bttv-driver.c

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/*

    bttv - Bt848 frame grabber driver

    Copyright (C) 1996,97,98 Ralph  Metzler <[e-mail]>
			   & Marcus Metzler <[e-mail]>
    (c) 1999-2002 Gerd Knorr <[e-mail]>

    some v4l2 code lines are taken from Justin's bttv2 driver which is
    (c) 2000 Justin Schoeman <[e-mail]>

    V4L1 removal from:
    (c) 2005-2006 Nickolay V. Shmyrev <[e-mail]>

    Fixes to be fully V4L2 compliant by
    (c) 2006 Mauro Carvalho Chehab <[e-mail]>

    Cropping and overscan support
    Copyright (C) 2005, 2006 Michael H. Schimek <[e-mail]>
    Sponsored by OPQ Systems AB

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <linux/init.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/kdev_t.h>
#include "bttvp.h"
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/tvaudio.h>
#include <media/msp3400.h>

#include <linux/dma-mapping.h>

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

#include <media/rds.h>


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

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

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

static int video_nr[BTTV_MAX] = { [0 ... (BTTV_MAX-1)] = -1 };
static int radio_nr[BTTV_MAX] = { [0 ... (BTTV_MAX-1)] = -1 };
static int vbi_nr[BTTV_MAX] = { [0 ... (BTTV_MAX-1)] = -1 };
static int debug_latency;

static unsigned int fdsr;

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

/* 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(gbuffers,          int, 0444);
module_param(gbufsize,          int, 0444);
module_param(reset_crop,        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_param_array(video_nr,    int, NULL, 0444);
module_param_array(radio_nr,    int, NULL, 0444);
module_param_array(vbi_nr,      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(reset_crop,"reset cropping parameters at open(), default "
		 "is 1 (yes) for compatibility with older applications");
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_PARM_DESC(video_nr, "video device numbers");
MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
MODULE_PARM_DESC(radio_nr, "radio device numbers");

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 device *cd,
			 struct device_attribute *attr, char *buf)
{
	struct video_device *vfd = container_of(cd, struct video_device, dev);
	struct bttv *btv = dev_get_drvdata(vfd->parent);
	return sprintf(buf, "%d\n", btv ? btv->c.type : UNSET);
}
static DEVICE_ATTR(card, S_IRUGO, show_card, NULL);

/* ----------------------------------------------------------------------- */
/* dvb auto-load setup                                                     */
#if defined(CONFIG_MODULES) && defined(MODULE)
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
static void request_module_async(void *ptr)
#else
static void request_module_async(struct work_struct *work)
#endif
{
	request_module("dvb-bt8xx");
}

static void request_modules(struct bttv *dev)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
	INIT_WORK(&dev->request_module_wk, request_module_async, (void*)dev);
#else
	INIT_WORK(&dev->request_module_wk, request_module_async);
#endif
	schedule_work(&dev->request_module_wk);
}
#else
#define request_modules(dev)
#endif /* CONFIG_MODULES */


/* ----------------------------------------------------------------------- */
/* 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
	}
};

/* minhdelayx1	first video pixel we can capture on a line and
   hdelayx1	start of active video, both relative to rising edge of
		/HRESET pulse (0H) in 1 / fCLKx1.
   swidth	width of active video and
   totalwidth	total line width, both in 1 / fCLKx1.
   sqwidth	total line width in square pixels.
   vdelay	start of active video in 2 * field lines relative to
		trailing edge of /VRESET pulse (VDELAY register).
   sheight	height of active video in 2 * field lines.
   videostart0	ITU-R frame line number of the line corresponding
		to vdelay in the first field. */
#define CROPCAP(minhdelayx1, hdelayx1, swidth, totalwidth, sqwidth,	 \
		vdelay, sheight, videostart0)				 \
	.cropcap.bounds.left = minhdelayx1,				 \
	/* * 2 because vertically we count field lines times two, */	 \
	/* e.g. 23 * 2 to 23 * 2 + 576 in PAL-BGHI defrect. */		 \
	.cropcap.bounds.top = (videostart0) * 2 - (vdelay) + MIN_VDELAY, \
	/* 4 is a safety margin at the end of the line. */		 \
	.cropcap.bounds.width = (totalwidth) - (minhdelayx1) - 4,	 \
	.cropcap.bounds.height = (sheight) + (vdelay) - MIN_VDELAY,	 \
	.cropcap.defrect.left = hdelayx1,				 \
	.cropcap.defrect.top = (videostart0) * 2,			 \
	.cropcap.defrect.width = swidth,				 \
	.cropcap.defrect.height = sheight,				 \
	.cropcap.pixelaspect.numerator = totalwidth,			 \
	.cropcap.pixelaspect.denominator = sqwidth,

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, /* min (2048 / 4, 0x1ff) & 0xff */
		.sram           = 0,
		/* ITU-R frame line number of the first VBI line
		   we can capture, of the first and second field.
		   The last line is determined by cropcap.bounds. */
		.vbistart       = { 7, 320 },
		CROPCAP(/* minhdelayx1 */ 68,
			/* hdelayx1 */ 186,
			/* Should be (768 * 1135 + 944 / 2) / 944.
			   cropcap.defrect is used for image width
			   checks, so we keep the old value 924. */
			/* swidth */ 924,
			/* totalwidth */ 1135,
			/* sqwidth */ 944,
			/* vdelay */ 0x20,
			/* sheight */ 576,
			/* videostart0 */ 23)
		/* bt878 (and bt848?) can capture another
		   line below active video. */
		.cropcap.bounds.height = (576 + 2) + 0x20 - 2,
	},{
		.v4l2_id        = V4L2_STD_NTSC_M | V4L2_STD_NTSC_M_KR,
		.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, /* min (1600 / 4, 0x1ff) & 0xff */
		.sram           = 1,
		.vbistart	= { 10, 273 },
		CROPCAP(/* minhdelayx1 */ 68,
			/* hdelayx1 */ 128,
			/* Should be (640 * 910 + 780 / 2) / 780? */
			/* swidth */ 768,
			/* totalwidth */ 910,
			/* sqwidth */ 780,
			/* vdelay */ 0x1a,
			/* sheight */ 480,
			/* videostart0 */ 23)
	},{
		.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? */
		.vbistart	= { 7, 320 },
		CROPCAP(/* minhdelayx1 */ 68,
			/* hdelayx1 */ 186,
			/* swidth */ 924,
			/* totalwidth */ 1135,
			/* sqwidth */ 944,
			/* vdelay */ 0x20,
			/* sheight */ 576,
			/* videostart0 */ 23)
	},{
		.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,
		.vbistart	= { 7, 320 },
		CROPCAP(/* minhdelayx1 */ 68,
			/* hdelayx1 */ 130,
			/* swidth */ (640 * 910 + 780 / 2) / 780,
			/* totalwidth */ 910,
			/* sqwidth */ 780,
			/* vdelay */ 0x1a,
			/* sheight */ 576,
			/* videostart0 */ 23)
	},{
		.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,
		.vbistart	= { 10, 273 },
		CROPCAP(/* minhdelayx1 */ 68,
			/* hdelayx1 */ 135,
			/* swidth */ (640 * 910 + 780 / 2) / 780,
			/* totalwidth */ 910,
			/* sqwidth */ 780,
			/* vdelay */ 0x1a,
			/* sheight */ 480,
			/* videostart0 */ 23)
	},{
		.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,
		.vbistart       = { 7, 320 },
		CROPCAP(/* minhdelayx1 */ 68,
			/* hdelayx1 */ 186,
			/* swidth */ (768 * 1135 + 944 / 2) / 944,
			/* totalwidth */ 1135,
			/* sqwidth */ 944,
			/* vdelay */ 0x20,
			/* sheight */ 576,
			/* videostart0 */ 23)
	},{
		.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,
		.vbistart       = { 10, 273 },
		CROPCAP(/* minhdelayx1 */ 68,
			/* hdelayx1 */ 135,
			/* swidth */ (640 * 910 + 780 / 2) / 780,
			/* totalwidth */ 910,
			/* sqwidth */ 780,
			/* vdelay */ 0x16,
			/* sheight */ 480,
			/* videostart0 */ 23)
	},{
		/* 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,
		.vbistart	= { 10, 273 },
		CROPCAP(/* minhdelayx1 */ 68,
			/* hdelayx1 */ 186,
			/* swidth */ 924,
			/* totalwidth */ 1135,
			/* sqwidth */ 944,
			/* vdelay */ 0x1a,
			/* sheight */ 480,
			/* videostart0 */ 23)
	}
};
static const unsigned int BTTV_TVNORMS = ARRAY_SIZE(bttv_tvnorms);

/* ----------------------------------------------------------------------- */
/* bttv format list
   packed pixel formats must come first */