diff options
Diffstat (limited to 'drivers/media/dvb/frontends/hd29l2.c')
| -rw-r--r-- | drivers/media/dvb/frontends/hd29l2.c | 861 |
1 files changed, 0 insertions, 861 deletions
diff --git a/drivers/media/dvb/frontends/hd29l2.c b/drivers/media/dvb/frontends/hd29l2.c deleted file mode 100644 index a0031819083..00000000000 --- a/drivers/media/dvb/frontends/hd29l2.c +++ /dev/null @@ -1,861 +0,0 @@ -/* - * 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"); |