
                 * * "The VIDIOCSCHAN ioctl takes an integer argument and switches the capture to this input."
                 * *                                 ^^^^^^^
                 * * The famos BTTV driver has it implemented with a struct video_channel argument
                 * * and we follow it for compatibility reasons
                 * *
                 * * BTW: this is the only way the user can set the norm!
                 */

        case VIDIOCSCHAN:
        {
                struct video_channel *vchan = arg;
                int res;

                dprintk(3,
                        KERN_DEBUG
                        "%s: VIDIOCSCHAN - channel=%d, norm=%d\n",
                        ZR_DEVNAME(zr), vchan->channel, vchan->norm);

                mutex_lock(&zr->resource_lock);
                if ((res = zoran_set_input(zr, vchan->channel)))
                        goto schan_unlock_and_return;
                if ((res = zoran_set_norm(zr, vchan->norm)))
                        goto schan_unlock_and_return;

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

        case VIDIOCGPICT:
        {
                struct video_picture *vpict = arg;

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

                memset(vpict, 0, sizeof(struct video_picture));
                mutex_lock(&zr->resource_lock);
                vpict->hue = zr->hue;
                vpict->brightness = zr->brightness;
                vpict->contrast = zr->contrast;
                vpict->colour = zr->saturation;
                if (fh->overlay_settings.format) {
                        vpict->depth = fh->overlay_settings.format->depth;
                        vpict->palette = fh->overlay_settings.format->palette;
                } else {
                        vpict->depth = 0;
                }
                mutex_unlock(&zr->resource_lock);

                return 0;
        }
                break;

        case VIDIOCSPICT:
        {
                struct video_picture *vpict = arg;
                int i;

                dprintk(3,
                        KERN_DEBUG
                        "%s: VIDIOCSPICT - bri=%d, hue=%d, col=%d, con=%d, dep=%d, pal=%d\n",
                        ZR_DEVNAME(zr), vpict->brightness, vpict->hue,
                        vpict->colour, vpict->contrast, vpict->depth,
                        vpict->palette);

                for (i = 0; i < NUM_FORMATS; i++) {
                        const struct zoran_format *fmt = &zoran_formats[i];

                        if (fmt->palette != -1 &&
                            fmt->flags & ZORAN_FORMAT_OVERLAY &&
                            fmt->palette == vpict->palette &&
                            fmt->depth == vpict->depth)
                                break;
                }
                if (i == NUM_FORMATS) {
                        dprintk(1,
                                KERN_ERR
                                "%s: VIDIOCSPICT - Invalid palette %d\n",
                                ZR_DEVNAME(zr), vpict->palette);
                        return -EINVAL;
                }

                mutex_lock(&zr->resource_lock);

                decoder_command(zr, DECODER_SET_PICTURE, vpict);

                zr->hue = vpict->hue;
                zr->contrast = vpict->contrast;
                zr->saturation = vpict->colour;
                zr->brightness = vpict->brightness;

                fh->overlay_settings.format = &zoran_formats[i];

                mutex_unlock(&zr->resource_lock);

                return 0;
        }
                break;

        case VIDIOCCAPTURE:
        {
                int *on = arg, res;

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

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

                return res;
        }
                break;

        case VIDIOCGWIN:
        {
                struct video_window *vwin = arg;

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

                memset(vwin, 0, sizeof(struct video_window));
                mutex_lock(&zr->resource_lock);
                vwin->x = fh->overlay_settings.x;
                vwin->y = fh->overlay_settings.y;
                vwin->width = fh->overlay_settings.width;
                vwin->height = fh->overlay_settings.height;
                mutex_unlock(&zr->resource_lock);
                vwin->clipcount = 0;
                return 0;
        }
                break;

        case VIDIOCSWIN:
        {
                struct video_window *vwin = arg;
                int res;

                dprintk(3,
                        KERN_DEBUG
                        "%s: VIDIOCSWIN - x=%d, y=%d, w=%d, h=%d, clipcount=%d\n",
                        ZR_DEVNAME(zr), vwin->x, vwin->y, vwin->width,
                        vwin->height, vwin->clipcount);

                mutex_lock(&zr->resource_lock);
                res =
                    setup_window(file, vwin->x, vwin->y, vwin->width,
                                 vwin->height, vwin->clips,
                                 vwin->clipcount, NULL);
                mutex_unlock(&zr->resource_lock);

                return res;
        }
                break;

        case VIDIOCGFBUF:
        {
                struct video_buffer *vbuf = arg;

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

                mutex_lock(&zr->resource_lock);
                *vbuf = zr->buffer;
                mutex_unlock(&zr->resource_lock);
                return 0;
        }
                break;

        case VIDIOCSFBUF:
        {
                struct video_buffer *vbuf = arg;
                int i, res = 0;

                dprintk(3,
                        KERN_DEBUG
                        "%s: VIDIOCSFBUF - base=%p, w=%d, h=%d, depth=%d, bpl=%d\n",
                        ZR_DEVNAME(zr), vbuf->base, vbuf->width,
                        vbuf->height, vbuf->depth, vbuf->bytesperline);

                for (i = 0; i < NUM_FORMATS; i++)
                        if (zoran_formats[i].depth == vbuf->depth)
                                break;
                if (i == NUM_FORMATS) {
                        dprintk(1,
                                KERN_ERR
                                "%s: VIDIOCSFBUF - invalid fbuf depth %d\n",
                                ZR_DEVNAME(zr), vbuf->depth);
                        return -EINVAL;
                }

                mutex_lock(&zr->resource_lock);
                res =
                    setup_fbuffer(file, vbuf->base, &zoran_formats[i],
                                  vbuf->width, vbuf->height,
                                  vbuf->bytesperline);
                mutex_unlock(&zr->resource_lock);

                return res;
        }
                break;

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

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

                mutex_lock(&zr->resource_lock);
                res = v4l_sync(file, *frame);
                mutex_unlock(&zr->resource_lock);
                if (!res)
                        zr->v4l_sync_tail++;
                return res;
        }
                break;

        case VIDIOCMCAPTURE:
        {
                struct video_mmap *vmap = arg;
                int res;

                dprintk(3,
                        KERN_DEBUG
                        "%s: VIDIOCMCAPTURE - frame=%d, geom=%dx%d, fmt=%d\n",
                        ZR_DEVNAME(zr), vmap->frame, vmap->width, vmap->height,
                        vmap->format);

                mutex_lock(&zr->resource_lock);
                res = v4l_grab(file, vmap);
                mutex_unlock(&zr->resource_lock);
                return res;
        }
                break;

        case VIDIOCGMBUF:
        {
                struct video_mbuf *vmbuf = arg;
                int i, res = 0;

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

                vmbuf->size =
                    fh->v4l_buffers.num_buffers *
                    fh->v4l_buffers.buffer_size;
                vmbuf->frames = fh->v4l_buffers.num_buffers;
                for (i = 0; i < vmbuf->frames; i++) {
                        vmbuf->offsets[i] =
                            i * fh->v4l_buffers.buffer_size;
                }

                mutex_lock(&zr->resource_lock);

                if (fh->jpg_buffers.allocated || fh->v4l_buffers.allocated) {
                        dprintk(1,
                                KERN_ERR
                                "%s: VIDIOCGMBUF - buffers already allocated\n",
                                ZR_DEVNAME(zr));
                        res = -EINVAL;
                        goto v4l1reqbuf_unlock_and_return;
                }

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

                /* The next mmap will map the V4L buffers */
                fh->map_mode = ZORAN_MAP_MODE_RAW;
        v4l1reqbuf_unlock_and_return:
                mutex_unlock(&zr->resource_lock);

                return res;
        }
                break;

        case VIDIOCGUNIT:
        {
                struct video_unit *vunit = arg;

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

                vunit->video = zr->video_dev->minor;
                vunit->vbi = VIDEO_NO_UNIT;
                vunit->radio = VIDEO_NO_UNIT;
                vunit->audio = VIDEO_NO_UNIT;
                vunit->teletext = VIDEO_NO_UNIT;

                return 0;
        }
                break;

                /*
                 * RJ: In principal we could support subcaptures for V4L grabbing.
                 *     Not even the famous BTTV driver has them, however.
                 *     If there should be a strong demand, one could consider
                 *     to implement them.
                 */
        case VIDIOCGCAPTURE:
        {
                dprintk(3, KERN_ERR "%s: VIDIOCGCAPTURE not supported\n",
                        ZR_DEVNAME(zr));
                return -EINVAL;
        }
                break;

        case VIDIOCSCAPTURE:
        {
                dprintk(3, KERN_ERR "%s: VIDIOCSCAPTURE not supported\n",
                        ZR_DEVNAME(zr));
                return -EINVAL;
        }
                break;

        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);

                bparams->norm = zr->norm;
                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;
        }
                break;

        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)) {
                        res = -EINVAL;
                        goto sparams_unlock_and_return;
                }

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

                return res;
        }
                break;

        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;
                if (fh->jpg_buffers.need_contiguous &&
                    breq->size > MAX_KMALLOC_MEM)
                        breq->size = MAX_KMALLOC_MEM;

                mutex_lock(&zr->resource_lock);

                if (fh->jpg_buffers.allocated || fh->v4l_buffers.allocated) {
                        dprintk(1,
                                KERN_ERR
                                "%s: BUZIOC_REQBUFS - buffers allready allocated\n",
                                ZR_DEVNAME(zr));
                        res = -EBUSY;
                        goto jpgreqbuf_unlock_and_return;
                }

                fh->jpg_buffers.num_buffers = breq->count;
                fh->jpg_buffers.buffer_size = breq->size;

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

                /* The next mmap will map the MJPEG buffers - could
                 * also be *_PLAY, but it doesn't matter here */
                fh->map_mode = ZORAN_MAP_MODE_JPG_REC;
        jpgreqbuf_unlock_and_return:
                mutex_unlock(&zr->resource_lock);

                return res;
        }
                break;

        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(file, *frame, BUZ_MODE_MOTION_COMPRESS);
                mutex_unlock(&zr->resource_lock);

                return res;
        }
                break;

        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(file, *frame, BUZ_MODE_MOTION_DECOMPRESS);
                mutex_unlock(&zr->resource_lock);

                return res;
        }
                break;

        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);
                res = jpg_sync(file, bsync);
                mutex_unlock(&zr->resource_lock);

                return res;
        }
                break;

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

                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;
                }

                input = zr->card.input[bstat->input].muxsel;
                norm = VIDEO_MODE_AUTO;

                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_command(zr, DECODER_SET_INPUT, &input);
                decoder_command(zr, DECODER_SET_NORM, &norm);

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

                /* Get status of video decoder */
                decoder_command(zr, DECODER_GET_STATUS, &status);

                /* restore previous input and norm */
                input = zr->card.input[zr->input].muxsel;
                decoder_command(zr, DECODER_SET_INPUT, &input);
                decoder_command(zr, DECODER_SET_NORM, &zr->norm);
        gstat_unlock_and_return:
                mutex_unlock(&zr->resource_lock);

                if (!res) {
                        bstat->signal =
                            (status & DECODER_STATUS_GOOD) ? 1 : 0;
                        if (status & DECODER_STATUS_NTSC)
                                bstat->norm = VIDEO_MODE_NTSC;
                        else if (status & DECODER_STATUS_SECAM)
                                bstat->norm = VIDEO_MODE_SECAM;
                        else
                                bstat->norm = VIDEO_MODE_PAL;

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

                return res;
        }
                break;

                /* The new video4linux2 capture interface - much nicer than video4linux1, since
                 * it allows for integrating the JPEG capturing calls inside standard v4l2
                 */

        case VIDIOC_QUERYCAP:
        {
                struct v4l2_capability *cap = arg;

                dprintk(3, KERN_DEBUG "%s: VIDIOC_QUERYCAP\n", ZR_DEVNAME(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 = ZORAN_V4L2_VID_FLAGS;

                return 0;
        }
                break;

        case VIDIOC_ENUM_FMT:
        {
                struct v4l2_fmtdesc *fmt = arg;
                int index = fmt->index, num = -1, i, flag = 0, type =
                    fmt->type;

                dprintk(3, KERN_DEBUG "%s: VIDIOC_ENUM_FMT - index=%d\n",
                        ZR_DEVNAME(zr), fmt->index);

                switch (fmt->type) {
                case V4L2_BUF_TYPE_VIDEO_CAPTURE:
                        flag = ZORAN_FORMAT_CAPTURE;
                        break;
                case V4L2_BUF_TYPE_VIDEO_OUTPUT:
                        flag = ZORAN_FORMAT_PLAYBACK;
                        break;
                case V4L2_BUF_TYPE_VIDEO_OVERLAY:
                        flag = ZORAN_FORMAT_OVERLAY;
                        break;
                default:
                        dprintk(1,
                                KERN_ERR
                                "%s: VIDIOC_ENUM_FMT - unknown type %d\n",
                                ZR_DEVNAME(zr), fmt->type);
                        return -EINVAL;
                }

                for (i = 0; i < NUM_FORMATS; i++) {
                        if (zoran_formats[i].flags & flag)
                                num++;
                        if (num == fmt->index)
                                break;
                }
                if (fmt->index < 0 /* late, but not too late */  ||
                    i == NUM_FORMATS)
                        return -EINVAL;

                memset(fmt, 0, sizeof(*fmt));
                fmt->index = index;
                fmt->type = type;
                strncpy(fmt->description, zoran_formats[i].name, sizeof(fmt->description)-1);
                fmt->pixelformat = zoran_formats[i].fourcc;
                if (zoran_formats[i].flags & ZORAN_FORMAT_COMPRESSED)
                        fmt->flags |= V4L2_FMT_FLAG_COMPRESSED;

                return 0;
        }
                break;

        case VIDIOC_G_FMT:
        {
                struct v4l2_format *fmt = arg;
                int type = fmt->type;

                dprintk(5, KERN_DEBUG "%s: VIDIOC_G_FMT\n", ZR_DEVNAME(zr));

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

                switch (fmt->type) {
                case V4L2_BUF_TYPE_VIDEO_OVERLAY:

                        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);

                        break;

                case V4L2_BUF_TYPE_VIDEO_CAPTURE:
                case V4L2_BUF_TYPE_VIDEO_OUTPUT:

                        mutex_lock(&zr->resource_lock);

                        if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE &&
                            fh->map_mode == ZORAN_MAP_MODE_RAW) {

                                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;

                        } else {

                                fmt->fmt.pix.width =
                                    fh->jpg_settings.img_width /
                                    fh->jpg_settings.HorDcm;
                                fmt->fmt.pix.height =
                                    fh->jpg_settings.img_height /
                                    (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_BT :
                                             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);

                        break;

                default:
                        dprintk(1,
                                KERN_ERR
                                "%s: VIDIOC_G_FMT - unsupported type %d\n",
                                ZR_DEVNAME(zr), fmt->type);
                        return -EINVAL;
                }
                return 0;
        }
                break;

        case VIDIOC_S_FMT:
        {
                struct v4l2_format *fmt = arg;
                int i, res = 0;
                __le32 printformat;

                dprintk(3, KERN_DEBUG "%s: VIDIOC_S_FMT - type=%d, ",
                        ZR_DEVNAME(zr), fmt->type);

                switch (fmt->type) {
                case V4L2_BUF_TYPE_VIDEO_OVERLAY:

                        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(file, fmt->fmt.win.w.left,
                                         fmt->fmt.win.w.top,
                                         fmt->fmt.win.w.width,
                                         fmt->fmt.win.w.height,
                                         (struct video_clip __user *)
                                           fmt->fmt.win.clips,
                                         fmt->fmt.win.clipcount,
                                         fmt->fmt.win.bitmap);
                        mutex_unlock(&zr->resource_lock);
                        return res;
                        break;

                case V4L2_BUF_TYPE_VIDEO_CAPTURE:
                case V4L2_BUF_TYPE_VIDEO_OUTPUT:

                        printformat =
                            __cpu_to_le32(fmt->fmt.pix.pixelformat);
                        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);

                        /* we can be requested to do JPEG/raw playback/capture */
                        if (!
                            (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
                             (fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT &&
                              fmt->fmt.pix.pixelformat ==
                              V4L2_PIX_FMT_MJPEG))) {
                                dprintk(1,
                                        KERN_ERR
                                        "%s: VIDIOC_S_FMT - unknown type %d/0x%x(%4.4s) combination\n",
                                        ZR_DEVNAME(zr), fmt->type,
                                        fmt->fmt.pix.pixelformat,
                                        (char *) &printformat);
                                return -EINVAL;
                        }

                        if (fmt->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG) {
                                mutex_lock(&zr->resource_lock);

                                settings = fh->jpg_settings;

                                if (fh->v4l_buffers.allocated ||
                                    fh->jpg_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;
                                }

                                /* 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;

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

                                /* it's ok, so set them */
                                fh->jpg_settings = 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);
                                fh->jpg_buffers.buffer_size =
                                    zoran_v4l2_calc_bufsize(&fh->
                                                            jpg_settings);
                                fmt->fmt.pix.bytesperline = 0;
                                fmt->fmt.pix.sizeimage =
                                    fh->jpg_buffers.buffer_size;

                                /* we hereby abuse this variable to show that
                                 * we're gonna do mjpeg capture */
                                fh->map_mode =
                                    (fmt->type ==
                                     V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
                                    ZORAN_MAP_MODE_JPG_REC :
                                    ZORAN_MAP_MODE_JPG_PLAY;
                        sfmtjpg_unlock_and_return:
                                mutex_unlock(&zr->resource_lock);
                        } else {
                                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 (%4.4s)\n",
                                                ZR_DEVNAME(zr),
                                                fmt->fmt.pix.pixelformat,
                                                (char *) &printformat);
                                        return -EINVAL;
                                }
                                mutex_lock(&zr->resource_lock);
                                if (fh->jpg_buffers.allocated ||
                                    (fh->v4l_buffers.allocated &&
                                     fh->v4l_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;

                                if ((res =
                                     zoran_v4l_set_format(file,
                                                          fmt->fmt.pix.
                                                          width,
                                                          fmt->fmt.pix.
                                                          height,
                                                          &zoran_formats
                                                          [i])))
                                        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;
                                if (BUZ_MAX_HEIGHT <
                                    (fh->v4l_settings.height * 2))
                                        fmt->fmt.pix.field =
                                            V4L2_FIELD_INTERLACED;
                                else
                                        fmt->fmt.pix.field =
                                            V4L2_FIELD_TOP;

                                fh->map_mode = ZORAN_MAP_MODE_RAW;
                        sfmtv4l_unlock_and_return:
                                mutex_unlock(&zr->resource_lock);
                        }

                        break;

                default:
                        dprintk(3, "unsupported\n");
                        dprintk(1,
                                KERN_ERR