/* * 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_c(struct dvb_frontend *fe) { struct cxd2820r_priv *priv = fe->demodulator_priv; struct dtv_frontend_properties *c = &fe->dtv_property_cache; int ret, i; u8 buf[2]; u32 if_freq; u16 if_ctl; u64 num; struct reg_val_mask tab[] = { { 0x00080, 0x01, 0xff }, { 0x00081, 0x05, 0xff }, { 0x00085, 0x07, 0xff }, { 0x00088, 0x01, 0xff }, { 0x00082, 0x20, 0x60 }, { 0x1016a, 0x48, 0xff }, { 0x100a5, 0x00, 0x01 }, { 0x10020, 0x06, 0x07 }, { 0x10059, 0x50, 0xff }, { 0x10087, 0x0c, 0x3c }, { 0x1008b, 0x07, 0xff }, { 0x1001f, priv->cfg.if_agc_polarity << 7, 0x80 }, { 0x10070, priv->cfg.ts_mode, 0xff }, }; dbg("%s: RF=%d SR=%d", __func__, c->frequency, c->symbol_rate); /* 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_DVBC_ANNEX_A) { 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_DVBC_ANNEX_A; 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 *= 0x4000; if_ctl = cxd2820r_div_u64_round_closest(num, 41000); buf[0] = (if_ctl >> 8) & 0x3f; buf[1] = (if_ctl >> 0) & 0xff; ret = cxd2820r_wr_regs(priv, 0x10042, buf, 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_c(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, 0x1001a, buf, 2); if (ret) goto error; c->symbol_rate = 2500 * ((buf[0] & 0x0f) << 8 | buf[1]); ret = cxd2820r_rd_reg(priv, 0x10019, &buf[0]); if (ret) goto error; switch ((buf[0] >> 0) & 0x03) { case 0: c->modulation = QAM_16; break; case 1: c->modulation = QAM_32; break; case 2: c->modulation = QAM_64; break; case 3: c->modulation = QAM_128; break; case 4: c->modulation = QAM_256; break; } switch ((buf[0] >> 7) & 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_c(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, 0x10076, 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, 0x10079, 0x01); if (ret) goto error; } return ret; error: dbg("%s: failed:%d", __func__, ret); return ret; } int cxd2820r_read_signal_strength_c(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, 0x10049, buf, sizeof(buf)); if (ret) goto error; tmp = (buf[0] & 0x03) << 8 | buf[1]; tmp = (~tmp & 0x03ff); if (tmp == 512) /* ~no signal */ tmp = 0; else if (tmp > 350) tmp = 350; /* scale value to 0x0000-0xffff */ *strength = tmp * 0xffff / (350-0); return ret; error: dbg("%s: failed:%d", __func__, ret); return ret; } int cxd2820r_read_snr_c(struct dvb_frontend *fe, u16 *snr) { struct cxd2820r_priv *priv = fe->demodulator_priv; int ret; u8 tmp; unsigned int A, B; /* report SNR in dB * 10 */ ret = cxd2820r_rd_reg(priv, 0x10019, &tmp); if (ret) goto error; if (((tmp >> 0) & 0x03) % 2) { A = 875; B = 650; } else { A = 950; B = 760; } ret = cxd2820r_rd_reg(priv, 0x1004d, &tmp); if (ret) goto error; #define CXD2820R_LOG2_E_24 24204406 /* log2(e) << 24 */ if (tmp) *snr = A * (intlog2(B / tmp) >> 5) / (CXD2820R_LOG2_E_24 >> 5) / 10; else *snr = 0; return ret; error: dbg("%s: failed:%d", __func__, ret); return ret; } int cxd2820r_read_ucblocks_c(struct dvb_frontend *fe, u32 *ucblocks) { *ucblocks = 0; /* no way to read ? */ return 0; } int cxd2820r_read_status_c(struct dvb_frontend *fe, fe_status_t *status) { struct cxd2820r_priv *priv = fe->demodulator_priv; int ret; u8 buf[2]; *status = 0; ret = cxd2820r_rd_regs(priv, 0x10088, buf, sizeof(buf)); if (ret) goto error; if (((buf[0] >> 0) & 0x01) == 1) { *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC; if (((buf[1] >> 3) & 0x01) == 1) { *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; } } dbg("%s: lock=%02x %02x", __func__, buf[0], buf[1]); return ret; error: dbg("%s: failed:%d", __func__, ret); return ret; } int cxd2820r_init_c(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_c(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_c(struct dvb_frontend *fe, struct dvb_frontend_tune_settings *s) { s->min_delay_ms = 500; s->step_size = 0; /* no zigzag */ s->max_drift = 0; return 0; }