// SPDX-License-Identifier: GPL-2.0-or-later
/*
Driver for VES1893 and VES1993 QPSK Demodulators
Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
Copyright (C) 2001 Ronny Strutz <3des@elitedvb.de>
Copyright (C) 2002 Dennis Noermann <dennis.noermann@noernet.de>
Copyright (C) 2002-2003 Andreas Oberritter <obi@linuxtv.org>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <media/dvb_frontend.h>
#include "ves1x93.h"
struct ves1x93_state {
struct i2c_adapter* i2c;
/* configuration settings */
const struct ves1x93_config* config;
struct dvb_frontend frontend;
/* previous uncorrected block counter */
enum fe_spectral_inversion inversion;
u8 *init_1x93_tab;
u8 *init_1x93_wtab;
u8 tab_size;
u8 demod_type;
u32 frequency;
};
static int debug;
#define dprintk if (debug) printk
#define DEMOD_VES1893 0
#define DEMOD_VES1993 1
static u8 init_1893_tab [] = {
0 x01, 0 xa4, 0 x35, 0 x80, 0 x2a, 0 x0b, 0 x55, 0 xc4,
0 x09, 0 x69, 0 x00, 0 x86, 0 x4c, 0 x28, 0 x7f, 0 x00,
0 x00, 0 x81, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00,
0 x80, 0 x00, 0 x21, 0 xb0, 0 x14, 0 x00, 0 xdc, 0 x00,
0 x81, 0 x80, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00,
0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00,
0 x00, 0 x55, 0 x00, 0 x00, 0 x7f, 0 x00
};
static u8 init_1993_tab [] = {
0 x00, 0 x9c, 0 x35, 0 x80, 0 x6a, 0 x09, 0 x72, 0 x8c,
0 x09, 0 x6b, 0 x00, 0 x00, 0 x4c, 0 x08, 0 x00, 0 x00,
0 x00, 0 x81, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00,
0 x80, 0 x40, 0 x21, 0 xb0, 0 x00, 0 x00, 0 x00, 0 x10,
0 x81, 0 x80, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00, 0 x00,
0 x00, 0 x00, 0 x80, 0 x80, 0 x00, 0 x00, 0 x00, 0 x00,
0 x00, 0 x55, 0 x03, 0 x00, 0 x00, 0 x00, 0 x00, 0 x03,
0 x00, 0 x00, 0 x0e, 0 x80, 0 x00
};
static u8 init_1893_wtab[] =
{
1 ,1 ,1 ,1 ,1 ,1 ,1 ,1 , 1 ,1 ,0 ,0 ,1 ,1 ,0 ,0 ,
0 ,1 ,0 ,0 ,0 ,0 ,0 ,0 , 1 ,0 ,1 ,1 ,0 ,0 ,0 ,1 ,
1 ,1 ,1 ,0 ,0 ,0 ,0 ,0 , 0 ,0 ,1 ,1 ,0 ,0 ,0 ,0 ,
1 ,1 ,1 ,0 ,1 ,1
};
static u8 init_1993_wtab[] =
{
1 ,1 ,1 ,1 ,1 ,1 ,1 ,1 , 1 ,1 ,0 ,0 ,1 ,1 ,0 ,0 ,
0 ,1 ,0 ,0 ,0 ,0 ,0 ,0 , 1 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,
1 ,1 ,1 ,0 ,0 ,0 ,0 ,0 , 0 ,0 ,1 ,1 ,0 ,0 ,0 ,0 ,
1 ,1 ,1 ,0 ,1 ,1 ,1 ,1 , 1 ,1 ,1 ,1 ,1
};
static int ves1x93_writereg (struct ves1x93_state* state, u8 reg, u8 data)
{
u8 buf [] = { 0 x00, reg, data };
struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0 , .buf = buf, .len = 3 };
int err;
if ((err = i2c_transfer (state->i2c, &msg, 1 )) != 1 ) {
dprintk ("%s: writereg error (err == %i, reg == 0x%02x, data == 0x%02x)\n" , __func__, err, reg, data);
return -EREMOTEIO;
}
return 0 ;
}
static u8 ves1x93_readreg (struct ves1x93_state* state, u8 reg)
{
int ret;
u8 b0 [] = { 0 x00, reg };
u8 b1 [] = { 0 };
struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0 , .buf = b0, .len = 2 },
{ .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
ret = i2c_transfer (state->i2c, msg, 2 );
if (ret != 2 ) return ret;
return b1[0 ];
}
static int ves1x93_clr_bit (struct ves1x93_state* state)
{
msleep(10 );
ves1x93_writereg (state, 0 , state->init_1x93_tab[0 ] & 0 xfe);
ves1x93_writereg (state, 0 , state->init_1x93_tab[0 ]);
msleep(50 );
return 0 ;
}
static int ves1x93_set_inversion(struct ves1x93_state *state,
enum fe_spectral_inversion inversion)
{
u8 val;
/*
* inversion on/off are interchanged because i and q seem to
* be swapped on the hardware
*/
switch (inversion) {
case INVERSION_OFF:
val = 0 xc0;
break ;
case INVERSION_ON:
val = 0 x80;
break ;
case INVERSION_AUTO:
val = 0 x00;
break ;
default :
return -EINVAL;
}
return ves1x93_writereg (state, 0 x0c, (state->init_1x93_tab[0 x0c] & 0 x3f) | val);
}
static int ves1x93_set_fec(struct ves1x93_state *state, enum fe_code_rate fec)
{
if (fec == FEC_AUTO)
return ves1x93_writereg (state, 0 x0d, 0 x08);
else if (fec < FEC_1_2 || fec > FEC_8_9)
return -EINVAL;
else
return ves1x93_writereg (state, 0 x0d, fec - FEC_1_2);
}
static enum fe_code_rate ves1x93_get_fec(struct ves1x93_state *state)
{
return FEC_1_2 + ((ves1x93_readreg (state, 0 x0d) >> 4 ) & 0 x7);
}
static int ves1x93_set_symbolrate (struct ves1x93_state* state, u32 srate)
{
u32 BDR;
u32 ratio;
u8 ADCONF, FCONF, FNR, AGCR;
u32 BDRI;
u32 tmp;
u32 FIN;
dprintk("%s: srate == %d\n" , __func__, (unsigned int ) srate);
if (srate > state->config->xin/2 )
srate = state->config->xin/2 ;
if (srate < 500000 )
srate = 500000 ;
#define MUL (1 UL<<26 )
FIN = (state->config->xin + 6000 ) >> 4 ;
tmp = srate << 6 ;
ratio = tmp / FIN;
tmp = (tmp % FIN) << 8 ;
ratio = (ratio << 8 ) + tmp / FIN;
tmp = (tmp % FIN) << 8 ;
ratio = (ratio << 8 ) + tmp / FIN;
FNR = 0 xff;
if (ratio < MUL/3 ) FNR = 0 ;
if (ratio < (MUL*11 )/50 ) FNR = 1 ;
if (ratio < MUL/6 ) FNR = 2 ;
if (ratio < MUL/9 ) FNR = 3 ;
if (ratio < MUL/12 ) FNR = 4 ;
if (ratio < (MUL*11 )/200 ) FNR = 5 ;
if (ratio < MUL/24 ) FNR = 6 ;
if (ratio < (MUL*27 )/1000 ) FNR = 7 ;
if (ratio < MUL/48 ) FNR = 8 ;
if (ratio < (MUL*137 )/10000 ) FNR = 9 ;
if (FNR == 0 xff) {
ADCONF = 0 x89;
FCONF = 0 x80;
FNR = 0 ;
} else {
ADCONF = 0 x81;
FCONF = 0 x88 | (FNR >> 1 ) | ((FNR & 0 x01) << 5 );
/*FCONF = 0x80 | ((FNR & 0x01) << 5) | (((FNR > 1) & 0x03) << 3) | ((FNR >> 1) & 0x07);*/
}
BDR = (( (ratio << (FNR >> 1 )) >> 4 ) + 1 ) >> 1 ;
BDRI = ( ((FIN << 8 ) / ((srate << (FNR >> 1 )) >> 2 )) + 1 ) >> 1 ;
dprintk("FNR= %d\n" , FNR);
dprintk("ratio= %08x\n" , (unsigned int ) ratio);
dprintk("BDR= %08x\n" , (unsigned int ) BDR);
dprintk("BDRI= %02x\n" , (unsigned int ) BDRI);
if (BDRI > 0 xff)
BDRI = 0 xff;
ves1x93_writereg (state, 0 x06, 0 xff & BDR);
ves1x93_writereg (state, 0 x07, 0 xff & (BDR >> 8 ));
ves1x93_writereg (state, 0 x08, 0 x0f & (BDR >> 16 ));
ves1x93_writereg (state, 0 x09, BDRI);
ves1x93_writereg (state, 0 x20, ADCONF);
ves1x93_writereg (state, 0 x21, FCONF);
AGCR = state->init_1x93_tab[0 x05];
if (state->config->invert_pwm)
AGCR |= 0 x20;
if (srate < 6000000 )
AGCR |= 0 x80;
else
AGCR &= ~0 x80;
ves1x93_writereg (state, 0 x05, AGCR);
/* ves1993 hates this, will lose lock */
if (state->demod_type != DEMOD_VES1993)
ves1x93_clr_bit (state);
return 0 ;
}
static int ves1x93_init (struct dvb_frontend* fe)
{
struct ves1x93_state* state = fe->demodulator_priv;
int i;
int val;
dprintk("%s: init chip\n" , __func__);
for (i = 0 ; i < state->tab_size; i++) {
if (state->init_1x93_wtab[i]) {
val = state->init_1x93_tab[i];
if (state->config->invert_pwm && (i == 0 x05)) val |= 0 x20; /* invert PWM */
ves1x93_writereg (state, i, val);
}
}
return 0 ;
}
static int ves1x93_set_voltage(struct dvb_frontend *fe,
enum fe_sec_voltage voltage)
{
struct ves1x93_state* state = fe->demodulator_priv;
switch (voltage) {
case SEC_VOLTAGE_13:
return ves1x93_writereg (state, 0 x1f, 0 x20);
case SEC_VOLTAGE_18:
return ves1x93_writereg (state, 0 x1f, 0 x30);
case SEC_VOLTAGE_OFF:
return ves1x93_writereg (state, 0 x1f, 0 x00);
default :
return -EINVAL;
}
}
static int ves1x93_read_status(struct dvb_frontend *fe,
enum fe_status *status)
{
struct ves1x93_state* state = fe->demodulator_priv;
u8 sync = ves1x93_readreg (state, 0 x0e);
/*
* The ves1893 sometimes returns sync values that make no sense,
* because, e.g., the SIGNAL bit is 0, while some of the higher
* bits are 1 (and how can there be a CARRIER w/o a SIGNAL?).
* Tests showed that the VITERBI and SYNC bits are returned
* reliably, while the SIGNAL and CARRIER bits ar sometimes wrong.
* If such a case occurs, we read the value again, until we get a
* valid value.
*/
int maxtry = 10 ; /* just for safety - let's not get stuck here */
while ((sync & 0 x03) != 0 x03 && (sync & 0 x0c) && maxtry--) {
msleep(10 );
sync = ves1x93_readreg (state, 0 x0e);
}
*status = 0 ;
if (sync & 1 )
*status |= FE_HAS_SIGNAL;
if (sync & 2 )
*status |= FE_HAS_CARRIER;
if (sync & 4 )
*status |= FE_HAS_VITERBI;
if (sync & 8 )
*status |= FE_HAS_SYNC;
if ((sync & 0 x1f) == 0 x1f)
*status |= FE_HAS_LOCK;
return 0 ;
}
static int ves1x93_read_ber(struct dvb_frontend* fe, u32* ber)
{
struct ves1x93_state* state = fe->demodulator_priv;
*ber = ves1x93_readreg (state, 0 x15);
*ber |= (ves1x93_readreg (state, 0 x16) << 8 );
*ber |= ((ves1x93_readreg (state, 0 x17) & 0 x0F) << 16 );
*ber *= 10 ;
return 0 ;
}
static int ves1x93_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
struct ves1x93_state* state = fe->demodulator_priv;
u8 signal = ~ves1x93_readreg (state, 0 x0b);
*strength = (signal << 8 ) | signal;
return 0 ;
}
static int ves1x93_read_snr(struct dvb_frontend* fe, u16* snr)
{
struct ves1x93_state* state = fe->demodulator_priv;
u8 _snr = ~ves1x93_readreg (state, 0 x1c);
*snr = (_snr << 8 ) | _snr;
return 0 ;
}
static int ves1x93_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
struct ves1x93_state* state = fe->demodulator_priv;
*ucblocks = ves1x93_readreg (state, 0 x18) & 0 x7f;
if (*ucblocks == 0 x7f)
*ucblocks = 0 xffffffff; /* counter overflow... */
ves1x93_writereg (state, 0 x18, 0 x00); /* reset the counter */
ves1x93_writereg (state, 0 x18, 0 x80); /* dto. */
return 0 ;
}
static int ves1x93_set_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct ves1x93_state* state = fe->demodulator_priv;
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 );
}
ves1x93_set_inversion (state, p->inversion);
ves1x93_set_fec(state, p->fec_inner);
ves1x93_set_symbolrate(state, p->symbol_rate);
state->inversion = p->inversion;
state->frequency = p->frequency;
return 0 ;
}
static int ves1x93_get_frontend(struct dvb_frontend *fe,
struct dtv_frontend_properties *p)
{
struct ves1x93_state* state = fe->demodulator_priv;
int afc;
afc = ((int )((char )(ves1x93_readreg (state, 0 x0a) << 1 )))/2 ;
afc = (afc * (int )(p->symbol_rate/1000 /8 ))/16 ;
p->frequency = state->frequency - afc;
/*
* inversion indicator is only valid
* if auto inversion was used
*/
if (state->inversion == INVERSION_AUTO)
p->inversion = (ves1x93_readreg (state, 0 x0f) & 2 ) ?
INVERSION_OFF : INVERSION_ON;
p->fec_inner = ves1x93_get_fec(state);
/* XXX FIXME: timing offset !! */
return 0 ;
}
static int ves1x93_sleep(struct dvb_frontend* fe)
{
struct ves1x93_state* state = fe->demodulator_priv;
return ves1x93_writereg (state, 0 x00, 0 x08);
}
static void ves1x93_release(struct dvb_frontend* fe)
{
struct ves1x93_state* state = fe->demodulator_priv;
kfree(state);
}
static int ves1x93_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
{
struct ves1x93_state* state = fe->demodulator_priv;
if (enable) {
return ves1x93_writereg(state, 0 x00, 0 x11);
} else {
return ves1x93_writereg(state, 0 x00, 0 x01);
}
}
static const struct dvb_frontend_ops ves1x93_ops;
struct dvb_frontend* ves1x93_attach(const struct ves1x93_config* config,
struct i2c_adapter* i2c)
{
struct ves1x93_state* state = NULL;
u8 identity;
/* allocate memory for the internal state */
state = kzalloc(sizeof (struct ves1x93_state), GFP_KERNEL);
if (state == NULL) goto error;
/* setup the state */
state->config = config;
state->i2c = i2c;
state->inversion = INVERSION_OFF;
/* check if the demod is there + identify it */
identity = ves1x93_readreg(state, 0 x1e);
switch (identity) {
case 0 xdc: /* VES1893A rev1 */
printk("ves1x93: Detected ves1893a rev1\n" );
state->demod_type = DEMOD_VES1893;
state->init_1x93_tab = init_1893_tab;
state->init_1x93_wtab = init_1893_wtab;
state->tab_size = sizeof (init_1893_tab);
break ;
case 0 xdd: /* VES1893A rev2 */
printk("ves1x93: Detected ves1893a rev2\n" );
state->demod_type = DEMOD_VES1893;
state->init_1x93_tab = init_1893_tab;
state->init_1x93_wtab = init_1893_wtab;
state->tab_size = sizeof (init_1893_tab);
break ;
case 0 xde: /* VES1993 */
printk("ves1x93: Detected ves1993\n" );
state->demod_type = DEMOD_VES1993;
state->init_1x93_tab = init_1993_tab;
state->init_1x93_wtab = init_1993_wtab;
state->tab_size = sizeof (init_1993_tab);
break ;
default :
goto error;
}
/* create dvb_frontend */
memcpy(&state->frontend.ops, &ves1x93_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 ves1x93_ops = {
.delsys = { SYS_DVBS },
.info = {
.name = "VLSI VES1x93 DVB-S" ,
.frequency_min_hz = 950 * MHz,
.frequency_max_hz = 2150 * MHz,
.frequency_stepsize_hz = 125 * kHz,
.frequency_tolerance_hz = 29500 * kHz,
.symbol_rate_min = 1000000 ,
.symbol_rate_max = 45000000 ,
/* .symbol_rate_tolerance = ???,*/
.caps = FE_CAN_INVERSION_AUTO |
FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
FE_CAN_QPSK
},
.release = ves1x93_release,
.init = ves1x93_init,
.sleep = ves1x93_sleep,
.i2c_gate_ctrl = ves1x93_i2c_gate_ctrl,
.set_frontend = ves1x93_set_frontend,
.get_frontend = ves1x93_get_frontend,
.read_status = ves1x93_read_status,
.read_ber = ves1x93_read_ber,
.read_signal_strength = ves1x93_read_signal_strength,
.read_snr = ves1x93_read_snr,
.read_ucblocks = ves1x93_read_ucblocks,
.set_voltage = ves1x93_set_voltage,
};
module_param(debug, int , 0644 );
MODULE_DESCRIPTION("VLSI VES1x93 DVB-S Demodulator driver" );
MODULE_AUTHOR("Ralph Metzler" );
MODULE_LICENSE("GPL" );
EXPORT_SYMBOL_GPL(ves1x93_attach);
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