drivers/media/video/bttv-driver.c

/*

    bttv - Bt848 frame grabber driver

    Copyright (C) 1996,97,98 Ralph  Metzler <rjkm@thp.uni-koeln.de>
			   & Marcus Metzler <mocm@thp.uni-koeln.de>
    (c) 1999-2002 Gerd Knorr <kraxel@bytesex.org>

    some v4l2 code lines are taken from Justin's bttv2 driver which is
    (c) 2000 Justin Schoeman <justin@suntiger.ee.up.ac.za>

    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/moduleparam.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/kdev_t.h>
#include <linux/dma-mapping.h>

#include <asm/io.h>
#include <asm/byteorder.h>

#include "bttvp.h"

#include "rds.h"


unsigned int bttv_num;			/* number of Bt848s in use */
struct bttv bttvs[BTTV_MAX];

unsigned int bttv_debug = 0;
unsigned int bttv_verbose = 1;
unsigned int bttv_gpio = 0;

/* config variables */
#ifdef __BIG_ENDIAN
static unsigned int bigendian=1;
#else
static unsigned int bigendian=0;
#endif
static unsigned int radio[BTTV_MAX];
static unsigned int irq_debug = 0;
static unsigned int gbuffers = 8;
static unsigned int gbufsize = 0x208000;

static int video_nr = -1;
static int radio_nr = -1;
static int vbi_nr = -1;
static int debug_latency = 0;

static unsigned int fdsr = 0;

/* options */
static unsigned int combfilter  = 0;
static unsigned int lumafilter  = 0;
static unsigned int automute    = 1;
static unsigned int chroma_agc  = 0;
static unsigned int adc_crush   = 1;
static unsigned int whitecrush_upper = 0xCF;
static unsigned int whitecrush_lower = 0x7F;
static unsigned int vcr_hack    = 0;
static unsigned int irq_iswitch = 0;
static unsigned int uv_ratio    = 50;
static unsigned int full_luma_range = 0;
static unsigned int coring      = 0;
extern int no_overlay;

/* API features (turn on/off stuff for testing) */
static unsigned int v4l2        = 1;


/* insmod args */
module_param(bttv_verbose,      int, 0644);
module_param(bttv_gpio,         int, 0644);
module_param(bttv_debug,        int, 0644);
module_param(irq_debug,         int, 0644);
module_param(debug_latency,     int, 0644);

module_param(fdsr,              int, 0444);
module_param(video_nr,          int, 0444);
module_param(radio_nr,          int, 0444);
module_param(vbi_nr,            int, 0444);
module_param(gbuffers,          int, 0444);
module_param(gbufsize,          int, 0444);

module_param(v4l2,              int, 0644);
module_param(bigendian,         int, 0644);
module_param(irq_iswitch,       int, 0644);
module_param(combfilter,        int, 0444);
module_param(lumafilter,        int, 0444);
module_param(automute,          int, 0444);
module_param(chroma_agc,        int, 0444);
module_param(adc_crush,         int, 0444);
module_param(whitecrush_upper,  int, 0444);
module_param(whitecrush_lower,  int, 0444);
module_param(vcr_hack,          int, 0444);
module_param(uv_ratio,          int, 0444);
module_param(full_luma_range,   int, 0444);
module_param(coring,            int, 0444);

module_param_array(radio, int, NULL, 0444);

MODULE_PARM_DESC(radio,"The TV card supports radio, default is 0 (no)");
MODULE_PARM_DESC(bigendian,"byte order of the framebuffer, default is native endian");
MODULE_PARM_DESC(bttv_verbose,"verbose startup messages, default is 1 (yes)");
MODULE_PARM_DESC(bttv_gpio,"log gpio changes, default is 0 (no)");
MODULE_PARM_DESC(bttv_debug,"debug messages, default is 0 (no)");
MODULE_PARM_DESC(irq_debug,"irq handler debug messages, default is 0 (no)");
MODULE_PARM_DESC(gbuffers,"number of capture buffers. range 2-32, default 8");
MODULE_PARM_DESC(gbufsize,"size of the capture buffers, default is 0x208000");
MODULE_PARM_DESC(automute,"mute audio on bad/missing video signal, default is 1 (yes)");
MODULE_PARM_DESC(chroma_agc,"enables the AGC of chroma signal, default is 0 (no)");
MODULE_PARM_DESC(adc_crush,"enables the luminance ADC crush, default is 1 (yes)");
MODULE_PARM_DESC(whitecrush_upper,"sets the white crush upper value, default is 207");
MODULE_PARM_DESC(whitecrush_lower,"sets the white crush lower value, default is 127");
MODULE_PARM_DESC(vcr_hack,"enables the VCR hack (improves synch on poor VCR tapes), default is 0 (no)");
MODULE_PARM_DESC(irq_iswitch,"switch inputs in irq handler");
MODULE_PARM_DESC(uv_ratio,"ratio between u and v gains, default is 50");
MODULE_PARM_DESC(full_luma_range,"use the full luma range, default is 0 (no)");
MODULE_PARM_DESC(coring,"set the luma coring level, default is 0 (no)");

MODULE_DESCRIPTION("bttv - v4l/v4l2 driver module for bt848/878 based cards");
MODULE_AUTHOR("Ralph Metzler & Marcus Metzler & Gerd Knorr");
MODULE_LICENSE("GPL");

/* ----------------------------------------------------------------------- */
/* sysfs                                                                   */

static ssize_t show_card(struct class_device *cd, char *buf)
{
	struct video_device *vfd = to_video_device(cd);
	struct bttv *btv = dev_get_drvdata(vfd->dev);
	return sprintf(buf, "%d\n", btv ? btv->c.type : UNSET);
}
static CLASS_DEVICE_ATTR(card, S_IRUGO, show_card, NULL);

/* ----------------------------------------------------------------------- */
/* static data                                                             */

/* special timing tables from conexant... */
static u8 SRAM_Table[][60] =
{
	/* PAL digital input over GPIO[7:0] */
	{
		45, // 45 bytes following
		0x36,0x11,0x01,0x00,0x90,0x02,0x05,0x10,0x04,0x16,
		0x12,0x05,0x11,0x00,0x04,0x12,0xC0,0x00,0x31,0x00,
		0x06,0x51,0x08,0x03,0x89,0x08,0x07,0xC0,0x44,0x00,
		0x81,0x01,0x01,0xA9,0x0D,0x02,0x02,0x50,0x03,0x37,
		0x37,0x00,0xAF,0x21,0x00
	},
	/* NTSC digital input over GPIO[7:0] */
	{
		51, // 51 bytes following
		0x0C,0xC0,0x00,0x00,0x90,0x02,0x03,0x10,0x03,0x06,
		0x10,0x04,0x12,0x12,0x05,0x02,0x13,0x04,0x19,0x00,
		0x04,0x39,0x00,0x06,0x59,0x08,0x03,0x83,0x08,0x07,
		0x03,0x50,0x00,0xC0,0x40,0x00,0x86,0x01,0x01,0xA6,
		0x0D,0x02,0x03,0x11,0x01,0x05,0x37,0x00,0xAC,0x21,
		0x00,
	},
	// TGB_NTSC392 // quartzsight
	// This table has been modified to be used for Fusion Rev D
	{
		0x2A, // size of table = 42
		0x06, 0x08, 0x04, 0x0a, 0xc0, 0x00, 0x18, 0x08, 0x03, 0x24,
		0x08, 0x07, 0x02, 0x90, 0x02, 0x08, 0x10, 0x04, 0x0c, 0x10,
		0x05, 0x2c, 0x11, 0x04, 0x55, 0x48, 0x00, 0x05, 0x50, 0x00,
		0xbf, 0x0c, 0x02, 0x2f, 0x3d, 0x00, 0x2f, 0x3f, 0x00, 0xc3,
		0x20, 0x00
	}
};

const struct bttv_tvnorm bttv_tvnorms[] = {
	/* PAL-BDGHI */
	/* max. active video is actually 922, but 924 is divisible by 4 and 3! */
	/* actually, max active PAL with HSCALE=0 is 948, NTSC is 768 - nil */
	{
		.v4l2_id        = V4L2_STD_PAL,
		.name           = "PAL",
		.Fsc            = 35468950,
		.swidth         = 924,
		.sheight        = 576,
		.totalwidth     = 1135,
		.adelay         = 0x7f,
		.bdelay         = 0x72,
		.iform          = (BT848_IFORM_PAL_BDGHI|BT848_IFORM_XT1),
		.scaledtwidth   = 1135,
		.hdelayx1       = 186,
		.hactivex1      = 924,
		.vdelay         = 0x20,
		.vbipack        = 255,
		.sram           = 0,
	},{
		.v4l2_id        = V4L2_STD_NTSC_M,
		.name           = "NTSC",
		.Fsc            = 28636363,
		.swidth         = 768,
		.sheight        = 480,
		.totalwidth     = 910,
		.adelay         = 0x68,
		.bdelay         = 0x5d,
		.iform          = (BT848_IFORM_NTSC|BT848_IFORM_XT0),
		.scaledtwidth   = 910,
		.hdelayx1       = 128,
		.hactivex1      = 910,
		.vdelay         = 0x1a,
		.vbipack        = 144,
		.sram           = 1,
	},{
		.v4l2_id        = V4L2_STD_SECAM,
		.name           = "SECAM",
		.Fsc            = 35468950,
		.swidth         = 924,
		.sheight        = 576,
		.totalwidth     = 1135,
		.adelay         = 0x7f,
		.bdelay         = 0xb0,
		.iform          = (BT848_IFORM_SECAM|BT848_IFORM_XT1),
		.scaledtwidth   = 1135,
		.hdelayx1       = 186,
		.hactivex1      = 922,
		.vdelay         = 0x20,
		.vbipack        = 255,
		.sram           = 0, /* like PAL, correct? */
	},{
		.v4l2_id        = V4L2_STD_PAL_Nc,
		.name           = "PAL-Nc",
		.Fsc            = 28636363,
		.swidth         = 640,
		.sheight        = 576,
		.totalwidth     = 910,
		.adelay         = 0x68,
		.bdelay         = 0x5d,
		.iform          = (BT848_IFORM_PAL_NC|BT848_IFORM_XT0),
		.scaledtwidth   = 780,
		.hdelayx1       = 130,
		.hactivex1      = 734,
		.vdelay         = 0x1a,
		.vbipack        = 144,
		.sram           = -1,
	},{
		.v4l2_id        = V4L2_STD_PAL_M,
		.name           = "PAL-M",
		.Fsc            = 28636363,
		.swidth         = 640,
		.sheight        = 480,
		.totalwidth     = 910,
		.adelay         = 0x68,
		.bdelay         = 0x5d,
		.iform          = (BT848_IFORM_PAL_M|BT848_IFORM_XT0),
		.scaledtwidth   = 780,
		.hdelayx1       = 135,
		.hactivex1      = 754,
		.vdelay         = 0x1a,
		.vbipack        = 144,
		.sram           = -1,
	},{
		.v4l2_id        = V4L2_STD_PAL_N,
		.name           = "PAL-N",
		.Fsc            = 35468950,
		.swidth         = 768,
		.sheight        = 576,
		.totalwidth     = 1135,
		.adelay         = 0x7f,
		.bdelay         = 0x72,
		.iform          = (BT848_IFORM_PAL_N|BT848_IFORM_XT1),
		.scaledtwidth   = 944,
		.hdelayx1       = 186,
		.hactivex1      = 922,
		.vdelay         = 0x20,
		.vbipack        = 144,
		.sram           = -1,
	},{
		.v4l2_id        = V4L2_STD_NTSC_M_JP,
		.name           = "NTSC-JP",
		.Fsc            = 28636363,
		.swidth         = 640,
		.sheight        = 480,
		.totalwidth     = 910,
		.adelay         = 0x68,
		.bdelay         = 0x5d,
		.iform          = (BT848_IFORM_NTSC_J|BT848_IFORM_XT0),
		.scaledtwidth   = 780,
		.hdelayx1       = 135,
		.hactivex1      = 754,
		.vdelay         = 0x16,
		.vbipack        = 144,
		.sram           = -1,
	},{
		/* that one hopefully works with the strange timing
		 * which video recorders produce when playing a NTSC
		 * tape on a PAL TV ... */
		.v4l2_id        = V4L2_STD_PAL_60,
		.name           = "PAL-60",
		.Fsc            = 35468950,
		.swidth         = 924,
		.sheight        = 480,
		.totalwidth     = 1135,
		.adelay         = 0x7f,
		.bdelay         = 0x72,
		.iform          = (BT848_IFORM_PAL_BDGHI|BT848_IFORM_XT1),
		.scaledtwidth   = 1135,
		.hdelayx1       = 186,
		.hactivex1      = 924,
		.vdelay         = 0x1a,
		.vbipack        = 255,
		.vtotal         = 524,
		.sram           = -1,
	}
};
static const unsigned int BTTV_TVNORMS = ARRAY_SIZE(bttv_tvnorms);

/* ----------------------------------------------------------------------- */
/* bttv format list
   packed pixel formats must come first */
static const struct bttv_format bttv_formats[] = {
	{
		.name     = "8 bpp, gray",
		.palette  = VIDEO_PALETTE_GREY,
		.fourcc   = V4L2_PIX_FMT_GREY,
		.btformat = BT848_COLOR_FMT_Y8,
		.depth    = 8,
		.flags    = FORMAT_FLAGS_PACKED,
	},{
		.name     = "8 bpp, dithered color",
		.palette  = VIDEO_PALETTE_HI240,
		.fourcc   = V4L2_PIX_FMT_HI240,
		.btformat = BT848_COLOR_FMT_RGB8,
		.depth    = 8,
		.flags    = FORMAT_FLAGS_PACKED | FORMAT_FLAGS_DITHER,
	},{
		.name     = "15 bpp RGB, le",
		.palette  = VIDEO_PALETTE_RGB555,
		.fourcc   = V4L2_PIX_FMT_RGB555,
		.btformat = BT848_COLOR_FMT_RGB15,
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	},{
		.name     = "15 bpp RGB, be",
		.palette  = -1,
		.fourcc   = V4L2_PIX_FMT_RGB555X,
		.btformat = BT848_COLOR_FMT_RGB15,
		.btswap   = 0x03, /* byteswap */
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	},{
		.name     = "16 bpp RGB, le",
		.palette  = VIDEO_PALETTE_RGB565,
		.fourcc   = V4L2_PIX_FMT_RGB565,
		.btformat = BT848_COLOR_FMT_RGB16,
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	},{
		.name     = "16 bpp RGB, be",
		.palette  = -1,
		.fourcc   = V4L2_PIX_FMT_RGB565X,
		.btformat = BT848_COLOR_FMT_RGB16,
		.btswap   = 0x03, /* byteswap */
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	},{
		.name     = "24 bpp RGB, le",
		.palette  = VIDEO_PALETTE_RGB24,
		.fourcc   = V4L2_PIX_FMT_BGR24,
		.btformat = BT848_COLOR_FMT_RGB24,
		.depth    = 24,
		.flags    = FORMAT_FLAGS_PACKED,
	},{
		.name     = "32 bpp RGB, le",
		.palette  = VIDEO_PALETTE_RGB32,
		.fourcc   = V4L2_PIX_FMT_BGR32,
		.btformat = BT848_COLOR_FMT_RGB32,
		.depth    = 32,
		.flags    = FORMAT_FLAGS_PACKED,
	},{
		.name     = "32 bpp RGB, be",
		.palette  = -1,
		.fourcc   = V4L2_PIX_FMT_RGB32,
		.btformat = BT848_COLOR_FMT_RGB32,
		.btswap   = 0x0f, /* byte+word swap */
		.depth    = 32,
		.flags    = FORMAT_FLAGS_PACKED,
	},{
		.name     = "4:2:2, packed, YUYV",
		.palette  = VIDEO_PALETTE_YUV422,
		.fourcc   = V4L2_PIX_FMT_YUYV,
		.btformat = BT848_COLOR_FMT_YUY2,
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	},{
		.name     = "4:2:2, packed, YUYV",
		.palette  = VIDEO_PALETTE_YUYV,
		.fourcc   = V4L2_PIX_FMT_YUYV,
		.btformat = BT848_COLOR_FMT_YUY2,
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	},{
		.name     = "4:2:2, packed, UYVY",
		.palette  = VIDEO_PALETTE_UYVY,
		.fourcc   = V4L2_PIX_FMT_UYVY,
		.btformat = BT848_COLOR_FMT_YUY2,
		.btswap   = 0x03, /* byteswap */
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PACKED,
	},{
		.name     = "4:2:2, planar, Y-Cb-Cr",
		.palette  = VIDEO_PALETTE_YUV422P,
		.fourcc   = V4L2_PIX_FMT_YUV422P,
		.btformat = BT848_COLOR_FMT_YCrCb422,
		.depth    = 16,
		.flags    = FORMAT_FLAGS_PLANAR,
		.hshift   = 1,
		.vshift   = 0,
	},{
		.name     = "4:2:0, planar, Y-Cb-Cr",
		.palette  = VIDEO_PALETTE_YUV420P,
		.fourcc   = V4L2_PIX_FMT_YUV420,
		.btformat = BT848_COLOR_FMT_YCrCb422,
		.depth    = 12,
		.flags    = FORMAT_FLAGS_PLANAR,
		.hshift   = 1,
		.vshift   = 1,
	},{
		.name     = "4:2:0, planar, Y-Cr-Cb",
		.palette  = -1,
		.fourcc   = V4L2_PIX_FMT_YVU420,
		.btformat = BT848_COLOR_FMT_YCrCb422,
		.depth    = 12,
		.flags    = FORMAT_FLAGS_PLANAR | FORMAT_FLAGS_CrCb,
		.hshift   = 1,
		.vshift   = 1,
	},{
		.name     = "4:1:1, planar, Y-Cb-Cr",
		.palette  = VIDEO_PALETTE_YUV411P,
		.fourcc   = V4L2_PIX_FMT_YUV411P,
		.btformat = BT848_COLOR_FMT_YCrCb411,
		.depth    = 12,
		.flags    = FORMAT_FLAGS_PLANAR,
		.hshift   = 2,
		.vshift   = 0,
	},{
		.name     = "4:1:0, planar, Y-Cb-Cr",
		.palette  = VIDEO_PALETTE_YUV410P,
		.fourcc   = V4L2_PIX_FMT_YUV410,
		.btformat = BT848_COLOR_FMT_YCrCb411,
		.depth    = 9,
		.flags    = FORMAT_FLAGS_PLANAR,
		.hshift   = 2,
		.vshift   = 2,
	},{
		.name     = "4:1:0, planar, Y-Cr-Cb",
		.palette  = -1,
		.fourcc   = V4L2_PIX_FMT_YVU410,
		.btformat = BT848_COLOR_FMT_YCrCb411,
		.depth    = 9,
		.flags    = FORMAT_FLAGS_PLANAR | FORMAT_FLAGS_CrCb,
		.hshift   = 2,
		.vshift   = 2,
	},{
		.name     = "raw scanlines",
		.palette  = VIDEO_PALETTE_RAW,
		.fourcc   = -1,
		.btformat = BT848_COLOR_FMT_RAW,
		.depth    = 8,
		.flags    = FORMAT_FLAGS_RAW,
	}
};
static const unsigned int BTTV_FORMATS = ARRAY_SIZE(bttv_formats);

/* ----------------------------------------------------------------------- */

#define V4L2_CID_PRIVATE_CHROMA_AGC  (V4L2_CID_PRIVATE_BASE + 0)
#define V4L2_CID_PRIVATE_COMBFILTER  (V4L2_CID_PRIVATE_BASE + 1)
#define V4L2_CID_PRIVATE_AUTOMUTE    (V4L2_CID_PRIVATE_BASE + 2)
#define V4L2_CID_PRIVATE_LUMAFILTER  (V4L2_CID_PRIVATE_BASE + 3)
#define V4L2_CID_PRIVATE_AGC_CRUSH   (V4L2_CID_PRIVATE_BASE + 4)
#define V4L2_CID_PRIVATE_VCR_HACK    (V4L2_CID_PRIVATE_BASE + 5)
#define V4L2_CID_PRIVATE_WHITECRUSH_UPPER   (V4L2_CID_PRIVATE_BASE + 6)
#define V4L2_CID_PRIVATE_WHITECRUSH_LOWER   (V4L2_CID_PRIVATE_BASE + 7)
#define V4L2_CID_PRIVATE_UV_RATIO    (V4L2_CID_PRIVATE_BASE + 8)
#define V4L2_CID_PRIVATE_FULL_LUMA_RANGE    (V4L2_CID_PRIVATE_BASE + 9)
#define V4L2_CID_PRIVATE_CORING      (V4L2_CID_PRIVATE_BASE + 10)
#define V4L2_CID_PRIVATE_LASTP1      (V4L2_CID_PRIVATE_BASE + 11)

static const struct v4l2_queryctrl no_ctl = {
	.name  = "42",
	.flags = V4L2_CTRL_FLAG_DISABLED,
};
static const struct v4l2_queryctrl bttv_ctls[] = {
	/* --- video --- */
	{
		.id            = V4L2_CID_BRIGHTNESS,
		.name          = "Brightness",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 256,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_CONTRAST,
		.name          = "Contrast",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 128,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_SATURATION,
		.name          = "Saturation",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 128,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_HUE,
		.name          = "Hue",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 256,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},
	/* --- audio --- */
	{
		.id            = V4L2_CID_AUDIO_MUTE,
		.name          = "Mute",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_AUDIO_VOLUME,
		.name          = "Volume",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 65535,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_AUDIO_BALANCE,
		.name          = "Balance",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_AUDIO_BASS,
		.name          = "Bass",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_AUDIO_TREBLE,
		.name          = "Treble",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},
	/* --- private --- */
	{
		.id            = V4L2_CID_PRIVATE_CHROMA_AGC,
		.name          = "chroma agc",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_PRIVATE_COMBFILTER,
		.name          = "combfilter",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_PRIVATE_AUTOMUTE,
		.name          = "automute",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_PRIVATE_LUMAFILTER,
		.name          = "luma decimation filter",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_PRIVATE_AGC_CRUSH,
		.name          = "agc crush",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_PRIVATE_VCR_HACK,
		.name          = "vcr hack",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_PRIVATE_WHITECRUSH_UPPER,
		.name          = "whitecrush upper",
		.minimum       = 0,
		.maximum       = 255,
		.step          = 1,
		.default_value = 0xCF,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_PRIVATE_WHITECRUSH_LOWER,
		.name          = "whitecrush lower",
		.minimum       = 0,
		.maximum       = 255,
		.step          = 1,
		.default_value = 0x7F,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_PRIVATE_UV_RATIO,
		.name          = "uv ratio",
		.minimum       = 0,
		.maximum       = 100,
		.step          = 1,
		.default_value = 50,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_PRIVATE_FULL_LUMA_RANGE,
		.name          = "full luma range",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_PRIVATE_CORING,
		.name          = "coring",
		.minimum       = 0,
		.maximum       = 3,
		.step          = 1,
		.default_value = 0,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	}



};
static const int BTTV_CTLS = ARRAY_SIZE(bttv_ctls);

/* ----------------------------------------------------------------------- */
/* resource management                                                     */

static
int check_alloc_btres(struct bttv *btv, struct bttv_fh *fh, int bit)
{
	if (fh->resources & bit)
		/* have it already allocated */
		return 1;

	/* is it free? */
	down(&btv->reslock);
	if (btv->resources & bit) {
		/* no, someone else uses it */
		up(&btv->reslock);
		return 0;
	}
	/* it's free, grab it */
	fh->resources  |= bit;
	btv->resources |= bit;
	up(&btv->reslock);
	return 1;
}

static
int check_btres(struct bttv_fh *fh, int bit)
{
	return (fh->resources & bit);
}

static
int locked_btres(struct bttv *btv, int bit)
{
	return (btv->resources & bit);
}

static
void free_btres(struct bttv *btv, struct bttv_fh *fh, int bits)
{
	if ((fh->resources & bits) != bits) {
		/* trying to free ressources not allocated by us ... */
		printk("bttv: BUG! (btres)\n");
	}
	down(&btv->reslock);
	fh->resources  &= ~bits;
	btv->resources &= ~bits;
	up(&btv->reslock);
}

/* ----------------------------------------------------------------------- */
/* If Bt848a or Bt849, use PLL for PAL/SECAM and crystal for NTSC          */

/* Frequency = (F_input / PLL_X) * PLL_I.PLL_F/PLL_C
   PLL_X = Reference pre-divider (0=1, 1=2)
   PLL_C = Post divider (0=6, 1=4)
   PLL_I = Integer input
   PLL_F = Fractional input

   F_input = 28.636363 MHz:
   PAL (CLKx2 = 35.46895 MHz): PLL_X = 1, PLL_I = 0x0E, PLL_F = 0xDCF9, PLL_C = 0
*/

static void set_pll_freq(struct bttv *btv, unsigned int fin, unsigned int fout)
{
        unsigned char fl, fh, fi;

        /* prevent overflows */
        fin/=4;
        fout/=4;

        fout*=12;
        fi=fout/fin;

        fout=(fout%fin)*256;
        fh=fout/fin;

        fout=(fout%fin)*256;
        fl=fout/fin;

        btwrite(fl, BT848_PLL_F_LO);
        btwrite(fh, BT848_PLL_F_HI);
        btwrite(fi|BT848_PLL_X, BT848_PLL_XCI);
}

static void set_pll(struct bttv *btv)
{
        int i;

        if (!btv->pll.pll_crystal)
                return;

	if (btv->pll.pll_ofreq == btv->pll.pll_current) {
		dprintk("bttv%d: PLL: no change required\n",btv->c.nr);
                return;
        }

        if (btv->pll.pll_ifreq == btv->pll.pll_ofreq) {
                /* no PLL needed */
                if (btv->pll.pll_current == 0)
                        return;
		bttv_printk(KERN_INFO "bttv%d: PLL can sleep, using XTAL (%d).\n",
                           btv->c.nr,btv->pll.pll_ifreq);
                btwrite(0x00,BT848_TGCTRL);
                btwrite(0x00,BT848_PLL_XCI);
                btv->pll.pll_current = 0;
                return;
        }

	bttv_printk(KERN_INFO "bttv%d: PLL: %d => %d ",btv->c.nr,
                   btv->pll.pll_ifreq, btv->pll.pll_ofreq);
	set_pll_freq(btv, btv->pll.pll_ifreq, btv->pll.pll_ofreq);

        for (i=0; i<10; i++) {
		/*  Let other people run while the PLL stabilizes */
		bttv_printk(".");
		msleep(10);

                if (btread(BT848_DSTATUS) & BT848_DSTATUS_PLOCK) {
			btwrite(0,BT848_DSTATUS);
                } else {
                        btwrite(0x08,BT848_TGCTRL);
                        btv->pll.pll_current = btv->pll.pll_ofreq;
			bttv_printk(" ok\n");
                        return;
                }
        }
        btv->pll.pll_current = -1;
	bttv_printk("failed\n");
        return;
}

/* used to switch between the bt848's analog/digital video capture modes */
static void bt848A_set_timing(struct bttv *btv)
{
	int i, len;
	int table_idx = bttv_tvnorms[btv->tvnorm].sram;
	int fsc       = bttv_tvnorms[btv->tvnorm].Fsc;

	if (UNSET == bttv_tvcards[btv->c.type].muxsel[btv->input]) {
		dprintk("bttv%d: load digital timing table (table_idx=%d)\n",
			btv->c.nr,table_idx);

		/* timing change...reset timing generator address */
		btwrite(0x00, BT848_TGCTRL);
		btwrite(0x02, BT848_TGCTRL);
		btwrite(0x00, BT848_TGCTRL);

		len=SRAM_Table[table_idx][0];
		for(i = 1; i <= len; i++)
			btwrite(SRAM_Table[table_idx][i],BT848_TGLB);
		btv->pll.pll_ofreq = 27000000;

		set_pll(btv);
		btwrite(0x11, BT848_TGCTRL);
		btwrite(0x41, BT848_DVSIF);
	} else {
		btv->pll.pll_ofreq = fsc;
		set_pll(btv);
		btwrite(0x0, BT848_DVSIF);
	}
}

/* ----------------------------------------------------------------------- */

static void bt848_bright(struct bttv *btv, int bright)
{
	int value;

	// printk("bttv: set bright: %d\n",bright); // DEBUG
	btv->bright = bright;

	/* We want -128 to 127 we get 0-65535 */
	value = (bright >> 8) - 128;
	btwrite(value & 0xff, BT848_BRIGHT);
}

static void bt848_hue(struct bttv *btv, int hue)
{
	int value;

	btv->hue = hue;

	/* -128 to 127 */
	value = (hue >> 8) - 128;
	btwrite(value & 0xff, BT848_HUE);
}

static void bt848_contrast(struct bttv *btv, int cont)
{
	int value,hibit;

	btv->contrast = cont;

	/* 0-511 */
	value = (cont  >> 7);
	hibit = (value >> 6) & 4;
	btwrite(value & 0xff, BT848_CONTRAST_LO);
	btaor(hibit, ~4, BT848_E_CONTROL);
	btaor(hibit, ~4, BT848_O_CONTROL);
}

static void bt848_sat(struct bttv *btv, int color)
{
	int val_u,val_v,hibits;

	btv->saturation = color;

	/* 0-511 for the color */
	val_u   = ((color * btv->opt_uv_ratio) / 50) >> 7;
	val_v   = (((color * (100 - btv->opt_uv_ratio) / 50) >>7)*180L)/254;
	hibits  = (val_u >> 7) & 2;
	hibits |= (val_v >> 8) & 1;
	btwrite(val_u & 0xff, BT848_SAT_U_LO);
	btwrite(val_v & 0xff, BT848_SAT_V_LO);
	btaor(hibits, ~3, BT848_E_CONTROL);
	btaor(hibits, ~3, BT848_O_CONTROL);
}

/* ----------------------------------------------------------------------- */

static int
video_mux(struct bttv *btv, unsigned int input)
{
	int mux,mask2;

	if (input >= bttv_tvcards[btv->c.type].video_inputs)
		return -EINVAL;

	/* needed by RemoteVideo MX */
	mask2 = bttv_tvcards[btv->c.type].gpiomask2;
	if (mask2)
		gpio_inout(mask2,mask2);

	if (input == btv->svhs)  {
		btor(BT848_CONTROL_COMP, BT848_E_CONTROL);
		btor(BT848_CONTROL_COMP, BT848_O_CONTROL);
	} else {
		btand(~BT848_CONTROL_COMP, BT848_E_CONTROL);
		btand(~BT848_CONTROL_COMP, BT848_O_CONTROL);
	}
	mux = bttv_tvcards[btv->c.type].muxsel[input] & 3;
	btaor(mux<<5, ~(3<<5), BT848_IFORM);
	dprintk(KERN_DEBUG "bttv%d: video mux: input=%d mux=%d\n",
		btv->c.nr,input,mux);

	/* card specific hook */
	if(bttv_tvcards[btv->c.type].muxsel_hook)
		bttv_tvcards[btv->c.type].muxsel_hook (btv, input);
	return 0;
}

static char *audio_modes[] = {
	"audio: tuner", "audio: radio", "audio: extern",
	"audio: intern", "audio: off"
};

static int
audio_mux(struct bttv *btv, int mode)
{
	int val,mux,i2c_mux,signal;

	gpio_inout(bttv_tvcards[btv->c.type].gpiomask,
		   bttv_tvcards[btv->c.type].gpiomask);
	signal = btread(BT848_DSTATUS) & BT848_DSTATUS_HLOC;

	switch (mode) {
	case AUDIO_MUTE:
		btv->audio |= AUDIO_MUTE;
		break;
	case AUDIO_UNMUTE:
		btv->audio &= ~AUDIO_MUTE;
		break;
	case AUDIO_TUNER:
	case AUDIO_RADIO:
	case AUDIO_EXTERN:
	case AUDIO_INTERN:
		btv->audio &= AUDIO_MUTE;
		btv->audio |= mode;
	}
	i2c_mux = mux = (btv->audio & AUDIO_MUTE) ? AUDIO_OFF : btv->audio;
	if (btv->opt_automute && !signal && !btv->radio_user)
		mux = AUDIO_OFF;

	val = bttv_tvcards[btv->c.type].audiomux[mux];
	gpio_bits(bttv_tvcards[btv->c.type].gpiomask,val);
	if (bttv_gpio)
		bttv_gpio_tracking(btv,audio_modes[mux]);
	if (!in_interrupt())
		bttv_call_i2c_clients(btv,AUDC_SET_INPUT,&(i2c_mux));
	return 0;
}

static void
i2c_vidiocschan(struct bttv *btv)
{
	struct video_channel c;

	memset(&c,0,sizeof(c));
	c.norm    = btv->tvnorm;
	c.channel = btv->input;
	bttv_call_i2c_clients(btv,VIDIOCSCHAN,&c);
	if (btv->c.type == BTTV_BOARD_VOODOOTV_FM)
		bttv_tda9880_setnorm(btv,c.norm);
}

static int
set_tvnorm(struct bttv *btv, unsigned int norm)
{
	const struct bttv_tvnorm *tvnorm;

	if (norm < 0 || norm >= BTTV_TVNORMS)
		return -EINVAL;

	btv->tvnorm = norm;
	tvnorm = &bttv_tvnorms[norm];

	btwrite(tvnorm->adelay, BT848_ADELAY);
	btwrite(tvnorm->bdelay, BT848_BDELAY);
	btaor(tvnorm->iform,~(BT848_IFORM_NORM|BT848_IFORM_XTBOTH),
	      BT848_IFORM);
	btwrite(tvnorm->vbipack, BT848_VBI_PACK_SIZE);
	btwrite(1, BT848_VBI_PACK_DEL);
	bt848A_set_timing(btv);

	switch (btv->c.type) {
	case BTTV_BOARD_VOODOOTV_FM:
		bttv_tda9880_setnorm(btv,norm);
		break;
	}
	return 0;
}

static void
set_input(struct bttv *btv, unsigned int input)
{
	unsigned long flags;

	btv->input = input;
	if (irq_iswitch) {
		spin_lock_irqsave(&btv->s_lock,flags);
		if (btv->curr.frame_irq) {
			/* active capture -> delayed input switch */
			btv->new_input = input;
		} else {
			video_mux(btv,input);
		}
		spin_unlock_irqrestore(&btv->s_lock,flags);
	} else {
		video_mux(btv,input);
	}
	audio_mux(btv,(input == bttv_tvcards[btv->c.type].tuner ?
		       AUDIO_TUNER : AUDIO_EXTERN));
	set_tvnorm(btv,btv->tvnorm);
	i2c_vidiocschan(btv);
}

static void init_irqreg(struct bttv *btv)
{
	/* clear status */
	btwrite(0xfffffUL, BT848_INT_STAT);

	if (bttv_tvcards[btv->c.type].no_video) {
		/* i2c only */
		btwrite(BT848_INT_I2CDONE,
			BT848_INT_MASK);
	} else {
		/* full video */
		btwrite((btv->triton1)  |
			(btv->gpioirq ? BT848_INT_GPINT : 0) |
			BT848_INT_SCERR |
			(fdsr ? BT848_INT_FDSR : 0) |
			BT848_INT_RISCI|BT848_INT_OCERR|BT848_INT_VPRES|
			BT848_INT_FMTCHG|BT848_INT_HLOCK|
			BT848_INT_I2CDONE,
			BT848_INT_MASK);
	}
}

static void init_bt848(struct bttv *btv)
{
	int val;

	if (bttv_tvcards[btv->c.type].no_video) {
		/* very basic init only */
		init_irqreg(btv);
		return;
	}

	btwrite(0x00, BT848_CAP_CTL);
	btwrite(BT848_COLOR_CTL_GAMMA, BT848_COLOR_CTL);
	btwrite(BT848_IFORM_XTAUTO | BT848_IFORM_AUTO, BT848_IFORM);

	/* set planar and packed mode trigger points and         */
	/* set rising edge of inverted GPINTR pin as irq trigger */
	btwrite(BT848_GPIO_DMA_CTL_PKTP_32|
		BT848_GPIO_DMA_CTL_PLTP1_16|
		BT848_GPIO_DMA_CTL_PLTP23_16|
		BT848_GPIO_DMA_CTL_GPINTC|
		BT848_GPIO_DMA_CTL_GPINTI,
		BT848_GPIO_DMA_CTL);

	val = btv->opt_chroma_agc ? BT848_SCLOOP_CAGC : 0;
	btwrite(val, BT848_E_SCLOOP);
	btwrite(val, BT848_O_SCLOOP);

	btwrite(0x20, BT848_E_VSCALE_HI);
	btwrite(0x20, BT848_O_VSCALE_HI);
	btwrite(BT848_ADC_RESERVED | (btv->opt_adc_crush ? BT848_ADC_CRUSH : 0),
		BT848_ADC);

	btwrite(whitecrush_upper, BT848_WC_UP);
	btwrite(whitecrush_lower, BT848_WC_DOWN);

	if (btv->opt_lumafilter) {
		btwrite(0, BT848_E_CONTROL);
		btwrite(0, BT848_O_CONTROL);
	} else {
		btwrite(BT848_CONTROL_LDEC, BT848_E_CONTROL);
		btwrite(BT848_CONTROL_LDEC, BT848_O_CONTROL);
	}

	bt848_bright(btv,   btv->bright);
	bt848_hue(btv,      btv->hue);
	bt848_contrast(btv, btv->contrast);
	bt848_sat(btv,      btv->saturation);

	/* interrupt */
	init_irqreg(btv);
}

static void bttv_reinit_bt848(struct bttv *btv)
{
	unsigned long flags;

	if (bttv_verbose)
		printk(KERN_INFO "bttv%d: reset, reinitialize\n",btv->c.nr);
	spin_lock_irqsave(&btv->s_lock,flags);
	btv->errors=0;
	bttv_set_dma(btv,0);
	spin_unlock_irqrestore(&btv->s_lock,flags);

	init_bt848(btv);
	btv->pll.pll_current = -1;
	set_input(btv,btv->input);
}

static int get_control(struct bttv *btv, struct v4l2_control *c)
{
	struct video_audio va;
	int i;

	for (i = 0; i < BTTV_CTLS; i++)
		if (bttv_ctls[i].id == c->id)
			break;
	if (i == BTTV_CTLS)
		return -EINVAL;
	if (i >= 4 && i <= 8) {
		memset(&va,0,sizeof(va));
		bttv_call_i2c_clients(btv, VIDIOCGAUDIO, &va);
		if (btv->audio_hook)
			btv->audio_hook(btv,&va,0);
	}
	switch (c->id) {
	case V4L2_CID_BRIGHTNESS:
		c->value = btv->bright;
		break;
	case V4L2_CID_HUE:
		c->value = btv->hue;
		break;
	case V4L2_CID_CONTRAST:
		c->value = btv->contrast;
		break;
	case V4L2_CID_SATURATION:
		c->value = btv->saturation;
		break;

	case V4L2_CID_AUDIO_MUTE:
		c->value = (VIDEO_AUDIO_MUTE & va.flags) ? 1 : 0;
		break;
	case V4L2_CID_AUDIO_VOLUME:
		c->value = va.volume;
		break;
	case V4L2_CID_AUDIO_BALANCE:
		c->value = va.balance;
		break;
	case V4L2_CID_AUDIO_BASS:
		c->value = va.bass;
		break;
	case V4L2_CID_AUDIO_TREBLE:
		c->value = va.treble;
		break;

	case V4L2_CID_PRIVATE_CHROMA_AGC:
		c->value = btv->opt_chroma_agc;
		break;
	case V4L2_CID_PRIVATE_COMBFILTER:
		c->value = btv->opt_combfilter;
		break;
	case V4L2_CID_PRIVATE_LUMAFILTER:
		c->value = btv->opt_lumafilter;
		break;
	case V4L2_CID_PRIVATE_AUTOMUTE:
		c->value = btv->opt_automute;
		break;
	case V4L2_CID_PRIVATE_AGC_CRUSH:
		c->value = btv->opt_adc_crush;
		break;
	case V4L2_CID_PRIVATE_VCR_HACK:
		c->value = btv->opt_vcr_hack;
		break;
	case V4L2_CID_PRIVATE_WHITECRUSH_UPPER:
		c->value = btv->opt_whitecrush_upper;
		break;
	case V4L2_CID_PRIVATE_WHITECRUSH_LOWER:
		c->value = btv->opt_whitecrush_lower;
		break;
	case V4L2_CID_PRIVATE_UV_RATIO:
		c->value = btv->opt_uv_ratio;
		break;
	case V4L2_CID_PRIVATE_FULL_LUMA_RANGE:
		c->value = btv->opt_full_luma_range;
		break;
	case V4L2_CID_PRIVATE_CORING:
		c->value = btv->opt_coring;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static int set_control(struct bttv *btv, struct v4l2_control *c)
{
	struct video_audio va;
	int i,val;

	for (i = 0; i < BTTV_CTLS; i++)
		if (bttv_ctls[i].id == c->id)
			break;
	if (i == BTTV_CTLS)
		return -EINVAL;
	if (i >= 4 && i <= 8) {
		memset(&va,0,sizeof(va));
		bttv_call_i2c_clients(btv, VIDIOCGAUDIO, &va);
		if (btv->audio_hook)
			btv->audio_hook(btv,&va,0);
	}
	switch (c->id) {
	case V4L2_CID_BRIGHTNESS:
		bt848_bright(btv,c->value);
		break;
	case V4L2_CID_HUE:
		bt848_hue(btv,c->value);
		break;
	case V4L2_CID_CONTRAST:
		bt848_contrast(btv,c->value);
		break;
	case V4L2_CID_SATURATION:
		bt848_sat(btv,c->value);
		break;
	case V4L2_CID_AUDIO_MUTE:
		if (c->value) {
			va.flags |= VIDEO_AUDIO_MUTE;
			audio_mux(btv, AUDIO_MUTE);
		} else {
			va.flags &= ~VIDEO_AUDIO_MUTE;
			audio_mux(btv, AUDIO_UNMUTE);
		}
		break;

	case V4L2_CID_AUDIO_VOLUME:
		va.volume = c->value;
		break;
	case V4L2_CID_AUDIO_BALANCE:
		va.balance = c->value;
		break;
	case V4L2_CID_AUDIO_BASS:
		va.bass = c->value;
		break;
	case V4L2_CID_AUDIO_TREBLE:
		va.treble = c->value;
		break;

	case V4L2_CID_PRIVATE_CHROMA_AGC:
		btv->opt_chroma_agc = c->value;
		val = btv->opt_chroma_agc ? BT848_SCLOOP_CAGC : 0;
		btwrite(val, BT848_E_SCLOOP);
		btwrite(val, BT848_O_SCLOOP);
		break;
	case V4L2_CID_PRIVATE_COMBFILTER:
		btv->opt_combfilter = c->value;
		break;
	case V4L2_CID_PRIVATE_LUMAFILTER:
		btv->opt_lumafilter = c->value;
		if (btv->opt_lumafilter) {
			btand(~BT848_CONTROL_LDEC, BT848_E_CONTROL);
			btand(~BT848_CONTROL_LDEC, BT848_O_CONTROL);
		} else {
			btor(BT848_CONTROL_LDEC, BT848_E_CONTROL);
			btor(BT848_CONTROL_LDEC, BT848_O_CONTROL);
		}
		break;
	case V4L2_CID_PRIVATE_AUTOMUTE:
		btv->opt_automute = c->value;
		break;
	case V4L2_CID_PRIVATE_AGC_CRUSH:
		btv->opt_adc_crush = c->value;
		btwrite(BT848_ADC_RESERVED | (btv->opt_adc_crush ? BT848_ADC_CRUSH : 0),
			BT848_ADC);
		break;
	case V4L2_CID_PRIVATE_VCR_HACK:
		btv->opt_vcr_hack = c->value;
		break;
	case V4L2_CID_PRIVATE_WHITECRUSH_UPPER:
		btv->opt_whitecrush_upper = c->value;
		btwrite(c->value, BT848_WC_UP);
		break;
	case V4L2_CID_PRIVATE_WHITECRUSH_LOWER:
		btv->opt_whitecrush_lower = c->value;
		btwrite(c->value, BT848_WC_DOWN);
		break;
	case V4L2_CID_PRIVATE_UV_RATIO:
		btv->opt_uv_ratio = c->value;
		bt848_sat(btv, btv->saturation);
		break;
	case V4L2_CID_PRIVATE_FULL_LUMA_RANGE:
		btv->opt_full_luma_range = c->value;
		btaor((c->value<<7), ~BT848_OFORM_RANGE, BT848_OFORM);
		break;
	case V4L2_CID_PRIVATE_CORING:
		btv->opt_coring = c->value;
		btaor((c->value<<5), ~BT848_OFORM_CORE32, BT848_OFORM);
		break;
	default:
		return -EINVAL;
	}
	if (i >= 4 && i <= 8) {
		bttv_call_i2c_clients(btv, VIDIOCSAUDIO, &va);
		if (btv->audio_hook)
			btv->audio_hook(btv,&va,1);
	}
	return 0;
}

/* ----------------------------------------------------------------------- */

void bttv_gpio_tracking(struct bttv *btv, char *comment)
{
	unsigned int outbits, data;
	outbits = btread(BT848_GPIO_OUT_EN);
	data    = btread(BT848_GPIO_DATA);
	printk(KERN_DEBUG "bttv%d: gpio: en=%08x, out=%08x in=%08x [%s]\n",
	       btv->c.nr,outbits,data & outbits, data & ~outbits, comment);
}

static void bttv_field_count(struct bttv *btv)
{
	int need_count = 0;

	if (btv->users)
		need_count++;

	if (need_count) {
		/* start field counter */
		btor(BT848_INT_VSYNC,BT848_INT_MASK);
	} else {
		/* stop field counter */
		btand(~BT848_INT_VSYNC,BT848_INT_MASK);
		btv->field_count = 0;
	}
}

static const struct bttv_format*
format_by_palette(int palette)
{
	unsigned int i;

	for (i = 0; i < BTTV_FORMATS; i++) {
		if (-1 == bttv_formats[i].palette)
			continue;
		if (bttv_formats[i].palette == palette)
			return bttv_formats+i;
	}
	return NULL;
}

static const struct bttv_format*
format_by_fourcc(int fourcc)
{
	unsigned int i;

	for (i = 0; i < BTTV_FORMATS; i++) {
		if (-1 == bttv_formats[i].fourcc)
			continue;
		if (bttv_formats[i].fourcc == fourcc)
			return bttv_formats+i;
	}
	return NULL;
}

/* ----------------------------------------------------------------------- */
/* misc helpers                                                            */

static int
bttv_switch_overlay(struct bttv *btv, struct bttv_fh *fh,
		    struct bttv_buffer *new)
{
	struct bttv_buffer *old;
	unsigned long flags;
	int retval = 0;

	dprintk("switch_overlay: enter [new=%p]\n",new);
	if (new)
		new->vb.state = STATE_DONE;
	spin_lock_irqsave(&btv->s_lock,flags);
	old = btv->screen;
	btv->screen = new;
	btv->loop_irq |= 1;
	bttv_set_dma(btv, 0x03);
	spin_unlock_irqrestore(&btv->s_lock,flags);
	if (NULL == new)
		free_btres(btv,fh,RESOURCE_OVERLAY);
	if (NULL != old) {
		dprintk("switch_overlay: old=%p state is %d\n",old,old->vb.state);
		bttv_dma_free(btv, old);
		kfree(old);
	}
	dprintk("switch_overlay: done\n");
	return retval;
}

/* ----------------------------------------------------------------------- */
/* video4linux (1) interface                                               */

static int bttv_prepare_buffer(struct bttv *btv, struct bttv_buffer *buf,
			       const struct bttv_format *fmt,
			       unsigned int width, unsigned int height,
			       enum v4l2_field field)
{
	int redo_dma_risc = 0;
	int rc;

	/* check settings */
	if (NULL == fmt)
		return -EINVAL;
	if (fmt->btformat == BT848_COLOR_FMT_RAW) {
		width  = RAW_BPL;
		height = RAW_LINES*2;
		if (width*height > buf->vb.bsize)
			return -EINVAL;
		buf->vb.size = buf->vb.bsize;
	} else {
		if (width  < 48 ||
		    height < 32 ||
		    width  > bttv_tvnorms[btv->tvnorm].swidth ||
		    height > bttv_tvnorms[btv->tvnorm].sheight)
			return -EINVAL;
		buf->vb.size = (width * height * fmt->depth) >> 3;
		if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
			return -EINVAL;
	}

	/* alloc + fill struct bttv_buffer (if changed) */
	if (buf->vb.width != width || buf->vb.height != height ||
	    buf->vb.field != field ||
	    buf->tvnorm != btv->tvnorm || buf->fmt != fmt) {
		buf->vb.width  = width;
		buf->vb.height = height;
		buf->vb.field  = field;
		buf->tvnorm    = btv->tvnorm;
		buf->fmt       = fmt;
		redo_dma_risc = 1;
	}

	/* alloc risc memory */
	if (STATE_NEEDS_INIT == buf->vb.state) {
		redo_dma_risc = 1;
		if (0 != (rc = videobuf_iolock(btv->c.pci,&buf->vb,&btv->fbuf)))
			goto fail;
	}

	if (redo_dma_risc)
		if (0 != (rc = bttv_buffer_risc(btv,buf)))
			goto fail;

	buf->vb.state = STATE_PREPARED;
	return 0;

 fail:
	bttv_dma_free(btv,buf);
	return rc;
}

static int
buffer_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
{
	struct bttv_fh *fh = q->priv_data;

	*size = fh->fmt->depth*fh->width*fh->height >> 3;
	if (0 == *count)
		*count = gbuffers;
	while (*size * *count > gbuffers * gbufsize)
		(*count)--;
	return 0;
}

static int
buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
	       enum v4l2_field field)
{
	struct bttv_buffer *buf = container_of(vb,struct bttv_buffer,vb);
	struct bttv_fh *fh = q->priv_data;

	return bttv_prepare_buffer(fh->btv, buf, fh->fmt,
				   fh->width, fh->height, field);
}

static void
buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
	struct bttv_buffer *buf = container_of(vb,struct bttv_buffer,vb);
	struct bttv_fh *fh = q->priv_data;
	struct bttv    *btv = fh->btv;

	buf->vb.state = STATE_QUEUED;
	list_add_tail(&buf->vb.queue,&btv->capture);
	if (!btv->curr.frame_irq) {
		btv->loop_irq |= 1;
		bttv_set_dma(btv, 0x03);
	}
}

static void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
	struct bttv_buffer *buf = container_of(vb,struct bttv_buffer,vb);
	struct bttv_fh *fh = q->priv_data;

	bttv_dma_free(fh->btv,buf);
}

static struct videobuf_queue_ops bttv_video_qops = {
	.buf_setup    = buffer_setup,
	.buf_prepare  = buffer_prepare,
	.buf_queue    = buffer_queue,
	.buf_release  = buffer_release,
};

static const char *v4l1_ioctls[] = {
	"?", "CGAP", "GCHAN", "SCHAN", "GTUNER", "STUNER", "GPICT", "SPICT",
	"CCAPTURE", "GWIN", "SWIN", "GFBUF", "SFBUF", "KEY", "GFREQ",
	"SFREQ", "GAUDIO", "SAUDIO", "SYNC", "MCAPTURE", "GMBUF", "GUNIT",
	"GCAPTURE", "SCAPTURE", "SPLAYMODE", "SWRITEMODE", "GPLAYINFO",
	"SMICROCODE", "GVBIFMT", "SVBIFMT" };
#define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)

static int bttv_common_ioctls(struct bttv *btv, unsigned int cmd, void *arg)
{
	switch (cmd) {
	case BTTV_VERSION:
		return BTTV_VERSION_CODE;

	/* ***  v4l1  *** ************************************************ */
	case VIDIOCGFREQ:
	{
		unsigned long *freq = arg;
		*freq = btv->freq;
		return 0;
	}
	case VIDIOCSFREQ:
	{
		unsigned long *freq = arg;
		down(&btv->lock);
		btv->freq=*freq;
		bttv_call_i2c_clients(btv,VIDIOCSFREQ,freq);
		if (btv->has_matchbox && btv->radio_user)
			tea5757_set_freq(btv,*freq);
		up(&btv->lock);
		return 0;
	}

	case VIDIOCGTUNER:
	{
		struct video_tuner *v = arg;

		if (UNSET == bttv_tvcards[btv->c.type].tuner)
			return -EINVAL;
		if (v->tuner) /* Only tuner 0 */
			return -EINVAL;
		strcpy(v->name, "Television");
		v->rangelow  = 0;
		v->rangehigh = 0x7FFFFFFF;
		v->flags     = VIDEO_TUNER_PAL|VIDEO_TUNER_NTSC|VIDEO_TUNER_SECAM;
		v->mode      = btv->tvnorm;
		v->signal    = (btread(BT848_DSTATUS)&BT848_DSTATUS_HLOC) ? 0xFFFF : 0;
		bttv_call_i2c_clients(btv,cmd,v);
		return 0;
	}
	case VIDIOCSTUNER:
	{
		struct video_tuner *v = arg;

		if (v->tuner) /* Only tuner 0 */
			return -EINVAL;
		if (v->mode >= BTTV_TVNORMS)
			return -EINVAL;

		down(&btv->lock);
		set_tvnorm(btv,v->mode);
		bttv_call_i2c_clients(btv,cmd,v);
		up(&btv->lock);
		return 0;
	}

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

		if (channel >= bttv_tvcards[btv->c.type].video_inputs)
			return -EINVAL;
		v->tuners=0;
		v->flags = VIDEO_VC_AUDIO;
		v->type = VIDEO_TYPE_CAMERA;
		v->norm = btv->tvnorm;
		if (channel == bttv_tvcards[btv->c.type].tuner)  {
			strcpy(v->name,"Television");
			v->flags|=VIDEO_VC_TUNER;
			v->type=VIDEO_TYPE_TV;
			v->tuners=1;
		} else if (channel == btv->svhs) {
			strcpy(v->name,"S-Video");
		} else {
			sprintf(v->name,"Composite%d",channel);
		}
		return 0;
	}
	case VIDIOCSCHAN:
	{
		struct video_channel *v = arg;
		unsigned int channel = v->channel;

		if (channel >= bttv_tvcards[btv->c.type].video_inputs)
			return -EINVAL;
		if (v->norm >= BTTV_TVNORMS)
			return -EINVAL;

		down(&btv->lock);
		if (channel == btv->input &&
		    v->norm == btv->tvnorm) {
			/* nothing to do */
			up(&btv->lock);
			return 0;
		}

		btv->tvnorm = v->norm;
		set_input(btv,v->channel);
		up(&btv->lock);
		return 0;
	}

	case VIDIOCGAUDIO:
	{
		struct video_audio *v = arg;

		memset(v,0,sizeof(*v));
		strcpy(v->name,"Television");
		v->flags |= VIDEO_AUDIO_MUTABLE;
		v->mode  = VIDEO_SOUND_MONO;

		down(&btv->lock);
		bttv_call_i2c_clients(btv,cmd,v);

		/* card specific hooks */
		if (btv->audio_hook)
			btv->audio_hook(btv,v,0);

		up(&btv->lock);
		return 0;
	}
	case VIDIOCSAUDIO:
	{
		struct video_audio *v = arg;
		unsigned int audio = v->audio;

		if (audio >= bttv_tvcards[btv->c.type].audio_inputs)
			return -EINVAL;

		down(&btv->lock);
		audio_mux(btv, (v->flags&VIDEO_AUDIO_MUTE) ? AUDIO_MUTE : AUDIO_UNMUTE);
		bttv_call_i2c_clients(btv,cmd,v);

		/* card specific hooks */
		if (btv->audio_hook)
			btv->audio_hook(btv,v,1);

		up(&btv->lock);
		return 0;
	}

	/* ***  v4l2  *** ************************************************ */
	case VIDIOC_ENUMSTD:
	{
		struct v4l2_standard *e = arg;
		unsigned int index = e->index;

		if (index >= BTTV_TVNORMS)
			return -EINVAL;
		v4l2_video_std_construct(e, bttv_tvnorms[e->index].v4l2_id,
					 bttv_tvnorms[e->index].name);
		e->index = index;
		return 0;
	}
	case VIDIOC_G_STD:
	{
		v4l2_std_id *id = arg;
		*id = bttv_tvnorms[btv->tvnorm].v4l2_id;
		return 0;
	}
	case VIDIOC_S_STD:
	{
		v4l2_std_id *id = arg;
		unsigned int i;

		for (i = 0; i < BTTV_TVNORMS; i++)
			if (*id & bttv_tvnorms[i].v4l2_id)
				break;
		if (i == BTTV_TVNORMS)
			return -EINVAL;

		down(&btv->lock);
		set_tvnorm(btv,i);
		i2c_vidiocschan(btv);
		up(&btv->lock);
		return 0;
	}
	case VIDIOC_QUERYSTD:
	{
		v4l2_std_id *id = arg;

		if (btread(BT848_DSTATUS) & BT848_DSTATUS_NUML)
			*id = V4L2_STD_625_50;
		else
			*id = V4L2_STD_525_60;
		return 0;
	}

	case VIDIOC_ENUMINPUT:
	{
		struct v4l2_input *i = arg;
		unsigned int n;

		n = i->index;
		if (n >= bttv_tvcards[btv->c.type].video_inputs)
			return -EINVAL;
		memset(i,0,sizeof(*i));
		i->index    = n;
		i->type     = V4L2_INPUT_TYPE_CAMERA;
		i->audioset = 1;
		if (i->index == bttv_tvcards[btv->c.type].tuner) {
			sprintf(i->name, "Television");
			i->type  = V4L2_INPUT_TYPE_TUNER;
			i->tuner = 0;
		} else if (i->index == btv->svhs) {
			sprintf(i->name, "S-Video");
		} else {
			sprintf(i->name,"Composite%d",i->index);
		}
		if (i->index == btv->input) {
			__u32 dstatus = btread(BT848_DSTATUS);
			if (0 == (dstatus & BT848_DSTATUS_PRES))
				i->status |= V4L2_IN_ST_NO_SIGNAL;
			if (0 == (dstatus & BT848_DSTATUS_HLOC))
				i->status |= V4L2_IN_ST_NO_H_LOCK;
		}
		for (n = 0; n < BTTV_TVNORMS; n++)
			i->std |= bttv_tvnorms[n].v4l2_id;
		return 0;
	}
	case VIDIOC_G_INPUT:
	{
		int *i = arg;
		*i = btv->input;
		return 0;
	}
	case VIDIOC_S_INPUT:
	{
		unsigned int *i = arg;

		if (*i > bttv_tvcards[btv->c.type].video_inputs)
			return -EINVAL;
		down(&btv->lock);
		set_input(btv,*i);
		up(&btv->lock);
		return 0;
	}

	case VIDIOC_G_TUNER:
	{
		struct v4l2_tuner *t = arg;

		if (UNSET == bttv_tvcards[btv->c.type].tuner)
			return -EINVAL;
		if (0 != t->index)
			return -EINVAL;
		down(&btv->lock);
		memset(t,0,sizeof(*t));
		strcpy(t->name, "Television");
		t->type       = V4L2_TUNER_ANALOG_TV;
		t->rangehigh  = 0xffffffffUL;
		t->capability = V4L2_TUNER_CAP_NORM;
		t->rxsubchans = V4L2_TUNER_SUB_MONO;
		if (btread(BT848_DSTATUS)&BT848_DSTATUS_HLOC)
			t->signal = 0xffff;
		{
			/* Hmmm ... */
			struct video_audio va;
			memset(&va, 0, sizeof(struct video_audio));
			bttv_call_i2c_clients(btv, VIDIOCGAUDIO, &va);
			if (btv->audio_hook)
				btv->audio_hook(btv,&va,0);
			if(va.mode & VIDEO_SOUND_STEREO) {
				t->audmode     = V4L2_TUNER_MODE_STEREO;
				t->rxsubchans |= V4L2_TUNER_SUB_STEREO;
			}
			if(va.mode & VIDEO_SOUND_LANG1) {
				t->audmode    = V4L2_TUNER_MODE_LANG1;
				t->rxsubchans = V4L2_TUNER_SUB_LANG1
					| V4L2_TUNER_SUB_LANG2;
			}
		}
		/* FIXME: fill capability+audmode */
		up(&btv->lock);
		return 0;
	}
	case VIDIOC_S_TUNER:
	{
		struct v4l2_tuner *t = arg;

		if (UNSET == bttv_tvcards[btv->c.type].tuner)
			return -EINVAL;
		if (0 != t->index)
			return -EINVAL;
		down(&btv->lock);
		{
			struct video_audio va;
			memset(&va, 0, sizeof(struct video_audio));
			bttv_call_i2c_clients(btv, VIDIOCGAUDIO, &va);
			if (t->audmode == V4L2_TUNER_MODE_MONO)
				va.mode = VIDEO_SOUND_MONO;
			else if (t->audmode == V4L2_TUNER_MODE_STEREO)
				va.mode = VIDEO_SOUND_STEREO;
			else if (t->audmode == V4L2_TUNER_MODE_LANG1)
				va.mode = VIDEO_SOUND_LANG1;
			else if (t->audmode == V4L2_TUNER_MODE_LANG2)
				va.mode = VIDEO_SOUND_LANG2;
			bttv_call_i2c_clients(btv, VIDIOCSAUDIO, &va);
			if (btv->audio_hook)
				btv->audio_hook(btv,&va,1);
		}
		up(&btv->lock);
		return 0;
	}

	case VIDIOC_G_FREQUENCY:
	{
		struct v4l2_frequency *f = arg;

		memset(f,0,sizeof(*f));
		f->type = V4L2_TUNER_ANALOG_TV;
		f->frequency = btv->freq;
		return 0;
	}
	case VIDIOC_S_FREQUENCY:
	{
		struct v4l2_frequency *f = arg;

		if (unlikely(f->tuner != 0))
			return -EINVAL;
		if (unlikely (f->type != V4L2_TUNER_ANALOG_TV))
			return -EINVAL;
		down(&btv->lock);
		btv->freq = f->frequency;
		bttv_call_i2c_clients(btv,VIDIOCSFREQ,&btv->freq);
		if (btv->has_matchbox && btv->radio_user)
			tea5757_set_freq(btv,btv->freq);
		up(&btv->lock);
		return 0;
	}
	case VIDIOC_LOG_STATUS:
	{
		bttv_call_i2c_clients(btv, VIDIOC_LOG_STATUS, NULL);
		return 0;
	}

	default:
		return -ENOIOCTLCMD;

	}
	return 0;
}

static int verify_window(const struct bttv_tvnorm *tvn,
			 struct v4l2_window *win, int fixup)
{
	enum v4l2_field field;
	int maxw, maxh;

	if (win->w.width  < 48 || win->w.height < 32)
		return -EINVAL;
	if (win->clipcount > 2048)
		return -EINVAL;

	field = win->field;
	maxw  = tvn->swidth;
	maxh  = tvn->sheight;

	if (V4L2_FIELD_ANY == field) {
		field = (win->w.height > maxh/2)
			? V4L2_FIELD_INTERLACED
			: V4L2_FIELD_TOP;
	}
	switch (field) {
	case V4L2_FIELD_TOP:
	case V4L2_FIELD_BOTTOM:
		maxh = maxh / 2;
		break;
	case V4L2_FIELD_INTERLACED:
		break;
	default:
		return -EINVAL;
	}

	if (!fixup && (win->w.width > maxw || win->w.height > maxh))
		return -EINVAL;

	if (win->w.width > maxw)
		win->w.width = maxw;
	if (win->w.height > maxh)
		win->w.height = maxh;
	win->field = field;
	return 0;
}

static int setup_window(struct bttv_fh *fh, struct bttv *btv,
			struct v4l2_window *win, int fixup)
{
	struct v4l2_clip *clips = NULL;
	int n,size,retval = 0;

	if (NULL == fh->ovfmt)
		return -EINVAL;
	if (!(fh->ovfmt->flags & FORMAT_FLAGS_PACKED))
		return -EINVAL;
	retval = verify_window(&bttv_tvnorms[btv->tvnorm],win,fixup);
	if (0 != retval)
		return retval;

	/* copy clips  --  luckily v4l1 + v4l2 are binary
	   compatible here ...*/
	n = win->clipcount;
	size = sizeof(*clips)*(n+4);
	clips = kmalloc(size,GFP_KERNEL);
	if (NULL == clips)
		return -ENOMEM;
	if (n > 0) {
		if (copy_from_user(clips,win->clips,sizeof(struct v4l2_clip)*n)) {
			kfree(clips);
			return -EFAULT;
		}
	}
	/* clip against screen */
	if (NULL != btv->fbuf.base)
		n = btcx_screen_clips(btv->fbuf.fmt.width, btv->fbuf.fmt.height,
				      &win->w, clips, n);
	btcx_sort_clips(clips,n);

	/* 4-byte alignments */
	switch (fh->ovfmt->depth) {
	case 8:
	case 24:
		btcx_align(&win->w, clips, n, 3);
		break;
	case 16:
		btcx_align(&win->w, clips, n, 1);
		break;
	case 32:
		/* no alignment fixups needed */
		break;
	default:
		BUG();
	}

	down(&fh->cap.lock);
	kfree(fh->ov.clips);
	fh->ov.clips    = clips;
	fh->ov.nclips   = n;

	fh->ov.w        = win->w;
	fh->ov.field    = win->field;
	fh->ov.setup_ok = 1;
	btv->init.ov.w.width   = win->w.width;
	btv->init.ov.w.height  = win->w.height;
	btv->init.ov.field     = win->field;

	/* update overlay if needed */
	retval = 0;
	if (check_btres(fh, RESOURCE_OVERLAY)) {
		struct bttv_buffer *new;

		new = videobuf_alloc(sizeof(*new));
		bttv_overlay_risc(btv, &fh->ov, fh->ovfmt, new);
		retval = bttv_switch_overlay(btv,fh,new);
	}
	up(&fh->cap.lock);
	return retval;
}

/* ----------------------------------------------------------------------- */

static struct videobuf_queue* bttv_queue(struct bttv_fh *fh)
{
	struct videobuf_queue* q = NULL;

	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		q = &fh->cap;
		break;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		q = &fh->vbi;
		break;
	default:
		BUG();
	}
	return q;
}

static int bttv_resource(struct bttv_fh *fh)
{
	int res = 0;

	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		res = RESOURCE_VIDEO;
		break;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		res = RESOURCE_VBI;
		break;
	default:
		BUG();
	}
	return res;
}

static int bttv_switch_type(struct bttv_fh *fh, enum v4l2_buf_type type)
{
	struct videobuf_queue *q = bttv_queue(fh);
	int res = bttv_resource(fh);

	if (check_btres(fh,res))
		return -EBUSY;
	if (videobuf_queue_is_busy(q))
		return -EBUSY;
	fh->type = type;
	return 0;
}

static void
pix_format_set_size     (struct v4l2_pix_format *       f,
			 const struct bttv_format *     fmt,
			 unsigned int                   width,
			 unsigned int                   height)
{
	f->width = width;
	f->height = height;

	if (fmt->flags & FORMAT_FLAGS_PLANAR) {
		f->bytesperline = width; /* Y plane */
		f->sizeimage = (width * height * fmt->depth) >> 3;
	} else {
		f->bytesperline = (width * fmt->depth) >> 3;
		f->sizeimage = height * f->bytesperline;
	}
}

static int bttv_g_fmt(struct bttv_fh *fh, struct v4l2_format *f)
{
	switch (f->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		memset(&f->fmt.pix,0,sizeof(struct v4l2_pix_format));
		pix_format_set_size (&f->fmt.pix, fh->fmt,
				     fh->width, fh->height);
		f->fmt.pix.field        = fh->cap.field;
		f->fmt.pix.pixelformat  = fh->fmt->fourcc;
		return 0;
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		memset(&f->fmt.win,0,sizeof(struct v4l2_window));
		f->fmt.win.w     = fh->ov.w;
		f->fmt.win.field = fh->ov.field;
		return 0;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		bttv_vbi_get_fmt(fh,f);
		return 0;
	default:
		return -EINVAL;
	}
}

static int bttv_try_fmt(struct bttv_fh *fh, struct bttv *btv,
			struct v4l2_format *f)
{
	switch (f->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
	{
		const struct bttv_format *fmt;
		enum v4l2_field field;
		unsigned int maxw,maxh;

		fmt = format_by_fourcc(f->fmt.pix.pixelformat);
		if (NULL == fmt)
			return -EINVAL;

		/* fixup format */
		maxw  = bttv_tvnorms[btv->tvnorm].swidth;
		maxh  = bttv_tvnorms[btv->tvnorm].sheight;
		field = f->fmt.pix.field;
		if (V4L2_FIELD_ANY == field)
			field = (f->fmt.pix.height > maxh/2)
				? V4L2_FIELD_INTERLACED
				: V4L2_FIELD_BOTTOM;
		if (V4L2_FIELD_SEQ_BT == field)
			field = V4L2_FIELD_SEQ_TB;
		switch (field) {
		case V4L2_FIELD_TOP:
		case V4L2_FIELD_BOTTOM:
		case V4L2_FIELD_ALTERNATE:
			maxh = maxh/2;
			break;
		case V4L2_FIELD_INTERLACED:
			break;
		case V4L2_FIELD_SEQ_TB:
			if (fmt->flags & FORMAT_FLAGS_PLANAR)
				return -EINVAL;
			break;
		default:
			return -EINVAL;
		}

		/* update data for the application */
		f->fmt.pix.field = field;
		if (f->fmt.pix.width  < 48)
			f->fmt.pix.width  = 48;
		if (f->fmt.pix.height < 32)
			f->fmt.pix.height = 32;
		if (f->fmt.pix.width  > maxw)
			f->fmt.pix.width = maxw;
		if (f->fmt.pix.height > maxh)
			f->fmt.pix.height = maxh;
		pix_format_set_size (&f->fmt.pix, fmt,
				     f->fmt.pix.width & ~3,
				     f->fmt.pix.height);

		return 0;
	}
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		return verify_window(&bttv_tvnorms[btv->tvnorm],
				     &f->fmt.win, 1);
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		bttv_vbi_try_fmt(fh,f);
		return 0;
	default:
		return -EINVAL;
	}
}

static int bttv_s_fmt(struct bttv_fh *fh, struct bttv *btv,
		      struct v4l2_format *f)
{
	int retval;

	switch (f->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
	{
		const struct bttv_format *fmt;

		retval = bttv_switch_type(fh,f->type);
		if (0 != retval)
			return retval;
		retval = bttv_try_fmt(fh,btv,f);
		if (0 != retval)
			return retval;
		fmt = format_by_fourcc(f->fmt.pix.pixelformat);

		/* update our state informations */
		down(&fh->cap.lock);
		fh->fmt              = fmt;
		fh->cap.field        = f->fmt.pix.field;
		fh->cap.last         = V4L2_FIELD_NONE;
		fh->width            = f->fmt.pix.width;
		fh->height           = f->fmt.pix.height;
		btv->init.fmt        = fmt;
		btv->init.width      = f->fmt.pix.width;
		btv->init.height     = f->fmt.pix.height;
		up(&fh->cap.lock);

		return 0;
	}
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
		if (no_overlay > 0) {
			printk ("V4L2_BUF_TYPE_VIDEO_OVERLAY: no_overlay\n");
			return -EINVAL;
		}
		return setup_window(fh, btv, &f->fmt.win, 1);
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		retval = bttv_switch_type(fh,f->type);
		if (0 != retval)
			return retval;
		if (locked_btres(fh->btv, RESOURCE_VBI))
			return -EBUSY;
		bttv_vbi_try_fmt(fh,f);
		bttv_vbi_setlines(fh,btv,f->fmt.vbi.count[0]);
		bttv_vbi_get_fmt(fh,f);
		return 0;
	default:
		return -EINVAL;
	}
}

static int bttv_do_ioctl(struct inode *inode, struct file *file,
			 unsigned int cmd, void *arg)
{
	struct bttv_fh *fh  = file->private_data;
	struct bttv    *btv = fh->btv;
	unsigned long flags;
	int retval = 0;

	if (bttv_debug > 1) {
		switch (_IOC_TYPE(cmd)) {
		case 'v':
			printk("bttv%d: ioctl 0x%x (v4l1, VIDIOC%s)\n",
			       btv->c.nr, cmd, (_IOC_NR(cmd) < V4L1_IOCTLS) ?
			       v4l1_ioctls[_IOC_NR(cmd)] : "???");
			break;
		case 'V':
			printk("bttv%d: ioctl 0x%x (v4l2, %s)\n",
			       btv->c.nr, cmd,  v4l2_ioctl_names[_IOC_NR(cmd)]);
			break;
		default:
			printk("bttv%d: ioctl 0x%x (???)\n",
			       btv->c.nr, cmd);
		}
	}
	if (btv->errors)
		bttv_reinit_bt848(btv);

	switch (cmd) {
	case VIDIOCSFREQ:
	case VIDIOCSTUNER:
	case VIDIOCSCHAN:
	case VIDIOC_S_CTRL:
	case VIDIOC_S_STD:
	case VIDIOC_S_INPUT:
	case VIDIOC_S_TUNER:
	case VIDIOC_S_FREQUENCY:
		retval = v4l2_prio_check(&btv->prio,&fh->prio);
		if (0 != retval)
			return retval;
	};

	switch (cmd) {

	/* ***  v4l1  *** ************************************************ */
	case VIDIOCGCAP:
	{
		struct video_capability *cap = arg;

		memset(cap,0,sizeof(*cap));
		strcpy(cap->name,btv->video_dev->name);
		if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
			/* vbi */
			cap->type = VID_TYPE_TUNER|VID_TYPE_TELETEXT;
		} else {
			/* others */
			cap->type = VID_TYPE_CAPTURE|
				VID_TYPE_TUNER|
				VID_TYPE_CLIPPING|
				VID_TYPE_SCALES;
			if (no_overlay <= 0)
				cap->type |= VID_TYPE_OVERLAY;

			cap->maxwidth  = bttv_tvnorms[btv->tvnorm].swidth;
			cap->maxheight = bttv_tvnorms[btv->tvnorm].sheight;
			cap->minwidth  = 48;
			cap->minheight = 32;
		}
		cap->channels  = bttv_tvcards[btv->c.type].video_inputs;
		cap->audios    = bttv_tvcards[btv->c.type].audio_inputs;
		return 0;
	}

	case VIDIOCGPICT:
	{
		struct video_picture *pic = arg;

		memset(pic,0,sizeof(*pic));
		pic->brightness = btv->bright;
		pic->contrast   = btv->contrast;
		pic->hue        = btv->hue;
		pic->colour     = btv->saturation;
		if (fh->fmt) {
			pic->depth   = fh->fmt->depth;
			pic->palette = fh->fmt->palette;
		}
		return 0;
	}
	case VIDIOCSPICT:
	{
		struct video_picture *pic = arg;
		const struct bttv_format *fmt;

		fmt = format_by_palette(pic->palette);
		if (NULL == fmt)
			return -EINVAL;
		down(&fh->cap.lock);
		if (fmt->depth != pic->depth) {
			retval = -EINVAL;
			goto fh_unlock_and_return;
		}
		if (fmt->flags & FORMAT_FLAGS_RAW) {
			/* VIDIOCMCAPTURE uses gbufsize, not RAW_BPL *
			   RAW_LINES * 2. F1 is stored at offset 0, F2
			   at buffer size / 2. */
			fh->width = RAW_BPL;
			fh->height = gbufsize / RAW_BPL;
			btv->init.width  = RAW_BPL;
			btv->init.height = gbufsize / RAW_BPL;
		}
		fh->ovfmt   = fmt;
		fh->fmt     = fmt;
		btv->init.ovfmt   = fmt;
		btv->init.fmt     = fmt;
		if (bigendian) {
			/* dirty hack time:  swap bytes for overlay if the
			   display adaptor is big endian (insmod option) */
			if (fmt->palette == VIDEO_PALETTE_RGB555 ||
			    fmt->palette == VIDEO_PALETTE_RGB565 ||
			    fmt->palette == VIDEO_PALETTE_RGB32) {
				fh->ovfmt = fmt+1;
			}
		}
		bt848_bright(btv,pic->brightness);
		bt848_contrast(btv,pic->contrast);
		bt848_hue(btv,pic->hue);
		bt848_sat(btv,pic->colour);
		up(&fh->cap.lock);
		return 0;
	}

	case VIDIOCGWIN:
	{
		struct video_window *win = arg;

		memset(win,0,sizeof(*win));
		win->x      = fh->ov.w.left;
		win->y      = fh->ov.w.top;
		win->width  = fh->ov.w.width;
		win->height = fh->ov.w.height;
		return 0;
	}
	case VIDIOCSWIN:
	{
		struct video_window *win = arg;
		struct v4l2_window w2;

		if (no_overlay > 0) {
			printk ("VIDIOCSWIN: no_overlay\n");
			return -EINVAL;
		}

		w2.field = V4L2_FIELD_ANY;
		w2.w.left    = win->x;
		w2.w.top     = win->y;
		w2.w.width   = win->width;
		w2.w.height  = win->height;
		w2.clipcount = win->clipcount;
		w2.clips     = (struct v4l2_clip __user *)win->clips;
		retval = setup_window(fh, btv, &w2, 0);
		if (0 == retval) {
			/* on v4l1 this ioctl affects the read() size too */
			fh->width  = fh->ov.w.width;
			fh->height = fh->ov.w.height;
			btv->init.width  = fh->ov.w.width;
			btv->init.height = fh->ov.w.height;
		}
		return retval;
	}

	case VIDIOCGFBUF:
	{
		struct video_buffer *fbuf = arg;

		fbuf->base          = btv->fbuf.base;
		fbuf->width         = btv->fbuf.fmt.width;
		fbuf->height        = btv->fbuf.fmt.height;
		fbuf->bytesperline  = btv->fbuf.fmt.bytesperline;
		if (fh->ovfmt)
			fbuf->depth = fh->ovfmt->depth;
		return 0;
	}
	case VIDIOCSFBUF:
	{
		struct video_buffer *fbuf = arg;
		const struct bttv_format *fmt;
		unsigned long end;

		if(!capable(CAP_SYS_ADMIN) &&
		   !capable(CAP_SYS_RAWIO))
			return -EPERM;
		end = (unsigned long)fbuf->base +
			fbuf->height * fbuf->bytesperline;
		down(&fh->cap.lock);
		retval = -EINVAL;

		switch (fbuf->depth) {
		case 8:
			fmt = format_by_palette(VIDEO_PALETTE_HI240);
			break;
		case 16:
			fmt = format_by_palette(VIDEO_PALETTE_RGB565);
			break;
		case 24:
			fmt = format_by_palette(VIDEO_PALETTE_RGB24);
			break;
		case 32:
			fmt = format_by_palette(VIDEO_PALETTE_RGB32);
			break;
		case 15:
			fbuf->depth = 16;
			fmt = format_by_palette(VIDEO_PALETTE_RGB555);
			break;
		default:
			fmt = NULL;
			break;
		}
		if (NULL == fmt)
			goto fh_unlock_and_return;

		fh->ovfmt = fmt;
		fh->fmt   = fmt;
		btv->init.ovfmt = fmt;
		btv->init.fmt   = fmt;
		btv->fbuf.base             = fbuf->base;
		btv->fbuf.fmt.width        = fbuf->width;
		btv->fbuf.fmt.height       = fbuf->height;
		if (fbuf->bytesperline)
			btv->fbuf.fmt.bytesperline = fbuf->bytesperline;
		else
			btv->fbuf.fmt.bytesperline = btv->fbuf.fmt.width*fbuf->depth/8;
		up(&fh->cap.lock);
		return 0;
	}

	case VIDIOCCAPTURE:
	case VIDIOC_OVERLAY:
	{
		struct bttv_buffer *new;
		int *on = arg;

		if (*on) {
			/* verify args */
			if (NULL == btv->fbuf.base)
				return -EINVAL;
			if (!fh->ov.setup_ok) {
				dprintk("bttv%d: overlay: !setup_ok\n",btv->c.nr);
				return -EINVAL;
			}
		}

		if (!check_alloc_btres(btv,fh,RESOURCE_OVERLAY))
			return -EBUSY;

		down(&fh->cap.lock);
		if (*on) {
			fh->ov.tvnorm = btv->tvnorm;
			new = videobuf_alloc(sizeof(*new));
			bttv_overlay_risc(btv, &fh->ov, fh->ovfmt, new);
		} else {
			new = NULL;
		}

		/* switch over */
		retval = bttv_switch_overlay(btv,fh,new);
		up(&fh->cap.lock);
		return retval;
	}

	case VIDIOCGMBUF:
	{
		struct video_mbuf *mbuf = arg;
		unsigned int i;

		down(&fh->cap.lock);
		retval = videobuf_mmap_setup(&fh->cap,gbuffers,gbufsize,
					     V4L2_MEMORY_MMAP);
		if (retval < 0)
			goto fh_unlock_and_return;
		memset(mbuf,0,sizeof(*mbuf));
		mbuf->frames = gbuffers;
		mbuf->size   = gbuffers * gbufsize;
		for (i = 0; i < gbuffers; i++)
			mbuf->offsets[i] = i * gbufsize;
		up(&fh->cap.lock);
		return 0;
	}
	case VIDIOCMCAPTURE:
	{
		struct video_mmap *vm = arg;
		struct bttv_buffer *buf;
		enum v4l2_field field;

		if (vm->frame >= VIDEO_MAX_FRAME)
			return -EINVAL;

		down(&fh->cap.lock);
		retval = -EINVAL;
		buf = (struct bttv_buffer *)fh->cap.bufs[vm->frame];
		if (NULL == buf)
			goto fh_unlock_and_return;
		if (0 == buf->vb.baddr)
			goto fh_unlock_and_return;
		if (buf->vb.state == STATE_QUEUED ||
		    buf->vb.state == STATE_ACTIVE)
			goto fh_unlock_and_return;

		field = (vm->height > bttv_tvnorms[btv->tvnorm].sheight/2)
			? V4L2_FIELD_INTERLACED
			: V4L2_FIELD_BOTTOM;
		retval = bttv_prepare_buffer(btv,buf,
					     format_by_palette(vm->format),
					     vm->width,vm->height,field);
		if (0 != retval)
			goto fh_unlock_and_return;
		spin_lock_irqsave(&btv->s_lock,flags);
		buffer_queue(&fh->cap,&buf->vb);
		spin_unlock_irqrestore(&btv->s_lock,flags);
		up(&fh->cap.lock);
		return 0;
	}
	case VIDIOCSYNC:
	{
		int *frame = arg;
		struct bttv_buffer *buf;

		if (*frame >= VIDEO_MAX_FRAME)
			return -EINVAL;

		down(&fh->cap.lock);
		retval = -EINVAL;
		buf = (struct bttv_buffer *)fh->cap.bufs[*frame];
		if (NULL == buf)
			goto fh_unlock_and_return;
		retval = videobuf_waiton(&buf->vb,0,1);
		if (0 != retval)
			goto fh_unlock_and_return;
		switch (buf->vb.state) {
		case STATE_ERROR:
			retval = -EIO;
			/* fall through */
		case STATE_DONE:
			videobuf_dma_pci_sync(btv->c.pci,&buf->vb.dma);
			bttv_dma_free(btv,buf);
			break;
		default:
			retval = -EINVAL;
			break;
		}
		up(&fh->cap.lock);
		return retval;
	}

	case VIDIOCGVBIFMT:
	{
		struct vbi_format *fmt = (void *) arg;
		struct v4l2_format fmt2;

		if (fh->type != V4L2_BUF_TYPE_VBI_CAPTURE) {
			retval = bttv_switch_type(fh,V4L2_BUF_TYPE_VBI_CAPTURE);
			if (0 != retval)
				return retval;
		}
		bttv_vbi_get_fmt(fh, &fmt2);

		memset(fmt,0,sizeof(*fmt));
		fmt->sampling_rate    = fmt2.fmt.vbi.sampling_rate;
		fmt->samples_per_line = fmt2.fmt.vbi.samples_per_line;
		fmt->sample_format    = VIDEO_PALETTE_RAW;
		fmt->start[0]         = fmt2.fmt.vbi.start[0];
		fmt->count[0]         = fmt2.fmt.vbi.count[0];
		fmt->start[1]         = fmt2.fmt.vbi.start[1];
		fmt->count[1]         = fmt2.fmt.vbi.count[1];
		if (fmt2.fmt.vbi.flags & VBI_UNSYNC)
			fmt->flags   |= V4L2_VBI_UNSYNC;
		if (fmt2.fmt.vbi.flags & VBI_INTERLACED)
			fmt->flags   |= V4L2_VBI_INTERLACED;
		return 0;
	}
	case VIDIOCSVBIFMT:
	{
		struct vbi_format *fmt = (void *) arg;
		struct v4l2_format fmt2;

		retval = bttv_switch_type(fh,V4L2_BUF_TYPE_VBI_CAPTURE);
		if (0 != retval)
			return retval;
		bttv_vbi_get_fmt(fh, &fmt2);

		if (fmt->sampling_rate    != fmt2.fmt.vbi.sampling_rate     ||
		    fmt->samples_per_line != fmt2.fmt.vbi.samples_per_line  ||
		    fmt->sample_format    != VIDEO_PALETTE_RAW              ||
		    fmt->start[0]         != fmt2.fmt.vbi.start[0]          ||
		    fmt->start[1]         != fmt2.fmt.vbi.start[1]          ||
		    fmt->count[0]         != fmt->count[1]                  ||
		    fmt->count[0]         <  1                              ||
		    fmt->count[0]         >  32 /* VBI_MAXLINES */)
			return -EINVAL;

		bttv_vbi_setlines(fh,btv,fmt->count[0]);
		return 0;
	}

	case BTTV_VERSION:
	case VIDIOCGFREQ:
	case VIDIOCSFREQ:
	case VIDIOCGTUNER:
	case VIDIOCSTUNER:
	case VIDIOCGCHAN:
	case VIDIOCSCHAN:
	case VIDIOCGAUDIO:
	case VIDIOCSAUDIO:
		return bttv_common_ioctls(btv,cmd,arg);

	/* ***  v4l2  *** ************************************************ */
	case VIDIOC_QUERYCAP:
	{
		struct v4l2_capability *cap = arg;

		if (0 == v4l2)
			return -EINVAL;
		strcpy(cap->driver,"bttv");
		strlcpy(cap->card,btv->video_dev->name,sizeof(cap->card));
		sprintf(cap->bus_info,"PCI:%s",pci_name(btv->c.pci));
		cap->version = BTTV_VERSION_CODE;
		cap->capabilities =
			V4L2_CAP_VIDEO_CAPTURE |
			V4L2_CAP_VBI_CAPTURE |
			V4L2_CAP_READWRITE |
			V4L2_CAP_STREAMING;
		if (no_overlay <= 0)
			cap->capabilities |= V4L2_CAP_VIDEO_OVERLAY;

		if (bttv_tvcards[btv->c.type].tuner != UNSET &&
		    bttv_tvcards[btv->c.type].tuner != TUNER_ABSENT)
			cap->capabilities |= V4L2_CAP_TUNER;
		return 0;
	}

	case VIDIOC_ENUM_FMT:
	{
		struct v4l2_fmtdesc *f = arg;
		enum v4l2_buf_type type;
		unsigned int i;
		int index;

		type  = f->type;
		if (V4L2_BUF_TYPE_VBI_CAPTURE == type) {
			/* vbi */
			index = f->index;
			if (0 != index)
				return -EINVAL;
			memset(f,0,sizeof(*f));
			f->index       = index;
			f->type        = type;
			f->pixelformat = V4L2_PIX_FMT_GREY;
			strcpy(f->description,"vbi data");
			return 0;
		}

		/* video capture + overlay */
		index = -1;
		for (i = 0; i < BTTV_FORMATS; i++) {
			if (bttv_formats[i].fourcc != -1)
				index++;
			if ((unsigned int)index == f->index)
				break;
		}
		if (BTTV_FORMATS == i)
			return -EINVAL;

		switch (f->type) {
		case V4L2_BUF_TYPE_VIDEO_CAPTURE:
			break;
		case V4L2_BUF_TYPE_VIDEO_OVERLAY:
			if (!(bttv_formats[i].flags & FORMAT_FLAGS_PACKED))
				return -EINVAL;
			break;
		default:
			return -EINVAL;
		}
		memset(f,0,sizeof(*f));
		f->index       = index;
		f->type        = type;
		f->pixelformat = bttv_formats[i].fourcc;
		strlcpy(f->description,bttv_formats[i].name,sizeof(f->description));
		return 0;
	}

	case VIDIOC_TRY_FMT:
	{
		struct v4l2_format *f = arg;
		return bttv_try_fmt(fh,btv,f);
	}
	case VIDIOC_G_FMT:
	{
		struct v4l2_format *f = arg;
		return bttv_g_fmt(fh,f);
	}
	case VIDIOC_S_FMT:
	{
		struct v4l2_format *f = arg;
		return bttv_s_fmt(fh,btv,f);
	}

	case VIDIOC_G_FBUF:
	{
		struct v4l2_framebuffer *fb = arg;

		*fb = btv->fbuf;
		fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING;
		if (fh->ovfmt)
			fb->fmt.pixelformat  = fh->ovfmt->fourcc;
		return 0;
	}
	case VIDIOC_S_FBUF:
	{
		struct v4l2_framebuffer *fb = arg;
		const struct bttv_format *fmt;

		if(!capable(CAP_SYS_ADMIN) &&
		   !capable(CAP_SYS_RAWIO))
			return -EPERM;

		/* check args */
		fmt = format_by_fourcc(fb->fmt.pixelformat);
		if (NULL == fmt)
			return -EINVAL;
		if (0 == (fmt->flags & FORMAT_FLAGS_PACKED))
			return -EINVAL;

		down(&fh->cap.lock);
		retval = -EINVAL;
		if (fb->flags & V4L2_FBUF_FLAG_OVERLAY) {
			if (fb->fmt.width > bttv_tvnorms[btv->tvnorm].swidth)
				goto fh_unlock_and_return;
			if (fb->fmt.height > bttv_tvnorms[btv->tvnorm].sheight)
				goto fh_unlock_and_return;
		}

		/* ok, accept it */
		btv->fbuf.base       = fb->base;
		btv->fbuf.fmt.width  = fb->fmt.width;
		btv->fbuf.fmt.height = fb->fmt.height;
		if (0 != fb->fmt.bytesperline)
			btv->fbuf.fmt.bytesperline = fb->fmt.bytesperline;
		else
			btv->fbuf.fmt.bytesperline = btv->fbuf.fmt.width*fmt->depth/8;

		retval = 0;
		fh->ovfmt = fmt;
		btv->init.ovfmt = fmt;
		if (fb->flags & V4L2_FBUF_FLAG_OVERLAY) {
			fh->ov.w.left   = 0;
			fh->ov.w.top    = 0;
			fh->ov.w.width  = fb->fmt.width;
			fh->ov.w.height = fb->fmt.height;
			btv->init.ov.w.width  = fb->fmt.width;
			btv->init.ov.w.height = fb->fmt.height;
			kfree(fh->ov.clips);
			fh->ov.clips = NULL;
			fh->ov.nclips = 0;

			if (check_btres(fh, RESOURCE_OVERLAY)) {
				struct bttv_buffer *new;

				new = videobuf_alloc(sizeof(*new));
				bttv_overlay_risc(btv,&fh->ov,fh->ovfmt,new);
				retval = bttv_switch_overlay(btv,fh,new);
			}
		}
		up(&fh->cap.lock);
		return retval;
	}

	case VIDIOC_REQBUFS:
		return videobuf_reqbufs(bttv_queue(fh),arg);

	case VIDIOC_QUERYBUF:
		return videobuf_querybuf(bttv_queue(fh),arg);

	case VIDIOC_QBUF:
		return videobuf_qbuf(bttv_queue(fh),arg);

	case VIDIOC_DQBUF:
		return videobuf_dqbuf(bttv_queue(fh),arg,
				      file->f_flags & O_NONBLOCK);

	case VIDIOC_STREAMON:
	{
		int res = bttv_resource(fh);

		if (!check_alloc_btres(btv,fh,res))
			return -EBUSY;
		return videobuf_streamon(bttv_queue(fh));
	}
	case VIDIOC_STREAMOFF:
	{
		int res = bttv_resource(fh);

		retval = videobuf_streamoff(bttv_queue(fh));
		if (retval < 0)
			return retval;
		free_btres(btv,fh,res);
		return 0;
	}

	case VIDIOC_QUERYCTRL:
	{
		struct v4l2_queryctrl *c = arg;
		int i;

		if ((c->id <  V4L2_CID_BASE ||
		     c->id >= V4L2_CID_LASTP1) &&
		    (c->id <  V4L2_CID_PRIVATE_BASE ||
		     c->id >= V4L2_CID_PRIVATE_LASTP1))
			return -EINVAL;
		for (i = 0; i < BTTV_CTLS; i++)
			if (bttv_ctls[i].id == c->id)
				break;
		if (i == BTTV_CTLS) {
			*c = no_ctl;
			return 0;
		}
		*c = bttv_ctls[i];
		if (i >= 4 && i <= 8) {
			struct video_audio va;
			memset(&va,0,sizeof(va));
			bttv_call_i2c_clients(btv, VIDIOCGAUDIO, &va);
			if (btv->audio_hook)
				btv->audio_hook(btv,&va,0);
			switch (bttv_ctls[i].id) {
			case V4L2_CID_AUDIO_VOLUME:
				if (!(va.flags & VIDEO_AUDIO_VOLUME))
					*c = no_ctl;
				break;
			case V4L2_CID_AUDIO_BALANCE:
				if (!(va.flags & VIDEO_AUDIO_BALANCE))
					*c = no_ctl;
				break;
			case V4L2_CID_AUDIO_BASS:
				if (!(va.flags & VIDEO_AUDIO_BASS))
					*c = no_ctl;
				break;
			case V4L2_CID_AUDIO_TREBLE:
				if (!(va.flags & VIDEO_AUDIO_TREBLE))
					*c = no_ctl;
				break;
			}
		}
		return 0;
	}
	case VIDIOC_G_CTRL:
		return get_control(btv,arg);
	case VIDIOC_S_CTRL:
		return set_control(btv,arg);
	case VIDIOC_G_PARM:
	{
		struct v4l2_streamparm *parm = arg;
		struct v4l2_standard s;
		if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
			return -EINVAL;
		memset(parm,0,sizeof(*parm));
		v4l2_video_std_construct(&s, bttv_tvnorms[btv->tvnorm].v4l2_id,
					 bttv_tvnorms[btv->tvnorm].name);
		parm->parm.capture.timeperframe = s.frameperiod;
		return 0;
	}

	case VIDIOC_G_PRIORITY:
	{
		enum v4l2_priority *p = arg;

		*p = v4l2_prio_max(&btv->prio);
		return 0;
	}
	case VIDIOC_S_PRIORITY:
	{
		enum v4l2_priority *prio = arg;

		return v4l2_prio_change(&btv->prio, &fh->prio, *prio);
	}

	case VIDIOC_ENUMSTD:
	case VIDIOC_G_STD:
	case VIDIOC_S_STD:
	case VIDIOC_ENUMINPUT:
	case VIDIOC_G_INPUT:
	case VIDIOC_S_INPUT:
	case VIDIOC_G_TUNER:
	case VIDIOC_S_TUNER:
	case VIDIOC_G_FREQUENCY:
	case VIDIOC_S_FREQUENCY:
	case VIDIOC_LOG_STATUS:
		return bttv_common_ioctls(btv,cmd,arg);

	default:
		return -ENOIOCTLCMD;
	}
	return 0;

 fh_unlock_and_return:
	up(&fh->cap.lock);
	return retval;
}

static int bttv_ioctl(struct inode *inode, struct file *file,
		      unsigned int cmd, unsigned long arg)
{
	struct bttv_fh *fh  = file->private_data;

	switch (cmd) {
	case BTTV_VBISIZE:
		bttv_switch_type(fh,V4L2_BUF_TYPE_VBI_CAPTURE);
		return fh->lines * 2 * 2048;
	default:
		return video_usercopy(inode, file, cmd, arg, bttv_do_ioctl);
	}
}

static ssize_t bttv_read(struct file *file, char __user *data,
			 size_t count, loff_t *ppos)
{
	struct bttv_fh *fh = file->private_data;
	int retval = 0;

	if (fh->btv->errors)
		bttv_reinit_bt848(fh->btv);
	dprintk("bttv%d: read count=%d type=%s\n",
		fh->btv->c.nr,(int)count,v4l2_type_names[fh->type]);

	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		if (locked_btres(fh->btv,RESOURCE_VIDEO))
			return -EBUSY;
		retval = videobuf_read_one(&fh->cap, data, count, ppos,
					   file->f_flags & O_NONBLOCK);
		break;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		if (!check_alloc_btres(fh->btv,fh,RESOURCE_VBI))
			return -EBUSY;
		retval = videobuf_read_stream(&fh->vbi, data, count, ppos, 1,
					      file->f_flags & O_NONBLOCK);
		break;
	default:
		BUG();
	}
	return retval;
}

static unsigned int bttv_poll(struct file *file, poll_table *wait)
{
	struct bttv_fh *fh = file->private_data;
	struct bttv_buffer *buf;
	enum v4l2_field field;

	if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
		if (!check_alloc_btres(fh->btv,fh,RESOURCE_VBI))
			return POLLERR;
		return videobuf_poll_stream(file, &fh->vbi, wait);
	}

	if (check_btres(fh,RESOURCE_VIDEO)) {
		/* streaming capture */
		if (list_empty(&fh->cap.stream))
			return POLLERR;
		buf = list_entry(fh->cap.stream.next,struct bttv_buffer,vb.stream);
	} else {
		/* read() capture */
		down(&fh->cap.lock);
		if (NULL == fh->cap.read_buf) {
			/* need to capture a new frame */
			if (locked_btres(fh->btv,RESOURCE_VIDEO)) {
				up(&fh->cap.lock);
				return POLLERR;
			}
			fh->cap.read_buf = videobuf_alloc(fh->cap.msize);
			if (NULL == fh->cap.read_buf) {
				up(&fh->cap.lock);
				return POLLERR;
			}
			fh->cap.read_buf->memory = V4L2_MEMORY_USERPTR;
			field = videobuf_next_field(&fh->cap);
			if (0 != fh->cap.ops->buf_prepare(&fh->cap,fh->cap.read_buf,field)) {
				kfree (fh->cap.read_buf);
				fh->cap.read_buf = NULL;
				up(&fh->cap.lock);
				return POLLERR;
			}
			fh->cap.ops->buf_queue(&fh->cap,fh->cap.read_buf);
			fh->cap.read_off = 0;
		}
		up(&fh->cap.lock);
		buf = (struct bttv_buffer*)fh->cap.read_buf;
	}

	poll_wait(file, &buf->vb.done, wait);
	if (buf->vb.state == STATE_DONE ||
	    buf->vb.state == STATE_ERROR)
		return POLLIN|POLLRDNORM;
	return 0;
}

static int bttv_open(struct inode *inode, struct file *file)
{
	int minor = iminor(inode);
	struct bttv *btv = NULL;
	struct bttv_fh *fh;
	enum v4l2_buf_type type = 0;
	unsigned int i;

	dprintk(KERN_DEBUG "bttv: open minor=%d\n",minor);

	for (i = 0; i < bttv_num; i++) {
		if (bttvs[i].video_dev &&
		    bttvs[i].video_dev->minor == minor) {
			btv = &bttvs[i];
			type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
			break;
		}
		if (bttvs[i].vbi_dev &&
		    bttvs[i].vbi_dev->minor == minor) {
			btv = &bttvs[i];
			type = V4L2_BUF_TYPE_VBI_CAPTURE;
			break;
		}
	}
	if (NULL == btv)
		return -ENODEV;

	dprintk(KERN_DEBUG "bttv%d: open called (type=%s)\n",
		btv->c.nr,v4l2_type_names[type]);

	/* allocate per filehandle data */
	fh = kmalloc(sizeof(*fh),GFP_KERNEL);
	if (NULL == fh)
		return -ENOMEM;
	file->private_data = fh;
	*fh = btv->init;
	fh->type = type;
	fh->ov.setup_ok = 0;
	v4l2_prio_open(&btv->prio,&fh->prio);

	videobuf_queue_init(&fh->cap, &bttv_video_qops,
			    btv->c.pci, &btv->s_lock,
			    V4L2_BUF_TYPE_VIDEO_CAPTURE,
			    V4L2_FIELD_INTERLACED,
			    sizeof(struct bttv_buffer),
			    fh);
	videobuf_queue_init(&fh->vbi, &bttv_vbi_qops,
			    btv->c.pci, &btv->s_lock,
			    V4L2_BUF_TYPE_VBI_CAPTURE,
			    V4L2_FIELD_SEQ_TB,
			    sizeof(struct bttv_buffer),
			    fh);
	i2c_vidiocschan(btv);

	btv->users++;
	if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type)
		bttv_vbi_setlines(fh,btv,16);
	bttv_field_count(btv);
	return 0;
}

static int bttv_release(struct inode *inode, struct file *file)
{
	struct bttv_fh *fh = file->private_data;
	struct bttv *btv = fh->btv;

	/* turn off overlay */
	if (check_btres(fh, RESOURCE_OVERLAY))
		bttv_switch_overlay(btv,fh,NULL);

	/* stop video capture */
	if (check_btres(fh, RESOURCE_VIDEO)) {
		videobuf_streamoff(&fh->cap);
		free_btres(btv,fh,RESOURCE_VIDEO);
	}
	if (fh->cap.read_buf) {
		buffer_release(&fh->cap,fh->cap.read_buf);
		kfree(fh->cap.read_buf);
	}

	/* stop vbi capture */
	if (check_btres(fh, RESOURCE_VBI)) {
		if (fh->vbi.streaming)
			videobuf_streamoff(&fh->vbi);
		if (fh->vbi.reading)
			videobuf_read_stop(&fh->vbi);
		free_btres(btv,fh,RESOURCE_VBI);
	}

	/* free stuff */
	videobuf_mmap_free(&fh->cap);
	videobuf_mmap_free(&fh->vbi);
	v4l2_prio_close(&btv->prio,&fh->prio);
	file->private_data = NULL;
	kfree(fh);

	btv->users--;
	bttv_field_count(btv);
	return 0;
}

static int
bttv_mmap(struct file *file, struct vm_area_struct *vma)
{
	struct bttv_fh *fh = file->private_data;

	dprintk("bttv%d: mmap type=%s 0x%lx+%ld\n",
		fh->btv->c.nr, v4l2_type_names[fh->type],
		vma->vm_start, vma->vm_end - vma->vm_start);
	return videobuf_mmap_mapper(bttv_queue(fh),vma);
}

static struct file_operations bttv_fops =
{
	.owner	  = THIS_MODULE,
	.open	  = bttv_open,
	.release  = bttv_release,
	.ioctl	  = bttv_ioctl,
	.llseek	  = no_llseek,
	.read	  = bttv_read,
	.mmap	  = bttv_mmap,
	.poll     = bttv_poll,
};

static struct video_device bttv_video_template =
{
	.name     = "UNSET",
	.type     = VID_TYPE_CAPTURE|VID_TYPE_TUNER|
		    VID_TYPE_CLIPPING|VID_TYPE_SCALES,
	.hardware = VID_HARDWARE_BT848,
	.fops     = &bttv_fops,
	.minor    = -1,
};

static struct video_device bttv_vbi_template =
{
	.name     = "bt848/878 vbi",
	.type     = VID_TYPE_TUNER|VID_TYPE_TELETEXT,
	.hardware = VID_HARDWARE_BT848,
	.fops     = &bttv_fops,
	.minor    = -1,
};

/* ----------------------------------------------------------------------- */
/* radio interface                                                         */

static int radio_open(struct inode *inode, struct file *file)
{
	int minor = iminor(inode);
	struct bttv *btv = NULL;
	unsigned int i;

	dprintk("bttv: open minor=%d\n",minor);

	for (i = 0; i < bttv_num; i++) {
		if (bttvs[i].radio_dev->minor == minor) {
			btv = &bttvs[i];
			break;
		}
	}
	if (NULL == btv)
		return -ENODEV;

	dprintk("bttv%d: open called (radio)\n",btv->c.nr);
	down(&btv->lock);

	btv->radio_user++;

	file->private_data = btv;

	bttv_call_i2c_clients(btv,AUDC_SET_RADIO,&btv->tuner_type);
	audio_mux(btv,AUDIO_RADIO);

	up(&btv->lock);
	return 0;
}

static int radio_release(struct inode *inode, struct file *file)
{
	struct bttv        *btv = file->private_data;
	struct rds_command cmd;

	btv->radio_user--;

	bttv_call_i2c_clients(btv, RDS_CMD_CLOSE, &cmd);

	return 0;
}

static int radio_do_ioctl(struct inode *inode, struct file *file,
			  unsigned int cmd, void *arg)
{
	struct bttv    *btv = file->private_data;

	switch (cmd) {
	case VIDIOCGCAP:
	{
		struct video_capability *cap = arg;

		memset(cap,0,sizeof(*cap));
		strcpy(cap->name,btv->radio_dev->name);
		cap->type = VID_TYPE_TUNER;
		cap->channels = 1;
		cap->audios = 1;
		return 0;
	}

	case VIDIOCGTUNER:
	{
		struct video_tuner *v = arg;

		if(v->tuner)
			return -EINVAL;
		memset(v,0,sizeof(*v));
		strcpy(v->name, "Radio");
		bttv_call_i2c_clients(btv,cmd,v);
		return 0;
	}
	case VIDIOCSTUNER:
		/* nothing to do */
		return 0;

	case BTTV_VERSION:
	case VIDIOCGFREQ:
	case VIDIOCSFREQ:
	case VIDIOCGAUDIO:
	case VIDIOCSAUDIO:
		return bttv_common_ioctls(btv,cmd,arg);

	default:
		return -ENOIOCTLCMD;
	}
	return 0;
}

static int radio_ioctl(struct inode *inode, struct file *file,
		       unsigned int cmd, unsigned long arg)
{
	return video_usercopy(inode, file, cmd, arg, radio_do_ioctl);
}

static ssize_t radio_read(struct file *file, char __user *data,
			 size_t count, loff_t *ppos)
{
	struct bttv    *btv = file->private_data;
	struct rds_command cmd;
	cmd.block_count = count/3;
	cmd.buffer = data;
	cmd.instance = file;
	cmd.result = -ENODEV;

	bttv_call_i2c_clients(btv, RDS_CMD_READ, &cmd);

	return cmd.result;
}

static unsigned int radio_poll(struct file *file, poll_table *wait)
{
	struct bttv    *btv = file->private_data;
	struct rds_command cmd;
	cmd.instance = file;
	cmd.event_list = wait;
	cmd.result = -ENODEV;
	bttv_call_i2c_clients(btv, RDS_CMD_POLL, &cmd);

	return cmd.result;
}

static struct file_operations radio_fops =
{
	.owner	  = THIS_MODULE,
	.open	  = radio_open,
	.read     = radio_read,
	.release  = radio_release,
	.ioctl	  = radio_ioctl,
	.llseek	  = no_llseek,
	.poll     = radio_poll,
};

static struct video_device radio_template =
{
	.name     = "bt848/878 radio",
	.type     = VID_TYPE_TUNER,
	.hardware = VID_HARDWARE_BT848,
	.fops     = &radio_fops,
	.minor    = -1,
};

/* ----------------------------------------------------------------------- */
/* some debug code                                                         */

static int bttv_risc_decode(u32 risc)
{
	static char *instr[16] = {
		[ BT848_RISC_WRITE     >> 28 ] = "write",
		[ BT848_RISC_SKIP      >> 28 ] = "skip",
		[ BT848_RISC_WRITEC    >> 28 ] = "writec",
		[ BT848_RISC_JUMP      >> 28 ] = "jump",
		[ BT848_RISC_SYNC      >> 28 ] = "sync",
		[ BT848_RISC_WRITE123  >> 28 ] = "write123",
		[ BT848_RISC_SKIP123   >> 28 ] = "skip123",
		[ BT848_RISC_WRITE1S23 >> 28 ] = "write1s23",
	};
	static int incr[16] = {
		[ BT848_RISC_WRITE     >> 28 ] = 2,
		[ BT848_RISC_JUMP      >> 28 ] = 2,
		[ BT848_RISC_SYNC      >> 28 ] = 2,
		[ BT848_RISC_WRITE123  >> 28 ] = 5,
		[ BT848_RISC_SKIP123   >> 28 ] = 2,
		[ BT848_RISC_WRITE1S23 >> 28 ] = 3,
	};
	static char *bits[] = {
		"be0",  "be1",  "be2",  "be3/resync",
		"set0", "set1", "set2", "set3",
		"clr0", "clr1", "clr2", "clr3",
		"irq",  "res",  "eol",  "sol",
	};
	int i;

	printk("0x%08x [ %s", risc,
	       instr[risc >> 28] ? instr[risc >> 28] : "INVALID");
	for (i = ARRAY_SIZE(bits)-1; i >= 0; i--)
		if (risc & (1 << (i + 12)))
			printk(" %s",bits[i]);
	printk(" count=%d ]\n", risc & 0xfff);
	return incr[risc >> 28] ? incr[risc >> 28] : 1;
}

static void bttv_risc_disasm(struct bttv *btv,
			     struct btcx_riscmem *risc)
{
	unsigned int i,j,n;

	printk("%s: risc disasm: %p [dma=0x%08lx]\n",
	       btv->c.name, risc->cpu, (unsigned long)risc->dma);
	for (i = 0; i < (risc->size >> 2); i += n) {
		printk("%s:   0x%lx: ", btv->c.name,
		       (unsigned long)(risc->dma + (i<<2)));
		n = bttv_risc_decode(risc->cpu[i]);
		for (j = 1; j < n; j++)
			printk("%s:   0x%lx: 0x%08x [ arg #%d ]\n",
			       btv->c.name, (unsigned long)(risc->dma + ((i+j)<<2)),
			       risc->cpu[i+j], j);
		if (0 == risc->cpu[i])
			break;
	}
}

static void bttv_print_riscaddr(struct bttv *btv)
{
	printk("  main: %08Lx\n",
	       (unsigned long long)btv->main.dma);
	printk("  vbi : o=%08Lx e=%08Lx\n",
	       btv->cvbi ? (unsigned long long)btv->cvbi->top.dma : 0,
	       btv->cvbi ? (unsigned long long)btv->cvbi->bottom.dma : 0);
	printk("  cap : o=%08Lx e=%08Lx\n",
	       btv->curr.top    ? (unsigned long long)btv->curr.top->top.dma : 0,
	       btv->curr.bottom ? (unsigned long long)btv->curr.bottom->bottom.dma : 0);
	printk("  scr : o=%08Lx e=%08Lx\n",
	       btv->screen ? (unsigned long long)btv->screen->top.dma : 0,
	       btv->screen ? (unsigned long long)btv->screen->bottom.dma : 0);
	bttv_risc_disasm(btv, &btv->main);
}

/* ----------------------------------------------------------------------- */
/* irq handler                                                             */

static char *irq_name[] = {
	"FMTCHG",  // format change detected (525 vs. 625)
	"VSYNC",   // vertical sync (new field)
	"HSYNC",   // horizontal sync
	"OFLOW",   // chroma/luma AGC overflow
	"HLOCK",   // horizontal lock changed
	"VPRES",   // video presence changed
	"6", "7",
	"I2CDONE", // hw irc operation finished
	"GPINT",   // gpio port triggered irq
	"10",
	"RISCI",   // risc instruction triggered irq
	"FBUS",    // pixel data fifo dropped data (high pci bus latencies)
	"FTRGT",   // pixel data fifo overrun
	"FDSR",    // fifo data stream resyncronisation
	"PPERR",   // parity error (data transfer)
	"RIPERR",  // parity error (read risc instructions)
	"PABORT",  // pci abort
	"OCERR",   // risc instruction error
	"SCERR",   // syncronisation error
};

static void bttv_print_irqbits(u32 print, u32 mark)
{
	unsigned int i;

	printk("bits:");
	for (i = 0; i < ARRAY_SIZE(irq_name); i++) {
		if (print & (1 << i))
			printk(" %s",irq_name[i]);
		if (mark & (1 << i))
			printk("*");
	}
}

static void bttv_irq_debug_low_latency(struct bttv *btv, u32 rc)
{
	printk("bttv%d: irq: skipped frame [main=%lx,o_vbi=%lx,o_field=%lx,rc=%lx]\n",
	       btv->c.nr,
	       (unsigned long)btv->main.dma,
	       (unsigned long)btv->main.cpu[RISC_SLOT_O_VBI+1],
	       (unsigned long)btv->main.cpu[RISC_SLOT_O_FIELD+1],
	       (unsigned long)rc);

	if (0 == (btread(BT848_DSTATUS) & BT848_DSTATUS_HLOC)) {
		printk("bttv%d: Oh, there (temporarely?) is no input signal. "
		       "Ok, then this is harmless, don't worry ;)\n",
		       btv->c.nr);
		return;
	}
	printk("bttv%d: Uhm. Looks like we have unusual high IRQ latencies.\n",
	       btv->c.nr);
	printk("bttv%d: Lets try to catch the culpit red-handed ...\n",
	       btv->c.nr);
	dump_stack();
}

static int
bttv_irq_next_video(struct bttv *btv, struct bttv_buffer_set *set)
{
	struct bttv_buffer *item;

	memset(set,0,sizeof(*set));

	/* capture request ? */
	if (!list_empty(&btv->capture)) {
		set->frame_irq = 1;
		item = list_entry(btv->capture.next, struct bttv_buffer, vb.queue);
		if (V4L2_FIELD_HAS_TOP(item->vb.field))
			set->top    = item;
		if (V4L2_FIELD_HAS_BOTTOM(item->vb.field))
			set->bottom = item;

		/* capture request for other field ? */
		if (!V4L2_FIELD_HAS_BOTH(item->vb.field) &&
		    (item->vb.queue.next != &btv->capture)) {
			item = list_entry(item->vb.queue.next, struct bttv_buffer, vb.queue);
			if (!V4L2_FIELD_HAS_BOTH(item->vb.field)) {
				if (NULL == set->top &&
				    V4L2_FIELD_TOP == item->vb.field) {
					set->top = item;
				}
				if (NULL == set->bottom &&
				    V4L2_FIELD_BOTTOM == item->vb.field) {
					set->bottom = item;
				}
				if (NULL != set->top  &&  NULL != set->bottom)
					set->top_irq = 2;
			}
		}
	}

	/* screen overlay ? */
	if (NULL != btv->screen) {
		if (V4L2_FIELD_HAS_BOTH(btv->screen->vb.field)) {
			if (NULL == set->top && NULL == set->bottom) {
				set->top    = btv->screen;
				set->bottom = btv->screen;
			}
		} else {
			if (V4L2_FIELD_TOP == btv->screen->vb.field &&
			    NULL == set->top) {
				set->top = btv->screen;
			}
			if (V4L2_FIELD_BOTTOM == btv->screen->vb.field &&
			    NULL == set->bottom) {
				set->bottom = btv->screen;
			}
		}
	}

	dprintk("bttv%d: next set: top=%p bottom=%p [screen=%p,irq=%d,%d]\n",
		btv->c.nr,set->top, set->bottom,
		btv->screen,set->frame_irq,set->top_irq);
	return 0;
}

static void
bttv_irq_wakeup_video(struct bttv *btv, struct bttv_buffer_set *wakeup,
		      struct bttv_buffer_set *curr, unsigned int state)
{
	struct timeval ts;

	do_gettimeofday(&ts);

	if (wakeup->top == wakeup->bottom) {
		if (NULL != wakeup->top && curr->top != wakeup->top) {
			if (irq_debug > 1)
				printk("bttv%d: wakeup: both=%p\n",btv->c.nr,wakeup->top);
			wakeup->top->vb.ts = ts;
			wakeup->top->vb.field_count = btv->field_count;
			wakeup->top->vb.state = state;
			wake_up(&wakeup->top->vb.done);
		}
	} else {
		if (NULL != wakeup->top && curr->top != wakeup->top) {
			if (irq_debug > 1)
				printk("bttv%d: wakeup: top=%p\n",btv->c.nr,wakeup->top);
			wakeup->top->vb.ts = ts;
			wakeup->top->vb.field_count = btv->field_count;
			wakeup->top->vb.state = state;
			wake_up(&wakeup->top->vb.done);
		}
		if (NULL != wakeup->bottom && curr->bottom != wakeup->bottom) {
			if (irq_debug > 1)
				printk("bttv%d: wakeup: bottom=%p\n",btv->c.nr,wakeup->bottom);
			wakeup->bottom->vb.ts = ts;
			wakeup->bottom->vb.field_count = btv->field_count;
			wakeup->bottom->vb.state = state;
			wake_up(&wakeup->bottom->vb.done);
		}
	}
}

static void
bttv_irq_wakeup_vbi(struct bttv *btv, struct bttv_buffer *wakeup,
		    unsigned int state)
{
	struct timeval ts;

	if (NULL == wakeup)
		return;

	do_gettimeofday(&ts);
	wakeup->vb.ts = ts;
	wakeup->vb.field_count = btv->field_count;
	wakeup->vb.state = state;
	wake_up(&wakeup->vb.done);
}

static void bttv_irq_timeout(unsigned long data)
{
	struct bttv *btv = (struct bttv *)data;
	struct bttv_buffer_set old,new;
	struct bttv_buffer *ovbi;
	struct bttv_buffer *item;
	unsigned long flags;

	if (bttv_verbose) {
		printk(KERN_INFO "bttv%d: timeout: drop=%d irq=%d/%d, risc=%08x, ",
		       btv->c.nr, btv->framedrop, btv->irq_me, btv->irq_total,
		       btread(BT848_RISC_COUNT));
		bttv_print_irqbits(btread(BT848_INT_STAT),0);
		printk("\n");
	}

	spin_lock_irqsave(&btv->s_lock,flags);

	/* deactivate stuff */
	memset(&new,0,sizeof(new));
	old  = btv->curr;
	ovbi = btv->cvbi;
	btv->curr = new;
	btv->cvbi = NULL;
	btv->loop_irq = 0;
	bttv_buffer_activate_video(btv, &new);
	bttv_buffer_activate_vbi(btv,   NULL);
	bttv_set_dma(btv, 0);

	/* wake up */
	bttv_irq_wakeup_video(btv, &old, &new, STATE_ERROR);
	bttv_irq_wakeup_vbi(btv, ovbi, STATE_ERROR);

	/* cancel all outstanding capture / vbi requests */
	while (!list_empty(&btv->capture)) {
		item = list_entry(btv->capture.next, struct bttv_buffer, vb.queue);
		list_del(&item->vb.queue);
		item->vb.state = STATE_ERROR;
		wake_up(&item->vb.done);
	}
	while (!list_empty(&btv->vcapture)) {
		item = list_entry(btv->vcapture.next, struct bttv_buffer, vb.queue);
		list_del(&item->vb.queue);
		item->vb.state = STATE_ERROR;
		wake_up(&item->vb.done);
	}

	btv->errors++;
	spin_unlock_irqrestore(&btv->s_lock,flags);
}

static void
bttv_irq_wakeup_top(struct bttv *btv)
{
	struct bttv_buffer *wakeup = btv->curr.top;

	if (NULL == wakeup)
		return;

	spin_lock(&btv->s_lock);
	btv->curr.top_irq = 0;
	btv->curr.top = NULL;
	bttv_risc_hook(btv, RISC_SLOT_O_FIELD, NULL, 0);

	do_gettimeofday(&wakeup->vb.ts);
	wakeup->vb.field_count = btv->field_count;
	wakeup->vb.state = STATE_DONE;
	wake_up(&wakeup->vb.done);
	spin_unlock(&btv->s_lock);
}

static inline int is_active(struct btcx_riscmem *risc, u32 rc)
{
	if (rc < risc->dma)
		return 0;
	if (rc > risc->dma + risc->size)
		return 0;
	return 1;
}

static void
bttv_irq_switch_video(struct bttv *btv)
{
	struct bttv_buffer_set new;
	struct bttv_buffer_set old;
	dma_addr_t rc;

	spin_lock(&btv->s_lock);

	/* new buffer set */
	bttv_irq_next_video(btv, &new);
	rc = btread(BT848_RISC_COUNT);
	if ((btv->curr.top    && is_active(&btv->curr.top->top,       rc)) ||
	    (btv->curr.bottom && is_active(&btv->curr.bottom->bottom, rc))) {
		btv->framedrop++;
		if (debug_latency)
			bttv_irq_debug_low_latency(btv, rc);
		spin_unlock(&btv->s_lock);
		return;
	}

	/* switch over */
	old = btv->curr;
	btv->curr = new;
	btv->loop_irq &= ~1;
	bttv_buffer_activate_video(btv, &new);
	bttv_set_dma(btv, 0);

	/* switch input */
	if (UNSET != btv->new_input) {
		video_mux(btv,btv->new_input);
		btv->new_input = UNSET;
	}

	/* wake up finished buffers */
	bttv_irq_wakeup_video(btv, &old, &new, STATE_DONE);
	spin_unlock(&btv->s_lock);
}

static void
bttv_irq_switch_vbi(struct bttv *btv)
{
	struct bttv_buffer *new = NULL;
	struct bttv_buffer *old;
	u32 rc;

	spin_lock(&btv->s_lock);

	if (!list_empty(&btv->vcapture))
		new = list_entry(btv->vcapture.next, struct bttv_buffer, vb.queue);
	old = btv->cvbi;

	rc = btread(BT848_RISC_COUNT);
	if (NULL != old && (is_active(&old->top,    rc) ||
			    is_active(&old->bottom, rc))) {
		btv->framedrop++;
		if (debug_latency)
			bttv_irq_debug_low_latency(btv, rc);
		spin_unlock(&btv->s_lock);
		return;
	}

	/* switch */
	btv->cvbi = new;
	btv->loop_irq &= ~4;
	bttv_buffer_activate_vbi(btv, new);
	bttv_set_dma(btv, 0);

	bttv_irq_wakeup_vbi(btv, old, STATE_DONE);
	spin_unlock(&btv->s_lock);
}

static irqreturn_t bttv_irq(int irq, void *dev_id, struct pt_regs * regs)
{
	u32 stat,astat;
	u32 dstat;
	int count;
	struct bttv *btv;
	int handled = 0;

	btv=(struct bttv *)dev_id;

	if (btv->any_irq)
		handled = bttv_any_irq(&btv->c);

	count=0;
	while (1) {
		/* get/clear interrupt status bits */
		stat=btread(BT848_INT_STAT);
		astat=stat&btread(BT848_INT_MASK);
		if (!astat)
			break;
		handled = 1;
		btwrite(stat,BT848_INT_STAT);

		/* get device status bits */
		dstat=btread(BT848_DSTATUS);

		if (irq_debug) {
			printk(KERN_DEBUG "bttv%d: irq loop=%d fc=%d "
			       "riscs=%x, riscc=%08x, ",
			       btv->c.nr, count, btv->field_count,
			       stat>>28, btread(BT848_RISC_COUNT));
			bttv_print_irqbits(stat,astat);
			if (stat & BT848_INT_HLOCK)
				printk("   HLOC => %s", (dstat & BT848_DSTATUS_HLOC)
				       ? "yes" : "no");
			if (stat & BT848_INT_VPRES)
				printk("   PRES => %s", (dstat & BT848_DSTATUS_PRES)
				       ? "yes" : "no");
			if (stat & BT848_INT_FMTCHG)
				printk("   NUML => %s", (dstat & BT848_DSTATUS_NUML)
				       ? "625" : "525");
			printk("\n");
		}

		if (astat&BT848_INT_VSYNC)
			btv->field_count++;

		if (astat & BT848_INT_GPINT) {
			wake_up(&btv->gpioq);
			bttv_gpio_irq(&btv->c);
		}

		if (astat & BT848_INT_I2CDONE) {
			btv->i2c_done = stat;
			wake_up(&btv->i2c_queue);
		}

		if ((astat & BT848_INT_RISCI)  &&  (stat & (4<<28)))
			bttv_irq_switch_vbi(btv);

		if ((astat & BT848_INT_RISCI)  &&  (stat & (2<<28)))
			bttv_irq_wakeup_top(btv);

		if ((astat & BT848_INT_RISCI)  &&  (stat & (1<<28)))
			bttv_irq_switch_video(btv);

		if ((astat & BT848_INT_HLOCK)  &&  btv->opt_automute)
			audio_mux(btv, -1);

		if (astat & (BT848_INT_SCERR|BT848_INT_OCERR)) {
			printk(KERN_INFO "bttv%d: %s%s @ %08x,",btv->c.nr,
			       (astat & BT848_INT_SCERR) ? "SCERR" : "",
			       (astat & BT848_INT_OCERR) ? "OCERR" : "",
			       btread(BT848_RISC_COUNT));
			bttv_print_irqbits(stat,astat);
			printk("\n");
			if (bttv_debug)
				bttv_print_riscaddr(btv);
		}
		if (fdsr && astat & BT848_INT_FDSR) {
			printk(KERN_INFO "bttv%d: FDSR @ %08x\n",
			       btv->c.nr,btread(BT848_RISC_COUNT));
			if (bttv_debug)
				bttv_print_riscaddr(btv);
		}

		count++;
		if (count > 4) {

			if (count > 8 || !(astat & BT848_INT_GPINT)) {
				btwrite(0, BT848_INT_MASK);

				printk(KERN_ERR
					   "bttv%d: IRQ lockup, cleared int mask [", btv->c.nr);
			} else {
				printk(KERN_ERR
					   "bttv%d: IRQ lockup, clearing GPINT from int mask [", btv->c.nr);

				btwrite(btread(BT848_INT_MASK) & (-1 ^ BT848_INT_GPINT),
						BT848_INT_MASK);
			};

			bttv_print_irqbits(stat,astat);

			printk("]\n");
		}
	}
	btv->irq_total++;
	if (handled)
		btv->irq_me++;
	return IRQ_RETVAL(handled);
}


/* ----------------------------------------------------------------------- */
/* initialitation                                                          */

static struct video_device *vdev_init(struct bttv *btv,
				      struct video_device *template,
				      char *type)
{
	struct video_device *vfd;

	vfd = video_device_alloc();
	if (NULL == vfd)
		return NULL;
	*vfd = *template;
	vfd->minor   = -1;
	vfd->dev     = &btv->c.pci->dev;
	vfd->release = video_device_release;
	snprintf(vfd->name, sizeof(vfd->name), "BT%d%s %s (%s)",
		 btv->id, (btv->id==848 && btv->revision==0x12) ? "A" : "",
		 type, bttv_tvcards[btv->c.type].name);
	return vfd;
}

static void bttv_unregister_video(struct bttv *btv)
{
	if (btv->video_dev) {
		if (-1 != btv->video_dev->minor)
			video_unregister_device(btv->video_dev);
		else
			video_device_release(btv->video_dev);
		btv->video_dev = NULL;
	}
	if (btv->vbi_dev) {
		if (-1 != btv->vbi_dev->minor)
			video_unregister_device(btv->vbi_dev);
		else
			video_device_release(btv->vbi_dev);
		btv->vbi_dev = NULL;
	}
	if (btv->radio_dev) {
		if (-1 != btv->radio_dev->minor)
			video_unregister_device(btv->radio_dev);
		else
			video_device_release(btv->radio_dev);
		btv->radio_dev = NULL;
	}
}

/* register video4linux devices */
static int __devinit bttv_register_video(struct bttv *btv)
{
	if (no_overlay <= 0) {
		bttv_video_template.type |= VID_TYPE_OVERLAY;
	} else {
		printk("bttv: Overlay support disabled.\n");
	}

	/* video */
	btv->video_dev = vdev_init(btv, &bttv_video_template, "video");
	if (NULL == btv->video_dev)
		goto err;
	if (video_register_device(btv->video_dev,VFL_TYPE_GRABBER,video_nr)<0)
		goto err;
	printk(KERN_INFO "bttv%d: registered device video%d\n",
	       btv->c.nr,btv->video_dev->minor & 0x1f);
	video_device_create_file(btv->video_dev, &class_device_attr_card);

	/* vbi */
	btv->vbi_dev = vdev_init(btv, &bttv_vbi_template, "vbi");
	if (NULL == btv->vbi_dev)
		goto err;
	if (video_register_device(btv->vbi_dev,VFL_TYPE_VBI,vbi_nr)<0)
		goto err;
	printk(KERN_INFO "bttv%d: registered device vbi%d\n",
	       btv->c.nr,btv->vbi_dev->minor & 0x1f);

	if (!btv->has_radio)
		return 0;
	/* radio */
	btv->radio_dev = vdev_init(btv, &radio_template, "radio");
	if (NULL == btv->radio_dev)
		goto err;
	if (video_register_device(btv->radio_dev, VFL_TYPE_RADIO,radio_nr)<0)
		goto err;
	printk(KERN_INFO "bttv%d: registered device radio%d\n",
	       btv->c.nr,btv->radio_dev->minor & 0x1f);

	/* all done */
	return 0;

 err:
	bttv_unregister_video(btv);
	return -1;
}


/* on OpenFirmware machines (PowerMac at least), PCI memory cycle */
/* response on cards with no firmware is not enabled by OF */
static void pci_set_command(struct pci_dev *dev)
{
#if defined(__powerpc__)
	unsigned int cmd;

	pci_read_config_dword(dev, PCI_COMMAND, &cmd);
	cmd = (cmd | PCI_COMMAND_MEMORY );
	pci_write_config_dword(dev, PCI_COMMAND, cmd);
#endif
}

static int __devinit bttv_probe(struct pci_dev *dev,
				const struct pci_device_id *pci_id)
{
	int result;
	unsigned char lat;
	struct bttv *btv;

	if (bttv_num == BTTV_MAX)
		return -ENOMEM;
	printk(KERN_INFO "bttv: Bt8xx card found (%d).\n", bttv_num);
	btv=&bttvs[bttv_num];
	memset(btv,0,sizeof(*btv));
	btv->c.nr  = bttv_num;
	sprintf(btv->c.name,"bttv%d",btv->c.nr);

	/* initialize structs / fill in defaults */
	init_MUTEX(&btv->lock);
	init_MUTEX(&btv->reslock);
	spin_lock_init(&btv->s_lock);
	spin_lock_init(&btv->gpio_lock);
	init_waitqueue_head(&btv->gpioq);
	init_waitqueue_head(&btv->i2c_queue);
	INIT_LIST_HEAD(&btv->c.subs);
	INIT_LIST_HEAD(&btv->capture);
	INIT_LIST_HEAD(&btv->vcapture);
	v4l2_prio_init(&btv->prio);

	init_timer(&btv->timeout);
	btv->timeout.function = bttv_irq_timeout;
	btv->timeout.data     = (unsigned long)btv;

	btv->i2c_rc = -1;
	btv->tuner_type  = UNSET;
	btv->pinnacle_id = UNSET;
	btv->new_input   = UNSET;
	btv->has_radio=radio[btv->c.nr];

	/* pci stuff (init, get irq/mmio, ... */
	btv->c.pci = dev;
	btv->id  = dev->device;
	if (pci_enable_device(dev)) {
		printk(KERN_WARNING "bttv%d: Can't enable device.\n",
		       btv->c.nr);
		return -EIO;
	}
	if (pci_set_dma_mask(dev, DMA_32BIT_MASK)) {
		printk(KERN_WARNING "bttv%d: No suitable DMA available.\n",
		       btv->c.nr);
		return -EIO;
	}
	if (!request_mem_region(pci_resource_start(dev,0),
				pci_resource_len(dev,0),
				btv->c.name)) {
		printk(KERN_WARNING "bttv%d: can't request iomem (0x%lx).\n",
		       btv->c.nr, pci_resource_start(dev,0));
		return -EBUSY;
	}
	pci_set_master(dev);
	pci_set_command(dev);
	pci_set_drvdata(dev,btv);

	pci_read_config_byte(dev, PCI_CLASS_REVISION, &btv->revision);
	pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
	printk(KERN_INFO "bttv%d: Bt%d (rev %d) at %s, ",
	       bttv_num,btv->id, btv->revision, pci_name(dev));
	printk("irq: %d, latency: %d, mmio: 0x%lx\n",
	       btv->c.pci->irq, lat, pci_resource_start(dev,0));
	schedule();

	btv->bt848_mmio=ioremap(pci_resource_start(dev,0), 0x1000);
	if (NULL == ioremap(pci_resource_start(dev,0), 0x1000)) {
		printk("bttv%d: ioremap() failed\n", btv->c.nr);
		result = -EIO;
		goto fail1;
	}

	/* identify card */
	bttv_idcard(btv);

	/* disable irqs, register irq handler */
	btwrite(0, BT848_INT_MASK);
	result = request_irq(btv->c.pci->irq, bttv_irq,
			     SA_SHIRQ | SA_INTERRUPT,btv->c.name,(void *)btv);
	if (result < 0) {
		printk(KERN_ERR "bttv%d: can't get IRQ %d\n",
		       bttv_num,btv->c.pci->irq);
		goto fail1;
	}

	if (0 != bttv_handle_chipset(btv)) {
		result = -EIO;
		goto fail2;
	}

	/* init options from insmod args */
	btv->opt_combfilter = combfilter;
	btv->opt_lumafilter = lumafilter;
	btv->opt_automute   = automute;
	btv->opt_chroma_agc = chroma_agc;
	btv->opt_adc_crush  = adc_crush;
	btv->opt_vcr_hack   = vcr_hack;
	btv->opt_whitecrush_upper  = whitecrush_upper;
	btv->opt_whitecrush_lower  = whitecrush_lower;
	btv->opt_uv_ratio   = uv_ratio;
	btv->opt_full_luma_range   = full_luma_range;
	btv->opt_coring     = coring;

	/* fill struct bttv with some useful defaults */
	btv->init.btv         = btv;
	btv->init.ov.w.width  = 320;
	btv->init.ov.w.height = 240;
	btv->init.fmt         = format_by_palette(VIDEO_PALETTE_RGB24);
	btv->init.width       = 320;
	btv->init.height      = 240;
	btv->init.lines       = 16;
	btv->input = 0;

	/* initialize hardware */
	if (bttv_gpio)
		bttv_gpio_tracking(btv,"pre-init");

	bttv_risc_init_main(btv);
	init_bt848(btv);

	/* gpio */
	btwrite(0x00, BT848_GPIO_REG_INP);
	btwrite(0x00, BT848_GPIO_OUT_EN);
	if (bttv_verbose)
		bttv_gpio_tracking(btv,"init");

	/* needs to be done before i2c is registered */
	bttv_init_card1(btv);

	/* register i2c + gpio */
	init_bttv_i2c(btv);

	/* some card-specific stuff (needs working i2c) */
	bttv_init_card2(btv);
	init_irqreg(btv);

	/* register video4linux + input */
	if (!bttv_tvcards[btv->c.type].no_video) {
		bttv_register_video(btv);
		bt848_bright(btv,32768);
		bt848_contrast(btv,32768);
		bt848_hue(btv,32768);
		bt848_sat(btv,32768);
		audio_mux(btv,AUDIO_MUTE);
		set_input(btv,0);
	}

	/* add subdevices */
	if (btv->has_remote)
		bttv_sub_add_device(&btv->c, "remote");
	if (bttv_tvcards[btv->c.type].has_dvb)
		bttv_sub_add_device(&btv->c, "dvb");

	/* everything is fine */
	bttv_num++;
	return 0;

 fail2:
	free_irq(btv->c.pci->irq,btv);

 fail1:
	if (btv->bt848_mmio)
		iounmap(btv->bt848_mmio);
	release_mem_region(pci_resource_start(btv->c.pci,0),
			   pci_resource_len(btv->c.pci,0));
	pci_set_drvdata(dev,NULL);
	return result;
}

static void __devexit bttv_remove(struct pci_dev *pci_dev)
{
	struct bttv *btv = pci_get_drvdata(pci_dev);

	if (bttv_verbose)
		printk("bttv%d: unloading\n",btv->c.nr);

	/* shutdown everything (DMA+IRQs) */
	btand(~15, BT848_GPIO_DMA_CTL);
	btwrite(0, BT848_INT_MASK);
	btwrite(~0x0, BT848_INT_STAT);
	btwrite(0x0, BT848_GPIO_OUT_EN);
	if (bttv_gpio)
		bttv_gpio_tracking(btv,"cleanup");

	/* tell gpio modules we are leaving ... */
	btv->shutdown=1;
	wake_up(&btv->gpioq);
	bttv_sub_del_devices(&btv->c);

	/* unregister i2c_bus + input */
	fini_bttv_i2c(btv);

	/* unregister video4linux */
	bttv_unregister_video(btv);

	/* free allocated memory */
	btcx_riscmem_free(btv->c.pci,&btv->main);

	/* free ressources */
	free_irq(btv->c.pci->irq,btv);
	iounmap(btv->bt848_mmio);
	release_mem_region(pci_resource_start(btv->c.pci,0),
			   pci_resource_len(btv->c.pci,0));

	pci_set_drvdata(pci_dev, NULL);
	return;
}

static int bttv_suspend(struct pci_dev *pci_dev, pm_message_t state)
{
	struct bttv *btv = pci_get_drvdata(pci_dev);
	struct bttv_buffer_set idle;
	unsigned long flags;

	dprintk("bttv%d: suspend %d\n", btv->c.nr, state.event);

	/* stop dma + irqs */
	spin_lock_irqsave(&btv->s_lock,flags);
	memset(&idle, 0, sizeof(idle));
	btv->state.video = btv->curr;
	btv->state.vbi   = btv->cvbi;
	btv->state.loop_irq = btv->loop_irq;
	btv->curr = idle;
	btv->loop_irq = 0;
	bttv_buffer_activate_video(btv, &idle);
	bttv_buffer_activate_vbi(btv, NULL);
	bttv_set_dma(btv, 0);
	btwrite(0, BT848_INT_MASK);
	spin_unlock_irqrestore(&btv->s_lock,flags);

	/* save bt878 state */
	btv->state.gpio_enable = btread(BT848_GPIO_OUT_EN);
	btv->state.gpio_data   = gpio_read();

	/* save pci state */
	pci_save_state(pci_dev);
	if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
		pci_disable_device(pci_dev);
		btv->state.disabled = 1;
	}
	return 0;
}

static int bttv_resume(struct pci_dev *pci_dev)
{
	struct bttv *btv = pci_get_drvdata(pci_dev);
	unsigned long flags;
	int err;

	dprintk("bttv%d: resume\n", btv->c.nr);

	/* restore pci state */
	if (btv->state.disabled) {
		err=pci_enable_device(pci_dev);
		if (err) {
			printk(KERN_WARNING "bttv%d: Can't enable device.\n",
								btv->c.nr);
			return err;
		}
		btv->state.disabled = 0;
	}
	err=pci_set_power_state(pci_dev, PCI_D0);
	if (err) {
		pci_disable_device(pci_dev);
		printk(KERN_WARNING "bttv%d: Can't enable device.\n",
							btv->c.nr);
		btv->state.disabled = 1;
		return err;
	}

	pci_restore_state(pci_dev);

	/* restore bt878 state */
	bttv_reinit_bt848(btv);
	gpio_inout(0xffffff, btv->state.gpio_enable);
	gpio_write(btv->state.gpio_data);

	/* restart dma */
	spin_lock_irqsave(&btv->s_lock,flags);
	btv->curr = btv->state.video;
	btv->cvbi = btv->state.vbi;
	btv->loop_irq = btv->state.loop_irq;
	bttv_buffer_activate_video(btv, &btv->curr);
	bttv_buffer_activate_vbi(btv, btv->cvbi);
	bttv_set_dma(btv, 0);
	spin_unlock_irqrestore(&btv->s_lock,flags);
	return 0;
}

static struct pci_device_id bttv_pci_tbl[] = {
	{PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BT848,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BT849,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BT878,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BT879,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0,}
};

MODULE_DEVICE_TABLE(pci, bttv_pci_tbl);

static struct pci_driver bttv_pci_driver = {
	.name     = "bttv",
	.id_table = bttv_pci_tbl,
	.probe    = bttv_probe,
	.remove   = __devexit_p(bttv_remove),
	.suspend  = bttv_suspend,
	.resume   = bttv_resume,
};

static int bttv_init_module(void)
{
	bttv_num = 0;

	printk(KERN_INFO "bttv: driver version %d.%d.%d loaded\n",
	       (BTTV_VERSION_CODE >> 16) & 0xff,
	       (BTTV_VERSION_CODE >> 8) & 0xff,
	       BTTV_VERSION_CODE & 0xff);
#ifdef SNAPSHOT
	printk(KERN_INFO "bttv: snapshot date %04d-%02d-%02d\n",
	       SNAPSHOT/10000, (SNAPSHOT/100)%100, SNAPSHOT%100);
#endif
	if (gbuffers < 2 || gbuffers > VIDEO_MAX_FRAME)
		gbuffers = 2;
	if (gbufsize < 0 || gbufsize > BTTV_MAX_FBUF)
		gbufsize = BTTV_MAX_FBUF;
	gbufsize = (gbufsize + PAGE_SIZE - 1) & PAGE_MASK;
	if (bttv_verbose)
		printk(KERN_INFO "bttv: using %d buffers with %dk (%d pages) each for capture\n",
		       gbuffers, gbufsize >> 10, gbufsize >> PAGE_SHIFT);

	bttv_check_chipset();

	bus_register(&bttv_sub_bus_type);
	return pci_module_init(&bttv_pci_driver);
}

static void bttv_cleanup_module(void)
{
	pci_unregister_driver(&bttv_pci_driver);
	bus_unregister(&bttv_sub_bus_type);
	return;
}

module_init(bttv_init_module);
module_exit(bttv_cleanup_module);

/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */