/*
   * 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/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 <media/v4l2-event.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!?
  ",
  				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
  ",
  				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)
  ",
  			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
  ", 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!?
  ",
  				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
  ",
  				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
  ",
  					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
  ",
  						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
  ",
  		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
  ", 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)
  ",
  			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
  ",
  			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
  ",
  			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
  ",
  			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
  ",
  			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
  ",
  				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!?
  ",
  				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
  ",
  			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
  ",
  			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?
  ",
  			ZR_DEVNAME(zr), __func__);
  		return -EPROTO;
  	}
  
  	mutex_unlock(&zr->lock);
  	/* 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)) {
  		mutex_lock(&zr->lock);
  		return -ETIME;
  	}
  	mutex_lock(&zr->lock);
  	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
  ",
  			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
  ",
  			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
  ",
  			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
  ",
  			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
  ",
  				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!?
  ",
  				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
  ",
  					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
  ",
  				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
  ",
  			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
  ",
  			ZR_DEVNAME(zr), __func__);
  		return -EINVAL;
  	}
  	mutex_unlock(&zr->lock);
  	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);
  		mutex_lock(&zr->lock);
  		dprintk(1,
  			KERN_ERR
  			"%s: %s - timeout: codec isr=0x%02x
  ",
  			ZR_DEVNAME(zr), __func__, isr);
  
  		return -ETIME;
  
  	}
  	mutex_lock(&zr->lock);
  	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
  ",
  			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
  ",
  		ZR_DEVNAME(zr), __func__, current->comm, task_pid_nr(current), zr->user + 1);
  
  	mutex_lock(&zr->lock);
  
  	if (zr->user >= 2048) {
  		dprintk(1, KERN_ERR "%s: too many users (%d) on device
  ",
  			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
  ",
  			ZR_DEVNAME(zr), __func__);
  		res = -ENOMEM;
  		goto fail_unlock;
  	}
  	v4l2_fh_init(&fh->fh, video_devdata(file));
  
  	/* 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
  ",
  			ZR_DEVNAME(zr), __func__);
  		res = -ENOMEM;
  		goto fail_fh;
  	}
  
  	if (zr->user++ == 0)
  		first_open = 1;
  
  	/* 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);
  	v4l2_fh_add(&fh->fh);
  	mutex_unlock(&zr->lock);
  
  	return 0;
  
  fail_fh:
  	kfree(fh);
  fail_unlock:
  	mutex_unlock(&zr->lock);
  
  	dprintk(2, KERN_INFO "%s: open failed (%d), users(-)=%d
  ",
  		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
  ",
  		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->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->lock);
  
  	v4l2_fh_del(&fh->fh);
  	v4l2_fh_exit(&fh->fh);
  	kfree(fh->overlay_mask);
  	kfree(fh);
  
  	dprintk(4, KERN_INFO "%s: %s done
  ", ZR_DEVNAME(zr), __func__);
  
  	return 0;
  }
  
  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
  ",
  			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
  ",
  			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)
  ",
  			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
  ",
  			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,
  			unsigned 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
  ",
  			ZR_DEVNAME(zr), __func__);
  		return -EINVAL;
  	}
  
  	if (!fh->overlay_settings.format) {
  		dprintk(1,
  			KERN_ERR
  			"%s: %s - no overlay format set
  ",
  			ZR_DEVNAME(zr), __func__);
  		return -EINVAL;
  	}
  
  	if (clipcount > 2048) {
  		dprintk(1,
  			KERN_ERR
  			"%s: %s - invalid clipcount
  ",
  			 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
  ",
  			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) {
  		/* 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
  ",
  				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 immediately */
  	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
  ",
  			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
  ",
  			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
  ",
  				ZR_DEVNAME(zr), __func__);
  			return -EINVAL;
  		}
  		if (!fh->overlay_settings.format) {
  			dprintk(1,
  				KERN_ERR
  				"%s: %s - no overlay format set
  ",
  				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 | V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
  
  	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
  ",
  				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
  ",
  			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
  ",
  				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)
  ",
  			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
  ",
  			ZR_DEVNAME(zr), __func__);
  		return -EBUSY;
  	}
  
  	if (!(norm & zr->card.norms)) {
  		dprintk(1,
  			KERN_ERR "%s: %s - unsupported norm %llx
  ",
  			ZR_DEVNAME(zr), __func__, norm);
  		return -EINVAL;
  	}
  
  	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, video, 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
  ",
  			ZR_DEVNAME(zr), __func__);
  		return -EBUSY;
  	}
  
  	if (input < 0 || input >= zr->card.inputs) {
  		dprintk(1,
  			KERN_ERR
  			"%s: %s - unnsupported input %d
  ",
  			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;
  
  	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->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE |
  			   V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_VIDEO_OVERLAY;
  	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
  	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 needed */
  			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;
  
  	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;
  
  	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);
  
  	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;
  	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;
  
  	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;
  
  	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;
  
  	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;
  
  	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;
  
  	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)
  		return res;
  
  	/* 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;
  	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);
  
  	for (i = 0; i < NUM_FORMATS; i++)
  		if (zoran_formats[i].fourcc == fmt->fmt.pix.pixelformat)
  			break;
  
  	if (i == NUM_FORMATS)
  		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);
  	return 0;
  }
  
  static int zoran_s_fmt_vid_overlay(struct file *file, void *__fh,
  					struct v4l2_format *fmt)
  {
  	struct zoran_fh *fh = __fh;
  	int res;
  
  	dprintk(3, "x=%d, y=%d, w=%d, h=%d, cnt=%d, map=0x%p
  ",
  			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);
  	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);
  	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)
  ",
  			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;
  
  	if (fh->buffers.allocated) {
  		dprintk(1, KERN_ERR "%s: VIDIOC_S_FMT - cannot change capture mode
  ",
  			ZR_DEVNAME(zr));
  		res = -EBUSY;
  		return res;
  	}
  
  	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)
  		return res;
  
  	/* 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;
  	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
  ",
  			ZR_DEVNAME(zr), fmt->fmt.pix.pixelformat);
  		return -EINVAL;
  	}
  
  	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
  ",
  				ZR_DEVNAME(zr));
  		res = -EBUSY;
  		return res;
  	}
  	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)
  		return res;
  
  	/* 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;
  	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));
  	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;
  	fb->fmt.colorspace = V4L2_COLORSPACE_SRGB;
  	fb->fmt.field = V4L2_FIELD_INTERLACED;
  	fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
  
  	return 0;
  }
  
  static int zoran_s_fbuf(struct file *file, void *__fh,
  		const 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
  ",
  			ZR_DEVNAME(zr), fb->fmt.pixelformat,
  			(char *)&printformat);
  		return -EINVAL;
  	}
  
  	res = setup_fbuffer(fh, fb->base, &zoran_formats[i], fb->fmt.width,
  			    fb->fmt.height, fb->fmt.bytesperline);
  
  	return res;
  }
  
  static int zoran_overlay(struct file *file, void *__fh, unsigned int on)
  {
  	struct zoran_fh *fh = __fh;
  	int res;
  
  	res = setup_overlay(fh, on);
  
  	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
  ",
  				ZR_DEVNAME(zr), req->memory);
  		return -EINVAL;
  	}
  
  	if (req->count == 0)
  		return zoran_streamoff(file, fh, req->type);
  
  	if (fh->buffers.allocated) {
  		dprintk(2,
  				KERN_ERR
  				"%s: VIDIOC_REQBUFS - buffers already allocated
  ",
  				ZR_DEVNAME(zr));
  		res = -EBUSY;
  		return res;
  	}
  
  	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;
  			return res;
  		}
  	} 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;
  			return res;
  		}
  	} else {
  		dprintk(1,
  				KERN_ERR
  				"%s: VIDIOC_REQBUFS - unknown type %d
  ",
  				ZR_DEVNAME(zr), req->type);
  		res = -EINVAL;
  		return res;
  	}
  	return res;
  }
  
  static int zoran_querybuf(struct file *file, void *__fh, struct v4l2_buffer *buf)
  {
  	struct zoran_fh *fh = __fh;
  	int res;
  
  	res = zoran_v4l2_buffer_status(fh, buf, buf->index);
  
  	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;
  
  	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
  ",
  				ZR_DEVNAME(zr), buf->type, fh->map_mode);
  			res = -EINVAL;
  			return res;
  		}
  
  		res = zoran_v4l_queue_frame(fh, buf->index);
  		if (res)
  			return res;
  		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
  ",
  				ZR_DEVNAME(zr), buf->type, fh->map_mode);
  			res = -EINVAL;
  			return res;
  		}
  
  		res = zoran_jpg_queue_frame(fh, buf->index, codec_mode);
  		if (res != 0)
  			return res;
  		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
  ",
  			ZR_DEVNAME(zr), buf->type);
  		res = -EINVAL;
  		break;
  	}
  	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 (?) */
  
  	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
  ",
  				ZR_DEVNAME(zr), buf->type, fh->map_mode);
  			res = -EINVAL;
  			return res;
  		}
  
  		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;
  			return res;
  		}
  		res = v4l_sync(fh, num);
  		if (res)
  			return res;
  		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
  ",
  				ZR_DEVNAME(zr), buf->type, fh->map_mode);
  			res = -EINVAL;
  			return res;
  		}
  
  		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;
  			return res;
  		}
  		bs.frame = 0; /* suppress compiler warning */
  		res = jpg_sync(fh, &bs);
  		if (res)
  			return res;
  		res = zoran_v4l2_buffer_status(fh, buf, bs.frame);
  		break;
  	}
  
  	default:
  		dprintk(1, KERN_ERR
  			"%s: VIDIOC_DQBUF - unsupported type %d
  ",
  			ZR_DEVNAME(zr), buf->type);
  		res = -EINVAL;
  		break;
  	}
  	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;
  
  	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;
  			return res;
  		}
  
  		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;
  			return res;
  		}
  
  		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
  ",
  			ZR_DEVNAME(zr), fh->map_mode);
  		res = -EINVAL;
  		break;
  	}
  	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;
  
  	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! */
  			return res;
  		}
  		if (zr->v4l_buffers.active == ZORAN_FREE)
  			return res;
  
  		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! */
  			return res;
  		}
  		if (zr->jpg_buffers.active == ZORAN_FREE)
  			return res;
  
  		res = jpg_qbuf(fh, -1,
  			     (fh->map_mode == ZORAN_MAP_MODE_JPG_REC) ?
  			     BUZ_MODE_MOTION_COMPRESS :
  			     BUZ_MODE_MOTION_DECOMPRESS);
  		if (res)
  			return res;
  		break;
  	default:
  		dprintk(1, KERN_ERR
  			"%s: VIDIOC_STREAMOFF - invalid map mode %d
  ",
  			ZR_DEVNAME(zr), fh->map_mode);
  		res = -EINVAL;
  		break;
  	}
  	return res;
  }
  static int zoran_g_std(struct file *file, void *__fh, v4l2_std_id *std)
  {
  	struct zoran_fh *fh = __fh;
  	struct zoran *zr = fh->zr;
  
  	*std = zr->norm;
  	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;
  
  	res = zoran_set_norm(zr, std);
  	if (res)
  		return res;
  
  	res = wait_grab_pending(zr);
  	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 */
  	decoder_call(zr, video, g_input_status, &inp->status);
  	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;
  
  	*input = zr->input;
  
  	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;
  
  	res = zoran_set_input(zr, input);
  	if (res)
  		return res;
  
  	/* Make sure the changes come into effect */
  	res = wait_grab_pending(zr);
  	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;
  
  	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
  ",
  			ZR_DEVNAME(zr));
  		res = -EINVAL;
  		return res;
  	}
  
  	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;
  	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;
  
  	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
  ",
  			ZR_DEVNAME(zr));
  		res = -EINVAL;
  		return res;
  	}
  
  	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;
  	return res;
  }
  
  static int zoran_s_crop(struct file *file, void *__fh, const 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;
  
  	if (fh->buffers.allocated) {
  		dprintk(1, KERN_ERR
  			"%s: VIDIOC_S_CROP - cannot change settings while active
  ",
  			ZR_DEVNAME(zr));
  		res = -EBUSY;
  		return res;
  	}
  
  	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
  ",
  			ZR_DEVNAME(zr));
  		res = -EINVAL;
  		return res;
  	}
  
  	/* 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)
  		return res;
  
  	/* accept */
  	fh->jpg_settings = settings;
  	return res;
  }
  
  static int zoran_g_jpegcomp(struct file *file, void *__fh,
  					struct v4l2_jpegcompression *params)
  {
  	struct zoran_fh *fh = __fh;
  	memset(params, 0, sizeof(*params));
  
  	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;
  
  	return 0;
  }
  
  static int zoran_s_jpegcomp(struct file *file, void *__fh,
  					const 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;
  
  	if (fh->buffers.active != ZORAN_FREE) {
  		dprintk(1, KERN_WARNING
  			"%s: VIDIOC_S_JPEGCOMP called while in playback/capture mode
  ",
  			ZR_DEVNAME(zr));
  		res = -EBUSY;
  		return res;
  	}
  
  	res = zoran_check_jpg_settings(zr, &settings, 0);
  	if (res)
  		return res;
  	if (!fh->buffers.allocated)
  		fh->buffers.buffer_size =
  			zoran_v4l2_calc_bufsize(&fh->jpg_settings);
  	fh->jpg_settings.jpg_comp = settings.jpg_comp;
  	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 = v4l2_ctrl_poll(file, wait);
  	int 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
  	 */
  
  	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
  ",
  			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
  ",
  			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
  ",
  			ZR_DEVNAME(zr), __func__, fh->map_mode);
  		res |= POLLERR;
  	}
  
  	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;
  	atomic_inc(&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->fh;
  	struct zoran *zr = fh->zr;
  	int i;
  
  	dprintk(3, KERN_INFO "%s: %s - munmap(%s)
  ", 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
  ", ZR_DEVNAME(zr),
  		__func__, mode_name(fh->map_mode));
  
  	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);
  	}
  }
  
  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)
  ",
  		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
  ",
  			ZR_DEVNAME(zr), __func__);
  		return -EINVAL;
  	}
  
  	if (!fh->buffers.allocated) {
  		dprintk(1,
  			KERN_ERR
  			"%s: %s(%s) - buffers not yet allocated
  ",
  			ZR_DEVNAME(zr), __func__, mode_name(fh->map_mode));
  		res = -ENOMEM;
  		return res;
  	}
  
  	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
  ",
  			ZR_DEVNAME(zr), __func__, mode_name(fh->map_mode), offset, size,
  			fh->buffers.buffer_size,
  			fh->buffers.num_buffers);
  		res = -EINVAL;
  		return res;
  	}
  
  	/* 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
  ",
  				ZR_DEVNAME(zr), __func__, mode_name(fh->map_mode), i);
  			res = -EBUSY;
  			return res;
  		}
  	}
  
  	/* map these buffers */
  	map = kmalloc(sizeof(struct zoran_mapping), GFP_KERNEL);
  	if (!map) {
  		res = -ENOMEM;
  		return res;
  	}
  	map->fh = fh;
  	atomic_set(&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
  ",
  					ZR_DEVNAME(zr), __func__);
  				res = -EAGAIN;
  				return res;
  			}
  			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
  ",
  						ZR_DEVNAME(zr), __func__);
  					res = -EAGAIN;
  					return res;
  				}
  				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;
  
  		}
  	}
  	return res;
  }
  
  static const struct v4l2_ioctl_ops zoran_ioctl_ops = {
  	.vidioc_querycap    		    = zoran_querycap,
  	.vidioc_cropcap       		    = zoran_cropcap,
  	.vidioc_s_crop       		    = zoran_s_crop,
  	.vidioc_g_crop       		    = zoran_g_crop,
  	.vidioc_enum_input     		    = zoran_enum_input,
  	.vidioc_g_input      		    = zoran_g_input,
  	.vidioc_s_input      		    = zoran_s_input,
  	.vidioc_enum_output    		    = zoran_enum_output,
  	.vidioc_g_output     		    = zoran_g_output,
  	.vidioc_s_output     		    = zoran_s_output,
  	.vidioc_g_fbuf			    = zoran_g_fbuf,
  	.vidioc_s_fbuf			    = zoran_s_fbuf,
  	.vidioc_g_std 			    = zoran_g_std,
  	.vidioc_s_std 			    = zoran_s_std,
  	.vidioc_g_jpegcomp 		    = zoran_g_jpegcomp,
  	.vidioc_s_jpegcomp 		    = zoran_s_jpegcomp,
  	.vidioc_overlay			    = zoran_overlay,
  	.vidioc_reqbufs			    = zoran_reqbufs,
  	.vidioc_querybuf		    = zoran_querybuf,
  	.vidioc_qbuf			    = zoran_qbuf,
  	.vidioc_dqbuf			    = zoran_dqbuf,
  	.vidioc_streamon		    = zoran_streamon,
  	.vidioc_streamoff		    = zoran_streamoff,
  	.vidioc_enum_fmt_vid_cap 	    = zoran_enum_fmt_vid_cap,
  	.vidioc_enum_fmt_vid_out 	    = zoran_enum_fmt_vid_out,
  	.vidioc_enum_fmt_vid_overlay 	    = zoran_enum_fmt_vid_overlay,
  	.vidioc_g_fmt_vid_cap 		    = zoran_g_fmt_vid_cap,
  	.vidioc_g_fmt_vid_out               = zoran_g_fmt_vid_out,
  	.vidioc_g_fmt_vid_overlay           = zoran_g_fmt_vid_overlay,
  	.vidioc_s_fmt_vid_cap  		    = zoran_s_fmt_vid_cap,
  	.vidioc_s_fmt_vid_out               = zoran_s_fmt_vid_out,
  	.vidioc_s_fmt_vid_overlay           = zoran_s_fmt_vid_overlay,
  	.vidioc_try_fmt_vid_cap  	    = zoran_try_fmt_vid_cap,
  	.vidioc_try_fmt_vid_out 	    = zoran_try_fmt_vid_out,
  	.vidioc_try_fmt_vid_overlay 	    = zoran_try_fmt_vid_overlay,
  	.vidioc_subscribe_event             = v4l2_ctrl_subscribe_event,
  	.vidioc_unsubscribe_event           = v4l2_event_unsubscribe,
  };
  
  static const struct v4l2_file_operations zoran_fops = {
  	.owner = THIS_MODULE,
  	.open = zoran_open,
  	.release = zoran_close,
  	.unlocked_ioctl = video_ioctl2,
  	.mmap = zoran_mmap,
  	.poll = zoran_poll,
  };
  
  struct video_device zoran_template = {
  	.name = ZORAN_NAME,
  	.fops = &zoran_fops,
  	.ioctl_ops = &zoran_ioctl_ops,
  	.release = &zoran_vdev_release,
  	.tvnorms = V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM,
  };