diff options
Diffstat (limited to 'drivers/media/dvb-frontends/cxd2820r_t.c')
| -rw-r--r-- | drivers/media/dvb-frontends/cxd2820r_t.c | 452 |
1 files changed, 452 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/cxd2820r_t.c b/drivers/media/dvb-frontends/cxd2820r_t.c new file mode 100644 index 000000000000..e5dd22bc16be --- /dev/null +++ b/drivers/media/dvb-frontends/cxd2820r_t.c @@ -0,0 +1,452 @@ +/* + * 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=%*ph", __func__, 4, buf); + + 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; +} |
