/*
* NXP TDA18250 silicon tuner driver
*
* Copyright (C) 2017 Olli Salonen <olli.salonen@iki.fi>
*
* 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 "tda18250_priv.h"
#include <linux/regmap.h>
static const struct dvb_tuner_ops tda18250_ops;
static int tda18250_power_control(struct dvb_frontend *fe,
unsigned int power_state)
{
struct i2c_client *client = fe->tuner_priv;
struct tda18250_dev *dev = i2c_get_clientdata(client);
int ret;
unsigned int utmp;
dev_dbg(&client->dev, "power state: %d", power_state);
switch (power_state) {
case TDA18250_POWER_NORMAL:
ret = regmap_write_bits(dev->regmap, R06_POWER2, 0x07, 0x00);
if (ret)
goto err;
ret = regmap_write_bits(dev->regmap, R25_REF, 0xc0, 0xc0);
if (ret)
goto err;
break;
case TDA18250_POWER_STANDBY:
if (dev->loopthrough) {
ret = regmap_write_bits(dev->regmap,
R25_REF, 0xc0, 0x80);
if (ret)
goto err;
ret = regmap_write_bits(dev->regmap,
R06_POWER2, 0x07, 0x02);
if (ret)
goto err;
ret = regmap_write_bits(dev->regmap,
R10_LT1, 0x80, 0x00);
if (ret)
goto err;
} else {
ret = regmap_write_bits(dev->regmap,
R25_REF, 0xc0, 0x80);
if (ret)
goto err;
ret = regmap_write_bits(dev->regmap,
R06_POWER2, 0x07, 0x01);
if (ret)
goto err;
ret = regmap_read(dev->regmap,
R0D_AGC12, &utmp);
if (ret)
goto err;
ret = regmap_write_bits(dev->regmap,
R0D_AGC12, 0x03, 0x03);
if (ret)
goto err;
ret = regmap_write_bits(dev->regmap,
R10_LT1, 0x80, 0x80);
if (ret)
goto err;
ret = regmap_write_bits(dev->regmap,
R0D_AGC12, 0x03, utmp & 0x03);
if (ret)
goto err;
}
break;
default:
ret = -EINVAL;
goto err;
}
return 0;
err:
return ret;
}
static int tda18250_wait_for_irq(struct dvb_frontend *fe,
int maxwait, int step, u8 irq)
{
struct i2c_client *client = fe->tuner_priv;
struct tda18250_dev *dev = i2c_get_clientdata(client);
int ret;
unsigned long timeout;
bool triggered;
unsigned int utmp;
triggered = false;
timeout = jiffies + msecs_to_jiffies(maxwait);
while (!time_after(jiffies, timeout)) {
// check for the IRQ
ret = regmap_read(dev->regmap, R08_IRQ1, &utmp);
if (ret)
goto err;
if ((utmp & irq) == irq) {
triggered = true;
break;
}
msleep(step);
}
dev_dbg(&client->dev, "waited IRQ (0x%02x) %d ms, triggered: %s", irq,
jiffies_to_msecs(jiffies) -
(jiffies_to_msecs(timeout) - maxwait),
triggered ? "true" : "false");
if (!triggered)
return -ETIMEDOUT;
return 0;
err:
return ret;
}
static int tda18250_init(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->tuner_priv;
struct tda18250_dev *dev = i2c_get_clientdata(client);
int ret, i;
/* default values for various regs */
static const u8 init_regs[][2] = {
{ R0C_AGC11, 0xc7 },
{ R0D_AGC12, 0x5d },
{ R0E_AGC13, 0x40 },
{ R0F_AGC14, 0x0e },
{ R10_LT1, 0x47 },
{ R11_LT2, 0x4e },
{ R12_AGC21, 0x26 },
{ R13_AGC22, 0x60 },
{ R18_AGC32, 0x37 },
{ R19_AGC33, 0x09 },
{ R1A_AGCK, 0x00 },
{ R1E_WI_FI, 0x29 },
{ R1F_RF_BPF, 0x06 },
{ R20_IR_MIX, 0xc6 },
{ R21_IF_AGC