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linux-next/drivers/media/tuners/fc0013.c
Mauro Carvalho Chehab a3f90c75b8 media: dvb: convert tuner_info frequencies to Hz 
Right now, satellite tuner drivers specify frequencies in kHz,
while terrestrial/cable ones specify in Hz. That's confusing
for developers.

However, the main problem is that universal tuners capable
of handling both satellite and non-satelite delivery systems
are appearing. We end by needing to hack the drivers in
order to support such hybrid tuners.

So, convert everything to specify tuner frequencies in Hz.

Plese notice that a similar patch is also needed for frontends.

Tested-by: Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>
Acked-by: Michael Büsch <m@bues.ch>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-08-02 16:14:50 -04:00

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/*
* Fitipower FC0013 tuner driver
*
* Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@gmx.net>
* partially based on driver code from Fitipower
* Copyright (C) 2010 Fitipower Integrated Technology Inc
*
* 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 "fc0013.h"
#include "fc0013-priv.h"
static int fc0013_writereg(struct fc0013_priv *priv, u8 reg, u8 val)
{
u8 buf[2] = {reg, val};
struct i2c_msg msg = {
.addr = priv->addr, .flags = 0, .buf = buf, .len = 2
};
if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
err("I2C write reg failed, reg: %02x, val: %02x", reg, val);
return -EREMOTEIO;
}
return 0;
}
static int fc0013_readreg(struct fc0013_priv *priv, u8 reg, u8 *val)
{
struct i2c_msg msg[2] = {
{ .addr = priv->addr, .flags = 0, .buf = &reg, .len = 1 },
{ .addr = priv->addr, .flags = I2C_M_RD, .buf = val, .len = 1 },
};
if (i2c_transfer(priv->i2c, msg, 2) != 2) {
err("I2C read reg failed, reg: %02x", reg);
return -EREMOTEIO;
}
return 0;
}
static void fc0013_release(struct dvb_frontend *fe)
{
kfree(fe->tuner_priv);
fe->tuner_priv = NULL;
}
static int fc0013_init(struct dvb_frontend *fe)
{
struct fc0013_priv *priv = fe->tuner_priv;
int i, ret = 0;
unsigned char reg[] = {
0x00, /* reg. 0x00: dummy */
0x09, /* reg. 0x01 */
0x16, /* reg. 0x02 */
0x00, /* reg. 0x03 */
0x00, /* reg. 0x04 */
0x17, /* reg. 0x05 */
0x02, /* reg. 0x06 */
0x0a, /* reg. 0x07: CHECK */
0xff, /* reg. 0x08: AGC Clock divide by 256, AGC gain 1/256,
Loop Bw 1/8 */
0x6f, /* reg. 0x09: enable LoopThrough */
0xb8, /* reg. 0x0a: Disable LO Test Buffer */
0x82, /* reg. 0x0b: CHECK */
0xfc, /* reg. 0x0c: depending on AGC Up-Down mode, may need 0xf8 */
0x01, /* reg. 0x0d: AGC Not Forcing & LNA Forcing, may need 0x02 */
0x00, /* reg. 0x0e */
0x00, /* reg. 0x0f */
0x00, /* reg. 0x10 */
0x00, /* reg. 0x11 */
0x00, /* reg. 0x12 */
0x00, /* reg. 0x13 */
0x50, /* reg. 0x14: DVB-t High Gain, UHF.
Middle Gain: 0x48, Low Gain: 0x40 */
0x01, /* reg. 0x15 */
};
switch (priv->xtal_freq) {
case FC_XTAL_27_MHZ:
case FC_XTAL_28_8_MHZ:
reg[0x07] |= 0x20;
break;
case FC_XTAL_36_MHZ:
default:
break;
}
if (priv->dual_master)
reg[0x0c] |= 0x02;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
for (i = 1; i < sizeof(reg); i++) {
ret = fc0013_writereg(priv, i, reg[i]);
if (ret)
break;
}
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
if (ret)
err("fc0013_writereg failed: %d", ret);
return ret;
}
static int fc0013_sleep(struct dvb_frontend *fe)
{
/* nothing to do here */
return 0;
}
int fc0013_rc_cal_add(struct dvb_frontend *fe, int rc_val)
{
struct fc0013_priv *priv = fe->tuner_priv;
int ret;
u8 rc_cal;
int val;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
/* push rc_cal value, get rc_cal value */
ret = fc0013_writereg(priv, 0x10, 0x00);
if (ret)
goto error_out;
/* get rc_cal value */
ret = fc0013_readreg(priv, 0x10, &rc_cal);
if (ret)
goto error_out;
rc_cal &= 0x0f;
val = (int)rc_cal + rc_val;
/* forcing rc_cal */
ret = fc0013_writereg(priv, 0x0d, 0x11);
if (ret)
goto error_out;
/* modify rc_cal value */
if (val > 15)
ret = fc0013_writereg(priv, 0x10, 0x0f);
else if (val < 0)
ret = fc0013_writereg(priv, 0x10, 0x00);
else
ret = fc0013_writereg(priv, 0x10, (u8)val);
error_out:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
return ret;
}
EXPORT_SYMBOL(fc0013_rc_cal_add);
int fc0013_rc_cal_reset(struct dvb_frontend *fe)
{
struct fc0013_priv *priv = fe->tuner_priv;
int ret;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
ret = fc0013_writereg(priv, 0x0d, 0x01);
if (!ret)
ret = fc0013_writereg(priv, 0x10, 0x00);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
return ret;
}
EXPORT_SYMBOL(fc0013_rc_cal_reset);
static int fc0013_set_vhf_track(struct fc0013_priv *priv, u32 freq)
{
int ret;
u8 tmp;
ret = fc0013_readreg(priv, 0x1d, &tmp);
if (ret)
goto error_out;
tmp &= 0xe3;
if (freq <= 177500) { /* VHF Track: 7 */
ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c);
} else if (freq <= 184500) { /* VHF Track: 6 */
ret = fc0013_writereg(priv, 0x1d, tmp | 0x18);
} else if (freq <= 191500) { /* VHF Track: 5 */
ret = fc0013_writereg(priv, 0x1d, tmp | 0x14);
} else if (freq <= 198500) { /* VHF Track: 4 */
ret = fc0013_writereg(priv, 0x1d, tmp | 0x10);
} else if (freq <= 205500) { /* VHF Track: 3 */
ret = fc0013_writereg(priv, 0x1d, tmp | 0x0c);
} else if (freq <= 219500) { /* VHF Track: 2 */
ret = fc0013_writereg(priv, 0x1d, tmp | 0x08);
} else if (freq < 300000) { /* VHF Track: 1 */
ret = fc0013_writereg(priv, 0x1d, tmp | 0x04);
} else { /* UHF and GPS */
ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c);
}
error_out:
return ret;
}
static int fc0013_set_params(struct dvb_frontend *fe)
{
struct fc0013_priv *priv = fe->tuner_priv;
int i, ret = 0;
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
u32 freq = p->frequency / 1000;
u32 delsys = p->delivery_system;
unsigned char reg[7], am, pm, multi, tmp;
unsigned long f_vco;
unsigned short xtal_freq_khz_2, xin, xdiv;
bool vco_select = false;
if (fe->callback) {
ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
FC_FE_CALLBACK_VHF_ENABLE, (freq > 300000 ? 0 : 1));
if (ret)
goto exit;
}
switch (priv->xtal_freq) {
case FC_XTAL_27_MHZ:
xtal_freq_khz_2 = 27000 / 2;
break;
case FC_XTAL_36_MHZ:
xtal_freq_khz_2 = 36000 / 2;
break;
case FC_XTAL_28_8_MHZ:
default:
xtal_freq_khz_2 = 28800 / 2;
break;
}
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
/* set VHF track */
ret = fc0013_set_vhf_track(priv, freq);
if (ret)
goto exit;
if (freq < 300000) {
/* enable VHF filter */
ret = fc0013_readreg(priv, 0x07, &tmp);
if (ret)
goto exit;
ret = fc0013_writereg(priv, 0x07, tmp | 0x10);
if (ret)
goto exit;
/* disable UHF & disable GPS */
ret = fc0013_readreg(priv, 0x14, &tmp);
if (ret)
goto exit;
ret = fc0013_writereg(priv, 0x14, tmp & 0x1f);
if (ret)
goto exit;
} else if (freq <= 862000) {
/* disable VHF filter */
ret = fc0013_readreg(priv, 0x07, &tmp);
if (ret)
goto exit;
ret = fc0013_writereg(priv, 0x07, tmp & 0xef);
if (ret)
goto exit;
/* enable UHF & disable GPS */
ret = fc0013_readreg(priv, 0x14, &tmp);
if (ret)
goto exit;
ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x40);
if (ret)
goto exit;
} else {
/* disable VHF filter */
ret = fc0013_readreg(priv, 0x07, &tmp);
if (ret)
goto exit;
ret = fc0013_writereg(priv, 0x07, tmp & 0xef);
if (ret)
goto exit;
/* disable UHF & enable GPS */
ret = fc0013_readreg(priv, 0x14, &tmp);
if (ret)
goto exit;
ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x20);
if (ret)
goto exit;
}
/* select frequency divider and the frequency of VCO */
if (freq < 37084) { /* freq * 96 < 3560000 */
multi = 96;
reg[5] = 0x82;
reg[6] = 0x00;
} else if (freq < 55625) { /* freq * 64 < 3560000 */
multi = 64;
reg[5] = 0x02;
reg[6] = 0x02;
} else if (freq < 74167) { /* freq * 48 < 3560000 */
multi = 48;
reg[5] = 0x42;
reg[6] = 0x00;
} else if (freq < 111250) { /* freq * 32 < 3560000 */
multi = 32;
reg[5] = 0x82;
reg[6] = 0x02;
} else if (freq < 148334) { /* freq * 24 < 3560000 */
multi = 24;
reg[5] = 0x22;
reg[6] = 0x00;
} else if (freq < 222500) { /* freq * 16 < 3560000 */
multi = 16;
reg[5] = 0x42;
reg[6] = 0x02;
} else if (freq < 296667) { /* freq * 12 < 3560000 */
multi = 12;
reg[5] = 0x12;
reg[6] = 0x00;
} else if (freq < 445000) { /* freq * 8 < 3560000 */
multi = 8;
reg[5] = 0x22;
reg[6] = 0x02;
} else if (freq < 593334) { /* freq * 6 < 3560000 */
multi = 6;
reg[5] = 0x0a;
reg[6] = 0x00;
} else if (freq < 950000) { /* freq * 4 < 3800000 */
multi = 4;
reg[5] = 0x12;
reg[6] = 0x02;
} else {
multi = 2;
reg[5] = 0x0a;
reg[6] = 0x02;
}
f_vco = freq * multi;
if (f_vco >= 3060000) {
reg[6] |= 0x08;
vco_select = true;
}
if (freq >= 45000) {
/* From divided value (XDIV) determined the FA and FP value */
xdiv = (unsigned short)(f_vco / xtal_freq_khz_2);
if ((f_vco - xdiv * xtal_freq_khz_2) >= (xtal_freq_khz_2 / 2))
xdiv++;
pm = (unsigned char)(xdiv / 8);
am = (unsigned char)(xdiv - (8 * pm));
if (am < 2) {
reg[1] = am + 8;
reg[2] = pm - 1;
} else {
reg[1] = am;
reg[2] = pm;
}
} else {
/* fix for frequency less than 45 MHz */
reg[1] = 0x06;
reg[2] = 0x11;
}
/* fix clock out */
reg[6] |= 0x20;
/* From VCO frequency determines the XIN ( fractional part of Delta
Sigma PLL) and divided value (XDIV) */
xin = (unsigned short)(f_vco - (f_vco / xtal_freq_khz_2) * xtal_freq_khz_2);
xin = (xin << 15) / xtal_freq_khz_2;
if (xin >= 16384)
xin += 32768;
reg[3] = xin >> 8;
reg[4] = xin & 0xff;
if (delsys == SYS_DVBT) {
reg[6] &= 0x3f; /* bits 6 and 7 describe the bandwidth */
switch (p->bandwidth_hz) {
case 6000000:
reg[6] |= 0x80;
break;
case 7000000:
reg[6] |= 0x40;
break;
case 8000000:
default:
break;
}
} else {
err("%s: modulation type not supported!", __func__);
return -EINVAL;
}
/* modified for Realtek demod */
reg[5] |= 0x07;
for (i = 1; i <= 6; i++) {
ret = fc0013_writereg(priv, i, reg[i]);
if (ret)
goto exit;
}
ret = fc0013_readreg(priv, 0x11, &tmp);
if (ret)
goto exit;
if (multi == 64)
ret = fc0013_writereg(priv, 0x11, tmp | 0x04);
else
ret = fc0013_writereg(priv, 0x11, tmp & 0xfb);
if (ret)
goto exit;
/* VCO Calibration */
ret = fc0013_writereg(priv, 0x0e, 0x80);
if (!ret)
ret = fc0013_writereg(priv, 0x0e, 0x00);
/* VCO Re-Calibration if needed */
if (!ret)
ret = fc0013_writereg(priv, 0x0e, 0x00);
if (!ret) {
msleep(10);
ret = fc0013_readreg(priv, 0x0e, &tmp);
}
if (ret)
goto exit;
/* vco selection */
tmp &= 0x3f;
if (vco_select) {
if (tmp > 0x3c) {
reg[6] &= ~0x08;
ret = fc0013_writereg(priv, 0x06, reg[6]);
if (!ret)
ret = fc0013_writereg(priv, 0x0e, 0x80);
if (!ret)
ret = fc0013_writereg(priv, 0x0e, 0x00);
}
} else {
if (tmp < 0x02) {
reg[6] |= 0x08;
ret = fc0013_writereg(priv, 0x06, reg[6]);
if (!ret)
ret = fc0013_writereg(priv, 0x0e, 0x80);
if (!ret)
ret = fc0013_writereg(priv, 0x0e, 0x00);
}
}
priv->frequency = p->frequency;
priv->bandwidth = p->bandwidth_hz;
exit:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
if (ret)
warn("%s: failed: %d", __func__, ret);
return ret;
}
static int fc0013_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct fc0013_priv *priv = fe->tuner_priv;
*frequency = priv->frequency;
return 0;
}
static int fc0013_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
{
/* always ? */
*frequency = 0;
return 0;
}
static int fc0013_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
struct fc0013_priv *priv = fe->tuner_priv;
*bandwidth = priv->bandwidth;
return 0;
}
#define INPUT_ADC_LEVEL -8
static int fc0013_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
{
struct fc0013_priv *priv = fe->tuner_priv;
int ret;
unsigned char tmp;
int int_temp, lna_gain, int_lna, tot_agc_gain, power;
static const int fc0013_lna_gain_table[] = {
/* low gain */
-63, -58, -99, -73,
-63, -65, -54, -60,
/* middle gain */
71, 70, 68, 67,
65, 63, 61, 58,
/* high gain */
197, 191, 188, 186,
184, 182, 181, 179,
};
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
ret = fc0013_writereg(priv, 0x13, 0x00);
if (ret)
goto err;
ret = fc0013_readreg(priv, 0x13, &tmp);
if (ret)
goto err;
int_temp = tmp;
ret = fc0013_readreg(priv, 0x14, &tmp);
if (ret)
goto err;
lna_gain = tmp & 0x1f;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
if (lna_gain < ARRAY_SIZE(fc0013_lna_gain_table)) {
int_lna = fc0013_lna_gain_table[lna_gain];
tot_agc_gain = (abs((int_temp >> 5) - 7) - 2 +
(int_temp & 0x1f)) * 2;
power = INPUT_ADC_LEVEL - tot_agc_gain - int_lna / 10;
if (power >= 45)
*strength = 255; /* 100% */
else if (power < -95)
*strength = 0;
else
*strength = (power + 95) * 255 / 140;
*strength |= *strength << 8;
} else {
ret = -1;
}
goto exit;
err:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
exit:
if (ret)
warn("%s: failed: %d", __func__, ret);
return ret;
}
static const struct dvb_tuner_ops fc0013_tuner_ops = {
.info = {
.name = "Fitipower FC0013",
.frequency_min_hz = 37 * MHz, /* estimate */
.frequency_max_hz = 1680 * MHz, /* CHECK */
},
.release = fc0013_release,
.init = fc0013_init,
.sleep = fc0013_sleep,
.set_params = fc0013_set_params,
.get_frequency = fc0013_get_frequency,
.get_if_frequency = fc0013_get_if_frequency,
.get_bandwidth = fc0013_get_bandwidth,
.get_rf_strength = fc0013_get_rf_strength,
};
struct dvb_frontend *fc0013_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c, u8 i2c_address, int dual_master,
enum fc001x_xtal_freq xtal_freq)
{
struct fc0013_priv *priv = NULL;
priv = kzalloc(sizeof(struct fc0013_priv), GFP_KERNEL);
if (priv == NULL)
return NULL;
priv->i2c = i2c;
priv->dual_master = dual_master;
priv->addr = i2c_address;
priv->xtal_freq = xtal_freq;
info("Fitipower FC0013 successfully attached.");
fe->tuner_priv = priv;
memcpy(&fe->ops.tuner_ops, &fc0013_tuner_ops,
sizeof(struct dvb_tuner_ops));
return fe;
}
EXPORT_SYMBOL(fc0013_attach);
MODULE_DESCRIPTION("Fitipower FC0013 silicon tuner driver");
MODULE_AUTHOR("Hans-Frieder Vogt <hfvogt@gmx.net>");
MODULE_LICENSE("GPL");
MODULE_VERSION("0.2");
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