X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fmedia%2Fdvb-frontends%2Fcxd2820r_c.c;fp=kernel%2Fdrivers%2Fmedia%2Fdvb-frontends%2Fcxd2820r_c.c;h=72b0e2db3aab27f013db7e48c9335da6933f7f5d;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git diff --git a/kernel/drivers/media/dvb-frontends/cxd2820r_c.c b/kernel/drivers/media/dvb-frontends/cxd2820r_c.c new file mode 100644 index 000000000..72b0e2db3 --- /dev/null +++ b/kernel/drivers/media/dvb-frontends/cxd2820r_c.c @@ -0,0 +1,344 @@ +/* + * Sony CXD2820R demodulator driver + * + * Copyright (C) 2010 Antti Palosaari + * + * 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 }, + { 0x10071, !priv->cfg.ts_clock_inv << 4, 0x10 }, + }; + + dev_dbg(&priv->i2c->dev, "%s: frequency=%d symbol_rate=%d\n", __func__, + c->frequency, c->symbol_rate); + + /* 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 = false; /* 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; + + dev_dbg(&priv->i2c->dev, "%s: if_freq=%d\n", __func__, if_freq); + + num = if_freq / 1000; /* Hz => kHz */ + num *= 0x4000; + if_ctl = 0x4000 - DIV_ROUND_CLOSEST_ULL(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: + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __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) & 0x07) { + 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: + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __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 = true; + start_ber = 1; + } + + if (start_ber) { + /* (re)start BER */ + ret = cxd2820r_wr_reg(priv, 0x10079, 0x01); + if (ret) + goto error; + } + + return ret; +error: + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __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: + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __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: + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __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; + } + } + + dev_dbg(&priv->i2c->dev, "%s: lock=%02x %02x\n", __func__, buf[0], + buf[1]); + + return ret; +error: + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __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: + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __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 }, + }; + + dev_dbg(&priv->i2c->dev, "%s\n", __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: + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __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; +}