/*
 * 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>

#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include "videocodec.h"

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

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


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

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

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

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

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

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

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

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

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

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

        fh->buffers.allocated = 1;

        return 0;
}

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

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

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

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

        fh->buffers.allocated = 0;
}

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

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

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

                /* Allocate fragment table for this buffer */

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

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

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

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

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

        fh->buffers.allocated = 1;

        return 0;
}

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

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

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

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

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

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

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

        fh->buffers.allocated = 0;
}

/*
 *   V4L Buffer grabbing
 */

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

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

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

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

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

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

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

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

        return 0;
}

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

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

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

        spin_lock_irqsave(&zr->spinlock, flags);

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

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

        spin_unlock_irqrestore(&zr->spinlock, flags);

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

        return res;
}

/*
 * Sync on a V4L buffer
 */

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

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

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

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

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

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

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

        spin_lock_irqsave(&zr->spinlock, flags);

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

        spin_unlock_irqrestore(&zr->spinlock, flags);

        return 0;
}

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

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

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

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

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

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

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

        spin_lock_irqsave(&zr->spinlock, flags);

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

        spin_unlock_irqrestore(&zr->spinlock, flags);

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

        return res;
}

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

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

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

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

        return res;
}

/*
 *   Sync on a MJPEG buffer
 */

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

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

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

                return -ETIME;

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

        spin_lock_irqsave(&zr->spinlock, flags);

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

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

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

        spin_unlock_irqrestore(&zr->spinlock, flags);

        return 0;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

        mutex_lock(&zr->other_lock);

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

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

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

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

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

                btor(ZR36057_ICR_IntPinEn, ZR36057_ICR);
        }

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

        return 0;

fail_fh:
        kfree(fh);
fail_unlock:
        mutex_unlock(&zr->other_lock);

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

        return res;
}

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

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

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

        zoran_close_end_session(fh);

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

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

                if (zr36067_debug > 1)
                        print_interrupts(zr);

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

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

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

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

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

        return 0;
}


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

        return -EINVAL;
}

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

        return -EINVAL;
}

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

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

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

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

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

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

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

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

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

        return 0;
}


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


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

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

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

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

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

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

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

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

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

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

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

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

        if (on)
                zr36057_overlay(zr, 1);

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

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

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

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

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

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

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

        buf->flags = V4L2_BUF_FLAG_MAPPED;

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

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

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

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

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

                break;

        case ZORAN_MAP_MODE_JPG_REC:
        case ZORAN_MAP_MODE_JPG_PLAY:

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

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

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

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

                break;

        default:

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

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

        return 0;
}

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

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

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

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

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

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

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

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

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

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

        if (on)
                zr36057_overlay(zr, 1);

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

        return 0;
}

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

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

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

        zr->input = input;

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

        return 0;
}

/*
 *   ioctl routine
 */

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

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

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

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

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

        return zoran_enum_fmt(zr, f, ZORAN_FORMAT_CAPTURE);
}

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

        return zoran_enum_fmt(zr, f, ZORAN_FORMAT_PLAYBACK);
}

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

        return zoran_enum_fmt(zr, f, ZORAN_FORMAT_OVERLAY);
}

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

        mutex_lock(&zr->resource_lock);

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

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

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

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

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

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

        mutex_lock(&zr->resource_lock);

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

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

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

        mutex_lock(&zr->resource_lock);

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

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

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

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

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

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

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

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

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

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

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

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

        mutex_lock(&zr->resource_lock);

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

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

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

        return 0;
}

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

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

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

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

        mutex_lock(&zr->resource_lock);

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

        settings = fh->jpg_settings;

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

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

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

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

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

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

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

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

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

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

        mutex_lock(&zr->resource_lock);

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

        map_mode_raw(fh);

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

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

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

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

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

        return 0;
}

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

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

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

        return res;
}

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

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

        return res;
}

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

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

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

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

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

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

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

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

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

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

        return res;
}

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

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

        return res;
}

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

        mutex_lock(&zr->resource_lock);

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

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

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

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

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

                break;

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

        return res;
}

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

        mutex_lock(&zr->resource_lock);

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

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

        case ZORAN_MAP_MODE_JPG_REC:
        case ZORAN_MAP_MODE_JPG_PLAY:
        {
                struct zoran_sync bs;

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

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

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

                if (file->f_flags & O_NONBLOCK &&
                    zr->jpg_buffers.buffer[num].state != BUZ_STATE_DONE) {
                        res = -EAGAIN;
                        goto dqbuf_unlock_and_return;
                }
                bs.frame = 0; /* suppress compiler warning */
                res = jpg_sync(fh, &bs);
                if (res)
                        goto dqbuf_unlock_and_return;
                res = zoran_v4l2_buffer_status(fh, buf, bs.frame);
                break;
        }

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

        return res;
}

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

        mutex_lock(&zr->resource_lock);

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

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

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

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

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

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

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

        return res;
}

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

        mutex_lock(&zr->resource_lock);

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

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

                        zr36057_set_memgrab(zr, 0);
                }

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

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

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

                spin_unlock_irqrestore(&zr->spinlock, flags);

                break;

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

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

        return res;
}

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

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

        decoder_call(zr, core, queryctrl, ctrl);

        return 0;
}

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

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

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

        return 0;
}

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

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

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

        return 0;
}

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

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

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

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

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

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

        if (inp->index >= zr->card.inputs)
                return -EINVAL;

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

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

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

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

        return 0;
}

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

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

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

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

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

        return 0;
}

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

        return 0;
}

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

        return 0;
}

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

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

        mutex_lock(&zr->resource_lock);

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

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

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

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

        mutex_lock(&zr->resource_lock);

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

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

gcrop_unlock_and_return:
        mutex_unlock(&zr->resource_lock);

        return res;
}

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

        settings = fh->jpg_settings;

        mutex_lock(&zr->resource_lock);

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

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

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

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

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

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

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

        mutex_lock(&zr->resource_lock);

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

        mutex_unlock(&zr->resource_lock);

        return 0;
}

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

        settings = fh->jpg_settings;

        settings.jpg_comp = *params;

        mutex_lock(&zr->resource_lock);

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

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

        return res;
}

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

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

        mutex_lock(&zr->resource_lock);

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

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

                break;

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

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

                break;

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

        mutex_unlock(&zr->resource_lock);

        return res;
}


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

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

        map->count++;
}

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

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

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

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

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

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

        mutex_lock(&zr->resource_lock);

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

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

        mutex_unlock(&zr->resource_lock);
}

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

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

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

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

        mutex_lock(&zr->resource_lock);

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

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

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

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

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

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

                }
        }

mmap_unlock_and_return: