// SPDX-License-Identifier: GPL-2.0-or-later
/*
TDA10023 - DVB - C decoder
( as used in Philips CU1216 - 3 NIM and the Reelbox DVB - C tuner card )
Copyright ( C ) 2005 Georg Acher , BayCom GmbH ( acher at baycom dot de )
Copyright ( c ) 2006 Hartmut Birr ( e9hack at gmail dot com )
Remotely based on tda10021 . c
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 <asm /div64.h>
#include <media/dvb_frontend.h>
#include "tda1002x.h"
#define REG0_INIT_VAL 0 x23
struct tda10023_state {
struct i2c_adapter* i2c;
/* configuration settings */
const struct tda10023_config *config;
struct dvb_frontend frontend;
u8 pwm;
u8 reg0;
/* clock settings */
u32 xtal;
u8 pll_m;
u8 pll_p;
u8 pll_n;
u32 sysclk;
};
#define dprintk(x...)
static int verbose;
static u8 tda10023_readreg (struct tda10023_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 );
if (ret != 2 ) {
int num = state->frontend.dvb ? state->frontend.dvb->num : -1 ;
printk(KERN_ERR "DVB: TDA10023(%d): %s: readreg error (reg == 0x%02x, ret == %i)\n" ,
num, __func__, reg, ret);
}
return b1[0 ];
}
static int tda10023_writereg (struct tda10023_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 ) {
int num = state->frontend.dvb ? state->frontend.dvb->num : -1 ;
printk(KERN_ERR "DVB: TDA10023(%d): %s, writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n" ,
num, __func__, reg, data, ret);
}
return (ret != 1 ) ? -EREMOTEIO : 0 ;
}
static int tda10023_writebit (struct tda10023_state* state, u8 reg, u8 mask,u8 data)
{
if (mask==0 xff)
return tda10023_writereg(state, reg, data);
else {
u8 val;
val=tda10023_readreg(state,reg);
val&=~mask;
val|=(data&mask);
return tda10023_writereg(state, reg, val);
}
}
static void tda10023_writetab(struct tda10023_state* state, u8* tab)
{
u8 r,m,v;
while (1 ) {
r=*tab++;
m=*tab++;
v=*tab++;
if (r==0 xff) {
if (m==0 xff)
break ;
else
msleep(m);
}
else
tda10023_writebit(state,r,m,v);
}
}
//get access to tuner
static int lock_tuner(struct tda10023_state* state)
{
u8 buf[2 ] = { 0 x0f, 0 xc0 };
struct i2c_msg msg = {.addr=state->config->demod_address, .flags=0 , .buf=buf, .len=2 };
if (i2c_transfer(state->i2c, &msg, 1 ) != 1 )
{
printk("tda10023: lock tuner fails\n" );
return -EREMOTEIO;
}
return 0 ;
}
//release access from tuner
static int unlock_tuner(struct tda10023_state* state)
{
u8 buf[2 ] = { 0 x0f, 0 x40 };
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("tda10023: unlock tuner fails\n" );
return -EREMOTEIO;
}
return 0 ;
}
static int tda10023_setup_reg0 (struct tda10023_state* state, u8 reg0)
{
reg0 |= state->reg0 & 0 x63;
tda10023_writereg (state, 0 x00, reg0 & 0 xfe);
tda10023_writereg (state, 0 x00, reg0 | 0 x01);
state->reg0 = reg0;
return 0 ;
}
static int tda10023_set_symbolrate (struct tda10023_state* state, u32 sr)
{
s32 BDR;
s32 BDRI;
s16 SFIL=0 ;
u16 NDEC = 0 ;
/* avoid floating point operations multiplying syscloc and divider
by 10 */
u32 sysclk_x_10 = state->sysclk * 10 ;
if (sr < (u32)(sysclk_x_10/984 )) {
NDEC=3 ;
SFIL=1 ;
} else if (sr < (u32)(sysclk_x_10/640 )) {
NDEC=3 ;
SFIL=0 ;
} else if (sr < (u32)(sysclk_x_10/492 )) {
NDEC=2 ;
SFIL=1 ;
} else if (sr < (u32)(sysclk_x_10/320 )) {
NDEC=2 ;
SFIL=0 ;
} else if (sr < (u32)(sysclk_x_10/246 )) {
NDEC=1 ;
SFIL=1 ;
} else if (sr < (u32)(sysclk_x_10/160 )) {
NDEC=1 ;
SFIL=0 ;
} else if (sr < (u32)(sysclk_x_10/123 )) {
NDEC=0 ;
SFIL=1 ;
}
BDRI = (state->sysclk)*16 ;
BDRI>>=NDEC;
BDRI +=sr/2 ;
BDRI /=sr;
if (BDRI>255 )
BDRI=255 ;
{
u64 BDRX;
BDRX=1 <<(24 +NDEC);
BDRX*=sr;
do_div(BDRX, state->sysclk); /* BDRX/=SYSCLK; */
BDR=(s32)BDRX;
}
dprintk("Symbolrate %i, BDR %i BDRI %i, NDEC %i\n" ,
sr, BDR, BDRI, NDEC);
tda10023_writebit (state, 0 x03, 0 xc0, NDEC<<6 );
tda10023_writereg (state, 0 x0a, BDR&255 );
tda10023_writereg (state, 0 x0b, (BDR>>8 )&255 );
tda10023_writereg (state, 0 x0c, (BDR>>16 )&31 );
tda10023_writereg (state, 0 x0d, BDRI);
tda10023_writereg (state, 0 x3d, (SFIL<<7 ));
return 0 ;
}
static int tda10023_init (struct dvb_frontend *fe)
{
struct tda10023_state* state = fe->demodulator_priv;
u8 tda10023_inittab[] = {
/* reg mask val */
/* 000 */ 0x2a, 0xff, 0x02, /* PLL3, Bypass, Power Down */
/* 003 */ 0xff, 0x64, 0x00, /* Sleep 100ms */
/* 006 */ 0x2a, 0xff, 0x03, /* PLL3, Bypass, Power Down */
/* 009 */ 0xff, 0x64, 0x00, /* Sleep 100ms */
/* PLL1 */
/* 012 */ 0x28, 0xff, (state->pll_m-1),
/* PLL2 */
/* 015 */ 0x29, 0xff, ((state->pll_p-1)<<6)|(state->pll_n-1),
/* GPR FSAMPLING=1 */
/* 018 */ 0x00, 0xff, REG0_INIT_VAL,
/* 021 */ 0x2a, 0xff, 0x08, /* PLL3 PSACLK=1 */
/* 024 */ 0xff, 0x64, 0x00, /* Sleep 100ms */
/* 027 */ 0x1f, 0xff, 0x00, /* RESET */
/* 030 */ 0xff, 0x64, 0x00, /* Sleep 100ms */
/* 033 */ 0xe6, 0x0c, 0x04, /* RSCFG_IND */
/* 036 */ 0x10, 0xc0, 0x80, /* DECDVBCFG1 PBER=1 */
/* 039 */ 0x0e, 0xff, 0x82, /* GAIN1 */
/* 042 */ 0x03, 0x08, 0x08, /* CLKCONF DYN=1 */
/* 045 */ 0x2e, 0xbf, 0x30, /* AGCCONF2 TRIAGC=0,POSAGC=ENAGCIF=1
PPWMTUN=0 PPWMIF=0 */
/* 048 */ 0x01, 0xff, 0x30, /* AGCREF */
/* 051 */ 0x1e, 0x84, 0x84, /* CONTROL SACLK_ON=1 */
/* 054 */ 0x1b, 0xff, 0xc8, /* ADC TWOS=1 */
/* 057 */ 0x3b, 0xff, 0xff, /* IFMAX */
/* 060 */ 0x3c, 0xff, 0x00, /* IFMIN */
/* 063 */ 0x34, 0xff, 0x00, /* PWMREF */
/* 066 */ 0x35, 0xff, 0xff, /* TUNMAX */
/* 069 */ 0x36, 0xff, 0x00, /* TUNMIN */
/* 072 */ 0x06, 0xff, 0x7f, /* EQCONF1 POSI=7 ENADAPT=ENEQUAL=DFE=1 */
/* 075 */ 0x1c, 0x30, 0x30, /* EQCONF2 STEPALGO=SGNALGO=1 */
/* 078 */ 0x37, 0xff, 0xf6, /* DELTAF_LSB */
/* 081 */ 0x38, 0xff, 0xff, /* DELTAF_MSB */
/* 084 */ 0x02, 0xff, 0x93, /* AGCCONF1 IFS=1 KAGCIF=2 KAGCTUN=3 */
/* 087 */ 0x2d, 0xff, 0xf6, /* SWEEP SWPOS=1 SWDYN=7 SWSTEP=1 SWLEN=2 */
/* 090 */ 0x04, 0x10, 0x00, /* SWRAMP=1 */
/* 093 */ 0x12, 0xff, TDA10023_OUTPUT_MODE_PARALLEL_B, /*
INTP1 POCLKP=1 FEL=1 MFS=0 */
/* 096 */ 0x2b, 0x01, 0xa1, /* INTS1 */
/* 099 */ 0x20, 0xff, 0x04, /* INTP2 SWAPP=? MSBFIRSTP=? INTPSEL=? */
/* 102 */ 0x2c, 0xff, 0x0d, /* INTP/S TRIP=0 TRIS=0 */
/* 105 */ 0xc4, 0xff, 0x00,
/* 108 */ 0xc3, 0x30, 0x00,
/* 111 */ 0xb5, 0xff, 0x19, /* ERAGC_THD */
/* 114 */ 0x00, 0x03, 0x01, /* GPR, CLBS soft reset */
/* 117 */ 0x00, 0x03, 0x03, /* GPR, CLBS soft reset */
/* 120 */ 0xff, 0x64, 0x00, /* Sleep 100ms */
/* 123 */ 0xff, 0xff, 0xff
};
dprintk("DVB: TDA10023(%d): init chip\n" , fe->dvb->num);
/* override default values if set in config */
if (state->config->deltaf) {
tda10023_inittab[80 ] = (state->config->deltaf & 0 xff);
tda10023_inittab[83 ] = (state->config->deltaf >> 8 );
}
if (state->config->output_mode)
tda10023_inittab[95 ] = state->config->output_mode;
tda10023_writetab(state, tda10023_inittab);
return 0 ;
}
struct qam_params {
u8 qam, lockthr, mseth, aref, agcrefnyq, eragnyq_thd;
};
static int tda10023_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;
struct tda10023_state* state = fe->demodulator_priv;
static const struct qam_params qam_params[] = {
/* Modulation QAM LOCKTHR MSETH AREF AGCREFNYQ ERAGCNYQ_THD */
[QPSK] = { (5 <<2 ), 0 x78, 0 x8c, 0 x96, 0 x78, 0 x4c },
[QAM_16] = { (0 <<2 ), 0 x87, 0 xa2, 0 x91, 0 x8c, 0 x57 },
[QAM_32] = { (1 <<2 ), 0 x64, 0 x74, 0 x96, 0 x8c, 0 x57 },
[QAM_64] = { (2 <<2 ), 0 x46, 0 x43, 0 x6a, 0 x6a, 0 x44 },
[QAM_128] = { (3 <<2 ), 0 x36, 0 x34, 0 x7e, 0 x78, 0 x4c },
[QAM_256] = { (4 <<2 ), 0 x26, 0 x23, 0 x6c, 0 x5c, 0 x3c },
};
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 (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 );
}
tda10023_set_symbolrate(state, c->symbol_rate);
tda10023_writereg(state, 0 x05, qam_params[qam].lockthr);
tda10023_writereg(state, 0 x08, qam_params[qam].mseth);
tda10023_writereg(state, 0 x09, qam_params[qam].aref);
tda10023_writereg(state, 0 xb4, qam_params[qam].agcrefnyq);
tda10023_writereg(state, 0 xb6, qam_params[qam].eragnyq_thd);
#if 0
tda10023_writereg(state, 0 x04, (c->inversion ? 0 x12 : 0 x32));
tda10023_writebit(state, 0 x04, 0 x60, (c->inversion ? 0 : 0 x20));
#endif
tda10023_writebit(state, 0 x04, 0 x40, 0 x40);
if (is_annex_c)
tda10023_writebit(state, 0 x3d, 0 xfc, 0 x03);
else
tda10023_writebit(state, 0 x3d, 0 xfc, 0 x02);
tda10023_setup_reg0(state, qam_params[qam].qam);
return 0 ;
}
static int tda10023_read_status(struct dvb_frontend *fe,
enum fe_status *status)
{
struct tda10023_state* state = fe->demodulator_priv;
int sync;
*status = 0 ;
//0x11[1] == CARLOCK -> Carrier locked
//0x11[2] == FSYNC -> Frame synchronisation
//0x11[3] == FEL -> Front End locked
//0x11[6] == NODVB -> DVB Mode Information
sync = tda10023_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 tda10023_read_ber(struct dvb_frontend* fe, u32* ber)
{
struct tda10023_state* state = fe->demodulator_priv;
u8 a,b,c;
a=tda10023_readreg(state, 0 x14);
b=tda10023_readreg(state, 0 x15);
c=tda10023_readreg(state, 0 x16)&0 xf;
tda10023_writebit (state, 0 x10, 0 xc0, 0 x00);
*ber = a | (b<<8 )| (c<<16 );
return 0 ;
}
static int tda10023_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
struct tda10023_state* state = fe->demodulator_priv;
u8 ifgain=tda10023_readreg(state, 0 x2f);
u16 gain = ((255 -tda10023_readreg(state, 0 x17))) + (255 -ifgain)/16 ;
// Max raw value is about 0xb0 -> Normalize to >0xf0 after 0x90
if (gain>0 x90)
gain=gain+2 *(gain-0 x90);
if (gain>255 )
gain=255 ;
*strength = (gain<<8 )|gain;
return 0 ;
}
static int tda10023_read_snr(struct dvb_frontend* fe, u16* snr)
{
struct tda10023_state* state = fe->demodulator_priv;
u8 quality = ~tda10023_readreg(state, 0 x18);
*snr = (quality << 8 ) | quality;
return 0 ;
}
static int tda10023_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
struct tda10023_state* state = fe->demodulator_priv;
u8 a,b,c,d;
a= tda10023_readreg (state, 0 x74);
b= tda10023_readreg (state, 0 x75);
c= tda10023_readreg (state, 0 x76);
d= tda10023_readreg (state, 0 x77);
*ucblocks = a | (b<<8 )|(c<<16 )|(d<<24 );
tda10023_writebit (state, 0 x10, 0 x20,0 x00);
tda10023_writebit (state, 0 x10, 0 x20,0 x20);
tda10023_writebit (state, 0 x13, 0 x01, 0 x00);
return 0 ;
}
static int tda10023_get_frontend(struct dvb_frontend *fe,
struct dtv_frontend_properties *p)
{
struct tda10023_state* state = fe->demodulator_priv;
int sync,inv;
s8 afc = 0 ;
sync = tda10023_readreg(state, 0 x11);
afc = tda10023_readreg(state, 0 x19);
inv = tda10023_readreg(state, 0 x04);
if (verbose) {
/* AFC only valid when carrier has been recovered */
printk(sync & 2 ? "DVB: TDA10023(%d): AFC (%d) %dHz\n" :
"DVB: TDA10023(%d): [AFC (%d) %dHz]\n" ,
state->frontend.dvb->num, afc,
-((s32)p->symbol_rate * afc) >> 10 );
}
p->inversion = (inv&0 x20?0 :1 );
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 tda10023_sleep(struct dvb_frontend* fe)
{
struct tda10023_state* state = fe->demodulator_priv;
tda10023_writereg (state, 0 x1b, 0 x02); /* pdown ADC */
tda10023_writereg (state, 0 x00, 0 x80); /* standby */
return 0 ;
}
static int tda10023_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
{
struct tda10023_state* state = fe->demodulator_priv;
if (enable) {
lock_tuner(state);
} else {
unlock_tuner(state);
}
return 0 ;
}
static void tda10023_release(struct dvb_frontend* fe)
{
struct tda10023_state* state = fe->demodulator_priv;
kfree(state);
}
static const struct dvb_frontend_ops tda10023_ops;
struct dvb_frontend *tda10023_attach(const struct tda10023_config *config,
struct i2c_adapter *i2c,
u8 pwm)
{
struct tda10023_state* state = NULL;
/* allocate memory for the internal state */
state = kzalloc(sizeof (struct tda10023_state), GFP_KERNEL);
if (state == NULL) goto error;
/* setup the state */
state->config = config;
state->i2c = i2c;
/* wakeup if in standby */
tda10023_writereg (state, 0 x00, 0 x33);
/* check if the demod is there */
if ((tda10023_readreg(state, 0 x1a) & 0 xf0) != 0 x70) goto error;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &tda10023_ops, sizeof (struct dvb_frontend_ops));
state->pwm = pwm;
state->reg0 = REG0_INIT_VAL;
if (state->config->xtal) {
state->xtal = state->config->xtal;
state->pll_m = state->config->pll_m;
state->pll_p = state->config->pll_p;
state->pll_n = state->config->pll_n;
} else {
/* set default values if not defined in config */
state->xtal = 28920000 ;
state->pll_m = 8 ;
state->pll_p = 4 ;
state->pll_n = 1 ;
}
/* calc sysclk */
state->sysclk = (state->xtal * state->pll_m / \
(state->pll_n * state->pll_p));
state->frontend.ops.info.symbol_rate_min = (state->sysclk/2 )/64 ;
state->frontend.ops.info.symbol_rate_max = (state->sysclk/2 )/4 ;
dprintk("DVB: TDA10023 %s: xtal:%d pll_m:%d pll_p:%d pll_n:%d\n" ,
__func__, state->xtal, state->pll_m, state->pll_p,
state->pll_n);
state->frontend.demodulator_priv = state;
return &state->frontend;
error:
kfree(state);
return NULL;
}
static const struct dvb_frontend_ops tda10023_ops = {
.delsys = { SYS_DVBC_ANNEX_A, SYS_DVBC_ANNEX_C },
.info = {
.name = "Philips TDA10023 DVB-C" ,
.frequency_min_hz = 47 * MHz,
.frequency_max_hz = 862 * MHz,
.frequency_stepsize_hz = 62500 ,
.symbol_rate_min = 0 , /* set in tda10023_attach */
.symbol_rate_max = 0 , /* set in tda10023_attach */
.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 = tda10023_release,
.init = tda10023_init,
.sleep = tda10023_sleep,
.i2c_gate_ctrl = tda10023_i2c_gate_ctrl,
.set_frontend = tda10023_set_parameters,
.get_frontend = tda10023_get_frontend,
.read_status = tda10023_read_status,
.read_ber = tda10023_read_ber,
.read_signal_strength = tda10023_read_signal_strength,
.read_snr = tda10023_read_snr,
.read_ucblocks = tda10023_read_ucblocks,
};
MODULE_DESCRIPTION("Philips TDA10023 DVB-C demodulator driver" );
MODULE_AUTHOR("Georg Acher, Hartmut Birr" );
MODULE_LICENSE("GPL" );
EXPORT_SYMBOL_GPL(tda10023_attach);
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