344 lines
7.3 KiB
C
344 lines
7.3 KiB
C
/*
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* Sony CXD2820R demodulator driver
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*
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* Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "cxd2820r_priv.h"
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int cxd2820r_set_frontend_c(struct dvb_frontend *fe)
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{
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struct cxd2820r_priv *priv = fe->demodulator_priv;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int ret, i;
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u8 buf[2];
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u32 if_freq;
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u16 if_ctl;
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u64 num;
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struct reg_val_mask tab[] = {
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{ 0x00080, 0x01, 0xff },
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{ 0x00081, 0x05, 0xff },
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{ 0x00085, 0x07, 0xff },
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{ 0x00088, 0x01, 0xff },
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{ 0x00082, 0x20, 0x60 },
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{ 0x1016a, 0x48, 0xff },
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{ 0x100a5, 0x00, 0x01 },
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{ 0x10020, 0x06, 0x07 },
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{ 0x10059, 0x50, 0xff },
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{ 0x10087, 0x0c, 0x3c },
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{ 0x1008b, 0x07, 0xff },
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{ 0x1001f, priv->cfg.if_agc_polarity << 7, 0x80 },
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{ 0x10070, priv->cfg.ts_mode, 0xff },
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};
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dev_dbg(&priv->i2c->dev, "%s: frequency=%d symbol_rate=%d\n", __func__,
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c->frequency, c->symbol_rate);
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/* program tuner */
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if (fe->ops.tuner_ops.set_params)
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fe->ops.tuner_ops.set_params(fe);
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if (priv->delivery_system != SYS_DVBC_ANNEX_A) {
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for (i = 0; i < ARRAY_SIZE(tab); i++) {
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ret = cxd2820r_wr_reg_mask(priv, tab[i].reg,
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tab[i].val, tab[i].mask);
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if (ret)
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goto error;
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}
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}
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priv->delivery_system = SYS_DVBC_ANNEX_A;
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priv->ber_running = 0; /* tune stops BER counter */
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/* program IF frequency */
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if (fe->ops.tuner_ops.get_if_frequency) {
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ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
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if (ret)
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goto error;
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} else
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if_freq = 0;
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dev_dbg(&priv->i2c->dev, "%s: if_freq=%d\n", __func__, if_freq);
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num = if_freq / 1000; /* Hz => kHz */
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num *= 0x4000;
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if_ctl = 0x4000 - cxd2820r_div_u64_round_closest(num, 41000);
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buf[0] = (if_ctl >> 8) & 0x3f;
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buf[1] = (if_ctl >> 0) & 0xff;
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ret = cxd2820r_wr_regs(priv, 0x10042, buf, 2);
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if (ret)
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goto error;
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ret = cxd2820r_wr_reg(priv, 0x000ff, 0x08);
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if (ret)
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goto error;
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ret = cxd2820r_wr_reg(priv, 0x000fe, 0x01);
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if (ret)
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goto error;
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return ret;
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error:
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dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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int cxd2820r_get_frontend_c(struct dvb_frontend *fe)
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{
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struct cxd2820r_priv *priv = fe->demodulator_priv;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int ret;
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u8 buf[2];
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ret = cxd2820r_rd_regs(priv, 0x1001a, buf, 2);
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if (ret)
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goto error;
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c->symbol_rate = 2500 * ((buf[0] & 0x0f) << 8 | buf[1]);
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ret = cxd2820r_rd_reg(priv, 0x10019, &buf[0]);
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if (ret)
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goto error;
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switch ((buf[0] >> 0) & 0x07) {
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case 0:
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c->modulation = QAM_16;
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break;
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case 1:
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c->modulation = QAM_32;
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break;
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case 2:
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c->modulation = QAM_64;
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break;
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case 3:
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c->modulation = QAM_128;
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break;
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case 4:
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c->modulation = QAM_256;
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break;
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}
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switch ((buf[0] >> 7) & 0x01) {
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case 0:
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c->inversion = INVERSION_OFF;
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break;
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case 1:
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c->inversion = INVERSION_ON;
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break;
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}
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return ret;
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error:
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dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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int cxd2820r_read_ber_c(struct dvb_frontend *fe, u32 *ber)
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{
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struct cxd2820r_priv *priv = fe->demodulator_priv;
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int ret;
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u8 buf[3], start_ber = 0;
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*ber = 0;
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if (priv->ber_running) {
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ret = cxd2820r_rd_regs(priv, 0x10076, buf, sizeof(buf));
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if (ret)
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goto error;
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if ((buf[2] >> 7) & 0x01 || (buf[2] >> 4) & 0x01) {
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*ber = (buf[2] & 0x0f) << 16 | buf[1] << 8 | buf[0];
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start_ber = 1;
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}
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} else {
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priv->ber_running = 1;
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start_ber = 1;
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}
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if (start_ber) {
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/* (re)start BER */
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ret = cxd2820r_wr_reg(priv, 0x10079, 0x01);
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if (ret)
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goto error;
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}
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return ret;
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error:
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dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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int cxd2820r_read_signal_strength_c(struct dvb_frontend *fe,
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u16 *strength)
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{
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struct cxd2820r_priv *priv = fe->demodulator_priv;
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int ret;
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u8 buf[2];
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u16 tmp;
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ret = cxd2820r_rd_regs(priv, 0x10049, buf, sizeof(buf));
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if (ret)
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goto error;
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tmp = (buf[0] & 0x03) << 8 | buf[1];
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tmp = (~tmp & 0x03ff);
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if (tmp == 512)
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/* ~no signal */
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tmp = 0;
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else if (tmp > 350)
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tmp = 350;
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/* scale value to 0x0000-0xffff */
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*strength = tmp * 0xffff / (350-0);
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return ret;
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error:
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dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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int cxd2820r_read_snr_c(struct dvb_frontend *fe, u16 *snr)
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{
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struct cxd2820r_priv *priv = fe->demodulator_priv;
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int ret;
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u8 tmp;
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unsigned int A, B;
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/* report SNR in dB * 10 */
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ret = cxd2820r_rd_reg(priv, 0x10019, &tmp);
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if (ret)
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goto error;
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if (((tmp >> 0) & 0x03) % 2) {
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A = 875;
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B = 650;
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} else {
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A = 950;
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B = 760;
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}
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ret = cxd2820r_rd_reg(priv, 0x1004d, &tmp);
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if (ret)
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goto error;
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#define CXD2820R_LOG2_E_24 24204406 /* log2(e) << 24 */
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if (tmp)
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*snr = A * (intlog2(B / tmp) >> 5) / (CXD2820R_LOG2_E_24 >> 5)
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/ 10;
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else
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*snr = 0;
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return ret;
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error:
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dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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int cxd2820r_read_ucblocks_c(struct dvb_frontend *fe, u32 *ucblocks)
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{
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*ucblocks = 0;
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/* no way to read ? */
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return 0;
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}
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int cxd2820r_read_status_c(struct dvb_frontend *fe, fe_status_t *status)
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{
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struct cxd2820r_priv *priv = fe->demodulator_priv;
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int ret;
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u8 buf[2];
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*status = 0;
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ret = cxd2820r_rd_regs(priv, 0x10088, buf, sizeof(buf));
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if (ret)
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goto error;
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if (((buf[0] >> 0) & 0x01) == 1) {
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*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
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FE_HAS_VITERBI | FE_HAS_SYNC;
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if (((buf[1] >> 3) & 0x01) == 1) {
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*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
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FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
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}
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}
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dev_dbg(&priv->i2c->dev, "%s: lock=%02x %02x\n", __func__, buf[0],
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buf[1]);
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return ret;
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error:
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dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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int cxd2820r_init_c(struct dvb_frontend *fe)
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{
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struct cxd2820r_priv *priv = fe->demodulator_priv;
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int ret;
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ret = cxd2820r_wr_reg(priv, 0x00085, 0x07);
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if (ret)
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goto error;
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return ret;
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error:
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dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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int cxd2820r_sleep_c(struct dvb_frontend *fe)
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{
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struct cxd2820r_priv *priv = fe->demodulator_priv;
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int ret, i;
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struct reg_val_mask tab[] = {
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{ 0x000ff, 0x1f, 0xff },
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{ 0x00085, 0x00, 0xff },
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{ 0x00088, 0x01, 0xff },
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{ 0x00081, 0x00, 0xff },
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{ 0x00080, 0x00, 0xff },
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};
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dev_dbg(&priv->i2c->dev, "%s\n", __func__);
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priv->delivery_system = SYS_UNDEFINED;
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for (i = 0; i < ARRAY_SIZE(tab); i++) {
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ret = cxd2820r_wr_reg_mask(priv, tab[i].reg, tab[i].val,
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tab[i].mask);
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if (ret)
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goto error;
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}
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return ret;
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error:
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dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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int cxd2820r_get_tune_settings_c(struct dvb_frontend *fe,
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struct dvb_frontend_tune_settings *s)
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{
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s->min_delay_ms = 500;
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s->step_size = 0; /* no zigzag */
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s->max_drift = 0;
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return 0;
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}
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