Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1785 insertions, 0 deletions

diff --git a/drivers/media/video/zoran_device.c b/drivers/media/video/zoran_device.c
new file mode 100644
index 000000000000..4e15afdec4c9
--- /dev/null
+++ b/drivers/media/video/zoran_device.c
@@ -0,0 +1,1785 @@
+/*
+ * Zoran zr36057/zr36067 PCI controller driver, for the
+ * Pinnacle/Miro DC10/DC10+/DC30/DC30+, Iomega Buz, Linux
+ * Media Labs LML33/LML33R10.
+ *
+ * This part handles device access (PCI/I2C/codec/...)
+ * 
+ * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
+ *
+ * Currently maintained by:
+ *   Ronald Bultje    <rbultje@ronald.bitfreak.net>
+ *   Laurent Pinchart <laurent.pinchart@skynet.be>
+ *   Mailinglist      <mjpeg-users@lists.sf.net>
+ *
+ * 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/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+#include <linux/byteorder/generic.h>
+
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/i2c.h>
+#include <linux/i2c-algo-bit.h>
+#include <linux/videodev.h>
+#include <linux/spinlock.h>
+#include <linux/sem.h>
+
+#include <linux/pci.h>
+#include <linux/video_decoder.h>
+#include <linux/video_encoder.h>
+#include <linux/delay.h>
+#include <linux/wait.h>
+
+#include <asm/io.h>
+
+#include "videocodec.h"
+#include "zoran.h"
+#include "zoran_device.h"
+
+#define IRQ_MASK ( ZR36057_ISR_GIRQ0 | \
+		   ZR36057_ISR_GIRQ1 | \
+		   ZR36057_ISR_JPEGRepIRQ )
+
+extern const struct zoran_format zoran_formats[];
+
+extern int *zr_debug;
+
+#define dprintk(num, format, args...) \
+	do { \
+		if (*zr_debug >= num) \
+			printk(format, ##args); \
+	} while (0)
+
+static int lml33dpath = 0;	/* 1 will use digital path in capture
+				 * mode instead of analog. It can be
+				 * used for picture adjustments using
+				 * tool like xawtv while watching image
+				 * on TV monitor connected to the output.
+				 * However, due to absence of 75 Ohm
+				 * load on Bt819 input, there will be
+				 * some image imperfections */
+
+module_param(lml33dpath, bool, 0);
+MODULE_PARM_DESC(lml33dpath,
+		 "Use digital path capture mode (on LML33 cards)");
+
+static void
+zr36057_init_vfe (struct zoran *zr);
+
+/*
+ * General Purpose I/O and Guest bus access
+ */
+
+/*
+ * This is a bit tricky. When a board lacks a GPIO function, the corresponding
+ * GPIO bit number in the card_info structure is set to 0.
+ */
+
+void
+GPIO (struct zoran *zr,
+      int           bit,
+      unsigned int  value)
+{
+	u32 reg;
+	u32 mask;
+
+	/* Make sure the bit number is legal
+	 * A bit number of -1 (lacking) gives a mask of 0,
+	 * making it harmless */
+	mask = (1 << (24 + bit)) & 0xff000000;
+	reg = btread(ZR36057_GPPGCR1) & ~mask;
+	if (value) {
+		reg |= mask;
+	}
+	btwrite(reg, ZR36057_GPPGCR1);
+	udelay(1);
+}
+
+/*
+ * Wait til post office is no longer busy
+ */
+
+int
+post_office_wait (struct zoran *zr)
+{
+	u32 por;
+
+//      while (((por = btread(ZR36057_POR)) & (ZR36057_POR_POPen | ZR36057_POR_POTime)) == ZR36057_POR_POPen) {
+	while ((por = btread(ZR36057_POR)) & ZR36057_POR_POPen) {
+		/* wait for something to happen */
+	}
+	if ((por & ZR36057_POR_POTime) && !zr->card.gws_not_connected) {
+		/* In LML33/BUZ \GWS line is not connected, so it has always timeout set */
+		dprintk(1, KERN_INFO "%s: pop timeout %08x\n", ZR_DEVNAME(zr),
+			por);
+		return -1;
+	}
+
+	return 0;
+}
+
+int
+post_office_write (struct zoran *zr,
+		   unsigned int  guest,
+		   unsigned int  reg,
+		   unsigned int  value)
+{
+	u32 por;
+
+	por =
+	    ZR36057_POR_PODir | ZR36057_POR_POTime | ((guest & 7) << 20) |
+	    ((reg & 7) << 16) | (value & 0xFF);
+	btwrite(por, ZR36057_POR);
+
+	return post_office_wait(zr);
+}
+
+int
+post_office_read (struct zoran *zr,
+		  unsigned int  guest,
+		  unsigned int  reg)
+{
+	u32 por;
+
+	por = ZR36057_POR_POTime | ((guest & 7) << 20) | ((reg & 7) << 16);
+	btwrite(por, ZR36057_POR);
+	if (post_office_wait(zr) < 0) {
+		return -1;
+	}
+
+	return btread(ZR36057_POR) & 0xFF;
+}
+
+/*
+ * detect guests
+ */
+
+static void
+dump_guests (struct zoran *zr)
+{
+	if (*zr_debug > 2) {
+		int i, guest[8];
+
+		for (i = 1; i < 8; i++) {	// Don't read jpeg codec here
+			guest[i] = post_office_read(zr, i, 0);
+		}
+
+		printk(KERN_INFO "%s: Guests:", ZR_DEVNAME(zr));
+
+		for (i = 1; i < 8; i++) {
+			printk(" 0x%02x", guest[i]);
+		}
+		printk("\n");
+	}
+}
+
+static inline unsigned long
+get_time (void)
+{
+	struct timeval tv;
+
+	do_gettimeofday(&tv);
+	return (1000000 * tv.tv_sec + tv.tv_usec);
+}
+
+void
+detect_guest_activity (struct zoran *zr)
+{
+	int timeout, i, j, res, guest[8], guest0[8], change[8][3];
+	unsigned long t0, t1;
+
+	dump_guests(zr);
+	printk(KERN_INFO "%s: Detecting guests activity, please wait...\n",
+	       ZR_DEVNAME(zr));
+	for (i = 1; i < 8; i++) {	// Don't read jpeg codec here
+		guest0[i] = guest[i] = post_office_read(zr, i, 0);
+	}
+
+	timeout = 0;
+	j = 0;
+	t0 = get_time();
+	while (timeout < 10000) {
+		udelay(10);
+		timeout++;
+		for (i = 1; (i < 8) && (j < 8); i++) {
+			res = post_office_read(zr, i, 0);
+			if (res != guest[i]) {
+				t1 = get_time();
+				change[j][0] = (t1 - t0);
+				t0 = t1;
+				change[j][1] = i;
+				change[j][2] = res;
+				j++;
+				guest[i] = res;
+			}
+		}
+		if (j >= 8)
+			break;
+	}
+	printk(KERN_INFO "%s: Guests:", ZR_DEVNAME(zr));
+
+	for (i = 1; i < 8; i++) {
+		printk(" 0x%02x", guest0[i]);
+	}
+	printk("\n");
+	if (j == 0) {
+		printk(KERN_INFO "%s: No activity detected.\n", ZR_DEVNAME(zr));
+		return;
+	}
+	for (i = 0; i < j; i++) {
+		printk(KERN_INFO "%s: %6d: %d => 0x%02x\n", ZR_DEVNAME(zr),
+		       change[i][0], change[i][1], change[i][2]);
+	}
+}
+
+/*
+ * JPEG Codec access
+ */
+
+void
+jpeg_codec_sleep (struct zoran *zr,
+		  int           sleep)
+{
+	GPIO(zr, zr->card.gpio[GPIO_JPEG_SLEEP], !sleep);
+	if (!sleep) {
+		dprintk(3,
+			KERN_DEBUG
+			"%s: jpeg_codec_sleep() - wake GPIO=0x%08x\n",
+			ZR_DEVNAME(zr), btread(ZR36057_GPPGCR1));
+		udelay(500);
+	} else {
+		dprintk(3,
+			KERN_DEBUG
+			"%s: jpeg_codec_sleep() - sleep GPIO=0x%08x\n",
+			ZR_DEVNAME(zr), btread(ZR36057_GPPGCR1));
+		udelay(2);
+	}
+}
+
+int
+jpeg_codec_reset (struct zoran *zr)
+{
+	/* Take the codec out of sleep */
+	jpeg_codec_sleep(zr, 0);
+
+	if (zr->card.gpcs[GPCS_JPEG_RESET] != 0xff) {
+		post_office_write(zr, zr->card.gpcs[GPCS_JPEG_RESET], 0,
+				  0);
+		udelay(2);
+	} else {
+		GPIO(zr, zr->card.gpio[GPIO_JPEG_RESET], 0);
+		udelay(2);
+		GPIO(zr, zr->card.gpio[GPIO_JPEG_RESET], 1);
+		udelay(2);
+	}
+
+	return 0;
+}
+
+/*
+ *   Set the registers for the size we have specified. Don't bother
+ *   trying to understand this without the ZR36057 manual in front of
+ *   you [AC].
+ *
+ *   PS: The manual is free for download in .pdf format from
+ *   www.zoran.com - nicely done those folks.
+ */
+
+static void
+zr36057_adjust_vfe (struct zoran          *zr,
+		    enum zoran_codec_mode  mode)
+{
+	u32 reg;
+
+	switch (mode) {
+	case BUZ_MODE_MOTION_DECOMPRESS:
+		btand(~ZR36057_VFESPFR_ExtFl, ZR36057_VFESPFR);
+		reg = btread(ZR36057_VFEHCR);
+		if ((reg & (1 << 10)) && zr->card.type != LML33R10) {
+			reg += ((1 << 10) | 1);
+		}
+		btwrite(reg, ZR36057_VFEHCR);
+		break;
+	case BUZ_MODE_MOTION_COMPRESS:
+	case BUZ_MODE_IDLE:
+	default:
+		if (zr->norm == VIDEO_MODE_NTSC ||
+		    (zr->card.type == LML33R10 &&
+		     zr->norm == VIDEO_MODE_PAL))
+			btand(~ZR36057_VFESPFR_ExtFl, ZR36057_VFESPFR);
+		else
+			btor(ZR36057_VFESPFR_ExtFl, ZR36057_VFESPFR);
+		reg = btread(ZR36057_VFEHCR);
+		if (!(reg & (1 << 10)) && zr->card.type != LML33R10) {
+			reg -= ((1 << 10) | 1);
+		}
+		btwrite(reg, ZR36057_VFEHCR);
+		break;
+	}
+}
+
+/*
+ * set geometry
+ */
+
+static void
+zr36057_set_vfe (struct zoran              *zr,
+		 int                        video_width,
+		 int                        video_height,
+		 const struct zoran_format *format)
+{
+	struct tvnorm *tvn;
+	unsigned HStart, HEnd, VStart, VEnd;
+	unsigned DispMode;
+	unsigned VidWinWid, VidWinHt;
+	unsigned hcrop1, hcrop2, vcrop1, vcrop2;
+	unsigned Wa, We, Ha, He;
+	unsigned X, Y, HorDcm, VerDcm;
+	u32 reg;
+	unsigned mask_line_size;
+
+	tvn = zr->timing;
+
+	Wa = tvn->Wa;
+	Ha = tvn->Ha;
+
+	dprintk(2, KERN_INFO "%s: set_vfe() - width = %d, height = %d\n",
+		ZR_DEVNAME(zr), video_width, video_height);
+
+	if (zr->norm != VIDEO_MODE_PAL &&
+	    zr->norm != VIDEO_MODE_NTSC &&
+	    zr->norm != VIDEO_MODE_SECAM) {
+		dprintk(1,
+			KERN_ERR "%s: set_vfe() - norm = %d not valid\n",
+			ZR_DEVNAME(zr), zr->norm);
+		return;
+	}
+	if (video_width < BUZ_MIN_WIDTH ||
+	    video_height < BUZ_MIN_HEIGHT ||
+	    video_width > Wa || video_height > Ha) {
+		dprintk(1, KERN_ERR "%s: set_vfe: w=%d h=%d not valid\n",
+			ZR_DEVNAME(zr), video_width, video_height);
+		return;
+	}
+
+	/**** zr36057 ****/
+
+	/* horizontal */
+	VidWinWid = video_width;
+	X = (VidWinWid * 64 + tvn->Wa - 1) / tvn->Wa;
+	We = (VidWinWid * 64) / X;
+	HorDcm = 64 - X;
+	hcrop1 = 2 * ((tvn->Wa - We) / 4);
+	hcrop2 = tvn->Wa - We - hcrop1;
+	HStart = tvn->HStart ? tvn->HStart : 1;
+	/* (Ronald) Original comment:
+	 * "| 1 Doesn't have any effect, tested on both a DC10 and a DC10+"
+	 * this is false. It inverses chroma values on the LML33R10 (so Cr
+	 * suddenly is shown as Cb and reverse, really cool effect if you
+	 * want to see blue faces, not useful otherwise). So don't use |1.
+	 * However, the DC10 has '0' as HStart, but does need |1, so we
+	 * use a dirty check...
+	 */
+	HEnd = HStart + tvn->Wa - 1;
+	HStart += hcrop1;
+	HEnd -= hcrop2;
+	reg = ((HStart & ZR36057_VFEHCR_Hmask) << ZR36057_VFEHCR_HStart)
+	    | ((HEnd & ZR36057_VFEHCR_Hmask) << ZR36057_VFEHCR_HEnd);
+	if (zr->card.vfe_pol.hsync_pol)
+		reg |= ZR36057_VFEHCR_HSPol;
+	btwrite(reg, ZR36057_VFEHCR);
+
+	/* Vertical */
+	DispMode = !(video_height > BUZ_MAX_HEIGHT / 2);
+	VidWinHt = DispMode ? video_height : video_height / 2;
+	Y = (VidWinHt * 64 * 2 + tvn->Ha - 1) / tvn->Ha;
+	He = (VidWinHt * 64) / Y;
+	VerDcm = 64 - Y;
+	vcrop1 = (tvn->Ha / 2 - He) / 2;
+	vcrop2 = tvn->Ha / 2 - He - vcrop1;
+	VStart = tvn->VStart;
+	VEnd = VStart + tvn->Ha / 2;	// - 1; FIXME SnapShot times out with -1 in 768*576 on the DC10 - LP
+	VStart += vcrop1;
+	VEnd -= vcrop2;
+	reg = ((VStart & ZR36057_VFEVCR_Vmask) << ZR36057_VFEVCR_VStart)
+	    | ((VEnd & ZR36057_VFEVCR_Vmask) << ZR36057_VFEVCR_VEnd);
+	if (zr->card.vfe_pol.vsync_pol)
+		reg |= ZR36057_VFEVCR_VSPol;
+	btwrite(reg, ZR36057_VFEVCR);
+
+	/* scaler and pixel format */
+	reg = 0;
+	reg |= (HorDcm << ZR36057_VFESPFR_HorDcm);
+	reg |= (VerDcm << ZR36057_VFESPFR_VerDcm);
+	reg |= (DispMode << ZR36057_VFESPFR_DispMode);
+	if (format->palette != VIDEO_PALETTE_YUV422)
+		reg |= ZR36057_VFESPFR_LittleEndian;
+	/* RJ: I don't know, why the following has to be the opposite
+	 * of the corresponding ZR36060 setting, but only this way
+	 * we get the correct colors when uncompressing to the screen  */
+	//reg |= ZR36057_VFESPFR_VCLKPol; /**/
+	/* RJ: Don't know if that is needed for NTSC also */
+	if (zr->norm != VIDEO_MODE_NTSC)
+		reg |= ZR36057_VFESPFR_ExtFl;	// NEEDED!!!!!!! Wolfgang
+	reg |= ZR36057_VFESPFR_TopField;
+	switch (format->palette) {
+
+	case VIDEO_PALETTE_YUV422:
+		reg |= ZR36057_VFESPFR_YUV422;
+		break;
+
+	case VIDEO_PALETTE_RGB555:
+		reg |= ZR36057_VFESPFR_RGB555 | ZR36057_VFESPFR_ErrDif;
+		break;
+
+	case VIDEO_PALETTE_RGB565:
+		reg |= ZR36057_VFESPFR_RGB565 | ZR36057_VFESPFR_ErrDif;
+		break;
+
+	case VIDEO_PALETTE_RGB24:
+		reg |= ZR36057_VFESPFR_RGB888 | ZR36057_VFESPFR_Pack24;
+		break;
+
+	case VIDEO_PALETTE_RGB32:
+		reg |= ZR36057_VFESPFR_RGB888;
+		break;
+
+	default:
+		dprintk(1,
+			KERN_INFO "%s: set_vfe() - unknown color_fmt=%x\n",
+			ZR_DEVNAME(zr), format->palette);
+		return;
+
+	}
+	if (HorDcm >= 48) {
+		reg |= 3 << ZR36057_VFESPFR_HFilter;	/* 5 tap filter */
+	} else if (HorDcm >= 32) {
+		reg |= 2 << ZR36057_VFESPFR_HFilter;	/* 4 tap filter */
+	} else if (HorDcm >= 16) {
+		reg |= 1 << ZR36057_VFESPFR_HFilter;	/* 3 tap filter */
+	}
+	btwrite(reg, ZR36057_VFESPFR);
+
+	/* display configuration */
+	reg = (16 << ZR36057_VDCR_MinPix)
+	    | (VidWinHt << ZR36057_VDCR_VidWinHt)
+	    | (VidWinWid << ZR36057_VDCR_VidWinWid);
+	if (pci_pci_problems & PCIPCI_TRITON)
+		// || zr->revision < 1) // Revision 1 has also Triton support
+		reg &= ~ZR36057_VDCR_Triton;
+	else
+		reg |= ZR36057_VDCR_Triton;
+	btwrite(reg, ZR36057_VDCR);
+
+	/* (Ronald) don't write this if overlay_mask = NULL */
+	if (zr->overlay_mask) {
+		/* Write overlay clipping mask data, but don't enable overlay clipping */
+		/* RJ: since this makes only sense on the screen, we use 
+		 * zr->overlay_settings.width instead of video_width */
+
+		mask_line_size = (BUZ_MAX_WIDTH + 31) / 32;
+		reg = virt_to_bus(zr->overlay_mask);
+		btwrite(reg, ZR36057_MMTR);
+		reg = virt_to_bus(zr->overlay_mask + mask_line_size);
+		btwrite(reg, ZR36057_MMBR);
+		reg =
+		    mask_line_size - (zr->overlay_settings.width +
+				      31) / 32;
+		if (DispMode == 0)
+			reg += mask_line_size;
+		reg <<= ZR36057_OCR_MaskStride;
+		btwrite(reg, ZR36057_OCR);
+	}
+
+	zr36057_adjust_vfe(zr, zr->codec_mode);
+}
+
+/*
+ * Switch overlay on or off
+ */
+
+void
+zr36057_overlay (struct zoran *zr,
+		 int           on)
+{
+	u32 reg;
+
+	if (on) {
+		/* do the necessary settings ... */
+		btand(~ZR36057_VDCR_VidEn, ZR36057_VDCR);	/* switch it off first */
+
+		zr36057_set_vfe(zr,
+				zr->overlay_settings.width,
+				zr->overlay_settings.height,
+				zr->overlay_settings.format);
+
+		/* Start and length of each line MUST be 4-byte aligned.
+		 * This should be allready checked before the call to this routine.
+		 * All error messages are internal driver checking only! */
+
+		/* video display top and bottom registers */
+		reg = (u32) zr->buffer.base +
+		    zr->overlay_settings.x *
+		    ((zr->overlay_settings.format->depth + 7) / 8) +
+		    zr->overlay_settings.y *
+		    zr->buffer.bytesperline;
+		btwrite(reg, ZR36057_VDTR);
+		if (reg & 3)
+			dprintk(1,
+				KERN_ERR
+				"%s: zr36057_overlay() - video_address not aligned\n",
+				ZR_DEVNAME(zr));
+		if (zr->overlay_settings.height > BUZ_MAX_HEIGHT / 2)
+			reg += zr->buffer.bytesperline;
+		btwrite(reg, ZR36057_VDBR);
+
+		/* video stride, status, and frame grab register */
+		reg = zr->buffer.bytesperline -
+		    zr->overlay_settings.width *
+		    ((zr->overlay_settings.format->depth + 7) / 8);
+		if (zr->overlay_settings.height > BUZ_MAX_HEIGHT / 2)
+			reg += zr->buffer.bytesperline;
+		if (reg & 3)
+			dprintk(1,
+				KERN_ERR
+				"%s: zr36057_overlay() - video_stride not aligned\n",
+				ZR_DEVNAME(zr));
+		reg = (reg << ZR36057_VSSFGR_DispStride);
+		reg |= ZR36057_VSSFGR_VidOvf;	/* clear overflow status */
+		btwrite(reg, ZR36057_VSSFGR);
+
+		/* Set overlay clipping */
+		if (zr->overlay_settings.clipcount > 0)
+			btor(ZR36057_OCR_OvlEnable, ZR36057_OCR);
+
+		/* ... and switch it on */
+		btor(ZR36057_VDCR_VidEn, ZR36057_VDCR);
+	} else {
+		/* Switch it off */
+		btand(~ZR36057_VDCR_VidEn, ZR36057_VDCR);
+	}
+}
+
+/*
+ * The overlay mask has one bit for each pixel on a scan line,
+ *  and the maximum window size is BUZ_MAX_WIDTH * BUZ_MAX_HEIGHT pixels.
+ */
+
+void
+write_overlay_mask (struct file       *file,
+		    struct video_clip *vp,
+		    int                count)
+{
+	struct zoran_fh *fh = file->private_data;
+	struct zoran *zr = fh->zr;
+	unsigned mask_line_size = (BUZ_MAX_WIDTH + 31) / 32;
+	u32 *mask;
+	int x, y, width, height;
+	unsigned i, j, k;
+	u32 reg;
+
+	/* fill mask with one bits */
+	memset(fh->overlay_mask, ~0, mask_line_size * 4 * BUZ_MAX_HEIGHT);
+	reg = 0;
+
+	for (i = 0; i < count; ++i) {
+		/* pick up local copy of clip */
+		x = vp[i].x;
+		y = vp[i].y;
+		width = vp[i].width;
+		height = vp[i].height;
+
+		/* trim clips that extend beyond the window */
+		if (x < 0) {
+			width += x;
+			x = 0;
+		}
+		if (y < 0) {
+			height += y;
+			y = 0;
+		}
+		if (x + width > fh->overlay_settings.width) {
+			width = fh->overlay_settings.width - x;
+		}
+		if (y + height > fh->overlay_settings.height) {
+			height = fh->overlay_settings.height - y;
+		}
+
+		/* ignore degenerate clips */
+		if (height <= 0) {
+			continue;
+		}
+		if (width <= 0) {
+			continue;
+		}
+
+		/* apply clip for each scan line */
+		for (j = 0; j < height; ++j) {
+			/* reset bit for each pixel */
+			/* this can be optimized later if need be */
+			mask = fh->overlay_mask + (y + j) * mask_line_size;
+			for (k = 0; k < width; ++k) {
+				mask[(x + k) / 32] &=
+				    ~((u32) 1 << (x + k) % 32);
+			}
+		}
+	}
+}
+
+/* Enable/Disable uncompressed memory grabbing of the 36057 */
+
+void
+zr36057_set_memgrab (struct zoran *zr,
+		     int           mode)
+{
+	if (mode) {
+		if (btread(ZR36057_VSSFGR) &
+		    (ZR36057_VSSFGR_SnapShot | ZR36057_VSSFGR_FrameGrab))
+			dprintk(1,
+				KERN_WARNING
+				"%s: zr36057_set_memgrab(1) with SnapShot or FrameGrab on!?\n",
+				ZR_DEVNAME(zr));
+
+		/* switch on VSync interrupts */
+		btwrite(IRQ_MASK, ZR36057_ISR);	// Clear Interrupts
+		btor(zr->card.vsync_int, ZR36057_ICR);	// SW
+
+		/* enable SnapShot */
+		btor(ZR36057_VSSFGR_SnapShot, ZR36057_VSSFGR);
+
+		/* Set zr36057 video front end  and enable video */
+		zr36057_set_vfe(zr, zr->v4l_settings.width,
+				zr->v4l_settings.height,
+				zr->v4l_settings.format);
+
+		zr->v4l_memgrab_active = 1;
+	} else {
+		zr->v4l_memgrab_active = 0;
+
+		/* switch off VSync interrupts */
+		btand(~zr->card.vsync_int, ZR36057_ICR);	// SW
+
+		/* reenable grabbing to screen if it was running */
+		if (zr->v4l_overlay_active) {
+			zr36057_overlay(zr, 1);
+		} else {
+			btand(~ZR36057_VDCR_VidEn, ZR36057_VDCR);
+			btand(~ZR36057_VSSFGR_SnapShot, ZR36057_VSSFGR);
+		}
+	}
+}
+
+int
+wait_grab_pending (struct zoran *zr)
+{
+	unsigned long flags;
+
+	/* wait until all pending grabs are finished */
+
+	if (!zr->v4l_memgrab_active)
+		return 0;
+
+	wait_event_interruptible(zr->v4l_capq,
+			(zr->v4l_pend_tail == zr->v4l_pend_head));
+	if (signal_pending(current))
+		return -ERESTARTSYS;
+
+	spin_lock_irqsave(&zr->spinlock, flags);
+	zr36057_set_memgrab(zr, 0);
+	spin_unlock_irqrestore(&zr->spinlock, flags);
+
+	return 0;
+}
+
+/*****************************************************************************
+ *                                                                           *
+ *  Set up the Buz-specific MJPEG part                                       *
+ *                                                                           *
+ *****************************************************************************/
+
+static inline void
+set_frame (struct zoran *zr,
+	   int           val)
+{
+	GPIO(zr, zr->card.gpio[GPIO_JPEG_FRAME], val);
+}
+
+static void
+set_videobus_dir (struct zoran *zr,
+		  int           val)
+{
+	switch (zr->card.type) {
+	case LML33:
+	case LML33R10:
+		if (lml33dpath == 0)
+			GPIO(zr, 5, val);
+		else
+			GPIO(zr, 5, 1);
+		break;
+	default:
+		GPIO(zr, zr->card.gpio[GPIO_VID_DIR],
+		     zr->card.gpio_pol[GPIO_VID_DIR] ? !val : val);
+		break;
+	}
+}
+
+static void
+init_jpeg_queue (struct zoran *zr)
+{
+	int i;
+
+	/* re-initialize DMA ring stuff */
+	zr->jpg_que_head = 0;
+	zr->jpg_dma_head = 0;
+	zr->jpg_dma_tail = 0;
+	zr->jpg_que_tail = 0;
+	zr->jpg_seq_num = 0;
+	zr->JPEG_error = 0;
+	zr->num_errors = 0;
+	zr->jpg_err_seq = 0;
+	zr->jpg_err_shift = 0;
+	zr->jpg_queued_num = 0;
+	for (i = 0; i < zr->jpg_buffers.num_buffers; i++) {
+		zr->jpg_buffers.buffer[i].state = BUZ_STATE_USER;	/* nothing going on */
+	}
+	for (i = 0; i < BUZ_NUM_STAT_COM; i++) {
+		zr->stat_com[i] = cpu_to_le32(1);	/* mark as unavailable to zr36057 */
+	}
+}
+
+static void
+zr36057_set_jpg (struct zoran          *zr,
+		 enum zoran_codec_mode  mode)
+{
+	struct tvnorm *tvn;
+	u32 reg;
+
+	tvn = zr->timing;
+
+	/* assert P_Reset, disable code transfer, deassert Active */
+	btwrite(0, ZR36057_JPC);
+
+	/* MJPEG compression mode */
+	switch (mode) {
+
+	case BUZ_MODE_MOTION_COMPRESS:
+	default:
+		reg = ZR36057_JMC_MJPGCmpMode;
+		break;
+
+	case BUZ_MODE_MOTION_DECOMPRESS:
+		reg = ZR36057_JMC_MJPGExpMode;
+		reg |= ZR36057_JMC_SyncMstr;
+		/* RJ: The following is experimental - improves the output to screen */
+		//if(zr->jpg_settings.VFIFO_FB) reg |= ZR36057_JMC_VFIFO_FB; // No, it doesn't. SM
+		break;
+
+	case BUZ_MODE_STILL_COMPRESS:
+		reg = ZR36057_JMC_JPGCmpMode;
+		break;
+
+	case BUZ_MODE_STILL_DECOMPRESS:
+		reg = ZR36057_JMC_JPGExpMode;
+		break;
+
+	}
+	reg |= ZR36057_JMC_JPG;
+	if (zr->jpg_settings.field_per_buff == 1)
+		reg |= ZR36057_JMC_Fld_per_buff;
+	btwrite(reg, ZR36057_JMC);
+
+	/* vertical */
+	btor(ZR36057_VFEVCR_VSPol, ZR36057_VFEVCR);
+	reg = (6 << ZR36057_VSP_VsyncSize) |
+	      (tvn->Ht << ZR36057_VSP_FrmTot);
+	btwrite(reg, ZR36057_VSP);
+	reg = ((zr->jpg_settings.img_y + tvn->VStart) << ZR36057_FVAP_NAY) |
+	      (zr->jpg_settings.img_height << ZR36057_FVAP_PAY);
+	btwrite(reg, ZR36057_FVAP);
+
+	/* horizontal */
+	if (zr->card.vfe_pol.hsync_pol)
+		btor(ZR36057_VFEHCR_HSPol, ZR36057_VFEHCR);
+	else
+		btand(~ZR36057_VFEHCR_HSPol, ZR36057_VFEHCR);		
+	reg = ((tvn->HSyncStart) << ZR36057_HSP_HsyncStart) |
+	      (tvn->Wt << ZR36057_HSP_LineTot);
+	btwrite(reg, ZR36057_HSP);
+	reg = ((zr->jpg_settings.img_x +
+	        tvn->HStart + 4) << ZR36057_FHAP_NAX) |
+	      (zr->jpg_settings.img_width << ZR36057_FHAP_PAX);
+	btwrite(reg, ZR36057_FHAP);
+
+	/* field process parameters */
+	if (zr->jpg_settings.odd_even)
+		reg = ZR36057_FPP_Odd_Even;
+	else
+		reg = 0;
+
+	btwrite(reg, ZR36057_FPP);
+
+	/* Set proper VCLK Polarity, else colors will be wrong during playback */
+	//btor(ZR36057_VFESPFR_VCLKPol, ZR36057_VFESPFR);
+
+	/* code base address */
+	reg = virt_to_bus(zr->stat_com);
+	btwrite(reg, ZR36057_JCBA);
+
+	/* FIFO threshold (FIFO is 160. double words) */
+	/* NOTE: decimal values here */
+	switch (mode) {
+
+	case BUZ_MODE_STILL_COMPRESS:
+	case BUZ_MODE_MOTION_COMPRESS:
+		if (zr->card.type != BUZ)
+			reg = 140;
+		else
+			reg = 60;
+		break;
+
+	case BUZ_MODE_STILL_DECOMPRESS:
+	case BUZ_MODE_MOTION_DECOMPRESS:
+		reg = 20;
+		break;
+
+	default:
+		reg = 80;
+		break;
+
+	}
+	btwrite(reg, ZR36057_JCFT);
+	zr36057_adjust_vfe(zr, mode);
+
+}
+
+void
+print_interrupts (struct zoran *zr)
+{
+	int res, noerr = 0;
+
+	printk(KERN_INFO "%s: interrupts received:", ZR_DEVNAME(zr));
+	if ((res = zr->field_counter) < -1 || res > 1) {
+		printk(" FD:%d", res);
+	}
+	if ((res = zr->intr_counter_GIRQ1) != 0) {
+		printk(" GIRQ1:%d", res);
+		noerr++;
+	}
+	if ((res = zr->intr_counter_GIRQ0) != 0) {
+		printk(" GIRQ0:%d", res);
+		noerr++;
+	}
+	if ((res = zr->intr_counter_CodRepIRQ) != 0) {
+		printk(" CodRepIRQ:%d", res);
+		noerr++;
+	}
+	if ((res = zr->intr_counter_JPEGRepIRQ) != 0) {
+		printk(" JPEGRepIRQ:%d", res);
+		noerr++;
+	}
+	if (zr->JPEG_max_missed) {
+		printk(" JPEG delays: max=%d min=%d", zr->JPEG_max_missed,
+		       zr->JPEG_min_missed);
+	}
+	if (zr->END_event_missed) {
+		printk(" ENDs missed: %d", zr->END_event_missed);
+	}
+	//if (zr->jpg_queued_num) {
+	printk(" queue_state=%ld/%ld/%ld/%ld", zr->jpg_que_tail,
+	       zr->jpg_dma_tail, zr->jpg_dma_head, zr->jpg_que_head);
+	//}
+	if (!noerr) {
+		printk(": no interrupts detected.");
+	}
+	printk("\n");
+}
+
+void
+clear_interrupt_counters (struct zoran *zr)
+{
+	zr->intr_counter_GIRQ1 = 0;
+	zr->intr_counter_GIRQ0 = 0;
+	zr->intr_counter_CodRepIRQ = 0;
+	zr->intr_counter_JPEGRepIRQ = 0;
+	zr->field_counter = 0;
+	zr->IRQ1_in = 0;
+	zr->IRQ1_out = 0;
+	zr->JPEG_in = 0;
+	zr->JPEG_out = 0;
+	zr->JPEG_0 = 0;
+	zr->JPEG_1 = 0;
+	zr->END_event_missed = 0;
+	zr->JPEG_missed = 0;
+	zr->JPEG_max_missed = 0;
+	zr->JPEG_min_missed = 0x7fffffff;
+}
+
+static u32
+count_reset_interrupt (struct zoran *zr)
+{
+	u32 isr;
+
+	if ((isr = btread(ZR36057_ISR) & 0x78000000)) {
+		if (isr & ZR36057_ISR_GIRQ1) {
+			btwrite(ZR36057_ISR_GIRQ1, ZR36057_ISR);
+			zr->intr_counter_GIRQ1++;
+		}
+		if (isr & ZR36057_ISR_GIRQ0) {
+			btwrite(ZR36057_ISR_GIRQ0, ZR36057_ISR);
+			zr->intr_counter_GIRQ0++;
+		}
+		if (isr & ZR36057_ISR_CodRepIRQ) {
+			btwrite(ZR36057_ISR_CodRepIRQ, ZR36057_ISR);
+			zr->intr_counter_CodRepIRQ++;
+		}
+		if (isr & ZR36057_ISR_JPEGRepIRQ) {
+			btwrite(ZR36057_ISR_JPEGRepIRQ, ZR36057_ISR);
+			zr->intr_counter_JPEGRepIRQ++;
+		}
+	}
+	return isr;
+}
+
+/* hack */
+extern void zr36016_write (struct videocodec *codec,
+			   u16                reg,
+			   u32                val);
+
+void
+jpeg_start (struct zoran *zr)
+{
+	int reg;
+
+	zr->frame_num = 0;
+
+	/* deassert P_reset, disable code transfer, deassert Active */
+	btwrite(ZR36057_JPC_P_Reset, ZR36057_JPC);
+	/* stop flushing the internal code buffer */
+	btand(~ZR36057_MCTCR_CFlush, ZR36057_MCTCR);
+	/* enable code transfer */
+	btor(ZR36057_JPC_CodTrnsEn, ZR36057_JPC);
+
+	/* clear IRQs */
+	btwrite(IRQ_MASK, ZR36057_ISR);
+	/* enable the JPEG IRQs */
+	btwrite(zr->card.jpeg_int |
+			ZR36057_ICR_JPEGRepIRQ |
+			ZR36057_ICR_IntPinEn,
+		ZR36057_ICR);
+
+	set_frame(zr, 0);	// \FRAME
+
+	/* set the JPEG codec guest ID */
+	reg = (zr->card.gpcs[1] << ZR36057_JCGI_JPEGuestID) |
+	       (0 << ZR36057_JCGI_JPEGuestReg);
+	btwrite(reg, ZR36057_JCGI);
+
+	if (zr->card.video_vfe == CODEC_TYPE_ZR36016 &&
+	    zr->card.video_codec == CODEC_TYPE_ZR36050) {
+		/* Enable processing on the ZR36016 */
+		if (zr->vfe)
+			zr36016_write(zr->vfe, 0, 1);
+
+		/* load the address of the GO register in the ZR36050 latch */
+		post_office_write(zr, 0, 0, 0);
+	}
+
+	/* assert Active */
+	btor(ZR36057_JPC_Active, ZR36057_JPC);
+
+	/* enable the Go generation */
+	btor(ZR36057_JMC_Go_en, ZR36057_JMC);
+	udelay(30);
+
+	set_frame(zr, 1);	// /FRAME
+
+	dprintk(3, KERN_DEBUG "%s: jpeg_start\n", ZR_DEVNAME(zr));
+}
+
+void
+zr36057_enable_jpg (struct zoran          *zr,
+		    enum zoran_codec_mode  mode)
+{
+	static int zero = 0;
+	static int one = 1;
+	struct vfe_settings cap;
+	int field_size =
+	    zr->jpg_buffers.buffer_size / zr->jpg_settings.field_per_buff;
+
+	zr->codec_mode = mode;
+
+	cap.x = zr->jpg_settings.img_x;
+	cap.y = zr->jpg_settings.img_y;
+	cap.width = zr->jpg_settings.img_width;
+	cap.height = zr->jpg_settings.img_height;
+	cap.decimation =
+	    zr->jpg_settings.HorDcm | (zr->jpg_settings.VerDcm << 8);
+	cap.quality = zr->jpg_settings.jpg_comp.quality;
+
+	switch (mode) {
+
+	case BUZ_MODE_MOTION_COMPRESS: {
+		struct jpeg_app_marker app;
+		struct jpeg_com_marker com;
+
+		/* In motion compress mode, the decoder output must be enabled, and
+		 * the video bus direction set to input.
+		 */
+		set_videobus_dir(zr, 0);
+		decoder_command(zr, DECODER_ENABLE_OUTPUT, &one);
+		encoder_command(zr, ENCODER_SET_INPUT, &zero);
+
+		/* Take the JPEG codec and the VFE out of sleep */
+		jpeg_codec_sleep(zr, 0);
+
+		/* set JPEG app/com marker */
+		app.appn = zr->jpg_settings.jpg_comp.APPn;
+		app.len = zr->jpg_settings.jpg_comp.APP_len;
+		memcpy(app.data, zr->jpg_settings.jpg_comp.APP_data, 60);
+		zr->codec->control(zr->codec, CODEC_S_JPEG_APP_DATA,
+				   sizeof(struct jpeg_app_marker), &app);
+
+		com.len = zr->jpg_settings.jpg_comp.COM_len;
+		memcpy(com.data, zr->jpg_settings.jpg_comp.COM_data, 60);
+		zr->codec->control(zr->codec, CODEC_S_JPEG_COM_DATA,
+				   sizeof(struct jpeg_com_marker), &com);
+
+		/* Setup the JPEG codec */
+		zr->codec->control(zr->codec, CODEC_S_JPEG_TDS_BYTE,
+				   sizeof(int), &field_size);
+		zr->codec->set_video(zr->codec, zr->timing, &cap,
+				     &zr->card.vfe_pol);
+		zr->codec->set_mode(zr->codec, CODEC_DO_COMPRESSION);
+
+		/* Setup the VFE */
+		if (zr->vfe) {
+			zr->vfe->control(zr->vfe, CODEC_S_JPEG_TDS_BYTE,
+					 sizeof(int), &field_size);
+			zr->vfe->set_video(zr->vfe, zr->timing, &cap,
+					   &zr->card.vfe_pol);
+			zr->vfe->set_mode(zr->vfe, CODEC_DO_COMPRESSION);
+		}
+
+		init_jpeg_queue(zr);
+		zr36057_set_jpg(zr, mode);	// \P_Reset, ... Video param, FIFO
+
+		clear_interrupt_counters(zr);
+		dprintk(2, KERN_INFO "%s: enable_jpg(MOTION_COMPRESS)\n",
+			ZR_DEVNAME(zr));
+		break;
+	}
+
+	case BUZ_MODE_MOTION_DECOMPRESS:
+		/* In motion decompression mode, the decoder output must be disabled, and
+		 * the video bus direction set to output.
+		 */
+		decoder_command(zr, DECODER_ENABLE_OUTPUT, &zero);
+		set_videobus_dir(zr, 1);
+		encoder_command(zr, ENCODER_SET_INPUT, &one);
+
+		/* Take the JPEG codec and the VFE out of sleep */
+		jpeg_codec_sleep(zr, 0);
+		/* Setup the VFE */
+		if (zr->vfe) {
+			zr->vfe->set_video(zr->vfe, zr->timing, &cap,
+					   &zr->card.vfe_pol);
+			zr->vfe->set_mode(zr->vfe, CODEC_DO_EXPANSION);
+		}
+		/* Setup the JPEG codec */
+		zr->codec->set_video(zr->codec, zr->timing, &cap,
+				     &zr->card.vfe_pol);
+		zr->codec->set_mode(zr->codec, CODEC_DO_EXPANSION);
+
+		init_jpeg_queue(zr);
+		zr36057_set_jpg(zr, mode);	// \P_Reset, ... Video param, FIFO
+
+		clear_interrupt_counters(zr);
+		dprintk(2, KERN_INFO "%s: enable_jpg(MOTION_DECOMPRESS)\n",
+			ZR_DEVNAME(zr));
+		break;
+
+	case BUZ_MODE_IDLE:
+	default:
+		/* shut down processing */
+		btand(~(zr->card.jpeg_int | ZR36057_ICR_JPEGRepIRQ),
+		      ZR36057_ICR);
+		btwrite(zr->card.jpeg_int | ZR36057_ICR_JPEGRepIRQ,
+			ZR36057_ISR);
+		btand(~ZR36057_JMC_Go_en, ZR36057_JMC);	// \Go_en
+
+		msleep(50);
+
+		set_videobus_dir(zr, 0);
+		set_frame(zr, 1);	// /FRAME
+		btor(ZR36057_MCTCR_CFlush, ZR36057_MCTCR);	// /CFlush
+		btwrite(0, ZR36057_JPC);	// \P_Reset,\CodTrnsEn,\Active
+		btand(~ZR36057_JMC_VFIFO_FB, ZR36057_JMC);
+		btand(~ZR36057_JMC_SyncMstr, ZR36057_JMC);
+		jpeg_codec_reset(zr);
+		jpeg_codec_sleep(zr, 1);
+		zr36057_adjust_vfe(zr, mode);
+
+		decoder_command(zr, DECODER_ENABLE_OUTPUT, &one);
+		encoder_command(zr, ENCODER_SET_INPUT, &zero);
+
+		dprintk(2, KERN_INFO "%s: enable_jpg(IDLE)\n", ZR_DEVNAME(zr));
+		break;
+
+	}
+}
+
+/* when this is called the spinlock must be held */
+void
+zoran_feed_stat_com (struct zoran *zr)
+{
+	/* move frames from pending queue to DMA */
+
+	int frame, i, max_stat_com;
+
+	max_stat_com =
+	    (zr->jpg_settings.TmpDcm ==
+	     1) ? BUZ_NUM_STAT_COM : (BUZ_NUM_STAT_COM >> 1);
+
+	while ((zr->jpg_dma_head - zr->jpg_dma_tail) < max_stat_com &&
+	       zr->jpg_dma_head < zr->jpg_que_head) {
+
+		frame = zr->jpg_pend[zr->jpg_dma_head & BUZ_MASK_FRAME];
+		if (zr->jpg_settings.TmpDcm == 1) {
+			/* fill 1 stat_com entry */
+			i = (zr->jpg_dma_head -
+			     zr->jpg_err_shift) & BUZ_MASK_STAT_COM;
+			if (!(zr->stat_com[i] & cpu_to_le32(1)))
+				break;
+			zr->stat_com[i] =
+			    cpu_to_le32(zr->jpg_buffers.buffer[frame].frag_tab_bus);
+		} else {
+			/* fill 2 stat_com entries */
+			i = ((zr->jpg_dma_head -
+			      zr->jpg_err_shift) & 1) * 2;
+			if (!(zr->stat_com[i] & cpu_to_le32(1)))
+				break;
+			zr->stat_com[i] =
+			    cpu_to_le32(zr->jpg_buffers.buffer[frame].frag_tab_bus);
+			zr->stat_com[i + 1] =
+			    cpu_to_le32(zr->jpg_buffers.buffer[frame].frag_tab_bus);
+		}
+		zr->jpg_buffers.buffer[frame].state = BUZ_STATE_DMA;
+		zr->jpg_dma_head++;
+
+	}
+	if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS)
+		zr->jpg_queued_num++;
+}
+
+/* when this is called the spinlock must be held */
+static void
+zoran_reap_stat_com (struct zoran *zr)
+{
+	/* move frames from DMA queue to done queue */
+
+	int i;
+	u32 stat_com;
+	unsigned int seq;
+	unsigned int dif;
+	struct zoran_jpg_buffer *buffer;
+	int frame;
+
+	/* In motion decompress we don't have a hardware frame counter,
+	 * we just count the interrupts here */
+
+	if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS) {
+		zr->jpg_seq_num++;
+	}
+	while (zr->jpg_dma_tail < zr->jpg_dma_head) {
+		if (zr->jpg_settings.TmpDcm == 1)
+			i = (zr->jpg_dma_tail -
+			     zr->jpg_err_shift) & BUZ_MASK_STAT_COM;
+		else
+			i = ((zr->jpg_dma_tail -
+			      zr->jpg_err_shift) & 1) * 2 + 1;
+
+		stat_com = le32_to_cpu(zr->stat_com[i]);
+
+		if ((stat_com & 1) == 0) {
+			return;
+		}
+		frame = zr->jpg_pend[zr->jpg_dma_tail & BUZ_MASK_FRAME];
+		buffer = &zr->jpg_buffers.buffer[frame];
+		do_gettimeofday(&buffer->bs.timestamp);
+
+		if (zr->codec_mode == BUZ_MODE_MOTION_COMPRESS) {
+			buffer->bs.length = (stat_com & 0x7fffff) >> 1;
+
+			/* update sequence number with the help of the counter in stat_com */
+
+			seq = ((stat_com >> 24) + zr->jpg_err_seq) & 0xff;
+			dif = (seq - zr->jpg_seq_num) & 0xff;
+			zr->jpg_seq_num += dif;
+		} else {
+			buffer->bs.length = 0;
+		}
+		buffer->bs.seq =
+		    zr->jpg_settings.TmpDcm ==
+		    2 ? (zr->jpg_seq_num >> 1) : zr->jpg_seq_num;
+		buffer->state = BUZ_STATE_DONE;
+
+		zr->jpg_dma_tail++;
+	}
+}
+
+static void
+error_handler (struct zoran *zr,
+	       u32           astat,
+	       u32           stat)
+{
+	/* This is JPEG error handling part */
+	if ((zr->codec_mode != BUZ_MODE_MOTION_COMPRESS) &&
+	    (zr->codec_mode != BUZ_MODE_MOTION_DECOMPRESS)) {
+		//dprintk(1, KERN_ERR "%s: Internal error: error handling request in mode %d\n", ZR_DEVNAME(zr), zr->codec_mode);
+		return;
+	}
+
+	if ((stat & 1) == 0 &&
+	    zr->codec_mode == BUZ_MODE_MOTION_COMPRESS &&
+	    zr->jpg_dma_tail - zr->jpg_que_tail >=
+	     zr->jpg_buffers.num_buffers) {
+		/* No free buffers... */
+		zoran_reap_stat_com(zr);
+		zoran_feed_stat_com(zr);
+		wake_up_interruptible(&zr->jpg_capq);
+		zr->JPEG_missed = 0;
+		return;
+	}
+
+	if (zr->JPEG_error != 1) {
+		/*
+		 * First entry: error just happened during normal operation
+		 * 
+		 * In BUZ_MODE_MOTION_COMPRESS:
+		 * 
+		 * Possible glitch in TV signal. In this case we should
+		 * stop the codec and wait for good quality signal before
+		 * restarting it to avoid further problems
+		 * 
+		 * In BUZ_MODE_MOTION_DECOMPRESS:
+		 * 
+		 * Bad JPEG frame: we have to mark it as processed (codec crashed
+		 * and was not able to do it itself), and to remove it from queue.
+		 */
+		btand(~ZR36057_JMC_Go_en, ZR36057_JMC);
+		udelay(1);
+		stat = stat | (post_office_read(zr, 7, 0) & 3) << 8;
+		btwrite(0, ZR36057_JPC);
+		btor(ZR36057_MCTCR_CFlush, ZR36057_MCTCR);
+		jpeg_codec_reset(zr);
+		jpeg_codec_sleep(zr, 1);
+		zr->JPEG_error = 1;
+		zr->num_errors++;
+
+		/* Report error */
+		if (*zr_debug > 1 && zr->num_errors <= 8) {
+			long frame;
+			frame =
+			    zr->jpg_pend[zr->jpg_dma_tail & BUZ_MASK_FRAME];
+			printk(KERN_ERR
+			       "%s: JPEG error stat=0x%08x(0x%08x) queue_state=%ld/%ld/%ld/%ld seq=%ld frame=%ld. Codec stopped. ",
+			       ZR_DEVNAME(zr), stat, zr->last_isr,
+			       zr->jpg_que_tail, zr->jpg_dma_tail,
+			       zr->jpg_dma_head, zr->jpg_que_head,
+			       zr->jpg_seq_num, frame);
+			printk("stat_com frames:");
+			{
+				int i, j;
+				for (j = 0; j < BUZ_NUM_STAT_COM; j++) {
+					for (i = 0;
+					     i < zr->jpg_buffers.num_buffers;
+					     i++) {
+						if (le32_to_cpu(zr->stat_com[j]) ==
+						    zr->jpg_buffers.
+						    buffer[i].
+						    frag_tab_bus) {
+							printk("% d->%d",
+							       j, i);
+						}
+					}
+				}
+				printk("\n");
+			}
+		}
+		/* Find an entry in stat_com and rotate contents */
+		{
+			int i;
+
+			if (zr->jpg_settings.TmpDcm == 1)
+				i = (zr->jpg_dma_tail -
+				     zr->jpg_err_shift) & BUZ_MASK_STAT_COM;
+			else
+				i = ((zr->jpg_dma_tail -
+				      zr->jpg_err_shift) & 1) * 2;
+			if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS) {
+				/* Mimic zr36067 operation */
+				zr->stat_com[i] |= cpu_to_le32(1);
+				if (zr->jpg_settings.TmpDcm != 1)
+					zr->stat_com[i + 1] |= cpu_to_le32(1);
+				/* Refill */
+				zoran_reap_stat_com(zr);
+				zoran_feed_stat_com(zr);
+				wake_up_interruptible(&zr->jpg_capq);
+				/* Find an entry in stat_com again after refill */
+				if (zr->jpg_settings.TmpDcm == 1)
+					i = (zr->jpg_dma_tail -
+					     zr->jpg_err_shift) &
+					    BUZ_MASK_STAT_COM;
+				else
+					i = ((zr->jpg_dma_tail -
+					      zr->jpg_err_shift) & 1) * 2;
+			}
+			if (i) {
+				/* Rotate stat_comm entries to make current entry first */
+				int j;
+				u32 bus_addr[BUZ_NUM_STAT_COM];
+
+				/* Here we are copying the stat_com array, which
+				 * is already in little endian format, so
+				 * no endian conversions here
+				 */
+				memcpy(bus_addr, zr->stat_com,
+				       sizeof(bus_addr));
+				for (j = 0; j < BUZ_NUM_STAT_COM; j++) {
+					zr->stat_com[j] =
+					    bus_addr[(i + j) &
+						     BUZ_MASK_STAT_COM];
+
+				}
+				zr->jpg_err_shift += i;
+				zr->jpg_err_shift &= BUZ_MASK_STAT_COM;
+			}
+			if (zr->codec_mode == BUZ_MODE_MOTION_COMPRESS)
+				zr->jpg_err_seq = zr->jpg_seq_num;	/* + 1; */
+		}
+	}
+
+	/* Now the stat_comm buffer is ready for restart */
+	do {
+		int status, mode;
+
+		if (zr->codec_mode == BUZ_MODE_MOTION_COMPRESS) {
+			decoder_command(zr, DECODER_GET_STATUS, &status);
+			mode = CODEC_DO_COMPRESSION;
+		} else {
+			status = 0;
+			mode = CODEC_DO_EXPANSION;
+		}
+		if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS ||
+		    (status & DECODER_STATUS_GOOD)) {
+			/********** RESTART code *************/
+			jpeg_codec_reset(zr);
+			zr->codec->set_mode(zr->codec, mode);
+			zr36057_set_jpg(zr, zr->codec_mode);
+			jpeg_start(zr);
+
+			if (zr->num_errors <= 8)
+				dprintk(2, KERN_INFO "%s: Restart\n",
+					ZR_DEVNAME(zr));
+
+			zr->JPEG_missed = 0;
+			zr->JPEG_error = 2;
+			/********** End RESTART code ***********/
+		}
+	} while (0);
+}
+
+irqreturn_t
+zoran_irq (int             irq,
+	   void           *dev_id,
+	   struct pt_regs *regs)
+{
+	u32 stat, astat;
+	int count;
+	struct zoran *zr;
+	unsigned long flags;
+
+	zr = (struct zoran *) dev_id;
+	count = 0;
+
+	if (zr->testing) {
+		/* Testing interrupts */
+		spin_lock_irqsave(&zr->spinlock, flags);
+		while ((stat = count_reset_interrupt(zr))) {
+			if (count++ > 100) {
+				btand(~ZR36057_ICR_IntPinEn, ZR36057_ICR);
+				dprintk(1,
+					KERN_ERR
+					"%s: IRQ lockup while testing, isr=0x%08x, cleared int mask\n",
+					ZR_DEVNAME(zr), stat);
+				wake_up_interruptible(&zr->test_q);
+			}
+		}
+		zr->last_isr = stat;
+		spin_unlock_irqrestore(&zr->spinlock, flags);
+		return IRQ_HANDLED;
+	}
+
+	spin_lock_irqsave(&zr->spinlock, flags);
+	while (1) {
+		/* get/clear interrupt status bits */
+		stat = count_reset_interrupt(zr);
+		astat = stat & IRQ_MASK;
+		if (!astat) {
+			break;
+		}
+		dprintk(4,
+			KERN_DEBUG
+			"zoran_irq: astat: 0x%08x, mask: 0x%08x\n",
+			astat, btread(ZR36057_ICR));
+		if (astat & zr->card.vsync_int) {	// SW
+
+			if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS ||
+			    zr->codec_mode == BUZ_MODE_MOTION_COMPRESS) {
+				/* count missed interrupts */
+				zr->JPEG_missed++;
+			}
+			//post_office_read(zr,1,0);
+			/* Interrupts may still happen when
+			 * zr->v4l_memgrab_active is switched off.
+			 * We simply ignore them */
+
+			if (zr->v4l_memgrab_active) {
+
+				/* A lot more checks should be here ... */
+				if ((btread(ZR36057_VSSFGR) &
+				     ZR36057_VSSFGR_SnapShot) == 0)
+					dprintk(1,
+						KERN_WARNING
+						"%s: BuzIRQ with SnapShot off ???\n",
+						ZR_DEVNAME(zr));
+
+				if (zr->v4l_grab_frame != NO_GRAB_ACTIVE) {
+					/* There is a grab on a frame going on, check if it has finished */
+
+					if ((btread(ZR36057_VSSFGR) &
+					     ZR36057_VSSFGR_FrameGrab) ==
+					    0) {
+						/* it is finished, notify the user */
+
+						zr->v4l_buffers.buffer[zr->v4l_grab_frame].state = BUZ_STATE_DONE;
+						zr->v4l_buffers.buffer[zr->v4l_grab_frame].bs.seq = zr->v4l_grab_seq;
+						do_gettimeofday(&zr->v4l_buffers.buffer[zr->v4l_grab_frame].bs.timestamp);
+						zr->v4l_grab_frame = NO_GRAB_ACTIVE;
+						zr->v4l_pend_tail++;
+					}
+				}
+
+				if (zr->v4l_grab_frame == NO_GRAB_ACTIVE)
+					wake_up_interruptible(&zr->v4l_capq);
+
+				/* Check if there is another grab queued */
+
+				if (zr->v4l_grab_frame == NO_GRAB_ACTIVE &&
+				    zr->v4l_pend_tail != zr->v4l_pend_head) {
+
+					int frame = zr->v4l_pend[zr->v4l_pend_tail &
+							 V4L_MASK_FRAME];
+					u32 reg;
+
+					zr->v4l_grab_frame = frame;
+
+					/* Set zr36057 video front end and enable video */
+
+					/* Buffer address */
+
+					reg =
+					    zr->v4l_buffers.buffer[frame].
+					    fbuffer_bus;
+					btwrite(reg, ZR36057_VDTR);
+					if (zr->v4l_settings.height >
+					    BUZ_MAX_HEIGHT / 2)
+						reg +=
+						    zr->v4l_settings.
+						    bytesperline;
+					btwrite(reg, ZR36057_VDBR);
+
+					/* video stride, status, and frame grab register */
+					reg = 0;
+					if (zr->v4l_settings.height >
+					    BUZ_MAX_HEIGHT / 2)
+						reg +=
+						    zr->v4l_settings.
+						    bytesperline;
+					reg =
+					    (reg <<
+					     ZR36057_VSSFGR_DispStride);
+					reg |= ZR36057_VSSFGR_VidOvf;
+					reg |= ZR36057_VSSFGR_SnapShot;
+					reg |= ZR36057_VSSFGR_FrameGrab;
+					btwrite(reg, ZR36057_VSSFGR);
+
+					btor(ZR36057_VDCR_VidEn,
+					     ZR36057_VDCR);
+				}
+			}
+
+			/* even if we don't grab, we do want to increment
+			 * the sequence counter to see lost frames */
+			zr->v4l_grab_seq++;
+		}
+#if (IRQ_MASK & ZR36057_ISR_CodRepIRQ)
+		if (astat & ZR36057_ISR_CodRepIRQ) {
+			zr->intr_counter_CodRepIRQ++;
+			IDEBUG(printk
+			       (KERN_DEBUG "%s: ZR36057_ISR_CodRepIRQ\n",
+				ZR_DEVNAME(zr)));
+			btand(~ZR36057_ICR_CodRepIRQ, ZR36057_ICR);
+		}
+#endif				/* (IRQ_MASK & ZR36057_ISR_CodRepIRQ) */
+
+#if (IRQ_MASK & ZR36057_ISR_JPEGRepIRQ)
+		if (astat & ZR36057_ISR_JPEGRepIRQ) {
+
+			if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS ||
+			    zr->codec_mode == BUZ_MODE_MOTION_COMPRESS) {
+				if (*zr_debug > 1 &&
+				    (!zr->frame_num || zr->JPEG_error)) {
+					printk(KERN_INFO
+					       "%s: first frame ready: state=0x%08x odd_even=%d field_per_buff=%d delay=%d\n",
+					       ZR_DEVNAME(zr), stat,
+					       zr->jpg_settings.odd_even,
+					       zr->jpg_settings.
+					       field_per_buff,
+					       zr->JPEG_missed);
+					{
+						char sc[] = "0000";
+						char sv[5];
+						int i;
+						strcpy(sv, sc);
+						for (i = 0; i < 4; i++) {
+							if (le32_to_cpu(zr->stat_com[i]) & 1)
+								sv[i] = '1';
+						}
+						sv[4] = 0;
+						printk(KERN_INFO
+						       "%s: stat_com=%s queue_state=%ld/%ld/%ld/%ld\n",
+						       ZR_DEVNAME(zr), sv,
+						       zr->jpg_que_tail,
+						       zr->jpg_dma_tail,
+						       zr->jpg_dma_head,
+						       zr->jpg_que_head);
+					}
+				} else {
+					if (zr->JPEG_missed > zr->JPEG_max_missed)	// Get statistics
+						zr->JPEG_max_missed =
+						    zr->JPEG_missed;
+					if (zr->JPEG_missed <
+					    zr->JPEG_min_missed)
+						zr->JPEG_min_missed =
+						    zr->JPEG_missed;
+				}
+
+				if (*zr_debug > 2 && zr->frame_num < 6) {
+					int i;
+					printk("%s: seq=%ld stat_com:",
+					       ZR_DEVNAME(zr), zr->jpg_seq_num);
+					for (i = 0; i < 4; i++) {
+						printk(" %08x",
+						       le32_to_cpu(zr->stat_com[i]));
+					}
+					printk("\n");
+				}
+				zr->frame_num++;
+				zr->JPEG_missed = 0;
+				zr->JPEG_error = 0;
+				zoran_reap_stat_com(zr);
+				zoran_feed_stat_com(zr);
+				wake_up_interruptible(&zr->jpg_capq);
+			} /*else {
+			      dprintk(1,
+					KERN_ERR
+					"%s: JPEG interrupt while not in motion (de)compress mode!\n",
+					ZR_DEVNAME(zr));
+			}*/
+		}
+#endif				/* (IRQ_MASK & ZR36057_ISR_JPEGRepIRQ) */
+
+		/* DATERR, too many fields missed, error processing */
+		if ((astat & zr->card.jpeg_int) ||
+		    zr->JPEG_missed > 25 ||
+		    zr->JPEG_error == 1	||
+		    ((zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS) &&
+		     (zr->frame_num & (zr->JPEG_missed >
+				       zr->jpg_settings.field_per_buff)))) {
+			error_handler(zr, astat, stat);
+		}
+
+		count++;
+		if (count > 10) {
+			dprintk(2, KERN_WARNING "%s: irq loop %d\n",
+				ZR_DEVNAME(zr), count);
+			if (count > 20) {
+				btand(~ZR36057_ICR_IntPinEn, ZR36057_ICR);
+				dprintk(2,
+					KERN_ERR
+					"%s: IRQ lockup, cleared int mask\n",
+					ZR_DEVNAME(zr));
+				break;
+			}
+		}
+		zr->last_isr = stat;
+	}
+	spin_unlock_irqrestore(&zr->spinlock, flags);
+
+	return IRQ_HANDLED;
+}
+
+void
+zoran_set_pci_master (struct zoran *zr,
+		      int           set_master)
+{
+	if (set_master) {
+		pci_set_master(zr->pci_dev);
+	} else {
+		u16 command;
+
+		pci_read_config_word(zr->pci_dev, PCI_COMMAND, &command);
+		command &= ~PCI_COMMAND_MASTER;
+		pci_write_config_word(zr->pci_dev, PCI_COMMAND, command);
+	}
+}
+
+void
+zoran_init_hardware (struct zoran *zr)
+{
+	int j, zero = 0;
+
+	/* Enable bus-mastering */
+	zoran_set_pci_master(zr, 1);
+
+	/* Initialize the board */
+	if (zr->card.init) {
+		zr->card.init(zr);
+	}
+
+	j = zr->card.input[zr->input].muxsel;
+
+	decoder_command(zr, 0, NULL);
+	decoder_command(zr, DECODER_SET_NORM, &zr->norm);
+	decoder_command(zr, DECODER_SET_INPUT, &j);
+
+	encoder_command(zr, 0, NULL);
+	encoder_command(zr, ENCODER_SET_NORM, &zr->norm);
+	encoder_command(zr, ENCODER_SET_INPUT, &zero);
+
+	/* toggle JPEG codec sleep to sync PLL */
+	jpeg_codec_sleep(zr, 1);
+	jpeg_codec_sleep(zr, 0);
+
+	/* set individual interrupt enables (without GIRQ1)
+	 * but don't global enable until zoran_open() */
+
+	//btwrite(IRQ_MASK & ~ZR36057_ISR_GIRQ1, ZR36057_ICR);  // SW
+	// It looks like using only JPEGRepIRQEn is not always reliable,
+	// may be when JPEG codec crashes it won't generate IRQ? So,
+	 /*CP*/			//        btwrite(IRQ_MASK, ZR36057_ICR); // Enable Vsync interrupts too. SM    WHY ? LP
+	    zr36057_init_vfe(zr);
+
+	zr36057_enable_jpg(zr, BUZ_MODE_IDLE);
+
+	btwrite(IRQ_MASK, ZR36057_ISR);	// Clears interrupts
+}
+
+void
+zr36057_restart (struct zoran *zr)
+{
+	btwrite(0, ZR36057_SPGPPCR);
+	mdelay(1);
+	btor(ZR36057_SPGPPCR_SoftReset, ZR36057_SPGPPCR);
+	mdelay(1);
+
+	/* assert P_Reset */
+	btwrite(0, ZR36057_JPC);
+	/* set up GPIO direction - all output */
+	btwrite(ZR36057_SPGPPCR_SoftReset | 0, ZR36057_SPGPPCR);
+
+	/* set up GPIO pins and guest bus timing */
+	btwrite((0x81 << 24) | 0x8888, ZR36057_GPPGCR1);
+}
+
+/*
+ * initialize video front end
+ */
+
+static void
+zr36057_init_vfe (struct zoran *zr)
+{
+	u32 reg;
+
+	reg = btread(ZR36057_VFESPFR);
+	reg |= ZR36057_VFESPFR_LittleEndian;
+	reg &= ~ZR36057_VFESPFR_VCLKPol;
+	reg |= ZR36057_VFESPFR_ExtFl;
+	reg |= ZR36057_VFESPFR_TopField;
+	btwrite(reg, ZR36057_VFESPFR);
+	reg = btread(ZR36057_VDCR);
+	if (pci_pci_problems & PCIPCI_TRITON)
+		// || zr->revision < 1) // Revision 1 has also Triton support
+		reg &= ~ZR36057_VDCR_Triton;
+	else
+		reg |= ZR36057_VDCR_Triton;
+	btwrite(reg, ZR36057_VDCR);
+}
+
+/*
+ * Interface to decoder and encoder chips using i2c bus
+ */
+
+int
+decoder_command (struct zoran *zr,
+		 int           cmd,
+		 void         *data)
+{
+	if (zr->decoder == NULL)
+		return -EIO;
+
+	if (zr->card.type == LML33 &&
+	    (cmd == DECODER_SET_NORM || DECODER_SET_INPUT)) {
+		int res;
+
+		// Bt819 needs to reset its FIFO buffer using #FRST pin and
+		// LML33 card uses GPIO(7) for that.
+		GPIO(zr, 7, 0);
+		res = zr->decoder->driver->command(zr->decoder, cmd, data);
+		// Pull #FRST high.
+		GPIO(zr, 7, 1);
+		return res;
+	} else
+		return zr->decoder->driver->command(zr->decoder, cmd,
+						    data);
+}
+
+int
+encoder_command (struct zoran *zr,
+		 int           cmd,
+		 void         *data)
+{
+	if (zr->encoder == NULL)
+		return -1;
+
+	return zr->encoder->driver->command(zr->encoder, cmd, data);
+}