diff options
Diffstat (limited to 'drivers/media/dvb-frontends/hd29l2.c')
| -rw-r--r-- | drivers/media/dvb-frontends/hd29l2.c | 861 |
1 files changed, 861 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/hd29l2.c b/drivers/media/dvb-frontends/hd29l2.c new file mode 100644 index 00000000000..a0031819083 --- /dev/null +++ b/drivers/media/dvb-frontends/hd29l2.c @@ -0,0 +1,861 @@ +/* + * HDIC HD29L2 DMB-TH demodulator driver + * + * Copyright (C) 2011 Metropolia University of Applied Sciences, Electria R&D + * + * Author: 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "hd29l2_priv.h" + +int hd29l2_debug; +module_param_named(debug, hd29l2_debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); + +/* write multiple registers */ +static int hd29l2_wr_regs(struct hd29l2_priv *priv, u8 reg, u8 *val, int len) +{ + int ret; + u8 buf[2 + len]; + struct i2c_msg msg[1] = { + { + .addr = priv->cfg.i2c_addr, + .flags = 0, + .len = sizeof(buf), + .buf = buf, + } + }; + + buf[0] = 0x00; + buf[1] = reg; + memcpy(&buf[2], val, len); + + ret = i2c_transfer(priv->i2c, msg, 1); + if (ret == 1) { + ret = 0; + } else { + warn("i2c wr failed=%d reg=%02x len=%d", ret, reg, len); + ret = -EREMOTEIO; + } + + return ret; +} + +/* read multiple registers */ +static int hd29l2_rd_regs(struct hd29l2_priv *priv, u8 reg, u8 *val, int len) +{ + int ret; + u8 buf[2] = { 0x00, reg }; + struct i2c_msg msg[2] = { + { + .addr = priv->cfg.i2c_addr, + .flags = 0, + .len = 2, + .buf = buf, + }, { + .addr = priv->cfg.i2c_addr, + .flags = I2C_M_RD, + .len = len, + .buf = val, + } + }; + + ret = i2c_transfer(priv->i2c, msg, 2); + if (ret == 2) { + ret = 0; + } else { + warn("i2c rd failed=%d reg=%02x len=%d", ret, reg, len); + ret = -EREMOTEIO; + } + + return ret; +} + +/* write single register */ +static int hd29l2_wr_reg(struct hd29l2_priv *priv, u8 reg, u8 val) +{ + return hd29l2_wr_regs(priv, reg, &val, 1); +} + +/* read single register */ +static int hd29l2_rd_reg(struct hd29l2_priv *priv, u8 reg, u8 *val) +{ + return hd29l2_rd_regs(priv, reg, val, 1); +} + +/* write single register with mask */ +static int hd29l2_wr_reg_mask(struct hd29l2_priv *priv, u8 reg, u8 val, u8 mask) +{ + int ret; + u8 tmp; + + /* no need for read if whole reg is written */ + if (mask != 0xff) { + ret = hd29l2_rd_regs(priv, reg, &tmp, 1); + if (ret) + return ret; + + val &= mask; + tmp &= ~mask; + val |= tmp; + } + + return hd29l2_wr_regs(priv, reg, &val, 1); +} + +/* read single register with mask */ +int hd29l2_rd_reg_mask(struct hd29l2_priv *priv, u8 reg, u8 *val, u8 mask) +{ + int ret, i; + u8 tmp; + + ret = hd29l2_rd_regs(priv, reg, &tmp, 1); + if (ret) + return ret; + + tmp &= mask; + + /* find position of the first bit */ + for (i = 0; i < 8; i++) { + if ((mask >> i) & 0x01) + break; + } + *val = tmp >> i; + + return 0; +} + +static int hd29l2_soft_reset(struct hd29l2_priv *priv) +{ + int ret; + u8 tmp; + + ret = hd29l2_rd_reg(priv, 0x26, &tmp); + if (ret) + goto err; + + ret = hd29l2_wr_reg(priv, 0x26, 0x0d); + if (ret) + goto err; + + usleep_range(10000, 20000); + + ret = hd29l2_wr_reg(priv, 0x26, tmp); + if (ret) + goto err; + + return 0; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int hd29l2_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) +{ + int ret, i; + struct hd29l2_priv *priv = fe->demodulator_priv; + u8 tmp; + + dbg("%s: enable=%d", __func__, enable); + + /* set tuner address for demod */ + if (!priv->tuner_i2c_addr_programmed && enable) { + /* no need to set tuner address every time, once is enough */ + ret = hd29l2_wr_reg(priv, 0x9d, priv->cfg.tuner_i2c_addr << 1); + if (ret) + goto err; + + priv->tuner_i2c_addr_programmed = true; + } + + /* open / close gate */ + ret = hd29l2_wr_reg(priv, 0x9f, enable); + if (ret) + goto err; + + /* wait demod ready */ + for (i = 10; i; i--) { + ret = hd29l2_rd_reg(priv, 0x9e, &tmp); + if (ret) + goto err; + + if (tmp == enable) + break; + + usleep_range(5000, 10000); + } + + dbg("%s: loop=%d", __func__, i); + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int hd29l2_read_status(struct dvb_frontend *fe, fe_status_t *status) +{ + int ret; + struct hd29l2_priv *priv = fe->demodulator_priv; + u8 buf[2]; + + *status = 0; + + ret = hd29l2_rd_reg(priv, 0x05, &buf[0]); + if (ret) + goto err; + + if (buf[0] & 0x01) { + /* full lock */ + *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | + FE_HAS_SYNC | FE_HAS_LOCK; + } else { + ret = hd29l2_rd_reg(priv, 0x0d, &buf[1]); + if (ret) + goto err; + + if ((buf[1] & 0xfe) == 0x78) + /* partial lock */ + *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI | FE_HAS_SYNC; + } + + priv->fe_status = *status; + + return 0; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int hd29l2_read_snr(struct dvb_frontend *fe, u16 *snr) +{ + int ret; + struct hd29l2_priv *priv = fe->demodulator_priv; + u8 buf[2]; + u16 tmp; + + if (!(priv->fe_status & FE_HAS_LOCK)) { + *snr = 0; + ret = 0; + goto err; + } + + ret = hd29l2_rd_regs(priv, 0x0b, buf, 2); + if (ret) + goto err; + + tmp = (buf[0] << 8) | buf[1]; + + /* report SNR in dB * 10 */ + #define LOG10_20736_24 72422627 /* log10(20736) << 24 */ + if (tmp) + *snr = (LOG10_20736_24 - intlog10(tmp)) / ((1 << 24) / 100); + else + *snr = 0; + + return 0; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int hd29l2_read_signal_strength(struct dvb_frontend *fe, u16 *strength) +{ + int ret; + struct hd29l2_priv *priv = fe->demodulator_priv; + u8 buf[2]; + u16 tmp; + + *strength = 0; + + ret = hd29l2_rd_regs(priv, 0xd5, buf, 2); + if (ret) + goto err; + + tmp = buf[0] << 8 | buf[1]; + tmp = ~tmp & 0x0fff; + + /* scale value to 0x0000-0xffff from 0x0000-0x0fff */ + *strength = tmp * 0xffff / 0x0fff; + + return 0; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int hd29l2_read_ber(struct dvb_frontend *fe, u32 *ber) +{ + int ret; + struct hd29l2_priv *priv = fe->demodulator_priv; + u8 buf[2]; + + if (!(priv->fe_status & FE_HAS_SYNC)) { + *ber = 0; + ret = 0; + goto err; + } + + ret = hd29l2_rd_regs(priv, 0xd9, buf, 2); + if (ret) { + *ber = 0; + goto err; + } + + /* LDPC BER */ + *ber = ((buf[0] & 0x0f) << 8) | buf[1]; + + return 0; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int hd29l2_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) +{ + /* no way to read? */ + *ucblocks = 0; + return 0; +} + +static enum dvbfe_search hd29l2_search(struct dvb_frontend *fe) +{ + int ret, i; + struct hd29l2_priv *priv = fe->demodulator_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + u8 tmp, buf[3]; + u8 modulation, carrier, guard_interval, interleave, code_rate; + u64 num64; + u32 if_freq, if_ctl; + bool auto_mode; + + dbg("%s: delivery_system=%d frequency=%d bandwidth_hz=%d " \ + "modulation=%d inversion=%d fec_inner=%d guard_interval=%d", + __func__, + c->delivery_system, c->frequency, c->bandwidth_hz, + c->modulation, c->inversion, c->fec_inner, c->guard_interval); + + /* as for now we detect always params automatically */ + auto_mode = true; + + /* program tuner */ + if (fe->ops.tuner_ops.set_params) + fe->ops.tuner_ops.set_params(fe); + + /* get and program IF */ + if (fe->ops.tuner_ops.get_if_frequency) + fe->ops.tuner_ops.get_if_frequency(fe, &if_freq); + else + if_freq = 0; + + if (if_freq) { + /* normal IF */ + + /* calc IF control value */ + num64 = if_freq; + num64 *= 0x800000; + num64 = div_u64(num64, HD29L2_XTAL); + num64 -= 0x800000; + if_ctl = num64; + + tmp = 0xfc; /* tuner type normal */ + } else { + /* zero IF */ + if_ctl = 0; + tmp = 0xfe; /* tuner type Zero-IF */ + } + + buf[0] = ((if_ctl >> 0) & 0xff); + buf[1] = ((if_ctl >> 8) & 0xff); + buf[2] = ((if_ctl >> 16) & 0xff); + + /* program IF control */ + ret = hd29l2_wr_regs(priv, 0x14, buf, 3); + if (ret) + goto err; + + /* program tuner type */ + ret = hd29l2_wr_reg(priv, 0xab, tmp); + if (ret) + goto err; + + dbg("%s: if_freq=%d if_ctl=%x", __func__, if_freq, if_ctl); + + if (auto_mode) { + /* + * use auto mode + */ + + /* disable quick mode */ + ret = hd29l2_wr_reg_mask(priv, 0xac, 0 << 7, 0x80); + if (ret) + goto err; + + ret = hd29l2_wr_reg_mask(priv, 0x82, 1 << 1, 0x02); + if (ret) + goto err; + + /* enable auto mode */ + ret = hd29l2_wr_reg_mask(priv, 0x7d, 1 << 6, 0x40); + if (ret) + goto err; + + ret = hd29l2_wr_reg_mask(priv, 0x81, 1 << 3, 0x08); + if (ret) + goto err; + + /* soft reset */ + ret = hd29l2_soft_reset(priv); + if (ret) + goto err; + + /* detect modulation */ + for (i = 30; i; i--) { + msleep(100); + + ret = hd29l2_rd_reg(priv, 0x0d, &tmp); + if (ret) + goto err; + + if ((((tmp & 0xf0) >= 0x10) && + ((tmp & 0x0f) == 0x08)) || (tmp >= 0x2c)) + break; + } + + dbg("%s: loop=%d", __func__, i); + + if (i == 0) + /* detection failed */ + return DVBFE_ALGO_SEARCH_FAILED; + + /* read modulation */ + ret = hd29l2_rd_reg_mask(priv, 0x7d, &modulation, 0x07); + if (ret) + goto err; + } else { + /* + * use manual mode + */ + + modulation = HD29L2_QAM64; + carrier = HD29L2_CARRIER_MULTI; + guard_interval = HD29L2_PN945; + interleave = HD29L2_INTERLEAVER_420; + code_rate = HD29L2_CODE_RATE_08; + + tmp = (code_rate << 3) | modulation; + ret = hd29l2_wr_reg_mask(priv, 0x7d, tmp, 0x5f); + if (ret) + goto err; + + tmp = (carrier << 2) | guard_interval; + ret = hd29l2_wr_reg_mask(priv, 0x81, tmp, 0x0f); + if (ret) + goto err; + + tmp = interleave; + ret = hd29l2_wr_reg_mask(priv, 0x82, tmp, 0x03); + if (ret) + goto err; + } + + /* ensure modulation validy */ + /* 0=QAM4_NR, 1=QAM4, 2=QAM16, 3=QAM32, 4=QAM64 */ + if (modulation > (ARRAY_SIZE(reg_mod_vals_tab[0].val) - 1)) { + dbg("%s: modulation=%d not valid", __func__, modulation); + goto err; + } + + /* program registers according to modulation */ + for (i = 0; i < ARRAY_SIZE(reg_mod_vals_tab); i++) { + ret = hd29l2_wr_reg(priv, reg_mod_vals_tab[i].reg, + reg_mod_vals_tab[i].val[modulation]); + if (ret) + goto err; + } + + /* read guard interval */ + ret = hd29l2_rd_reg_mask(priv, 0x81, &guard_interval, 0x03); + if (ret) + goto err; + + /* read carrier mode */ + ret = hd29l2_rd_reg_mask(priv, 0x81, &carrier, 0x04); + if (ret) + goto err; + + dbg("%s: modulation=%d guard_interval=%d carrier=%d", + __func__, modulation, guard_interval, carrier); + + if ((carrier == HD29L2_CARRIER_MULTI) && (modulation == HD29L2_QAM64) && + (guard_interval == HD29L2_PN945)) { + dbg("%s: C=3780 && QAM64 && PN945", __func__); + + ret = hd29l2_wr_reg(priv, 0x42, 0x33); + if (ret) + goto err; + + ret = hd29l2_wr_reg(priv, 0xdd, 0x01); + if (ret) + goto err; + } + + usleep_range(10000, 20000); + + /* soft reset */ + ret = hd29l2_soft_reset(priv); + if (ret) + goto err; + + /* wait demod lock */ + for (i = 30; i; i--) { + msleep(100); + + /* read lock bit */ + ret = hd29l2_rd_reg_mask(priv, 0x05, &tmp, 0x01); + if (ret) + goto err; + + if (tmp) + break; + } + + dbg("%s: loop=%d", __func__, i); + + if (i == 0) + return DVBFE_ALGO_SEARCH_AGAIN; + + return DVBFE_ALGO_SEARCH_SUCCESS; +err: + dbg("%s: failed=%d", __func__, ret); + return DVBFE_ALGO_SEARCH_ERROR; +} + +static int hd29l2_get_frontend_algo(struct dvb_frontend *fe) +{ + return DVBFE_ALGO_CUSTOM; +} + +static int hd29l2_get_frontend(struct dvb_frontend *fe) +{ + int ret; + struct hd29l2_priv *priv = fe->demodulator_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + u8 buf[3]; + u32 if_ctl; + char *str_constellation, *str_code_rate, *str_constellation_code_rate, + *str_guard_interval, *str_carrier, *str_guard_interval_carrier, + *str_interleave, *str_interleave_; + + ret = hd29l2_rd_reg(priv, 0x7d, &buf[0]); + if (ret) + goto err; + + ret = hd29l2_rd_regs(priv, 0x81, &buf[1], 2); + if (ret) + goto err; + + /* constellation, 0x7d[2:0] */ + switch ((buf[0] >> 0) & 0x07) { + case 0: /* QAM4NR */ + str_constellation = "QAM4NR"; + c->modulation = QAM_AUTO; /* FIXME */ + break; + case 1: /* QAM4 */ + str_constellation = "QAM4"; + c->modulation = QPSK; /* FIXME */ + break; + case 2: + str_constellation = "QAM16"; + c->modulation = QAM_16; + break; + case 3: + str_constellation = "QAM32"; + c->modulation = QAM_32; + break; + case 4: + str_constellation = "QAM64"; + c->modulation = QAM_64; + break; + default: + str_constellation = "?"; + } + + /* LDPC code rate, 0x7d[4:3] */ + switch ((buf[0] >> 3) & 0x03) { + case 0: /* 0.4 */ + str_code_rate = "0.4"; + c->fec_inner = FEC_AUTO; /* FIXME */ + break; + case 1: /* 0.6 */ + str_code_rate = "0.6"; + c->fec_inner = FEC_3_5; + break; + case 2: /* 0.8 */ + str_code_rate = "0.8"; + c->fec_inner = FEC_4_5; + break; + default: + str_code_rate = "?"; + } + + /* constellation & code rate set, 0x7d[6] */ + switch ((buf[0] >> 6) & 0x01) { + case 0: + str_constellation_code_rate = "manual"; + break; + case 1: + str_constellation_code_rate = "auto"; + break; + default: + str_constellation_code_rate = "?"; + } + + /* frame header, 0x81[1:0] */ + switch ((buf[1] >> 0) & 0x03) { + case 0: /* PN945 */ + str_guard_interval = "PN945"; + c->guard_interval = GUARD_INTERVAL_AUTO; /* FIXME */ + break; + case 1: /* PN595 */ + str_guard_interval = "PN595"; + c->guard_interval = GUARD_INTERVAL_AUTO; /* FIXME */ + break; + case 2: /* PN420 */ + str_guard_interval = "PN420"; + c->guard_interval = GUARD_INTERVAL_AUTO; /* FIXME */ + break; + default: + str_guard_interval = "?"; + } + + /* carrier, 0x81[2] */ + switch ((buf[1] >> 2) & 0x01) { + case 0: + str_carrier = "C=1"; + break; + case 1: + str_carrier = "C=3780"; + break; + default: + str_carrier = "?"; + } + + /* frame header & carrier set, 0x81[3] */ + switch ((buf[1] >> 3) & 0x01) { + case 0: + str_guard_interval_carrier = "manual"; + break; + case 1: + str_guard_interval_carrier = "auto"; + break; + default: + str_guard_interval_carrier = "?"; + } + + /* interleave, 0x82[0] */ + switch ((buf[2] >> 0) & 0x01) { + case 0: + str_interleave = "M=720"; + break; + case 1: + str_interleave = "M=240"; + break; + default: + str_interleave = "?"; + } + + /* interleave set, 0x82[1] */ + switch ((buf[2] >> 1) & 0x01) { + case 0: + str_interleave_ = "manual"; + break; + case 1: + str_interleave_ = "auto"; + break; + default: + str_interleave_ = "?"; + } + + /* + * We can read out current detected NCO and use that value next + * time instead of calculating new value from targed IF. + * I think it will not effect receiver sensitivity but gaining lock + * after tune could be easier... + */ + ret = hd29l2_rd_regs(priv, 0xb1, &buf[0], 3); + if (ret) + goto err; + + if_ctl = (buf[0] << 16) | ((buf[1] - 7) << 8) | buf[2]; + + dbg("%s: %s %s %s | %s %s %s | %s %s | NCO=%06x", __func__, + str_constellation, str_code_rate, str_constellation_code_rate, + str_guard_interval, str_carrier, str_guard_interval_carrier, + str_interleave, str_interleave_, if_ctl); + + return 0; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static int hd29l2_init(struct dvb_frontend *fe) +{ + int ret, i; + struct hd29l2_priv *priv = fe->demodulator_priv; + u8 tmp; + static const struct reg_val tab[] = { + { 0x3a, 0x06 }, + { 0x3b, 0x03 }, + { 0x3c, 0x04 }, + { 0xaf, 0x06 }, + { 0xb0, 0x1b }, + { 0x80, 0x64 }, + { 0x10, 0x38 }, + }; + + dbg("%s:", __func__); + + /* reset demod */ + /* it is recommended to HW reset chip using RST_N pin */ + if (fe->callback) { + ret = fe->callback(fe, DVB_FRONTEND_COMPONENT_DEMOD, 0, 0); + if (ret) + goto err; + + /* reprogramming needed because HW reset clears registers */ + priv->tuner_i2c_addr_programmed = false; + } + + /* init */ + for (i = 0; i < ARRAY_SIZE(tab); i++) { + ret = hd29l2_wr_reg(priv, tab[i].reg, tab[i].val); + if (ret) + goto err; + } + + /* TS params */ + ret = hd29l2_rd_reg(priv, 0x36, &tmp); + if (ret) + goto err; + + tmp &= 0x1b; + tmp |= priv->cfg.ts_mode; + ret = hd29l2_wr_reg(priv, 0x36, tmp); + if (ret) + goto err; + + ret = hd29l2_rd_reg(priv, 0x31, &tmp); + tmp &= 0xef; + + if (!(priv->cfg.ts_mode >> 7)) + /* set b4 for serial TS */ + tmp |= 0x10; + + ret = hd29l2_wr_reg(priv, 0x31, tmp); + if (ret) + goto err; + + return ret; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + +static void hd29l2_release(struct dvb_frontend *fe) +{ + struct hd29l2_priv *priv = fe->demodulator_priv; + kfree(priv); +} + +static struct dvb_frontend_ops hd29l2_ops; + +struct dvb_frontend *hd29l2_attach(const struct hd29l2_config *config, + struct i2c_adapter *i2c) +{ + int ret; + struct hd29l2_priv *priv = NULL; + u8 tmp; + + /* allocate memory for the internal state */ + priv = kzalloc(sizeof(struct hd29l2_priv), GFP_KERNEL); + if (priv == NULL) + goto err; + + /* setup the state */ + priv->i2c = i2c; + memcpy(&priv->cfg, config, sizeof(struct hd29l2_config)); + + + /* check if the demod is there */ + ret = hd29l2_rd_reg(priv, 0x00, &tmp); + if (ret) + goto err; + + /* create dvb_frontend */ + memcpy(&priv->fe.ops, &hd29l2_ops, sizeof(struct dvb_frontend_ops)); + priv->fe.demodulator_priv = priv; + + return &priv->fe; +err: + kfree(priv); + return NULL; +} +EXPORT_SYMBOL(hd29l2_attach); + +static struct dvb_frontend_ops hd29l2_ops = { + .delsys = { SYS_DVBT }, + .info = { + .name = "HDIC HD29L2 DMB-TH", + .frequency_min = 474000000, + .frequency_max = 858000000, + .frequency_stepsize = 10000, + .caps = FE_CAN_FEC_AUTO | + FE_CAN_QPSK | + FE_CAN_QAM_16 | + FE_CAN_QAM_32 | + FE_CAN_QAM_64 | + FE_CAN_QAM_AUTO | + FE_CAN_TRANSMISSION_MODE_AUTO | + FE_CAN_BANDWIDTH_AUTO | + FE_CAN_GUARD_INTERVAL_AUTO | + FE_CAN_HIERARCHY_AUTO | + FE_CAN_RECOVER + }, + + .release = hd29l2_release, + + .init = hd29l2_init, + + .get_frontend_algo = hd29l2_get_frontend_algo, + .search = hd29l2_search, + .get_frontend = hd29l2_get_frontend, + + .read_status = hd29l2_read_status, + .read_snr = hd29l2_read_snr, + .read_signal_strength = hd29l2_read_signal_strength, + .read_ber = hd29l2_read_ber, + .read_ucblocks = hd29l2_read_ucblocks, + + .i2c_gate_ctrl = hd29l2_i2c_gate_ctrl, +}; + +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_DESCRIPTION("HDIC HD29L2 DMB-TH demodulator driver"); +MODULE_LICENSE("GPL"); |