[deliverable/linux.git] / drivers / media / i2c / saa7115.c

/* saa711x - Philips SAA711x video decoder driver
 * This driver can work with saa7111, saa7111a, saa7113, saa7114,
 *			     saa7115 and saa7118.
 *
 * Based on saa7114 driver by Maxim Yevtyushkin, which is based on
 * the saa7111 driver by Dave Perks.
 *
 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
 * Copyright (C) 2002 Maxim Yevtyushkin <max@linuxmedialabs.com>
 *
 * Slight changes for video timing and attachment output by
 * Wolfgang Scherr <scherr@net4you.net>
 *
 * Moved over to the linux >= 2.4.x i2c protocol (1/1/2003)
 * by Ronald Bultje <rbultje@ronald.bitfreak.net>
 *
 * Added saa7115 support by Kevin Thayer <nufan_wfk at yahoo.com>
 * (2/17/2003)
 *
 * VBI support (2004) and cleanups (2005) by Hans Verkuil <hverkuil@xs4all.nl>
 *
 * Copyright (c) 2005-2006 Mauro Carvalho Chehab <mchehab@infradead.org>
 *	SAA7111, SAA7113 and SAA7118 support
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#include "saa711x_regs.h"

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-mc.h>
#include <media/i2c/saa7115.h>
#include <asm/div64.h>

#define VRES_60HZ	(480+16)

MODULE_DESCRIPTION("Philips SAA7111/SAA7113/SAA7114/SAA7115/SAA7118 video decoder driver");
MODULE_AUTHOR(  "Maxim Yevtyushkin, Kevin Thayer, Chris Kennedy, "
		"Hans Verkuil, Mauro Carvalho Chehab");
MODULE_LICENSE("GPL");

static bool debug;
module_param(debug, bool, 0644);

MODULE_PARM_DESC(debug, "Debug level (0-1)");


enum saa711x_model {
	SAA7111A,
	SAA7111,
	SAA7113,
	GM7113C,
	SAA7114,
	SAA7115,
	SAA7118,
};

struct saa711x_state {
	struct v4l2_subdev sd;
#ifdef CONFIG_MEDIA_CONTROLLER
	struct media_pad pads[DEMOD_NUM_PADS];
#endif
	struct v4l2_ctrl_handler hdl;

	struct {
		/* chroma gain control cluster */
		struct v4l2_ctrl *agc;
		struct v4l2_ctrl *gain;
	};

	v4l2_std_id std;
	int input;
	int output;
	int enable;
	int radio;
	int width;
	int height;
	enum saa711x_model ident;
	u32 audclk_freq;
	u32 crystal_freq;
	bool ucgc;
	u8 cgcdiv;
	bool apll;
	bool double_asclk;
};

static inline struct saa711x_state *to_state(struct v4l2_subdev *sd)
{
	return container_of(sd, struct saa711x_state, sd);
}

static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
	return &container_of(ctrl->handler, struct saa711x_state, hdl)->sd;
}

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

static inline int saa711x_write(struct v4l2_subdev *sd, u8 reg, u8 value)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return i2c_smbus_write_byte_data(client, reg, value);
}

/* Sanity routine to check if a register is present */
static int saa711x_has_reg(const int id, const u8 reg)
{
	if (id == SAA7111)
		return reg < 0x20 && reg != 0x01 && reg != 0x0f &&
		       (reg < 0x13 || reg > 0x19) && reg != 0x1d && reg != 0x1e;
	if (id == SAA7111A)
		return reg < 0x20 && reg != 0x01 && reg != 0x0f &&
		       reg != 0x14 && reg != 0x18 && reg != 0x19 &&
		       reg != 0x1d && reg != 0x1e;

	/* common for saa7113/4/5/8 */
	if (unlikely((reg >= 0x3b && reg <= 0x3f) || reg == 0x5c || reg == 0x5f ||
	    reg == 0xa3 || reg == 0xa7 || reg == 0xab || reg == 0xaf || (reg >= 0xb5 && reg <= 0xb7) ||
	    reg == 0xd3 || reg == 0xd7 || reg == 0xdb || reg == 0xdf || (reg >= 0xe5 && reg <= 0xe7) ||
	    reg == 0x82 || (reg >= 0x89 && reg <= 0x8e)))
		return 0;

	switch (id) {
	case GM7113C:
		return reg != 0x14 && (reg < 0x18 || reg > 0x1e) && reg < 0x20;
	case SAA7113:
		return reg != 0x14 && (reg < 0x18 || reg > 0x1e) && (reg < 0x20 || reg > 0x3f) &&
		       reg != 0x5d && reg < 0x63;
	case SAA7114:
		return (reg < 0x1a || reg > 0x1e) && (reg < 0x20 || reg > 0x2f) &&
		       (reg < 0x63 || reg > 0x7f) && reg != 0x33 && reg != 0x37 &&
		       reg != 0x81 && reg < 0xf0;
	case SAA7115:
		return (reg < 0x20 || reg > 0x2f) && reg != 0x65 && (reg < 0xfc || reg > 0xfe);
	case SAA7118:
		return (reg < 0x1a || reg > 0x1d) && (reg < 0x20 || reg > 0x22) &&
		       (reg < 0x26 || reg > 0x28) && reg != 0x33 && reg != 0x37 &&
		       (reg < 0x63 || reg > 0x7f) && reg != 0x81 && reg < 0xf0;
	}
	return 1;
}

static int saa711x_writeregs(struct v4l2_subdev *sd, const unsigned char *regs)
{
	struct saa711x_state *state = to_state(sd);
	unsigned char reg, data;

	while (*regs != 0x00) {
		reg = *(regs++);
		data = *(regs++);

		/* According with datasheets, reserved regs should be
		   filled with 0 - seems better not to touch on they */
		if (saa711x_has_reg(state->ident, reg)) {
			if (saa711x_write(sd, reg, data) < 0)
				return -1;
		} else {
			v4l2_dbg(1, debug, sd, "tried to access reserved reg 0x%02x\n", reg);
		}
	}
	return 0;
}

static inline int saa711x_read(struct v4l2_subdev *sd, u8 reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return i2c_smbus_read_byte_data(client, reg);
}

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

/* SAA7111 initialization table */
static const unsigned char saa7111_init[] = {
	R_01_INC_DELAY, 0x00,		/* reserved */

	/*front end */
	R_02_INPUT_CNTL_1, 0xd0,	/* FUSE=3, GUDL=2, MODE=0 */
	R_03_INPUT_CNTL_2, 0x23,	/* HLNRS=0, VBSL=1, WPOFF=0, HOLDG=0,
					 * GAFIX=0, GAI1=256, GAI2=256 */
	R_04_INPUT_CNTL_3, 0x00,	/* GAI1=256 */
	R_05_INPUT_CNTL_4, 0x00,	/* GAI2=256 */

	/* decoder */
	R_06_H_SYNC_START, 0xf3,	/* HSB at  13(50Hz) /  17(60Hz)
					 * pixels after end of last line */
	R_07_H_SYNC_STOP, 0xe8,		/* HSS seems to be needed to
					 * work with NTSC, too */
	R_08_SYNC_CNTL, 0xc8,		/* AUFD=1, FSEL=1, EXFIL=0,
					 * VTRC=1, HPLL=0, VNOI=0 */
	R_09_LUMA_CNTL, 0x01,		/* BYPS=0, PREF=0, BPSS=0,
					 * VBLB=0, UPTCV=0, APER=1 */
	R_0A_LUMA_BRIGHT_CNTL, 0x80,
	R_0B_LUMA_CONTRAST_CNTL, 0x47,	/* 0b - CONT=1.109 */
	R_0C_CHROMA_SAT_CNTL, 0x40,
	R_0D_CHROMA_HUE_CNTL, 0x00,
	R_0E_CHROMA_CNTL_1, 0x01,	/* 0e - CDTO=0, CSTD=0, DCCF=0,
					 * FCTC=0, CHBW=1 */
	R_0F_CHROMA_GAIN_CNTL, 0x00,	/* reserved */
	R_10_CHROMA_CNTL_2, 0x48,	/* 10 - OFTS=1, HDEL=0, VRLN=1, YDEL=0 */
	R_11_MODE_DELAY_CNTL, 0x1c,	/* 11 - GPSW=0, CM99=0, FECO=0, COMPO=1,
					 * OEYC=1, OEHV=1, VIPB=0, COLO=0 */
	R_12_RT_SIGNAL_CNTL, 0x00,	/* 12 - output control 2 */
	R_13_RT_X_PORT_OUT_CNTL, 0x00,	/* 13 - output control 3 */
	R_14_ANAL_ADC_COMPAT_CNTL, 0x00,
	R_15_VGATE_START_FID_CHG, 0x00,
	R_16_VGATE_STOP, 0x00,
	R_17_MISC_VGATE_CONF_AND_MSB, 0x00,

	0x00, 0x00
};

/*
 * This table has one illegal value, and some values that are not
 * correct according to the datasheet initialization table.
 *
 *  If you need a table with legal/default values tell the driver in
 *  i2c_board_info.platform_data, and you will get the gm7113c_init
 *  table instead.
 */

/* SAA7113 Init codes */
static const unsigned char saa7113_init[] = {
	R_01_INC_DELAY, 0x08,
	R_02_INPUT_CNTL_1, 0xc2,
	R_03_INPUT_CNTL_2, 0x30,
	R_04_INPUT_CNTL_3, 0x00,
	R_05_INPUT_CNTL_4, 0x00,
	R_06_H_SYNC_START, 0x89,	/* Illegal value -119,
					 * min. value = -108 (0x94) */
	R_07_H_SYNC_STOP, 0x0d,
	R_08_SYNC_CNTL, 0x88,		/* Not datasheet default.
					 * HTC = VTR mode, should be 0x98 */
	R_09_LUMA_CNTL, 0x01,
	R_0A_LUMA_BRIGHT_CNTL, 0x80,
	R_0B_LUMA_CONTRAST_CNTL, 0x47,
	R_0C_CHROMA_SAT_CNTL, 0x40,
	R_0D_CHROMA_HUE_CNTL, 0x00,
	R_0E_CHROMA_CNTL_1, 0x01,
	R_0F_CHROMA_GAIN_CNTL, 0x2a,
	R_10_CHROMA_CNTL_2, 0x08,	/* Not datsheet default.
					 * VRLN enabled, should be 0x00 */
	R_11_MODE_DELAY_CNTL, 0x0c,
	R_12_RT_SIGNAL_CNTL, 0x07,	/* Not datasheet default,
					 * should be 0x01 */
	R_13_RT_X_PORT_OUT_CNTL, 0x00,
	R_14_ANAL_ADC_COMPAT_CNTL, 0x00,
	R_15_VGATE_START_FID_CHG, 0x00,
	R_16_VGATE_STOP, 0x00,
	R_17_MISC_VGATE_CONF_AND_MSB, 0x00,

	0x00, 0x00
};

/*
 * GM7113C is a clone of the SAA7113 chip
 *  This init table is copied out of the saa7113 datasheet.
 *  In R_08 we enable "Automatic Field Detection" [AUFD],
 *  this is disabled when saa711x_set_v4lstd is called.
 */
static const unsigned char gm7113c_init[] = {
	R_01_INC_DELAY, 0x08,
	R_02_INPUT_CNTL_1, 0xc0,
	R_03_INPUT_CNTL_2, 0x33,
	R_04_INPUT_CNTL_3, 0x00,
	R_05_INPUT_CNTL_4, 0x00,
	R_06_H_SYNC_START, 0xe9,
	R_07_H_SYNC_STOP, 0x0d,
	R_08_SYNC_CNTL, 0x98,
	R_09_LUMA_CNTL, 0x01,
	R_0A_LUMA_BRIGHT_CNTL, 0x80,
	R_0B_LUMA_CONTRAST_CNTL, 0x47,
	R_0C_CHROMA_SAT_CNTL, 0x40,
	R_0D_CHROMA_HUE_CNTL, 0x00,
	R_0E_CHROMA_CNTL_1, 0x01,
	R_0F_CHROMA_GAIN_CNTL, 0x2a,
	R_10_CHROMA_CNTL_2, 0x00,
	R_11_MODE_DELAY_CNTL, 0x0c,
	R_12_RT_SIGNAL_CNTL, 0x01,
	R_13_RT_X_PORT_OUT_CNTL, 0x00,
	R_14_ANAL_ADC_COMPAT_CNTL, 0x00,
	R_15_VGATE_START_FID_CHG, 0x00,
	R_16_VGATE_STOP, 0x00,
	R_17_MISC_VGATE_CONF_AND_MSB, 0x00,

	0x00, 0x00
};

/* If a value differs from the Hauppauge driver values, then the comment starts with
   'was 0xXX' to denote the Hauppauge value. Otherwise the value is identical to what the
   Hauppauge driver sets. */

/* SAA7114 and SAA7115 initialization table */
static const unsigned char saa7115_init_auto_input[] = {
		/* Front-End Part */
	R_01_INC_DELAY, 0x48,			/* white peak control disabled */
	R_03_INPUT_CNTL_2, 0x20,		/* was 0x30. 0x20: long vertical blanking */
	R_04_INPUT_CNTL_3, 0x90,		/* analog gain set to 0 */
	R_05_INPUT_CNTL_4, 0x90,		/* analog gain set to 0 */
		/* Decoder Part */
	R_06_H_SYNC_START, 0xeb,		/* horiz sync begin = -21 */
	R_07_H_SYNC_STOP, 0xe0,			/* horiz sync stop = -17 */
	R_09_LUMA_CNTL, 0x53,			/* 0x53, was 0x56 for 60hz. luminance control */
	R_0A_LUMA_BRIGHT_CNTL, 0x80,		/* was 0x88. decoder brightness, 0x80 is itu standard */
	R_0B_LUMA_CONTRAST_CNTL, 0x44,		/* was 0x48. decoder contrast, 0x44 is itu standard */
	R_0C_CHROMA_SAT_CNTL, 0x40,		/* was 0x47. decoder saturation, 0x40 is itu standard */
	R_0D_CHROMA_HUE_CNTL, 0x00,
	R_0F_CHROMA_GAIN_CNTL, 0x00,		/* use automatic gain  */
	R_10_CHROMA_CNTL_2, 0x06,		/* chroma: active adaptive combfilter */
	R_11_MODE_DELAY_CNTL, 0x00,
	R_12_RT_SIGNAL_CNTL, 0x9d,		/* RTS0 output control: VGATE */
	R_13_RT_X_PORT_OUT_CNTL, 0x80,		/* ITU656 standard mode, RTCO output enable RTCE */
	R_14_ANAL_ADC_COMPAT_CNTL, 0x00,
	R_18_RAW_DATA_GAIN_CNTL, 0x40,		/* gain 0x00 = nominal */
	R_19_RAW_DATA_OFF_CNTL, 0x80,
	R_1A_COLOR_KILL_LVL_CNTL, 0x77,		/* recommended value */
	R_1B_MISC_TVVCRDET, 0x42,		/* recommended value */
	R_1C_ENHAN_COMB_CTRL1, 0xa9,		/* recommended value */
	R_1D_ENHAN_COMB_CTRL2, 0x01,		/* recommended value */


	R_80_GLOBAL_CNTL_1, 0x0,		/* No tasks enabled at init */

		/* Power Device Control */
	R_88_POWER_SAVE_ADC_PORT_CNTL, 0xd0,	/* reset device */
	R_88_POWER_SAVE_ADC_PORT_CNTL, 0xf0,	/* set device programmed, all in operational mode */
	0x00, 0x00
};

/* Used to reset saa7113, saa7114 and saa7115 */
static const unsigned char saa7115_cfg_reset_scaler[] = {
	R_87_I_PORT_I_O_ENA_OUT_CLK_AND_GATED, 0x00,	/* disable I-port output */
	R_88_POWER_SAVE_ADC_PORT_CNTL, 0xd0,		/* reset scaler */
	R_88_POWER_SAVE_ADC_PORT_CNTL, 0xf0,		/* activate scaler */
	R_87_I_PORT_I_O_ENA_OUT_CLK_AND_GATED, 0x01,	/* enable I-port output */
	0x00, 0x00
};

/* ============== SAA7715 VIDEO templates =============  */

static const unsigned char saa7115_cfg_60hz_video[] = {
	R_80_GLOBAL_CNTL_1, 0x00,			/* reset tasks */
	R_88_POWER_SAVE_ADC_PORT_CNTL, 0xd0,		/* reset scaler */

	R_15_VGATE_START_FID_CHG, 0x03,
	R_16_VGATE_STOP, 0x11,
	R_17_MISC_VGATE_CONF_AND_MSB, 0x9c,

	R_08_SYNC_CNTL, 0x68,			/* 0xBO: auto detection, 0x68 = NTSC */
	R_0E_CHROMA_CNTL_1, 0x07,		/* video autodetection is on */

	R_5A_V_OFF_FOR_SLICER, 0x06,		/* standard 60hz value for ITU656 line counting */

	/* Task A */
	R_90_A_TASK_HANDLING_CNTL, 0x80,
	R_91_A_X_PORT_FORMATS_AND_CONF, 0x48,
	R_92_A_X_PORT_INPUT_REFERENCE_SIGNAL, 0x40,
	R_93_A_I_PORT_OUTPUT_FORMATS_AND_CONF, 0x84,

	/* hoffset low (input), 0x0002 is minimum */
	R_94_A_HORIZ_INPUT_WINDOW_START, 0x01,
	R_95_A_HORIZ_INPUT_WINDOW_START_MSB, 0x00,

	/* hsize low (input), 0x02d0 = 720 */
	R_96_A_HORIZ_INPUT_WINDOW_LENGTH, 0xd0,
	R_97_A_HORIZ_INPUT_WINDOW_LENGTH_MSB, 0x02,

	R_98_A_VERT_INPUT_WINDOW_START, 0x05,
	R_99_A_VERT_INPUT_WINDOW_START_MSB, 0x00,

	R_9A_A_VERT_INPUT_WINDOW_LENGTH, 0x0c,
	R_9B_A_VERT_INPUT_WINDOW_LENGTH_MSB, 0x00,

	R_9C_A_HORIZ_OUTPUT_WINDOW_LENGTH, 0xa0,
	R_9D_A_HORIZ_OUTPUT_WINDOW_LENGTH_MSB, 0x05,

	R_9E_A_VERT_OUTPUT_WINDOW_LENGTH, 0x0c,
	R_9F_A_VERT_OUTPUT_WINDOW_LENGTH_MSB, 0x00,

	/* Task B */
	R_C0_B_TASK_HANDLING_CNTL, 0x00,
	R_C1_B_X_PORT_FORMATS_AND_CONF, 0x08,
	R_C2_B_INPUT_REFERENCE_SIGNAL_DEFINITION, 0x00,
	R_C3_B_I_PORT_FORMATS_AND_CONF, 0x80,

	/* 0x0002 is minimum */
	R_C4_B_HORIZ_INPUT_WINDOW_START, 0x02,
	R_C5_B_HORIZ_INPUT_WINDOW_START_MSB, 0x00,

	/* 0x02d0 = 720 */
	R_C6_B_HORIZ_INPUT_WINDOW_LENGTH, 0xd0,
	R_C7_B_HORIZ_INPUT_WINDOW_LENGTH_MSB, 0x02,

	/* vwindow start 0x12 = 18 */
	R_C8_B_VERT_INPUT_WINDOW_START, 0x12,
	R_C9_B_VERT_INPUT_WINDOW_START_MSB, 0x00,

	/* vwindow length 0xf8 = 248 */
	R_CA_B_VERT_INPUT_WINDOW_LENGTH, VRES_60HZ>>1,
	R_CB_B_VERT_INPUT_WINDOW_LENGTH_MSB, VRES_60HZ>>9,

	/* hwindow 0x02d0 = 720 */
	R_CC_B_HORIZ_OUTPUT_WINDOW_LENGTH, 0xd0,
	R_CD_B_HORIZ_OUTPUT_WINDOW_LENGTH_MSB, 0x02,

	R_F0_LFCO_PER_LINE, 0xad,		/* Set PLL Register. 60hz 525 lines per frame, 27 MHz */
	R_F1_P_I_PARAM_SELECT, 0x05,		/* low bit with 0xF0 */
	R_F5_PULSGEN_LINE_LENGTH, 0xad,
	R_F6_PULSE_A_POS_LSB_AND_PULSEGEN_CONFIG, 0x01,

	0x00, 0x00
};

static const unsigned char saa7115_cfg_50hz_video[] = {
	R_80_GLOBAL_CNTL_1, 0x00,
	R_88_POWER_SAVE_ADC_PORT_CNTL, 0xd0,	/* reset scaler */

	R_15_VGATE_START_FID_CHG, 0x37,		/* VGATE start */
	R_16_VGATE_STOP, 0x16,
	R_17_MISC_VGATE_CONF_AND_MSB, 0x99,

	R_08_SYNC_CNTL, 0x28,			/* 0x28 = PAL */
	R_0E_CHROMA_CNTL_1, 0x07,

	R_5A_V_OFF_FOR_SLICER, 0x03,		/* standard 50hz value */

	/* Task A */
	R_90_A_TASK_HANDLING_CNTL, 0x81,
	R_91_A_X_PORT_FORMATS_AND_CONF, 0x48,
	R_92_A_X_PORT_INPUT_REFERENCE_SIGNAL, 0x40,
	R_93_A_I_PORT_OUTPUT_FORMATS_AND_CONF, 0x84,

	/* This is weird: the datasheet says that you should use 2 as the minimum value, */
	/* but Hauppauge uses 0, and changing that to 2 causes indeed problems (for 50hz) */
	/* hoffset low (input), 0x0002 is minimum */
	R_94_A_HORIZ_INPUT_WINDOW_START, 0x00,
	R_95_A_HORIZ_INPUT_WINDOW_START_MSB, 0x00,

	/* hsize low (input), 0x02d0 = 720 */
	R_96_A_HORIZ_INPUT_WINDOW_LENGTH, 0xd0,
	R_97_A_HORIZ_INPUT_WINDOW_LENGTH_MSB, 0x02,

	R_98_A_VERT_INPUT_WINDOW_START, 0x03,
	R_99_A_VERT_INPUT_WINDOW_START_MSB, 0x00,

	/* vsize 0x12 = 18 */
	R_9A_A_VERT_INPUT_WINDOW_LENGTH, 0x12,
	R_9B_A_VERT_INPUT_WINDOW_LENGTH_MSB, 0x00,

	/* hsize 0x05a0 = 1440 */
	R_9C_A_HORIZ_OUTPUT_WINDOW_LENGTH, 0xa0,
	R_9D_A_HORIZ_OUTPUT_WINDOW_LENGTH_MSB, 0x05,	/* hsize hi (output) */
	R_9E_A_VERT_OUTPUT_WINDOW_LENGTH, 0x12,		/* vsize low (output), 0x12 = 18 */
	R_9F_A_VERT_OUTPUT_WINDOW_LENGTH_MSB, 0x00,	/* vsize hi (output) */

	/* Task B */
	R_C0_B_TASK_HANDLING_CNTL, 0x00,
	R_C1_B_X_PORT_FORMATS_AND_CONF, 0x08,
	R_C2_B_INPUT_REFERENCE_SIGNAL_DEFINITION, 0x00,
	R_C3_B_I_PORT_FORMATS_AND_CONF, 0x80,

	/* This is weird: the datasheet says that you should use 2 as the minimum value, */
	/* but Hauppauge uses 0, and changing that to 2 causes indeed problems (for 50hz) */
	/* hoffset low (input), 0x0002 is minimum. See comment above. */
	R_C4_B_HORIZ_INPUT_WINDOW_START, 0x00,
	R_C5_B_HORIZ_INPUT_WINDOW_START_MSB, 0x00,

	/* hsize 0x02d0 = 720 */
	R_C6_B_HORIZ_INPUT_WINDOW_LENGTH, 0xd0,
	R_C7_B_HORIZ_INPUT_WINDOW_LENGTH_MSB, 0x02,

	/* voffset 0x16 = 22 */
	R_C8_B_VERT_INPUT_WINDOW_START, 0x16,
	R_C9_B_VERT_INPUT_WINDOW_START_MSB, 0x00,

	/* vsize 0x0120 = 288 */
	R_CA_B_VERT_INPUT_WINDOW_LENGTH, 0x20,
	R_CB_B_VERT_INPUT_WINDOW_LENGTH_MSB, 0x01,

	/* hsize 0x02d0 = 720 */
	R_CC_B_HORIZ_OUTPUT_WINDOW_LENGTH, 0xd0,
	R_CD_B_HORIZ_OUTPUT_WINDOW_LENGTH_MSB, 0x02,

	R_F0_LFCO_PER_LINE, 0xb0,		/* Set PLL Register. 50hz 625 lines per frame, 27 MHz */
	R_F1_P_I_PARAM_SELECT, 0x05,		/* low bit with 0xF0, (was 0x05) */
	R_F5_PULSGEN_LINE_LENGTH, 0xb0,
	R_F6_PULSE_A_POS_LSB_AND_PULSEGEN_CONFIG, 0x01,

	0x00, 0x00
};

/* ============== SAA7715 VIDEO templates (end) =======  */

static const unsigned char saa7115_cfg_vbi_on[] = {
	R_80_GLOBAL_CNTL_1, 0x00,			/* reset tasks */
	R_88_POWER_SAVE_ADC_PORT_CNTL, 0xd0,		/* reset scaler */
	R_80_GLOBAL_CNTL_1, 0x30,			/* Activate both tasks */
	R_88_POWER_SAVE_ADC_PORT_CNTL, 0xf0,		/* activate scaler */
	R_87_I_PORT_I_O_ENA_OUT_CLK_AND_GATED, 0x01,	/* Enable I-port output */

	0x00, 0x00
};

static const unsigned char saa7115_cfg_vbi_off[] = {
	R_80_GLOBAL_CNTL_1, 0x00,			/* reset tasks */
	R_88_POWER_SAVE_ADC_PORT_CNTL, 0xd0,		/* reset scaler */
	R_80_GLOBAL_CNTL_1, 0x20,			/* Activate only task "B" */
	R_88_POWER_SAVE_ADC_PORT_CNTL, 0xf0,		/* activate scaler */
	R_87_I_PORT_I_O_ENA_OUT_CLK_AND_GATED, 0x01,	/* Enable I-port output */

	0x00, 0x00
};


static const unsigned char saa7115_init_misc[] = {
	R_81_V_SYNC_FLD_ID_SRC_SEL_AND_RETIMED_V_F, 0x01,
	R_83_X_PORT_I_O_ENA_AND_OUT_CLK, 0x01,
	R_84_I_PORT_SIGNAL_DEF, 0x20,
	R_85_I_PORT_SIGNAL_POLAR, 0x21,
	R_86_I_PORT_FIFO_FLAG_CNTL_AND_ARBIT, 0xc5,
	R_87_I_PORT_I_O_ENA_OUT_CLK_AND_GATED, 0x01,

	/* Task A */
	R_A0_A_HORIZ_PRESCALING, 0x01,
	R_A1_A_ACCUMULATION_LENGTH, 0x00,
	R_A2_A_PRESCALER_DC_GAIN_AND_FIR_PREFILTER, 0x00,

	/* Configure controls at nominal value*/
	R_A4_A_LUMA_BRIGHTNESS_CNTL, 0x80,
	R_A5_A_LUMA_CONTRAST_CNTL, 0x40,
	R_A6_A_CHROMA_SATURATION_CNTL, 0x40,

	/* note: 2 x zoom ensures that VBI lines have same length as video lines. */
	R_A8_A_HORIZ_LUMA_SCALING_INC, 0x00,
	R_A9_A_HORIZ_LUMA_SCALING_INC_MSB, 0x02,

	R_AA_A_HORIZ_LUMA_PHASE_OFF, 0x00,

	/* must be horiz lum scaling / 2 */
	R_AC_A_HORIZ_CHROMA_SCALING_INC, 0x00,
	R_AD_A_HORIZ_CHROMA_SCALING_INC_MSB, 0x01,

	/* must be offset luma / 2 */
	R_AE_A_HORIZ_CHROMA_PHASE_OFF, 0x00,

	R_B0_A_VERT_LUMA_SCALING_INC, 0x00,
	R_B1_A_VERT_LUMA_SCALING_INC_MSB, 0x04,

	R_B2_A_VERT_CHROMA_SCALING_INC, 0x00,
	R_B3_A_VERT_CHROMA_SCALING_INC_MSB, 0x04,

	R_B4_A_VERT_SCALING_MODE_CNTL, 0x01,

	R_B8_A_VERT_CHROMA_PHASE_OFF_00, 0x00,
	R_B9_A_VERT_CHROMA_PHASE_OFF_01, 0x00,
	R_BA_A_VERT_CHROMA_PHASE_OFF_10, 0x00,
	R_BB_A_VERT_CHROMA_PHASE_OFF_11, 0x00,

	R_BC_A_VERT_LUMA_PHASE_OFF_00, 0x00,
	R_BD_A_VERT_LUMA_PHASE_OFF_01, 0x00,
	R_BE_A_VERT_LUMA_PHASE_OFF_10, 0x00,
	R_BF_A_VERT_LUMA_PHASE_OFF_11, 0x00,

	/* Task B */
	R_D0_B_HORIZ_PRESCALING, 0x01,
	R_D1_B_ACCUMULATION_LENGTH, 0x00,
	R_D2_B_PRESCALER_DC_GAIN_AND_FIR_PREFILTER, 0x00,

	/* Configure controls at nominal value*/
	R_D4_B_LUMA_BRIGHTNESS_CNTL, 0x80,
	R_D5_B_LUMA_CONTRAST_CNTL, 0x40,
	R_D6_B_CHROMA_SATURATION_CNTL, 0x40,

	/* hor lum scaling 0x0400 = 1 */
	R_D8_B_HORIZ_LUMA_SCALING_INC, 0x00,
	R_D9_B_HORIZ_LUMA_SCALING_INC_MSB, 0x04,

	R_DA_B_HORIZ_LUMA_PHASE_OFF, 0x00,

	/* must be hor lum scaling / 2 */
	R_DC_B_HORIZ_CHROMA_SCALING, 0x00,
	R_DD_B_HORIZ_CHROMA_SCALING_MSB, 0x02,

	/* must be offset luma / 2 */
	R_DE_B_HORIZ_PHASE_OFFSET_CRHOMA, 0x00,

	R_E0_B_VERT_LUMA_SCALING_INC, 0x00,
	R_E1_B_VERT_LUMA_SCALING_INC_MSB, 0x04,

	R_E2_B_VERT_CHROMA_SCALING_INC, 0x00,
	R_E3_B_VERT_CHROMA_SCALING_INC_MSB, 0x04,

	R_E4_B_VERT_SCALING_MODE_CNTL, 0x01,

	R_E8_B_VERT_CHROMA_PHASE_OFF_00, 0x00,
	R_E9_B_VERT_CHROMA_PHASE_OFF_01, 0x00,
	R_EA_B_VERT_CHROMA_PHASE_OFF_10, 0x00,
	R_EB_B_VERT_CHROMA_PHASE_OFF_11, 0x00,

	R_EC_B_VERT_LUMA_PHASE_OFF_00, 0x00,
	R_ED_B_VERT_LUMA_PHASE_OFF_01, 0x00,
	R_EE_B_VERT_LUMA_PHASE_OFF_10, 0x00,
	R_EF_B_VERT_LUMA_PHASE_OFF_11, 0x00,

	R_F2_NOMINAL_PLL2_DTO, 0x50,		/* crystal clock = 24.576 MHz, target = 27MHz */
	R_F3_PLL_INCREMENT, 0x46,
	R_F4_PLL2_STATUS, 0x00,
	R_F7_PULSE_A_POS_MSB, 0x4b,		/* not the recommended settings! */
	R_F8_PULSE_B_POS, 0x00,
	R_F9_PULSE_B_POS_MSB, 0x4b,
	R_FA_PULSE_C_POS, 0x00,
	R_FB_PULSE_C_POS_MSB, 0x4b,

	/* PLL2 lock detection settings: 71 lines 50% phase error */
	R_FF_S_PLL_MAX_PHASE_ERR_THRESH_NUM_LINES, 0x88,

	/* Turn off VBI */
	R_40_SLICER_CNTL_1, 0x20,             /* No framing code errors allowed. */
	R_41_LCR_BASE, 0xff,
	R_41_LCR_BASE+1, 0xff,
	R_41_LCR_BASE+2, 0xff,
	R_41_LCR_BASE+3, 0xff,
	R_41_LCR_BASE+4, 0xff,
	R_41_LCR_BASE+5, 0xff,
	R_41_LCR_BASE+6, 0xff,
	R_41_LCR_BASE+7, 0xff,
	R_41_LCR_BASE+8, 0xff,
	R_41_LCR_BASE+9, 0xff,
	R_41_LCR_BASE+10, 0xff,
	R_41_LCR_BASE+11, 0xff,
	R_41_LCR_BASE+12, 0xff,
	R_41_LCR_BASE+13, 0xff,
	R_41_LCR_BASE+14, 0xff,
	R_41_LCR_BASE+15, 0xff,
	R_41_LCR_BASE+16, 0xff,
	R_41_LCR_BASE+17, 0xff,
	R_41_LCR_BASE+18, 0xff,
	R_41_LCR_BASE+19, 0xff,
	R_41_LCR_BASE+20, 0xff,
	R_41_LCR_BASE+21, 0xff,
	R_41_LCR_BASE+22, 0xff,
	R_58_PROGRAM_FRAMING_CODE, 0x40,
	R_59_H_OFF_FOR_SLICER, 0x47,
	R_5B_FLD_OFF_AND_MSB_FOR_H_AND_V_OFF, 0x83,
	R_5D_DID, 0xbd,
	R_5E_SDID, 0x35,

	R_02_INPUT_CNTL_1, 0xc4, /* input tuner -> input 4, amplifier active */

	R_80_GLOBAL_CNTL_1, 0x20,		/* enable task B */
	R_88_POWER_SAVE_ADC_PORT_CNTL, 0xd0,
	R_88_POWER_SAVE_ADC_PORT_CNTL, 0xf0,
	0x00, 0x00
};

static int saa711x_odd_parity(u8 c)
{
	c ^= (c >> 4);
	c ^= (c >> 2);
	c ^= (c >> 1);

	return c & 1;
}

static int saa711x_decode_vps(u8 *dst, u8 *p)
{
	static const u8 biphase_tbl[] = {
		0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
		0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
		0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
		0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
		0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
		0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
		0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
		0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
		0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
		0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
		0xc3, 0x4b, 0x43, 0xc3, 0x87, 0x0f, 0x07, 0x87,
		0x83, 0x0b, 0x03, 0x83, 0xc3, 0x4b, 0x43, 0xc3,
		0xc1, 0x49, 0x41, 0xc1, 0x85, 0x0d, 0x05, 0x85,
		0x81, 0x09, 0x01, 0x81, 0xc1, 0x49, 0x41, 0xc1,
		0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
		0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
		0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
		0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
		0xc2, 0x4a, 0x42, 0xc2, 0x86, 0x0e, 0x06, 0x86,
		0x82, 0x0a, 0x02, 0x82, 0xc2, 0x4a, 0x42, 0xc2,
		0xc0, 0x48, 0x40, 0xc0, 0x84, 0x0c, 0x04, 0x84,
		0x80, 0x08, 0x00, 0x80, 0xc0, 0x48, 0x40, 0xc0,
		0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
		0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
		0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
		0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
		0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
		0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
		0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
		0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
		0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
		0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
	};
	int i;
	u8 c, err = 0;

	for (i = 0; i < 2 * 13; i += 2) {
		err |= biphase_tbl[p[i]] | biphase_tbl[p[i + 1]];
		c = (biphase_tbl[p[i + 1]] & 0xf) | ((biphase_tbl[p[i]] & 0xf) << 4);
		dst[i / 2] = c;
	}
	return err & 0xf0;
}

static int saa711x_decode_wss(u8 *p)
{
	static const int wss_bits[8] = {
		0, 0, 0, 1, 0, 1, 1, 1
	};
	unsigned char parity;
	int wss = 0;
	int i;

	for (i = 0; i < 16; i++) {
		int b1 = wss_bits[p[i] & 7];
		int b2 = wss_bits[(p[i] >> 3) & 7];

		if (b1 == b2)
			return -1;
		wss |= b2 << i;
	}
	parity = wss & 15;
	parity ^= parity >> 2;
	parity ^= parity >> 1;

	if (!(parity & 1))
		return -1;

	return wss;
}

static int saa711x_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
{
	struct saa711x_state *state = to_state(sd);
	u32 acpf;
	u32 acni;
	u32 hz;
	u64 f;
	u8 acc = 0; 	/* reg 0x3a, audio clock control */

	/* Checks for chips that don't have audio clock (saa7111, saa7113) */
	if (!saa711x_has_reg(state->ident, R_30_AUD_MAST_CLK_CYCLES_PER_FIELD))
		return 0;

	v4l2_dbg(1, debug, sd, "set audio clock freq: %d\n", freq);

	/* sanity check */
	if (freq < 32000 || freq > 48000)
		return -EINVAL;

	/* hz is the refresh rate times 100 */
	hz = (state->std & V4L2_STD_525_60) ? 5994 : 5000;
	/* acpf = (256 * freq) / field_frequency == (256 * 100 * freq) / hz */
	acpf = (25600 * freq) / hz;
	/* acni = (256 * freq * 2^23) / crystal_frequency =
		  (freq * 2^(8+23)) / crystal_frequency =
		  (freq << 31) / crystal_frequency */
	f = freq;
	f = f << 31;
	do_div(f, state->crystal_freq);
	acni = f;
	if (state->ucgc) {
		acpf = acpf * state->cgcdiv / 16;
		acni = acni * state->cgcdiv / 16;
		acc = 0x80;
		if (state->cgcdiv == 3)
			acc |= 0x40;
	}
	if (state->apll)
		acc |= 0x08;

	if (state->double_asclk) {
		acpf <<= 1;
		acni <<= 1;
	}
	saa711x_write(sd, R_38_CLK_RATIO_AMXCLK_TO_ASCLK, 0x03);
	saa711x_write(sd, R_39_CLK_RATIO_ASCLK_TO_ALRCLK, 0x10 << state->double_asclk);
	saa711x_write(sd, R_3A_AUD_CLK_GEN_BASIC_SETUP, acc);

	saa711x_write(sd, R_30_AUD_MAST_CLK_CYCLES_PER_FIELD, acpf & 0xff);
	saa711x_write(sd, R_30_AUD_MAST_CLK_CYCLES_PER_FIELD+1,
							(acpf >> 8) & 0xff);
	saa711x_write(sd, R_30_AUD_MAST_CLK_CYCLES_PER_FIELD+2,
							(acpf >> 16) & 0x03);

	saa711x_write(sd, R_34_AUD_MAST_CLK_NOMINAL_INC, acni & 0xff);
	saa711x_write(sd, R_34_AUD_MAST_CLK_NOMINAL_INC+1, (acni >> 8) & 0xff);
	saa711x_write(sd, R_34_AUD_MAST_CLK_NOMINAL_INC+2, (acni >> 16) & 0x3f);
	state->audclk_freq = freq;
	return 0;
}

static int saa711x_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
	struct v4l2_subdev *sd = to_sd(ctrl);
	struct saa711x_state *state = to_state(sd);

	switch (ctrl->id) {
	case V4L2_CID_CHROMA_AGC:
		/* chroma gain cluster */
		if (state->agc->val)
			state->gain->val =
				saa711x_read(sd, R_0F_CHROMA_GAIN_CNTL) & 0x7f;
		break;
	}
	return 0;
}

static int saa711x_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct v4l2_subdev *sd = to_sd(ctrl);
	struct saa711x_state *state = to_state(sd);

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
		saa711x_write(sd, R_0A_LUMA_BRIGHT_CNTL, ctrl->val);
		break;

	case V4L2_CID_CONTRAST:
		saa711x_write(sd, R_0B_LUMA_CONTRAST_CNTL, ctrl->val);
		break;

	case V4L2_CID_SATURATION:
		saa711x_write(sd, R_0C_CHROMA_SAT_CNTL, ctrl->val);
		break;

	case V4L2_CID_HUE:
		saa711x_write(sd, R_0D_CHROMA_HUE_CNTL, ctrl->val);
		break;

	case V4L2_CID_CHROMA_AGC:
		/* chroma gain cluster */
		if (state->agc->val)
			saa711x_write(sd, R_0F_CHROMA_GAIN_CNTL, state->gain->val);
		else
			saa711x_write(sd, R_0F_CHROMA_GAIN_CNTL, state->gain->val | 0x80);
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static int saa711x_set_size(struct v4l2_subdev *sd, int width, int height)
{
	struct saa711x_state *state = to_state(sd);
	int HPSC, HFSC;
	int VSCY;
	int res;
	int is_50hz = state->std & V4L2_STD_625_50;
	int Vsrc = is_50hz ? 576 : 480;

	v4l2_dbg(1, debug, sd, "decoder set size to %ix%i\n", width, height);

	/* FIXME need better bounds checking here */
	if ((width < 1) || (width > 1440))
		return -EINVAL;
	if ((height < 1) || (height > Vsrc))
		return -EINVAL;

	if (!saa711x_has_reg(state->ident, R_D0_B_HORIZ_PRESCALING)) {
		/* Decoder only supports 720 columns and 480 or 576 lines */
		if (width != 720)
			return -EINVAL;
		if (height != Vsrc)
			return -EINVAL;
	}

	state->width = width;
	state->height = height;

	if (!saa711x_has_reg(state->ident, R_CC_B_HORIZ_OUTPUT_WINDOW_LENGTH))
		return 0;

	/* probably have a valid size, let's set it */
	/* Set output width/height */
	/* width */

	saa711x_write(sd, R_CC_B_HORIZ_OUTPUT_WINDOW_LENGTH,
					(u8) (width & 0xff));
	saa711x_write(sd, R_CD_B_HORIZ_OUTPUT_WINDOW_LENGTH_MSB,
					(u8) ((width >> 8) & 0xff));

	/* Vertical Scaling uses height/2 */
	res = height / 2;

	/* On 60Hz, it is using a higher Vertical Output Size */
	if (!is_50hz)
		res += (VRES_60HZ - 480) >> 1;

		/* height */
	saa711x_write(sd, R_CE_B_VERT_OUTPUT_WINDOW_LENGTH,
					(u8) (res & 0xff));
	saa711x_write(sd, R_CF_B_VERT_OUTPUT_WINDOW_LENGTH_MSB,
					(u8) ((res >> 8) & 0xff));

	/* Scaling settings */
	/* Hprescaler is floor(inres/outres) */
	HPSC = (int)(720 / width);
	/* 0 is not allowed (div. by zero) */
	HPSC = HPSC ? HPSC : 1;
	HFSC = (int)((1024 * 720) / (HPSC * width));
	/* FIXME hardcodes to "Task B"
	 * write H prescaler integer */
	saa711x_write(sd, R_D0_B_HORIZ_PRESCALING,
				(u8) (HPSC & 0x3f));

	v4l2_dbg(1, debug, sd, "Hpsc: 0x%05x, Hfsc: 0x%05x\n", HPSC, HFSC);
	/* write H fine-scaling (luminance) */
	saa711x_write(sd, R_D8_B_HORIZ_LUMA_SCALING_INC,
				(u8) (HFSC & 0xff));
	saa711x_write(sd, R_D9_B_HORIZ_LUMA_SCALING_INC_MSB,
				(u8) ((HFSC >> 8) & 0xff));
	/* write H fine-scaling (chrominance)
	 * must be lum/2, so i'll just bitshift :) */
	saa711x_write(sd, R_DC_B_HORIZ_CHROMA_SCALING,
				(u8) ((HFSC >> 1) & 0xff));
	saa711x_write(sd, R_DD_B_HORIZ_CHROMA_SCALING_MSB,
				(u8) ((HFSC >> 9) & 0xff));

	VSCY = (int)((1024 * Vsrc) / height);
	v4l2_dbg(1, debug, sd, "Vsrc: %d, Vscy: 0x%05x\n", Vsrc, VSCY);

	/* Correct Contrast and Luminance */
	saa711x_write(sd, R_D5_B_LUMA_CONTRAST_CNTL,
					(u8) (64 * 1024 / VSCY));
	saa711x_write(sd, R_D6_B_CHROMA_SATURATION_CNTL,
					(u8) (64 * 1024 / VSCY));

		/* write V fine-scaling (luminance) */
	saa711x_write(sd, R_E0_B_VERT_LUMA_SCALING_INC,
					(u8) (VSCY & 0xff));
	saa711x_write(sd, R_E1_B_VERT_LUMA_SCALING_INC_MSB,
					(u8) ((VSCY >> 8) & 0xff));
		/* write V fine-scaling (chrominance) */
	saa711x_write(sd, R_E2_B_VERT_CHROMA_SCALING_INC,
					(u8) (VSCY & 0xff));
	saa711x_write(sd, R_E3_B_VERT_CHROMA_SCALING_INC_MSB,
					(u8) ((VSCY >> 8) & 0xff));

	saa711x_writeregs(sd, saa7115_cfg_reset_scaler);

	/* Activates task "B" */
	saa711x_write(sd, R_80_GLOBAL_CNTL_1,
				saa711x_read(sd, R_80_GLOBAL_CNTL_1) | 0x20);

	return 0;
}

static void saa711x_set_v4lstd(struct v4l2_subdev *sd, v4l2_std_id std)
{
	struct saa711x_state *state = to_state(sd);

	/* Prevent unnecessary standard changes. During a standard
	   change the I-Port is temporarily disabled. Any devices
	   reading from that port can get confused.
	   Note that s_std is also used to switch from
	   radio to TV mode, so if a s_std is broadcast to
	   all I2C devices then you do not want to have an unwanted
	   side-effect here. */
	if (std == state->std)
		return;

	state->std = std;

	// This works for NTSC-M, SECAM-L and the 50Hz PAL variants.
	if (std & V4L2_STD_525_60) {
		v4l2_dbg(1, debug, sd, "decoder set standard 60 Hz\n");
		if (state->ident == GM7113C) {
			u8 reg = saa711x_read(sd, R_08_SYNC_CNTL);
			reg &= ~(SAA7113_R_08_FSEL | SAA7113_R_08_AUFD);
			reg |= SAA7113_R_08_FSEL;
			saa711x_write(sd, R_08_SYNC_CNTL, reg);
		} else {
			saa711x_writeregs(sd, saa7115_cfg_60hz_video);
		}
		saa711x_set_size(sd, 720, 480);
	} else {
		v4l2_dbg(1, debug, sd, "decoder set standard 50 Hz\n");
		if (state->ident == GM7113C) {
			u8 reg = saa711x_read(sd, R_08_SYNC_CNTL);
			reg &= ~(SAA7113_R_08_FSEL | SAA7113_R_08_AUFD);
			saa711x_write(sd, R_08_SYNC_CNTL, reg);
		} else {
			saa711x_writeregs(sd, saa7115_cfg_50hz_video);
		}
		saa711x_set_size(sd, 720, 576);
	}

	/* Register 0E - Bits D6-D4 on NO-AUTO mode
		(SAA7111 and SAA7113 doesn't have auto mode)
	    50 Hz / 625 lines           60 Hz / 525 lines
	000 PAL BGDHI (4.43Mhz)         NTSC M (3.58MHz)
	001 NTSC 4.43 (50 Hz)           PAL 4.43 (60 Hz)
	010 Combination-PAL N (3.58MHz) NTSC 4.43 (60 Hz)
	011 NTSC N (3.58MHz)            PAL M (3.58MHz)
	100 reserved                    NTSC-Japan (3.58MHz)
	*/
	if (state->ident <= SAA7113 ||
	    state->ident == GM7113C) {
		u8 reg = saa711x_read(sd, R_0E_CHROMA_CNTL_1) & 0x8f;

		if (std == V4L2_STD_PAL_M) {
			reg |= 0x30;
		} else if (std == V4L2_STD_PAL_Nc) {
			reg |= 0x20;
		} else if (std == V4L2_STD_PAL_60) {
			reg |= 0x10;
		} else if (std == V4L2_STD_NTSC_M_JP) {
			reg |= 0x40;
		} else if (std & V4L2_STD_SECAM) {