/*
* Driver for Infineon tua6100 pll.
*
* (c) 2006 Andrew de Quincey
*
* Based on code found in budget-av.c, which has the following:
* Compiled from various sources by Michael Hunold <michael@mihu.de>
*
* CI interface support (c) 2004 Olivier Gournet <ogournet@anevia.com> &
* Andrew de Quincey <adq_dvb@lidskialf.net>
*
* Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
*
* Copyright (C) 1999-2002 Ralph Metzler
* & Marcus Metzler for convergence integrated media GmbH
* 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.
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/dvb/frontend.h>
#include <asm/types.h>
#include "tua6100.h"
struct tua6100_priv {
/* i2c details */
int i2c_address;
struct i2c_adapter *i2c;
u32 frequency;
};
static void tua6100_release(struct dvb_frontend *fe)
{
kfree(fe->tuner_priv);
fe->tuner_priv = NULL;
}
static int tua6100_sleep(struct dvb_frontend *fe)
{
struct tua6100_priv *priv = fe->tuner_priv;
int ret;
u8 reg0[] = { 0x00, 0x00 };
struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 };
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) {
printk("%s: i2c error\n", __func__);
}
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
return (ret == 1) ? 0 : ret;
}
static int tua6100_set_params(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
struct tua6100_priv *priv = fe->tuner_priv;
u32 div;
u32 prediv;
u8 reg0[] = { 0x00, 0x00 };
u8 reg1[] = { 0x01, 0x00, 0x00, 0x00 };
u8 reg2[] = { 0x02, 0x00, 0x00 };
struct i2c_msg msg0 = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 };
struct i2c_msg msg1 = { .addr = priv->i2c_address, .flags = 0, .buf = reg1, .len = 4 };
struct i2c_msg msg2 = { .addr = priv->i2c_address, .flags = 0, .buf = reg2, .len = 3 };
#define _R 4
#define _P 32
#define _ri 4000000
// setup register 0
if (c->frequency < 2000000)
reg0[1] = 0x03;
else
reg0[1] = 0x07;
// setup register 1
if (c->frequency < 1630000)
reg1[1] = 0x2c;
else
reg1[1] = 0x0c;
if (_P == 64)
reg1[1] |= 0x40;
if (c->frequency >= 1525000)
reg1[1] |= 0x80;
// register 2
reg2[1] = (_R >> 8) & 0x03;
reg2[2] = _R;
if (c->frequency < 1455000)
reg2[1] |= 0x1c;
else if (c->frequency < 1630000)
reg2[1] |= 0x0c;
else
reg2[1] |= 0x1c;
/*
* The N divisor ratio (note: c->frequency is in kHz, but we
