path: root/drivers/media/dvb/frontends/s5h1409.c

/*
    Samsung S5H1409 VSB/QAM demodulator driver

    Copyright (C) 2006 Steven Toth <stoth@linuxtv.org>

    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/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include "dvb_frontend.h"
#include "s5h1409.h"

struct s5h1409_state {

	struct i2c_adapter *i2c;

	/* configuration settings */
	const struct s5h1409_config *config;

	struct dvb_frontend frontend;

	/* previous uncorrected block counter */
	fe_modulation_t current_modulation;

	u32 current_frequency;
	int if_freq;

	u32 is_qam_locked;
	u32 qam_state;
};

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Enable verbose debug messages");

#define dprintk	if (debug) printk

/* Register values to initialise the demod, this will set VSB by default */
static struct init_tab {
	u8	reg;
	u16	data;
} init_tab[] = {
	{ 0x00, 0x0071, },
	{ 0x01, 0x3213, },
	{ 0x09, 0x0025, },
	{ 0x1c, 0x001d, },
	{ 0x1f, 0x002d, },
	{ 0x20, 0x001d, },
	{ 0x22, 0x0022, },
	{ 0x23, 0x0020, },
	{ 0x29, 0x110f, },
	{ 0x2a, 0x10b4, },
	{ 0x2b, 0x10ae, },
	{ 0x2c, 0x0031, },
	{ 0x31, 0x010d, },
	{ 0x32, 0x0100, },
	{ 0x44, 0x0510, },
	{ 0x54, 0x0104, },
	{ 0x58, 0x2222, },
	{ 0x59, 0x1162, },
	{ 0x5a, 0x3211, },
	{ 0x5d, 0x0370, },
	{ 0x5e, 0x0296, },
	{ 0x61, 0x0010, },
	{ 0x63, 0x4a00, },
	{ 0x65, 0x0800, },
	{ 0x71, 0x0003, },
	{ 0x72, 0x0470, },
	{ 0x81, 0x0002, },
	{ 0x82, 0x0600, },
	{ 0x86, 0x0002, },
	{ 0x8a, 0x2c38, },
	{ 0x8b, 0x2a37, },
	{ 0x92, 0x302f, },
	{ 0x93, 0x3332, },
	{ 0x96, 0x000c, },
	{ 0x99, 0x0101, },
	{ 0x9c, 0x2e37, },
	{ 0x9d, 0x2c37, },
	{ 0x9e, 0x2c37, },
	{ 0xab, 0x0100, },
	{ 0xac, 0x1003, },
	{ 0xad, 0x103f, },
	{ 0xe2, 0x0100, },
	{ 0xe3, 0x1000, },
	{ 0x28, 0x1010, },
	{ 0xb1, 0x000e, },
};

/* VSB SNR lookup table */
static struct vsb_snr_tab {
	u16	val;
	u16	data;
} vsb_snr_tab[] = {
	{  924, 300, },
	{  923, 300, },
	{  918, 295, },
	{  915, 290, },
	{  911, 285, },
	{  906, 280, },
	{  901, 275, },
	{  896, 270, },
	{  891, 265, },
	{  885, 260, },
	{  879, 255, },
	{  873, 250, },
	{  864, 245, },
	{  858, 240, },
	{  850, 235, },
	{  841, 230, },
	{  832, 225, },
	{  823, 220, },
	{  812, 215, },
	{  802, 210, },
	{  788, 205, },
	{  778, 200, },
	{  767, 195, },
	{  753, 190, },
	{  740, 185, },
	{  725, 180, },
	{  707, 175, },
	{  689, 170, },
	{  671, 165, },
	{  656, 160, },
	{  637, 155, },
	{  616, 150, },
	{  542, 145, },
	{  519, 140, },
	{  507, 135, },
	{  497, 130, },
	{  492, 125, },
	{  474, 120, },
	{  300, 111, },
	{    0,   0, },
};

/* QAM64 SNR lookup table */
static struct