// SPDX-License-Identifier: GPL-2.0-or-later
/*
TDA10021 - Single Chip Cable Channel Receiver driver module
used on the Siemens DVB-C cards
Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
Copyright (C) 2004 Markus Schulz <msc@antzsystem.de>
Support for TDA10021
*/
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <media/dvb_frontend.h>
#include "tda1002x.h"
struct tda10021_state {
struct i2c_adapter* i2c;
/* configuration settings */
const struct tda1002x_config* config;
struct dvb_frontend frontend;
u8 pwm;
u8 reg0;
};
#if 0
#define dprintk(x...) printk(x)
#else
#define dprintk(x...)
#endif
static int verbose;
#define XIN 57840000 UL
#define FIN (XIN >> 4 )
static int tda10021_inittab_size = 0 x40;
static u8 tda10021_inittab[0 x40]=
{
0 x73, 0 x6a, 0 x23, 0 x0a, 0 x02, 0 x37, 0 x77, 0 x1a,
0 x37, 0 x6a, 0 x17, 0 x8a, 0 x1e, 0 x86, 0 x43, 0 x40,
0 xb8, 0 x3f, 0 xa1, 0 x00, 0 xcd, 0 x01, 0 x00, 0 xff,
0 x11, 0 x00, 0 x7c, 0 x31, 0 x30, 0 x20, 0 x00, 0 x00,
0 x02, 0 x00, 0 x00, 0 x7d, 0 x00, 0 x00, 0 x00, 0 x00,
0 x07, 0 x00, 0 x33, 0 x11, 0 x0d, 0 x95, 0 x08, 0 x58,
0 x00, 0 x00, 0 x80, 0 x00, 0 x80, 0 xff, 0 x00, 0 x00,
0 x04, 0 x2d, 0 x2f, 0 xff, 0 x00, 0 x00, 0 x00, 0 x00,
};
static int _tda10021_writereg (struct tda10021_state* state, u8 reg, u8 data)
{
u8 buf[] = { reg, data };
struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0 , .buf = buf, .len = 2 };
int ret;
ret = i2c_transfer (state->i2c, &msg, 1 );
if (ret != 1 )
printk("DVB: TDA10021(%d): %s, writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n" ,
state->frontend.dvb->num, __func__, reg, data, ret);
msleep(10 );
return (ret != 1 ) ? -EREMOTEIO : 0 ;
}
static u8 tda10021_readreg (struct tda10021_state* state, u8 reg)
{
u8 b0 [] = { reg };
u8 b1 [] = { 0 };
struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0 , .buf = b0, .len = 1 },
{ .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
int ret;
ret = i2c_transfer (state->i2c, msg, 2 );
// Don't print an error message if the id is read.
if (ret != 2 && reg != 0 x1a)
printk("DVB: TDA10021: %s: readreg error (ret == %i)\n" ,
__func__, ret);
return b1[0 ];
}
//get access to tuner
static int lock_tuner(struct tda10021_state* state)
{
u8 buf[2 ] = { 0 x0f, tda10021_inittab[0 x0f] | 0 x80 };
struct i2c_msg msg = {.addr=state->config->demod_address, .flags=0 , .buf=buf, .len=2 };
if (i2c_transfer(state->i2c, &msg, 1 ) != 1 )
{
printk("tda10021: lock tuner fails\n" );
return -EREMOTEIO;
}
return 0 ;
}
//release access from tuner
static int unlock_tuner(struct tda10021_state* state)
{
u8 buf[2 ] = { 0 x0f, tda10021_inittab[0 x0f] & 0 x7f };
struct i2c_msg msg_post={.addr=state->config->demod_address, .flags=0 , .buf=buf, .len=2 };
if (i2c_transfer(state->i2c, &msg_post, 1 ) != 1 )
{
printk("tda10021: unlock tuner fails\n" );
return -EREMOTEIO;
}
return 0 ;
}
static int tda10021_setup_reg0(struct tda10021_state *state, u8 reg0,
enum fe_spectral_inversion inversion)
{
reg0 |= state->reg0 & 0 x63;
if ((INVERSION_ON == inversion) ^ (state->config->invert == 0 ))
reg0 &= ~0 x20;
else
reg0 |= 0 x20;
_tda10021_writereg (state, 0 x00, reg0 & 0 xfe);
_tda10021_writereg (state, 0 x00, reg0 | 0 x01);
state->reg0 = reg0;
return 0 ;
}
static int tda10021_set_symbolrate (struct tda10021_state* state, u32 symbolrate)
{
s32 BDR;
s32 BDRI;
s16 SFIL = 0 ;
u16 NDEC = 0 ;
u32 tmp, ratio;
if (symbolrate > XIN / 2 )
symbolrate = XIN / 2 ;
else if (symbolrate < 500000 )
symbolrate = 500000 ;
if (symbolrate < XIN / 16 )
NDEC = 1 ;
if (symbolrate < XIN / 32 )
NDEC = 2 ;
if (symbolrate < XIN / 64 )
NDEC = 3 ;
if (symbolrate < XIN * 10 / 123 )
SFIL = 1 ;
if (symbolrate < XIN * 10 / 160 )
SFIL = 0 ;
if (symbolrate < XIN * 10 / 246 )
SFIL = 1 ;
if (symbolrate < XIN * 10 / 320 )
SFIL = 0 ;
if (symbolrate < XIN * 10 / 492 )
SFIL = 1 ;
if (symbolrate < XIN * 10 / 640 )
SFIL = 0 ;
if (symbolrate < XIN * 10 / 984 )
SFIL = 1 ;
symbolrate <<= NDEC;
ratio = (symbolrate << 4 ) / FIN;
tmp = ((symbolrate << 4 ) % FIN) << 8 ;
ratio = (ratio << 8 ) + tmp / FIN;
tmp = (tmp % FIN) << 8 ;
ratio = (ratio << 8 ) + DIV_ROUND_CLOSEST(tmp, FIN);
BDR = ratio;
BDRI = (((XIN << 5 ) / symbolrate) + 1 ) / 2 ;
if (BDRI > 0 xFF)
BDRI = 0 xFF;
SFIL = (SFIL << 4 ) | tda10021_inittab[0 x0E];
NDEC = (NDEC << 6 ) | tda10021_inittab[0 x03];
_tda10021_writereg (state, 0 x03, NDEC);
_tda10021_writereg (state, 0 x0a, BDR&0 xff);
_tda10021_writereg (state, 0 x0b, (BDR>> 8 )&0 xff);
_tda10021_writereg (state, 0 x0c, (BDR>>16 )&0 x3f);
_tda10021_writereg (state, 0 x0d, BDRI);
_tda10021_writereg (state, 0 x0e, SFIL);
return 0 ;
}
static int tda10021_init (struct dvb_frontend *fe)
{
struct tda10021_state* state = fe->demodulator_priv;
int i;
dprintk("DVB: TDA10021(%d): init chip\n" , fe->adapter->num);
//_tda10021_writereg (fe, 0, 0);
for (i=0 ; i<tda10021_inittab_size; i++)
_tda10021_writereg (state, i, tda10021_inittab[i]);
_tda10021_writereg (state, 0 x34, state->pwm);
//Comment by markus
//0x2A[3-0] == PDIV -> P multiplaying factor (P=PDIV+1)(default 0)
//0x2A[4] == BYPPLL -> Power down mode (default 1)
//0x2A[5] == LCK -> PLL Lock Flag
//0x2A[6] == POLAXIN -> Polarity of the input reference clock (default 0)
//Activate PLL
_tda10021_writereg(state, 0 x2a, tda10021_inittab[0 x2a] & 0 xef);
return 0 ;
}
struct qam_params {
u8 conf, agcref, lthr, mseth, aref;
};
static int tda10021_set_parameters(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
u32 delsys = c->delivery_system;
unsigned qam = c->modulation;
bool is_annex_c;
u32 reg0x3d;
struct tda10021_state* state = fe->demodulator_priv;
static const struct qam_params qam_params[] = {
/* Modulation Conf AGCref LTHR MSETH AREF */
[QPSK] = { 0 x14, 0 x78, 0 x78, 0 x8c, 0 x96 },
[QAM_16] = { 0 x00, 0 x8c, 0 x87, 0 xa2, 0 x91 },
[QAM_32] = { 0 x04, 0 x8c, 0 x64, 0 x74, 0 x96 },
[QAM_64] = { 0 x08, 0 x6a, 0 x46, 0 x43, 0 x6a },
[QAM_128] = { 0 x0c, 0 x78, 0 x36, 0 x34, 0 x7e },
[QAM_256] = { 0 x10, 0 x5c, 0 x26, 0 x23, 0 x6b },
};
switch (delsys) {
case SYS_DVBC_ANNEX_A:
is_annex_c = false ;
break ;
case SYS_DVBC_ANNEX_C:
is_annex_c = true ;
break ;
default :
return -EINVAL;
}
/*
* gcc optimizes the code below the same way as it would code:
* "if (qam > 5) return -EINVAL;"
* Yet, the code is clearer, as it shows what QAM standards are
* supported by the driver, and avoids the usage of magic numbers on
* it.
*/
switch (qam) {
case QPSK:
case QAM_16:
case QAM_32:
case QAM_64:
case QAM_128:
case QAM_256:
break ;
default :
return -EINVAL;
}
if (c->inversion != INVERSION_ON && c->inversion != INVERSION_OFF)
return -EINVAL;
/*printk("tda10021: set frequency to %d qam=%d symrate=%d\n", p->frequency,qam,p->symbol_rate);*/
if (fe->ops.tuner_ops.set_params) {
fe->ops.tuner_ops.set_params(fe);
if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0 );
}
tda10021_set_symbolrate(state, c->symbol_rate);
_tda10021_writereg(state, 0 x34, state->pwm);
_tda10021_writereg(state, 0 x01, qam_params[qam].agcref);
_tda10021_writereg(state, 0 x05, qam_params[qam].lthr);
_tda10021_writereg(state, 0 x08, qam_params[qam].mseth);
_tda10021_writereg(state, 0 x09, qam_params[qam].aref);
/*
* Bit 0 == 0 means roll-off = 0.15 (Annex A)
* == 1 means roll-off = 0.13 (Annex C)
*/
reg0x3d = tda10021_readreg (state, 0 x3d);
if (is_annex_c)
_tda10021_writereg (state, 0 x3d, 0 x01 | reg0x3d);
else
_tda10021_writereg (state, 0 x3d, 0 xfe & reg0x3d);
tda10021_setup_reg0(state, qam_params[qam].conf, c->inversion);
return 0 ;
}
static int tda10021_read_status(struct dvb_frontend *fe,
enum fe_status *status)
{
struct tda10021_state* state = fe->demodulator_priv;
int sync;
*status = 0 ;
//0x11[0] == EQALGO -> Equalizer algorithms state
//0x11[1] == CARLOCK -> Carrier locked
//0x11[2] == FSYNC -> Frame synchronisation
//0x11[3] == FEL -> Front End locked
//0x11[6] == NODVB -> DVB Mode Information
sync = tda10021_readreg (state, 0 x11);
if (sync & 2 )
*status |= FE_HAS_SIGNAL|FE_HAS_CARRIER;
if (sync & 4 )
*status |= FE_HAS_SYNC|FE_HAS_VITERBI;
if (sync & 8 )
*status |= FE_HAS_LOCK;
return 0 ;
}
static int tda10021_read_ber(struct dvb_frontend* fe, u32* ber)
{
struct tda10021_state* state = fe->demodulator_priv;
u32 _ber = tda10021_readreg(state, 0 x14) |
(tda10021_readreg(state, 0 x15) << 8 ) |
((tda10021_readreg(state, 0 x16) & 0 x0f) << 16 );
_tda10021_writereg(state, 0 x10, (tda10021_readreg(state, 0 x10) & ~0 xc0)
| (tda10021_inittab[0 x10] & 0 xc0));
*ber = 10 * _ber;
return 0 ;
}
static int tda10021_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
struct tda10021_state* state = fe->demodulator_priv;
u8 config = tda10021_readreg(state, 0 x02);
u8 gain = tda10021_readreg(state, 0 x17);
if (config & 0 x02)
/* the agc value is inverted */
gain = ~gain;
*strength = (gain << 8 ) | gain;
return 0 ;
}
static int tda10021_read_snr(struct dvb_frontend* fe, u16* snr)
{
struct tda10021_state* state = fe->demodulator_priv;
u8 quality = ~tda10021_readreg(state, 0 x18);
*snr = (quality << 8 ) | quality;
return 0 ;
}
static int tda10021_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
struct tda10021_state* state = fe->demodulator_priv;
*ucblocks = tda10021_readreg (state, 0 x13) & 0 x7f;
if (*ucblocks == 0 x7f)
*ucblocks = 0 xffffffff;
/* reset uncorrected block counter */
_tda10021_writereg (state, 0 x10, tda10021_inittab[0 x10] & 0 xdf);
_tda10021_writereg (state, 0 x10, tda10021_inittab[0 x10]);
return 0 ;
}
static int tda10021_get_frontend(struct dvb_frontend *fe,
struct dtv_frontend_properties *p)
{
struct tda10021_state* state = fe->demodulator_priv;
int sync;
s8 afc = 0 ;
sync = tda10021_readreg(state, 0 x11);
afc = tda10021_readreg(state, 0 x19);
if (verbose) {
/* AFC only valid when carrier has been recovered */
printk(sync & 2 ? "DVB: TDA10021(%d): AFC (%d) %dHz\n" :
"DVB: TDA10021(%d): [AFC (%d) %dHz]\n" ,
state->frontend.dvb->num, afc,
-((s32)p->symbol_rate * afc) >> 10 );
}
p->inversion = ((state->reg0 & 0 x20) == 0 x20) ^ (state->config->invert != 0 ) ? INVERSION_ON : INVERSION_OFF;
p->modulation = ((state->reg0 >> 2 ) & 7 ) + QAM_16;
p->fec_inner = FEC_NONE;
p->frequency = ((p->frequency + 31250 ) / 62500 ) * 62500 ;
if (sync & 2 )
p->frequency -= ((s32)p->symbol_rate * afc) >> 10 ;
return 0 ;
}
static int tda10021_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
{
struct tda10021_state* state = fe->demodulator_priv;
if (enable) {
lock_tuner(state);
} else {
unlock_tuner(state);
}
return 0 ;
}
static int tda10021_sleep(struct dvb_frontend* fe)
{
struct tda10021_state* state = fe->demodulator_priv;
_tda10021_writereg (state, 0 x1b, 0 x02); /* pdown ADC */
_tda10021_writereg (state, 0 x00, 0 x80); /* standby */
return 0 ;
}
static void tda10021_release(struct dvb_frontend* fe)
{
struct tda10021_state* state = fe->demodulator_priv;
kfree(state);
}
static const struct dvb_frontend_ops tda10021_ops;
struct dvb_frontend* tda10021_attach(const struct tda1002x_config* config,
struct i2c_adapter* i2c,
u8 pwm)
{
struct tda10021_state* state = NULL;
u8 id;
/* allocate memory for the internal state */
state = kzalloc(sizeof (struct tda10021_state), GFP_KERNEL);
if (state == NULL) goto error;
/* setup the state */
state->config = config;
state->i2c = i2c;
state->pwm = pwm;
state->reg0 = tda10021_inittab[0 ];
/* check if the demod is there */
id = tda10021_readreg(state, 0 x1a);
if ((id & 0 xf0) != 0 x70) goto error;
/* Don't claim TDA10023 */
if (id == 0 x7d)
goto error;
printk("TDA10021: i2c-addr = 0x%02x, id = 0x%02x\n" ,
state->config->demod_address, id);
/* create dvb_frontend */
memcpy(&state->frontend.ops, &tda10021_ops, sizeof (struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
error:
kfree(state);
return NULL;
}
static const struct dvb_frontend_ops tda10021_ops = {
.delsys = { SYS_DVBC_ANNEX_A, SYS_DVBC_ANNEX_C },
.info = {
.name = "Philips TDA10021 DVB-C" ,
.frequency_min_hz = 47 * MHz,
.frequency_max_hz = 862 * MHz,
.frequency_stepsize_hz = 62500 ,
.symbol_rate_min = (XIN / 2 ) / 64 , /* SACLK/64 == (XIN/2)/64 */
.symbol_rate_max = (XIN / 2 ) / 4 , /* SACLK/4 */
#if 0
.frequency_tolerance = ???,
.symbol_rate_tolerance = ???, /* ppm */ /* == 8% (spec p. 5) */
#endif
.caps = 0 x400 | //FE_CAN_QAM_4
FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
FE_CAN_QAM_128 | FE_CAN_QAM_256 |
FE_CAN_FEC_AUTO
},
.release = tda10021_release,
.init = tda10021_init,
.sleep = tda10021_sleep,
.i2c_gate_ctrl = tda10021_i2c_gate_ctrl,
.set_frontend = tda10021_set_parameters,
.get_frontend = tda10021_get_frontend,
.read_status = tda10021_read_status,
.read_ber = tda10021_read_ber,
.read_signal_strength = tda10021_read_signal_strength,
.read_snr = tda10021_read_snr,
.read_ucblocks = tda10021_read_ucblocks,
};
module_param(verbose, int , 0644 );
MODULE_PARM_DESC(verbose, "print AFC offset after tuning for debugging the PWM setting" );
MODULE_DESCRIPTION("Philips TDA10021 DVB-C demodulator driver" );
MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Markus Schulz" );
MODULE_LICENSE("GPL" );
EXPORT_SYMBOL_GPL(tda10021_attach);
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