- 根目录:
- drivers
- media
- dvb
- frontends
- cxd2820r_t.c
/*
* Sony CXD2820R demodulator driver
*
* Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "cxd2820r_priv.h"
int cxd2820r_set_frontend_t(struct dvb_frontend *fe)
{
struct cxd2820r_priv *priv = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret, i, bw_i;
u32 if_freq, if_ctl;
u64 num;
u8 buf[3], bw_param;
u8 bw_params1[][5] = {
{ 0x17, 0xea, 0xaa, 0xaa, 0xaa }, /* 6 MHz */
{ 0x14, 0x80, 0x00, 0x00, 0x00 }, /* 7 MHz */
{ 0x11, 0xf0, 0x00, 0x00, 0x00 }, /* 8 MHz */
};
u8 bw_params2[][2] = {
{ 0x1f, 0xdc }, /* 6 MHz */
{ 0x12, 0xf8 }, /* 7 MHz */
{ 0x01, 0xe0 }, /* 8 MHz */
};
struct reg_val_mask tab[] = {
{ 0x00080, 0x00, 0xff },
{ 0x00081, 0x03, 0xff },
{ 0x00085, 0x07, 0xff },
{ 0x00088, 0x01, 0xff },
{ 0x00070, priv->cfg.ts_mode, 0xff },
{ 0x000cb, priv->cfg.if_agc_polarity << 6, 0x40 },
{ 0x000a5, 0x00, 0x01 },
{ 0x00082, 0x20, 0x60 },
{ 0x000c2, 0xc3, 0xff },
{ 0x0016a, 0x50, 0xff },
{ 0x00427, 0x41, 0xff },
};
dbg("%s: RF=%d BW=%d", __func__, c->frequency, c->bandwidth_hz);
switch (c->bandwidth_hz) {
case 6000000:
bw_i = 0;
bw_param = 2;
break;
case 7000000:
bw_i = 1;
bw_param = 1;
break;
case 8000000:
bw_i = 2;
bw_param = 0;
break;
default:
return -EINVAL;
}
/* update GPIOs */
ret = cxd2820r_gpio(fe);
if (ret)
goto error;
/* program tuner */
if (fe->ops.tuner_ops.set_params)
fe->ops.tuner_ops.set_params(fe);
if (priv->delivery_system != SYS_DVBT) {
for (i = 0; i < ARRAY_SIZE(tab); i++) {
ret = cxd2820r_wr_reg_mask(priv, tab[i].reg,
tab[i].val, tab[i].mask);
if (ret)
goto error;
}
}
priv->delivery_system = SYS_DVBT;
priv->ber_running = 0; /* tune stops BER counter */
/* program IF frequency */
if (fe->ops.tuner_ops.get_if_frequency) {
ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
if (ret)
goto error;
} else
if_freq = 0;
dbg("%s: if_freq=%d", __func__, if_freq);
num = if_freq / 1000; /* Hz => kHz */
num *= 0x1000000;
if_ctl = cxd2820r_div_u64_round_closest(num, 41000);
buf[0] = ((if_ctl >> 16) & 0xff);
buf[1] = ((if_ctl >> 8) & 0xff);
buf[2] = ((if_ctl >> 0) & 0xff);
ret = cxd2820r_wr_regs(priv, 0x000b6, buf, 3);
if (ret)
goto error;
ret = cxd2820r_wr_regs(priv, 0x0009f, bw_params1[bw_i], 5);
if (ret)
goto error;
ret = cxd2820r_wr_reg_mask(priv, 0x000d7, bw_param << 6, 0xc0);
if (ret)
goto error;
ret = cxd2820r_wr_regs(priv, 0x000d9, bw_params2[bw_i], 2);
if (ret)
goto error;
ret = cxd2820r_wr_reg(priv, 0x000ff, 0x08);
if (ret)
goto error;
ret = cxd2820r_wr_reg(priv, 0x000fe, 0x01);
if (ret)
goto error;
return ret;
error:
dbg("%s: failed:%d", __func__, ret);
return ret;
}
int cxd2820r_get_frontend_t(struct dvb_frontend *fe)
{
struct cxd2820r_priv *priv = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
u8 buf[2];
ret = cxd2820r_rd_regs(priv, 0x0002f, buf, sizeof(buf));
if (ret)
goto error;
switch ((buf[0] >> 6) & 0x03) {
case 0:
c->modulation = QPSK;
break;
case 1:
c->modulation = QAM_16;
break;
case 2:
c->modulation = QAM_64;
break;
}
switch ((buf[1] >> 1) & 0x03) {
case 0:
c->transmission_mode = TRANSMISSION_MODE_2K;
break;
case 1:
c->transmission_mode = TRANSMISSION_MODE_8K;
break;
}
switch ((buf[1] >> 3) & 0x03) {
case 0:
c->guard_interval = GUARD_INTERVAL_1_32;
break;
case 1:
c->guard_interval = GUARD_INTERVAL_1_16;
break;
case 2:
c->guard_interval = GUARD_INTERVAL_1_8;
break;
case 3:
c->guard_interval = GUARD_INTERVAL_1_4;
break;
}
switch ((buf[0] >> 3) & 0x07) {
case 0:
c->hierarchy = HIERARCHY_NONE;
break;
case 1:
c->hierarchy = HIERARCHY_1;
break;
case 2:
c->hierarchy = HIERARCHY_2;
break;
case 3:
c->hierarchy = HIERARCHY_4;
break;
}
switch ((buf[0] >> 0) & 0x07) {
case 0:
c->code_rate_HP = FEC_1_2;
break;
case 1:
c->code_rate_HP = FEC_2_3;
break;
case 2:
c->code_rate_HP = FEC_3_4;
break;
case 3:
c->code_rate_HP = FEC_5_6;
break;
case 4:
c->code_rate_HP = FEC_7_8;
break;
}
switch ((buf[1] >> 5) & 0x07) {
case 0:
c->code_rate_LP = FEC_1_2;
break;
case 1:
c->code_rate_LP = FEC_2_3;
break;
case 2:
c->code_rate_LP = FEC_3_4;
break;
case 3:
c->code_rate_LP = FEC_5_6;
break;
case 4:
c->code_rate_LP = FEC_7_8;
break;
}
ret = cxd2820r_rd_reg(priv, 0x007c6, &buf[0]);
if (ret)
goto error;
switch ((buf[0] >> 0) & 0x01) {
case 0:
c->inversion = INVERSION_OFF;
break;
case 1:
c->inversion = INVERSION_ON;
break;
}
return ret;
error:
dbg("%s: failed:%d", __func__, ret);
return ret;
}
int cxd2820r_read_ber_t(struct dvb_frontend *fe, u32 *ber)
{
struct cxd2820r_priv *priv = fe->demodulator_priv;
int ret;
u8 buf[3], start_ber = 0;
*ber = 0;
if (priv->ber_running) {
ret = cxd2820r_rd_regs(priv, 0x00076, buf, sizeof(buf));
if (ret)
goto error;
if ((buf[2] >> 7) & 0x01 || (buf[2] >> 4) & 0x01) {
*ber = (buf[2] & 0x0f) << 16 | buf[1] << 8 | buf[0];
start_ber = 1;
}
} else {
priv->ber_running = 1;
start_ber = 1;
}
if (start_ber) {
/* (re)start BER */
ret = cxd2820r_wr_reg(priv, 0x00079, 0x01);
if (ret)
goto error;
}
return ret;
error:
dbg("%s: failed:%d", __func__, ret);
return ret;
}
int cxd2820r_read_signal_strength_t(struct dvb_frontend *fe,
u16 *strength)
{
struct cxd2820r_priv *priv = fe->demodulator_priv;
int ret;
u8 buf[2];
u16 tmp;
ret = cxd2820r_rd_regs(priv, 0x00026, buf, sizeof(buf));
if (ret)
goto error;
tmp = (buf[0] & 0x0f) << 8 | buf[1];
tmp = ~tmp & 0x0fff;
/* scale value to 0x0000-0xffff from 0x0000-0x0fff */
*strength = tmp * 0xffff / 0x0fff;
return ret;
error:
dbg("%s: failed:%d", __func__, ret);
return ret;
}
int cxd2820r_read_snr_t(struct dvb_frontend *fe, u16 *snr)
{
struct cxd2820r_priv *priv = fe->demodulator_priv;
int ret;
u8 buf[2];
u16 tmp;
/* report SNR in dB * 10 */
ret = cxd2820r_rd_regs(priv, 0x00028, buf, sizeof(buf));
if (ret)
goto error;
tmp = (buf[0] & 0x1f) << 8 | buf[1];
#define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
if (tmp)
*snr = (intlog10(tmp) - CXD2820R_LOG10_8_24) / ((1 << 24)
/ 100);
else
*snr = 0;
dbg("%s: dBx10=%d val=%04x", __func__, *snr, tmp);
return ret;
error:
dbg("%s: failed:%d", __func__, ret);
return ret;
}
int cxd2820r_read_ucblocks_t(struct dvb_frontend *fe, u32 *ucblocks)
{
*ucblocks = 0;
/* no way to read ? */
return 0;
}
int cxd2820r_read_status_t(struct dvb_frontend *fe, fe_status_t *status)
{
struct cxd2820r_priv *priv = fe->demodulator_priv;
int ret;
u8 buf[4];
*status = 0;
ret = cxd2820r_rd_reg(priv, 0x00010, &buf[0]);
if (ret)
goto error;
if ((buf[0] & 0x07) == 6) {
ret = cxd2820r_rd_reg(priv, 0x00073, &buf[1]);
if (ret)
goto error;
if (((buf[1] >> 3) & 0x01) == 1) {
*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
} else {
*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
FE_HAS_VITERBI | FE_HAS_SYNC;
}
} else {
ret = cxd2820r_rd_reg(priv, 0x00014, &buf[2]);
if (ret)
goto error;
if ((buf[2] & 0x0f) >= 4) {
ret = cxd2820r_rd_reg(priv, 0x00a14, &buf[3]);
if (ret)
goto error;
if (((buf[3] >> 4) & 0x01) == 1)
*status |= FE_HAS_SIGNAL;
}
}
dbg("%s: lock=%02x %02x %02x %02x", __func__,
buf[0], buf[1], buf[2], buf[3]);
return ret;
error:
dbg("%s: failed:%d", __func__, ret);
return ret;
}
int cxd2820r_init_t(struct dvb_frontend *fe)
{
struct cxd2820r_priv *priv = fe->demodulator_priv;
int ret;
ret = cxd2820r_wr_reg(priv, 0x00085, 0x07);
if (ret)
goto error;
return ret;
error:
dbg("%s: failed:%d", __func__, ret);
return ret;
}
int cxd2820r_sleep_t(struct dvb_frontend *fe)
{
struct cxd2820r_priv *priv = fe->demodulator_priv;
int ret, i;
struct reg_val_mask tab[] = {
{ 0x000ff, 0x1f, 0xff },
{ 0x00085, 0x00, 0xff },
{ 0x00088, 0x01, 0xff },
{ 0x00081, 0x00, 0xff },
{ 0x00080, 0x00, 0xff },
};
dbg("%s", __func__);
priv->delivery_system = SYS_UNDEFINED;
for (i = 0; i < ARRAY_SIZE(tab); i++) {
ret = cxd2820r_wr_reg_mask(priv, tab[i].reg, tab[i].val,
tab[i].mask);
if (ret)
goto error;
}
return ret;
error:
dbg("%s: failed:%d", __func__, ret);
return ret;
}
int cxd2820r_get_tune_settings_t(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *s)
{
s->min_delay_ms = 500;
s->step_size = fe->ops.info.frequency_stepsize * 2;
s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
return 0;
}