// SPDX-License-Identifier: GPL-2.0-or-later
/*
Driver for ST STV0288 demodulator
Copyright (C) 2006 Georg Acher, BayCom GmbH, acher (at) baycom (dot) de
for Reel Multimedia
Copyright (C) 2008 TurboSight.com, Bob Liu <bob@turbosight.com>
Copyright (C) 2008 Igor M. Liplianin <liplianin@me.by>
Removed stb6000 specific tuner code and revised some
procedures.
2010-09-01 Josef Pavlik <josef@pavlik.it>
Fixed diseqc_msg, diseqc_burst and set_tone problems
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <asm /div64.h>
#include <media/dvb_frontend.h>
#include "stv0288.h"
struct stv0288_state {
struct i2c_adapter *i2c;
const struct stv0288_config *config;
struct dvb_frontend frontend;
u8 initialised:1 ;
u32 tuner_frequency;
u32 symbol_rate;
enum fe_code_rate fec_inner;
int errmode;
};
#define STATUS_BER 0
#define STATUS_UCBLOCKS 1
static int debug;
static int debug_legacy_dish_switch;
#define dprintk(args...) \
do { \
if (debug) \
printk(KERN_DEBUG "stv0288: " args); \
} while (0 )
static int stv0288_writeregI(struct stv0288_state *state, u8 reg, u8 data)
{
int ret;
u8 buf[] = { reg, data };
struct i2c_msg msg = {
.addr = state->config->demod_address,
.flags = 0 ,
.buf = buf,
.len = 2
};
ret = i2c_transfer(state->i2c, &msg, 1 );
if (ret != 1 )
dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n" ,
__func__, reg, data, ret);
return (ret != 1 ) ? -EREMOTEIO : 0 ;
}
static int stv0288_write(struct dvb_frontend *fe, const u8 buf[], int len)
{
struct stv0288_state *state = fe->demodulator_priv;
if (len != 2 )
return -EINVAL;
return stv0288_writeregI(state, buf[0 ], buf[1 ]);
}
static u8 stv0288_readreg(struct stv0288_state *state, u8 reg)
{
int ret;
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
}
};
ret = i2c_transfer(state->i2c, msg, 2 );
if (ret != 2 )
dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n" ,
__func__, reg, ret);
return b1[0 ];
}
static int stv0288_set_symbolrate(struct dvb_frontend *fe, u32 srate)
{
struct stv0288_state *state = fe->demodulator_priv;
unsigned int temp;
unsigned char b[3 ];
if ((srate < 1000000 ) || (srate > 45000000 ))
return -EINVAL;
stv0288_writeregI(state, 0 x22, 0 );
stv0288_writeregI(state, 0 x23, 0 );
stv0288_writeregI(state, 0 x2b, 0 xff);
stv0288_writeregI(state, 0 x2c, 0 xf7);
temp = (unsigned int )srate / 1000 ;
temp = temp * 32768 ;
temp = temp / 25 ;
temp = temp / 125 ;
b[0 ] = (unsigned char )((temp >> 12 ) & 0 xff);
b[1 ] = (unsigned char )((temp >> 4 ) & 0 xff);
b[2 ] = (unsigned char )((temp << 4 ) & 0 xf0);
stv0288_writeregI(state, 0 x28, 0 x80); /* SFRH */
stv0288_writeregI(state, 0 x29, 0 ); /* SFRM */
stv0288_writeregI(state, 0 x2a, 0 ); /* SFRL */
stv0288_writeregI(state, 0 x28, b[0 ]);
stv0288_writeregI(state, 0 x29, b[1 ]);
stv0288_writeregI(state, 0 x2a, b[2 ]);
dprintk("stv0288: stv0288_set_symbolrate\n" );
return 0 ;
}
static int stv0288_send_diseqc_msg(struct dvb_frontend *fe,
struct dvb_diseqc_master_cmd *m)
{
struct stv0288_state *state = fe->demodulator_priv;
int i;
dprintk("%s\n" , __func__);
stv0288_writeregI(state, 0 x09, 0 );
msleep(30 );
stv0288_writeregI(state, 0 x05, 0 x12);/* modulated mode, single shot */
for (i = 0 ; i < m->msg_len; i++) {
if (stv0288_writeregI(state, 0 x06, m->msg[i]))
return -EREMOTEIO;
}
msleep(m->msg_len*12 );
return 0 ;
}
static int stv0288_send_diseqc_burst(struct dvb_frontend *fe,
enum fe_sec_mini_cmd burst)
{
struct stv0288_state *state = fe->demodulator_priv;
dprintk("%s\n" , __func__);
if (stv0288_writeregI(state, 0 x05, 0 x03))/* burst mode, single shot */
return -EREMOTEIO;
if (stv0288_writeregI(state, 0 x06, burst == SEC_MINI_A ? 0 x00 : 0 xff))
return -EREMOTEIO;
msleep(15 );
if (stv0288_writeregI(state, 0 x05, 0 x12))
return -EREMOTEIO;
return 0 ;
}
static int stv0288_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone)
{
struct stv0288_state *state = fe->demodulator_priv;
switch (tone) {
case SEC_TONE_ON:
if (stv0288_writeregI(state, 0 x05, 0 x10))/* cont carrier */
return -EREMOTEIO;
break ;
case SEC_TONE_OFF:
if (stv0288_writeregI(state, 0 x05, 0 x12))/* burst mode off*/
return -EREMOTEIO;
break ;
default :
return -EINVAL;
}
return 0 ;
}
static u8 stv0288_inittab[] = {
0 x01, 0 x15,
0 x02, 0 x20,
0 x09, 0 x0,
0 x0a, 0 x4,
0 x0b, 0 x0,
0 x0c, 0 x0,
0 x0d, 0 x0,
0 x0e, 0 xd4,
0 x0f, 0 x30,
0 x11, 0 x80,
0 x12, 0 x03,
0 x13, 0 x48,
0 x14, 0 x84,
0 x15, 0 x45,
0 x16, 0 xb7,
0 x17, 0 x9c,
0 x18, 0 x0,
0 x19, 0 xa6,
0 x1a, 0 x88,
0 x1b, 0 x8f,
0 x1c, 0 xf0,
0 x20, 0 x0b,
0 x21, 0 x54,
0 x22, 0 x0,
0 x23, 0 x0,
0 x2b, 0 xff,
0 x2c, 0 xf7,
0 x30, 0 x0,
0 x31, 0 x1e,
0 x32, 0 x14,
0 x33, 0 x0f,
0 x34, 0 x09,
0 x35, 0 x0c,
0 x36, 0 x05,
0 x37, 0 x2f,
0 x38, 0 x16,
0 x39, 0 xbe,
0 x3a, 0 x0,
0 x3b, 0 x13,
0 x3c, 0 x11,
0 x3d, 0 x30,
0 x40, 0 x63,
0 x41, 0 x04,
0 x42, 0 x20,
0 x43, 0 x00,
0 x44, 0 x00,
0 x45, 0 x00,
0 x46, 0 x00,
0 x47, 0 x00,
0 x4a, 0 x00,
0 x50, 0 x10,
0 x51, 0 x38,
0 x52, 0 x21,
0 x58, 0 x54,
0 x59, 0 x86,
0 x5a, 0 x0,
0 x5b, 0 x9b,
0 x5c, 0 x08,
0 x5d, 0 x7f,
0 x5e, 0 x0,
0 x5f, 0 xff,
0 x70, 0 x0,
0 x71, 0 x0,
0 x72, 0 x0,
0 x74, 0 x0,
0 x75, 0 x0,
0 x76, 0 x0,
0 x81, 0 x0,
0 x82, 0 x3f,
0 x83, 0 x3f,
0 x84, 0 x0,
0 x85, 0 x0,
0 x88, 0 x0,
0 x89, 0 x0,
0 x8a, 0 x0,
0 x8b, 0 x0,
0 x8c, 0 x0,
0 x90, 0 x0,
0 x91, 0 x0,
0 x92, 0 x0,
0 x93, 0 x0,
0 x94, 0 x1c,
0 x97, 0 x0,
0 xa0, 0 x48,
0 xa1, 0 x0,
0 xb0, 0 xb8,
0 xb1, 0 x3a,
0 xb2, 0 x10,
0 xb3, 0 x82,
0 xb4, 0 x80,
0 xb5, 0 x82,
0 xb6, 0 x82,
0 xb7, 0 x82,
0 xb8, 0 x20,
0 xb9, 0 x0,
0 xf0, 0 x0,
0 xf1, 0 x0,
0 xf2, 0 xc0,
0 x51, 0 x36,
0 x52, 0 x09,
0 x53, 0 x94,
0 x54, 0 x62,
0 x55, 0 x29,
0 x56, 0 x64,
0 x57, 0 x2b,
0 xff, 0 xff,
};
static int stv0288_set_voltage(struct dvb_frontend *fe,
enum fe_sec_voltage volt)
{
dprintk("%s: %s\n" , __func__,
volt == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
volt == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??" );
return 0 ;
}
static int stv0288_init(struct dvb_frontend *fe)
{
struct stv0288_state *state = fe->demodulator_priv;
int i;
u8 reg;
u8 val;
dprintk("stv0288: init chip\n" );
stv0288_writeregI(state, 0 x41, 0 x04);
msleep(50 );
/* we have default inittab */
if (state->config->inittab == NULL) {
for (i = 0 ; !(stv0288_inittab[i] == 0 xff &&
stv0288_inittab[i + 1 ] == 0 xff); i += 2 )
stv0288_writeregI(state, stv0288_inittab[i],
stv0288_inittab[i + 1 ]);
} else {
for (i = 0 ; ; i += 2 ) {
reg = state->config->inittab[i];
val = state->config->inittab[i+1 ];
if (reg == 0 xff && val == 0 xff)
break ;
stv0288_writeregI(state, reg, val);
}
}
return 0 ;
}
static int stv0288_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
struct stv0288_state *state = fe->demodulator_priv;
u8 sync = stv0288_readreg(state, 0 x24);
if (sync == 255 )
sync = 0 ;
dprintk("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n" , __func__, sync);
*status = 0 ;
if (sync & 0 x80)
*status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
if (sync & 0 x10)
*status |= FE_HAS_VITERBI;
if (sync & 0 x08) {
*status |= FE_HAS_LOCK;
dprintk("stv0288 has locked\n" );
}
return 0 ;
}
static int stv0288_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct stv0288_state *state = fe->demodulator_priv;
if (state->errmode != STATUS_BER)
return 0 ;
*ber = (stv0288_readreg(state, 0 x26) << 8 ) |
stv0288_readreg(state, 0 x27);
dprintk("stv0288_read_ber %d\n" , *ber);
return 0 ;
}
static int stv0288_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
{
struct stv0288_state *state = fe->demodulator_priv;
s32 signal = 0 xffff - ((stv0288_readreg(state, 0 x10) << 8 ));
signal = signal * 5 / 4 ;
*strength = (signal > 0 xffff) ? 0 xffff : (signal < 0 ) ? 0 : signal;
dprintk("stv0288_read_signal_strength %d\n" , *strength);
return 0 ;
}
static int stv0288_sleep(struct dvb_frontend *fe)
{
struct stv0288_state *state = fe->demodulator_priv;
stv0288_writeregI(state, 0 x41, 0 x84);
state->initialised = 0 ;
return 0 ;
}
static int stv0288_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct stv0288_state *state = fe->demodulator_priv;
s32 xsnr = 0 xffff - ((stv0288_readreg(state, 0 x2d) << 8 )
| stv0288_readreg(state, 0 x2e));
xsnr = 3 * (xsnr - 0 xa100);
*snr = (xsnr > 0 xffff) ? 0 xffff : (xsnr < 0 ) ? 0 : xsnr;
dprintk("stv0288_read_snr %d\n" , *snr);
return 0 ;
}
static int stv0288_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
struct stv0288_state *state = fe->demodulator_priv;
if (state->errmode != STATUS_BER)
return 0 ;
*ucblocks = (stv0288_readreg(state, 0 x26) << 8 ) |
stv0288_readreg(state, 0 x27);
dprintk("stv0288_read_ber %d\n" , *ucblocks);
return 0 ;
}
static int stv0288_set_frontend(struct dvb_frontend *fe)
{
struct stv0288_state *state = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
u8 tda[3 ], reg, time_out = 0 ;
s8 tm;
dprintk("%s : FE_SET_FRONTEND\n" , __func__);
if (c->delivery_system != SYS_DVBS) {
dprintk("%s: unsupported delivery system selected (%d)\n" ,
__func__, c->delivery_system);
return -EOPNOTSUPP;
}
if (state->config->set_ts_params)
state->config->set_ts_params(fe, 0 );
/* only frequency & symbol_rate are used for tuner*/
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 );
}
udelay(10 );
stv0288_set_symbolrate(fe, c->symbol_rate);
/* Carrier lock control register */
stv0288_writeregI(state, 0 x15, 0 xc5);
tda[2 ] = 0 x0; /* CFRL */
for (tm = -9 ; tm < 7 ;) {
/* Viterbi status */
reg = stv0288_readreg(state, 0 x24);
if (reg & 0 x8)
break ;
if (reg & 0 x80) {
time_out++;
if (time_out > 10 )
break ;
tda[2 ] += 40 ;
if (tda[2 ] < 40 )
tm++;
} else {
tm++;
tda[2 ] = 0 ;
time_out = 0 ;
}
tda[1 ] = (unsigned char )tm;
stv0288_writeregI(state, 0 x2b, tda[1 ]);
stv0288_writeregI(state, 0 x2c, tda[2 ]);
msleep(30 );
}
state->tuner_frequency = c->frequency;
state->fec_inner = FEC_AUTO;
state->symbol_rate = c->symbol_rate;
return 0 ;
}
static int stv0288_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
{
struct stv0288_state *state = fe->demodulator_priv;
if (enable)
stv0288_writeregI(state, 0 x01, 0 xb5);
else
stv0288_writeregI(state, 0 x01, 0 x35);
udelay(1 );
return 0 ;
}
static void stv0288_release(struct dvb_frontend *fe)
{
struct stv0288_state *state = fe->demodulator_priv;
kfree(state);
}
static const struct dvb_frontend_ops stv0288_ops = {
.delsys = { SYS_DVBS },
.info = {
.name = "ST STV0288 DVB-S" ,
.frequency_min_hz = 950 * MHz,
.frequency_max_hz = 2150 * MHz,
.frequency_stepsize_hz = 1 * MHz,
.symbol_rate_min = 1000000 ,
.symbol_rate_max = 45000000 ,
.symbol_rate_tolerance = 500 , /* ppm */
.caps = 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_QPSK |
FE_CAN_FEC_AUTO
},
.release = stv0288_release,
.init = stv0288_init,
.sleep = stv0288_sleep,
.write = stv0288_write,
.i2c_gate_ctrl = stv0288_i2c_gate_ctrl,
.read_status = stv0288_read_status,
.read_ber = stv0288_read_ber,
.read_signal_strength = stv0288_read_signal_strength,
.read_snr = stv0288_read_snr,
.read_ucblocks = stv0288_read_ucblocks,
.diseqc_send_master_cmd = stv0288_send_diseqc_msg,
.diseqc_send_burst = stv0288_send_diseqc_burst,
.set_tone = stv0288_set_tone,
.set_voltage = stv0288_set_voltage,
.set_frontend = stv0288_set_frontend,
};
struct dvb_frontend *stv0288_attach(const struct stv0288_config *config,
struct i2c_adapter *i2c)
{
struct stv0288_state *state = NULL;
int id;
/* allocate memory for the internal state */
state = kzalloc(sizeof (struct stv0288_state), GFP_KERNEL);
if (state == NULL)
goto error;
/* setup the state */
state->config = config;
state->i2c = i2c;
state->initialised = 0 ;
state->tuner_frequency = 0 ;
state->symbol_rate = 0 ;
state->fec_inner = 0 ;
state->errmode = STATUS_BER;
stv0288_writeregI(state, 0 x41, 0 x04);
msleep(200 );
id = stv0288_readreg(state, 0 x00);
dprintk("stv0288 id %x\n" , id);
/* register 0x00 contains 0x11 for STV0288 */
if (id != 0 x11)
goto error;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &stv0288_ops,
sizeof (struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
error:
kfree(state);
return NULL;
}
EXPORT_SYMBOL_GPL(stv0288_attach);
module_param(debug_legacy_dish_switch, int , 0444 );
MODULE_PARM_DESC(debug_legacy_dish_switch,
"Enable timing analysis for Dish Network legacy switches" );
module_param(debug, int , 0644 );
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)." );
MODULE_DESCRIPTION("ST STV0288 DVB Demodulator driver" );
MODULE_AUTHOR("Georg Acher, Bob Liu, Igor liplianin" );
MODULE_LICENSE("GPL" );
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