// SPDX-License-Identifier: GPL-2.0-or-later
/*
Driver for Zarlink VP310 / MT312 / ZL10313 Satellite Channel Decoder
Copyright ( C ) 2003 Andreas Oberritter < obi @ linuxtv . org >
Copyright ( C ) 2008 Matthias Schwarzott < zzam @ gentoo . org >
References :
http : //products.zarlink.com/product_profiles/MT312.htm
http : //products.zarlink.com/product_profiles/SL1935.htm
*/
#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 "mt312_priv.h"
#include "mt312.h"
/* Max transfer size done by I2C transfer functions */
#define MAX_XFER_SIZE 64
struct mt312_state {
struct i2c_adapter *i2c;
/* configuration settings */
const struct mt312_config *config;
struct dvb_frontend frontend;
u8 id;
unsigned long xtal;
u8 freq_mult;
};
static int debug;
#define dprintk(args...) \
do { \
if (debug) \
printk(KERN_DEBUG "mt312: " args); \
} while (0 )
#define MT312_PLL_CLK 10000000 UL /* 10 MHz */
#define MT312_PLL_CLK_10_111 10111000 UL /* 10.111 MHz */
static int mt312_read(struct mt312_state *state, const enum mt312_reg_addr reg,
u8 *buf, const size_t count)
{
int ret;
struct i2c_msg msg[2 ];
u8 regbuf[1 ] = { reg };
msg[0 ].addr = state->config->demod_address;
msg[0 ].flags = 0 ;
msg[0 ].buf = regbuf;
msg[0 ].len = 1 ;
msg[1 ].addr = state->config->demod_address;
msg[1 ].flags = I2C_M_RD;
msg[1 ].buf = buf;
msg[1 ].len = count;
ret = i2c_transfer(state->i2c, msg, 2 );
if (ret != 2 ) {
printk(KERN_DEBUG "%s: ret == %d\n" , __func__, ret);
return -EREMOTEIO;
}
if (debug) {
int i;
dprintk("R(%d):" , reg & 0 x7f);
for (i = 0 ; i < count; i++)
printk(KERN_CONT " %02x" , buf[i]);
printk("\n" );
}
return 0 ;
}
static int mt312_write(struct mt312_state *state, const enum mt312_reg_addr reg,
const u8 *src, const size_t count)
{
int ret;
u8 buf[MAX_XFER_SIZE];
struct i2c_msg msg;
if (1 + count > sizeof (buf)) {
printk(KERN_WARNING
"mt312: write: len=%zu is too big!\n" , count);
return -EINVAL;
}
if (debug) {
int i;
dprintk("W(%d):" , reg & 0 x7f);
for (i = 0 ; i < count; i++)
printk(KERN_CONT " %02x" , src[i]);
printk("\n" );
}
buf[0 ] = reg;
memcpy(&buf[1 ], src, count);
msg.addr = state->config->demod_address;
msg.flags = 0 ;
msg.buf = buf;
msg.len = count + 1 ;
ret = i2c_transfer(state->i2c, &msg, 1 );
if (ret != 1 ) {
dprintk("%s: ret == %d\n" , __func__, ret);
return -EREMOTEIO;
}
return 0 ;
}
static inline int mt312_readreg(struct mt312_state *state,
const enum mt312_reg_addr reg, u8 *val)
{
return mt312_read(state, reg, val, 1 );
}
static inline int mt312_writereg(struct mt312_state *state,
const enum mt312_reg_addr reg, const u8 val)
{
u8 tmp = val; /* see gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */
return mt312_write(state, reg, &tmp, 1 );
}
static int mt312_reset(struct mt312_state *state, const u8 full)
{
return mt312_writereg(state, RESET, full ? 0 x80 : 0 x40);
}
static int mt312_get_inversion(struct mt312_state *state,
enum fe_spectral_inversion *i)
{
int ret;
u8 vit_mode;
ret = mt312_readreg(state, VIT_MODE, &vit_mode);
if (ret < 0 )
return ret;
if (vit_mode & 0 x80) /* auto inversion was used */
*i = (vit_mode & 0 x40) ? INVERSION_ON : INVERSION_OFF;
return 0 ;
}
static int mt312_get_symbol_rate(struct mt312_state *state, u32 *sr)
{
int ret;
u8 sym_rate_h;
u8 dec_ratio;
u16 sym_rat_op;
u16 monitor;
u8 buf[2 ];
ret = mt312_readreg(state, SYM_RATE_H, &sym_rate_h);
if (ret < 0 )
return ret;
if (sym_rate_h & 0 x80) {
/* symbol rate search was used */
ret = mt312_writereg(state, MON_CTRL, 0 x03);
if (ret < 0 )
return ret;
ret = mt312_read(state, MONITOR_H, buf, sizeof (buf));
if (ret < 0 )
return ret;
monitor = (buf[0 ] << 8 ) | buf[1 ];
dprintk("sr(auto) = %u\n" ,
DIV_ROUND_CLOSEST(monitor * 15625 , 4 ));
} else {
ret = mt312_writereg(state, MON_CTRL, 0 x05);
if (ret < 0 )
return ret;
ret = mt312_read(state, MONITOR_H, buf, sizeof (buf));
if (ret < 0 )
return ret;
dec_ratio = ((buf[0 ] >> 5 ) & 0 x07) * 32 ;
ret = mt312_read(state, SYM_RAT_OP_H, buf, sizeof (buf));
if (ret < 0 )
return ret;
sym_rat_op = (buf[0 ] << 8 ) | buf[1 ];
dprintk("sym_rat_op=%d dec_ratio=%d\n" ,
sym_rat_op, dec_ratio);
dprintk("*sr(manual) = %lu\n" ,
(((state->xtal * 8192 ) / (sym_rat_op + 8192 )) *
2 ) - dec_ratio);
}
return 0 ;
}
static int mt312_get_code_rate(struct mt312_state *state, enum fe_code_rate *cr)
{
const enum fe_code_rate fec_tab[8 ] =
{ FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_6_7, FEC_7_8,
FEC_AUTO, FEC_AUTO };
int ret;
u8 fec_status;
ret = mt312_readreg(state, FEC_STATUS, &fec_status);
if (ret < 0 )
return ret;
*cr = fec_tab[(fec_status >> 4 ) & 0 x07];
return 0 ;
}
static int mt312_initfe(struct dvb_frontend *fe)
{
struct mt312_state *state = fe->demodulator_priv;
int ret;
u8 buf[2 ];
/* wake up */
ret = mt312_writereg(state, CONFIG,
(state->freq_mult == 6 ? 0 x88 : 0 x8c));
if (ret < 0 )
return ret;
/* wait at least 150 usec */
udelay(150 );
/* full reset */
ret = mt312_reset(state, 1 );
if (ret < 0 )
return ret;
/* Per datasheet, write correct values. 09/28/03 ACCJr.
* If we don't do this, we won't get FE_HAS_VITERBI in the VP310. */
{
u8 buf_def[8 ] = { 0 x14, 0 x12, 0 x03, 0 x02,
0 x01, 0 x00, 0 x00, 0 x00 };
ret = mt312_write(state, VIT_SETUP, buf_def, sizeof (buf_def));
if (ret < 0 )
return ret;
}
switch (state->id) {
case ID_ZL10313:
/* enable ADC */
ret = mt312_writereg(state, GPP_CTRL, 0 x80);
if (ret < 0 )
return ret;
/* configure ZL10313 for optimal ADC performance */
buf[0 ] = 0 x80;
buf[1 ] = 0 xB0;
ret = mt312_write(state, HW_CTRL, buf, 2 );
if (ret < 0 )
return ret;
/* enable MPEG output and ADCs */
ret = mt312_writereg(state, HW_CTRL, 0 x00);
if (ret < 0 )
return ret;
ret = mt312_writereg(state, MPEG_CTRL, 0 x00);
if (ret < 0 )
return ret;
break ;
}
/* SYS_CLK */
buf[0 ] = DIV_ROUND_CLOSEST(state->xtal * state->freq_mult * 2 , 1000000 );
/* DISEQC_RATIO */
buf[1 ] = DIV_ROUND_CLOSEST(state->xtal, 22000 * 4 );
ret = mt312_write(state, SYS_CLK, buf, sizeof (buf));
if (ret < 0 )
return ret;
ret = mt312_writereg(state, SNR_THS_HIGH, 0 x32);
if (ret < 0 )
return ret;
/* different MOCLK polarity */
switch (state->id) {
case ID_ZL10313:
buf[0 ] = 0 x33;
break ;
default :
buf[0 ] = 0 x53;
break ;
}
ret = mt312_writereg(state, OP_CTRL, buf[0 ]);
if (ret < 0 )
return ret;
/* TS_SW_LIM */
buf[0 ] = 0 x8c;
buf[1 ] = 0 x98;
ret = mt312_write(state, TS_SW_LIM_L, buf, sizeof (buf));
if (ret < 0 )
return ret;
ret = mt312_writereg(state, CS_SW_LIM, 0 x69);
if (ret < 0 )
return ret;
return 0 ;
}
static int mt312_send_master_cmd(struct dvb_frontend *fe,
struct dvb_diseqc_master_cmd *c)
{
struct mt312_state *state = fe->demodulator_priv;
int ret;
u8 diseqc_mode;
if ((c->msg_len == 0 ) || (c->msg_len > sizeof (c->msg)))
return -EINVAL;
ret = mt312_readreg(state, DISEQC_MODE, &diseqc_mode);
if (ret < 0 )
return ret;
ret = mt312_write(state, (0 x80 | DISEQC_INSTR), c->msg, c->msg_len);
if (ret < 0 )
return ret;
ret = mt312_writereg(state, DISEQC_MODE,
(diseqc_mode & 0 x40) | ((c->msg_len - 1 ) << 3 )
| 0 x04);
if (ret < 0 )
return ret;
/* is there a better way to wait for message to be transmitted */
msleep(100 );
/* set DISEQC_MODE[2:0] to zero if a return message is expected */
if (c->msg[0 ] & 0 x02) {
ret = mt312_writereg(state, DISEQC_MODE, (diseqc_mode & 0 x40));
if (ret < 0 )
return ret;
}
return 0 ;
}
static int mt312_send_burst(struct dvb_frontend *fe,
const enum fe_sec_mini_cmd c)
{
struct mt312_state *state = fe->demodulator_priv;
const u8 mini_tab[2 ] = { 0 x02, 0 x03 };
int ret;
u8 diseqc_mode;
if (c > SEC_MINI_B)
return -EINVAL;
ret = mt312_readreg(state, DISEQC_MODE, &diseqc_mode);
if (ret < 0 )
return ret;
ret = mt312_writereg(state, DISEQC_MODE,
(diseqc_mode & 0 x40) | mini_tab[c]);
if (ret < 0 )
return ret;
return 0 ;
}
static int mt312_set_tone(struct dvb_frontend *fe,
const enum fe_sec_tone_mode t)
{
struct mt312_state *state = fe->demodulator_priv;
const u8 tone_tab[2 ] = { 0 x01, 0 x00 };
int ret;
u8 diseqc_mode;
if (t > SEC_TONE_OFF)
return -EINVAL;
ret = mt312_readreg(state, DISEQC_MODE, &diseqc_mode);
if (ret < 0 )
return ret;
ret = mt312_writereg(state, DISEQC_MODE,
(diseqc_mode & 0 x40) | tone_tab[t]);
if (ret < 0 )
return ret;
return 0 ;
}
static int mt312_set_voltage(struct dvb_frontend *fe,
const enum fe_sec_voltage v)
{
struct mt312_state *state = fe->demodulator_priv;
const u8 volt_tab[3 ] = { 0 x00, 0 x40, 0 x00 };
u8 val;
if (v > SEC_VOLTAGE_OFF)
return -EINVAL;
val = volt_tab[v];
if (state->config->voltage_inverted)
val ^= 0 x40;
return mt312_writereg(state, DISEQC_MODE, val);
}
static int mt312_read_status(struct dvb_frontend *fe, enum fe_status *s)
{
struct mt312_state *state = fe->demodulator_priv;
int ret;
u8 status[3 ];
*s = 0 ;
ret = mt312_read(state, QPSK_STAT_H, status, sizeof (status));
if (ret < 0 )
return ret;
dprintk("QPSK_STAT_H: 0x%02x, QPSK_STAT_L: 0x%02x, FEC_STATUS: 0x%02x\n" ,
status[0 ], status[1 ], status[2 ]);
if (status[0 ] & 0 xc0)
*s |= FE_HAS_SIGNAL; /* signal noise ratio */
if (status[0 ] & 0 x04)
*s |= FE_HAS_CARRIER; /* qpsk carrier lock */
if (status[2 ] & 0 x02)
*s |= FE_HAS_VITERBI; /* viterbi lock */
if (status[2 ] & 0 x04)
*s |= FE_HAS_SYNC; /* byte align lock */
if (status[0 ] & 0 x01)
*s |= FE_HAS_LOCK; /* qpsk lock */
return 0 ;
}
static int mt312_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct mt312_state *state = fe->demodulator_priv;
int ret;
u8 buf[3 ];
ret = mt312_read(state, RS_BERCNT_H, buf, 3 );
if (ret < 0 )
return ret;
*ber = ((buf[0 ] << 16 ) | (buf[1 ] << 8 ) | buf[2 ]) * 64 ;
return 0 ;
}
static int mt312_read_signal_strength(struct dvb_frontend *fe,
u16 *signal_strength)
{
struct mt312_state *state = fe->demodulator_priv;
int ret;
u8 buf[3 ];
u16 agc;
s16 err_db;
ret = mt312_read(state, AGC_H, buf, sizeof (buf));
if (ret < 0 )
return ret;
agc = (buf[0 ] << 6 ) | (buf[1 ] >> 2 );
err_db = (s16) (((buf[1 ] & 0 x03) << 14 ) | buf[2 ] << 6 ) >> 6 ;
*signal_strength = agc;
dprintk("agc=%08x err_db=%hd\n" , agc, err_db);
return 0 ;
}
static int mt312_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct mt312_state *state = fe->demodulator_priv;
int ret;
u8 buf[2 ];
ret = mt312_read(state, M_SNR_H, buf, sizeof (buf));
if (ret < 0 )
return ret;
*snr = 0 xFFFF - ((((buf[0 ] & 0 x7f) << 8 ) | buf[1 ]) << 1 );
return 0 ;
}
static int mt312_read_ucblocks(struct dvb_frontend *fe, u32 *ubc)
{
struct mt312_state *state = fe->demodulator_priv;
int ret;
u8 buf[2 ];
ret = mt312_read(state, RS_UBC_H, buf, sizeof (buf));
if (ret < 0 )
return ret;
*ubc = (buf[0 ] << 8 ) | buf[1 ];
return 0 ;
}
static int mt312_set_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct mt312_state *state = fe->demodulator_priv;
int ret;
u8 buf[5 ], config_val;
u16 sr;
const u8 fec_tab[10 ] =
{ 0 x00, 0 x01, 0 x02, 0 x04, 0 x3f, 0 x08, 0 x10, 0 x20, 0 x3f, 0 x3f };
const u8 inv_tab[3 ] = { 0 x00, 0 x40, 0 x80 };
dprintk("%s: Freq %d\n" , __func__, p->frequency);
if ((p->frequency < fe->ops.info.frequency_min_hz / kHz)
|| (p->frequency > fe->ops.info.frequency_max_hz / kHz))
return -EINVAL;
if (((int )p->inversion < INVERSION_OFF)
|| (p->inversion > INVERSION_ON))
return -EINVAL;
if ((p->symbol_rate < fe->ops.info.symbol_rate_min)
|| (p->symbol_rate > fe->ops.info.symbol_rate_max))
return -EINVAL;
if (((int )p->fec_inner < FEC_NONE)
|| (p->fec_inner > FEC_AUTO))
return -EINVAL;
if ((p->fec_inner == FEC_4_5)
|| (p->fec_inner == FEC_8_9))
return -EINVAL;
switch (state->id) {
case ID_VP310:
/* For now we will do this only for the VP310.
* It should be better for the mt312 as well ,
* but tuning will be slower . ACCJr 09 / 29 / 03
*/
ret = mt312_readreg(state, CONFIG, &config_val);
if (ret < 0 )
return ret;
if (p->symbol_rate >= 30000000 ) {
/* Note that 30MS/s should use 90MHz */
if (state->freq_mult == 6 ) {
/* We are running 60MHz */
state->freq_mult = 9 ;
ret = mt312_initfe(fe);
if (ret < 0 )
return ret;
}
} else {
if (state->freq_mult == 9 ) {
/* We are running 90MHz */
state->freq_mult = 6 ;
ret = mt312_initfe(fe);
if (ret < 0 )
return ret;
}
}
break ;
case ID_MT312:
case ID_ZL10313:
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 );
}
/* sr = (u16)(sr * 256.0 / 1000000.0) */
sr = DIV_ROUND_CLOSEST(p->symbol_rate * 4 , 15625 );
/* SYM_RATE */
buf[0 ] = (sr >> 8 ) & 0 x3f;
buf[1 ] = (sr >> 0 ) & 0 xff;
/* VIT_MODE */
buf[2 ] = inv_tab[p->inversion] | fec_tab[p->fec_inner];
/* QPSK_CTRL */
buf[3 ] = 0 x40; /* swap I and Q before QPSK demodulation */
if (p->symbol_rate < 10000000 )
buf[3 ] |= 0 x04; /* use afc mode */
/* GO */
buf[4 ] = 0 x01;
ret = mt312_write(state, SYM_RATE_H, buf, sizeof (buf));
if (ret < 0 )
return ret;
ret = mt312_reset(state, 0 );
if (ret < 0 )
return ret;
return 0 ;
}
static int mt312_get_frontend(struct dvb_frontend *fe,
struct dtv_frontend_properties *p)
{
struct mt312_state *state = fe->demodulator_priv;
int ret;
ret = mt312_get_inversion(state, &p->inversion);
if (ret < 0 )
return ret;
ret = mt312_get_symbol_rate(state, &p->symbol_rate);
if (ret < 0 )
return ret;
ret = mt312_get_code_rate(state, &p->fec_inner);
if (ret < 0 )
return ret;
return 0 ;
}
static int mt312_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
{
struct mt312_state *state = fe->demodulator_priv;
u8 val = 0 x00;
int ret;
switch (state->id) {
case ID_ZL10313:
ret = mt312_readreg(state, GPP_CTRL, &val);
if (ret < 0 )
goto error;
/* preserve this bit to not accidentally shutdown ADC */
val &= 0 x80;
break ;
}
if (enable)
val |= 0 x40;
else
val &= ~0 x40;
ret = mt312_writereg(state, GPP_CTRL, val);
error:
return ret;
}
static int mt312_sleep(struct dvb_frontend *fe)
{
struct mt312_state *state = fe->demodulator_priv;
int ret;
u8 config;
/* reset all registers to defaults */
ret = mt312_reset(state, 1 );
if (ret < 0 )
return ret;
if (state->id == ID_ZL10313) {
/* reset ADC */
ret = mt312_writereg(state, GPP_CTRL, 0 x00);
if (ret < 0 )
return ret;
/* full shutdown of ADCs, mpeg bus tristated */
ret = mt312_writereg(state, HW_CTRL, 0 x0d);
if (ret < 0 )
return ret;
}
ret = mt312_readreg(state, CONFIG, &config);
if (ret < 0 )
return ret;
/* enter standby */
ret = mt312_writereg(state, CONFIG, config & 0 x7f);
if (ret < 0 )
return ret;
return 0 ;
}
static int mt312_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *fesettings)
{
fesettings->min_delay_ms = 50 ;
fesettings->step_size = 0 ;
fesettings->max_drift = 0 ;
return 0 ;
}
static void mt312_release(struct dvb_frontend *fe)
{
struct mt312_state *state = fe->demodulator_priv;
kfree(state);
}
#define MT312_SYS_CLK 90000000 UL /* 90 MHz */
static const struct dvb_frontend_ops mt312_ops = {
.delsys = { SYS_DVBS },
.info = {
.name = "Zarlink ???? DVB-S" ,
.frequency_min_hz = 950 * MHz,
.frequency_max_hz = 2150 * MHz,
/* FIXME: adjust freq to real used xtal */
.frequency_stepsize_hz = MT312_PLL_CLK / 128 ,
.symbol_rate_min = MT312_SYS_CLK / 128 , /* FIXME as above */
.symbol_rate_max = MT312_SYS_CLK / 2 ,
.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_FEC_AUTO | FE_CAN_QPSK | FE_CAN_MUTE_TS |
FE_CAN_RECOVER
},
.release = mt312_release,
.init = mt312_initfe,
.sleep = mt312_sleep,
.i2c_gate_ctrl = mt312_i2c_gate_ctrl,
.set_frontend = mt312_set_frontend,
.get_frontend = mt312_get_frontend,
.get_tune_settings = mt312_get_tune_settings,
.read_status = mt312_read_status,
.read_ber = mt312_read_ber,
.read_signal_strength = mt312_read_signal_strength,
.read_snr = mt312_read_snr,
.read_ucblocks = mt312_read_ucblocks,
.diseqc_send_master_cmd = mt312_send_master_cmd,
.diseqc_send_burst = mt312_send_burst,
.set_tone = mt312_set_tone,
.set_voltage = mt312_set_voltage,
};
struct dvb_frontend *mt312_attach(const struct mt312_config *config,
struct i2c_adapter *i2c)
{
struct mt312_state *state = NULL;
/* allocate memory for the internal state */
state = kzalloc(sizeof (struct mt312_state), GFP_KERNEL);
if (state == NULL)
goto error;
/* setup the state */
state->config = config;
state->i2c = i2c;
/* check if the demod is there */
if (mt312_readreg(state, ID, &state->id) < 0 )
goto error;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &mt312_ops,
sizeof (struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
switch (state->id) {
case ID_VP310:
strscpy(state->frontend.ops.info.name, "Zarlink VP310 DVB-S" ,
sizeof (state->frontend.ops.info.name));
state->xtal = MT312_PLL_CLK;
state->freq_mult = 9 ;
break ;
case ID_MT312:
strscpy(state->frontend.ops.info.name, "Zarlink MT312 DVB-S" ,
sizeof (state->frontend.ops.info.name));
state->xtal = MT312_PLL_CLK;
state->freq_mult = 6 ;
break ;
case ID_ZL10313:
strscpy(state->frontend.ops.info.name, "Zarlink ZL10313 DVB-S" ,
sizeof (state->frontend.ops.info.name));
state->xtal = MT312_PLL_CLK_10_111;
state->freq_mult = 9 ;
break ;
default :
printk(KERN_WARNING "Only Zarlink VP310/MT312/ZL10313 are supported chips.\n" );
goto error;
}
return &state->frontend;
error:
kfree(state);
return NULL;
}
EXPORT_SYMBOL_GPL(mt312_attach);
module_param(debug, int , 0644 );
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)." );
MODULE_DESCRIPTION("Zarlink VP310/MT312/ZL10313 DVB-S Demodulator driver" );
MODULE_AUTHOR("Andreas Oberritter <obi@linuxtv.org>" );
MODULE_AUTHOR("Matthias Schwarzott <zzam@gentoo.org>" );
MODULE_LICENSE("GPL" );
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