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V4L/DVB (13363): ec100: add new driver for E3C EC100 DVB-T demodulator
E3C EC100 DVB-T demodulator driver Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Antti Palosaari
Mauro Carvalho Chehab
parent
c1426df678
commit
a15c7b42b2
@ -342,6 +342,13 @@ config DVB_AF9013
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help
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Say Y when you want to support this frontend.
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config DVB_EC100
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tristate "E3C EC100"
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depends on DVB_CORE && I2C
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default m if DVB_FE_CUSTOMISE
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help
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Say Y when you want to support this frontend.
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comment "DVB-C (cable) frontends"
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depends on DVB_CORE
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@ -76,3 +76,4 @@ obj-$(CONFIG_DVB_STV0900) += stv0900.o
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obj-$(CONFIG_DVB_STV090x) += stv090x.o
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obj-$(CONFIG_DVB_STV6110x) += stv6110x.o
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obj-$(CONFIG_DVB_ISL6423) += isl6423.o
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obj-$(CONFIG_DVB_EC100) += ec100.o
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335
drivers/media/dvb/frontends/ec100.c
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335
drivers/media/dvb/frontends/ec100.c
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@ -0,0 +1,335 @@
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/*
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* E3C EC100 demodulator driver
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*
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* Copyright (C) 2009 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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include "dvb_frontend.h"
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#include "ec100_priv.h"
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#include "ec100.h"
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int ec100_debug;
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module_param_named(debug, ec100_debug, int, 0644);
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MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
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struct ec100_state {
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struct i2c_adapter *i2c;
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struct dvb_frontend frontend;
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struct ec100_config config;
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u16 ber;
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};
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/* write single register */
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static int ec100_write_reg(struct ec100_state *state, u8 reg, u8 val)
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{
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u8 buf[2] = {reg, val};
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struct i2c_msg msg = {
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.addr = state->config.demod_address,
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.flags = 0,
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.len = 2,
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.buf = buf};
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if (i2c_transfer(state->i2c, &msg, 1) != 1) {
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warn("I2C write failed reg:%02x", reg);
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return -EREMOTEIO;
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}
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return 0;
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}
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/* read single register */
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static int ec100_read_reg(struct ec100_state *state, u8 reg, u8 *val)
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{
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struct i2c_msg msg[2] = {
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{
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.addr = state->config.demod_address,
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.flags = 0,
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.len = 1,
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.buf = ®
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}, {
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.addr = state->config.demod_address,
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.flags = I2C_M_RD,
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.len = 1,
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.buf = val
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}
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};
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if (i2c_transfer(state->i2c, msg, 2) != 2) {
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warn("I2C read failed reg:%02x", reg);
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return -EREMOTEIO;
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}
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return 0;
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}
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static int ec100_set_frontend(struct dvb_frontend *fe,
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struct dvb_frontend_parameters *params)
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{
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struct ec100_state *state = fe->demodulator_priv;
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int ret;
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u8 tmp, tmp2;
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deb_info("%s: freq:%d bw:%d\n", __func__, params->frequency,
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params->u.ofdm.bandwidth);
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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, params);
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ret = ec100_write_reg(state, 0x04, 0x06);
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x67, 0x58);
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x05, 0x18);
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if (ret)
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goto error;
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/* reg/bw | 6 | 7 | 8
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-------+------+------+------
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A 0x1b | 0xa1 | 0xe7 | 0x2c
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A 0x1c | 0x55 | 0x63 | 0x72
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-------+------+------+------
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B 0x1b | 0xb7 | 0x00 | 0x49
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B 0x1c | 0x55 | 0x64 | 0x72 */
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switch (params->u.ofdm.bandwidth) {
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case BANDWIDTH_6_MHZ:
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tmp = 0xb7;
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tmp2 = 0x55;
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break;
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case BANDWIDTH_7_MHZ:
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tmp = 0x00;
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tmp2 = 0x64;
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break;
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case BANDWIDTH_8_MHZ:
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default:
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tmp = 0x49;
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tmp2 = 0x72;
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}
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ret = ec100_write_reg(state, 0x1b, tmp);
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x1c, tmp2);
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x0c, 0xbb); /* if freq */
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x0d, 0x31); /* if freq */
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x08, 0x24);
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x00, 0x00); /* go */
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x00, 0x20); /* go */
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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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deb_info("%s: failed:%d\n", __func__, ret);
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return ret;
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}
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static int ec100_get_tune_settings(struct dvb_frontend *fe,
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struct dvb_frontend_tune_settings *fesettings)
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{
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fesettings->min_delay_ms = 300;
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fesettings->step_size = 0;
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fesettings->max_drift = 0;
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return 0;
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}
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static int ec100_read_status(struct dvb_frontend *fe, fe_status_t *status)
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{
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struct ec100_state *state = fe->demodulator_priv;
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int ret;
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u8 tmp;
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*status = 0;
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ret = ec100_read_reg(state, 0x42, &tmp);
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if (ret)
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goto error;
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if (tmp & 0x80) {
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/* bit7 set - have lock */
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*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
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FE_HAS_SYNC | FE_HAS_LOCK;
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} else {
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ret = ec100_read_reg(state, 0x01, &tmp);
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if (ret)
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goto error;
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if (tmp & 0x10) {
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/* bit4 set - have signal */
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*status |= FE_HAS_SIGNAL;
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if (!(tmp & 0x01)) {
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/* bit0 clear - have ~valid signal */
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*status |= FE_HAS_CARRIER | FE_HAS_VITERBI;
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}
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}
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}
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return ret;
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error:
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deb_info("%s: failed:%d\n", __func__, ret);
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return ret;
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}
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static int ec100_read_ber(struct dvb_frontend *fe, u32 *ber)
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{
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struct ec100_state *state = fe->demodulator_priv;
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int ret;
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u8 tmp, tmp2;
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u16 ber2;
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*ber = 0;
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ret = ec100_read_reg(state, 0x65, &tmp);
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if (ret)
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goto error;
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ret = ec100_read_reg(state, 0x66, &tmp2);
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if (ret)
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goto error;
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ber2 = (tmp2 << 8) | tmp;
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/* if counter overflow or clear */
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if (ber2 < state->ber)
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*ber = ber2;
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else
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*ber = ber2 - state->ber;
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state->ber = ber2;
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return ret;
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error:
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deb_info("%s: failed:%d\n", __func__, ret);
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return ret;
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}
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static int ec100_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
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{
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struct ec100_state *state = fe->demodulator_priv;
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int ret;
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u8 tmp;
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ret = ec100_read_reg(state, 0x24, &tmp);
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if (ret) {
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*strength = 0;
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goto error;
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}
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*strength = ((tmp << 8) | tmp);
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return ret;
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error:
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deb_info("%s: failed:%d\n", __func__, ret);
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return ret;
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}
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static int ec100_read_snr(struct dvb_frontend *fe, u16 *snr)
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{
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*snr = 0;
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return 0;
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}
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static int ec100_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
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{
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*ucblocks = 0;
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return 0;
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}
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static void ec100_release(struct dvb_frontend *fe)
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{
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struct ec100_state *state = fe->demodulator_priv;
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kfree(state);
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}
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static struct dvb_frontend_ops ec100_ops;
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struct dvb_frontend *ec100_attach(const struct ec100_config *config,
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struct i2c_adapter *i2c)
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{
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int ret;
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struct ec100_state *state = NULL;
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u8 tmp;
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/* allocate memory for the internal state */
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state = kzalloc(sizeof(struct ec100_state), GFP_KERNEL);
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if (state == NULL)
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goto error;
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/* setup the state */
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state->i2c = i2c;
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memcpy(&state->config, config, sizeof(struct ec100_config));
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/* check if the demod is there */
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ret = ec100_read_reg(state, 0x33, &tmp);
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if (ret || tmp != 0x0b)
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goto error;
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/* create dvb_frontend */
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memcpy(&state->frontend.ops, &ec100_ops,
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sizeof(struct dvb_frontend_ops));
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state->frontend.demodulator_priv = state;
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return &state->frontend;
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error:
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kfree(state);
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return NULL;
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}
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EXPORT_SYMBOL(ec100_attach);
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static struct dvb_frontend_ops ec100_ops = {
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.info = {
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.name = "E3C EC100 DVB-T",
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.type = FE_OFDM,
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.caps =
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FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
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FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
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FE_CAN_QPSK | FE_CAN_QAM_16 |
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FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
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FE_CAN_TRANSMISSION_MODE_AUTO |
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FE_CAN_GUARD_INTERVAL_AUTO |
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FE_CAN_HIERARCHY_AUTO |
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FE_CAN_MUTE_TS
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},
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.release = ec100_release,
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.set_frontend = ec100_set_frontend,
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.get_tune_settings = ec100_get_tune_settings,
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.read_status = ec100_read_status,
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.read_ber = ec100_read_ber,
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.read_signal_strength = ec100_read_signal_strength,
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.read_snr = ec100_read_snr,
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.read_ucblocks = ec100_read_ucblocks,
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};
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MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
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MODULE_DESCRIPTION("E3C EC100 DVB-T demodulator driver");
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MODULE_LICENSE("GPL");
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46
drivers/media/dvb/frontends/ec100.h
Normal file
46
drivers/media/dvb/frontends/ec100.h
Normal file
@ -0,0 +1,46 @@
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/*
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* E3C EC100 demodulator driver
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*
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* Copyright (C) 2009 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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifndef EC100_H
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#define EC100_H
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#include <linux/dvb/frontend.h>
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struct ec100_config {
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/* demodulator's I2C address */
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u8 demod_address;
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};
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#if defined(CONFIG_DVB_EC100) || \
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(defined(CONFIG_DVB_EC100_MODULE) && defined(MODULE))
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extern struct dvb_frontend *ec100_attach(const struct ec100_config *config,
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struct i2c_adapter *i2c);
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#else
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static inline struct dvb_frontend *ec100_attach(
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const struct ec100_config *config, struct i2c_adapter *i2c)
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{
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printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
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return NULL;
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}
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#endif
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#endif /* EC100_H */
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39
drivers/media/dvb/frontends/ec100_priv.h
Normal file
39
drivers/media/dvb/frontends/ec100_priv.h
Normal file
@ -0,0 +1,39 @@
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/*
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* E3C EC100 demodulator driver
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*
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* Copyright (C) 2009 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 with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifndef EC100_PRIV
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#define EC100_PRIV
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#define LOG_PREFIX "ec100"
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#define dprintk(var, level, args...) \
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do { if ((var & level)) printk(args); } while (0)
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#define deb_info(args...) dprintk(ec100_debug, 0x01, args)
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#undef err
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#define err(f, arg...) printk(KERN_ERR LOG_PREFIX": " f "\n" , ## arg)
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#undef info
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#define info(f, arg...) printk(KERN_INFO LOG_PREFIX": " f "\n" , ## arg)
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#undef warn
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#define warn(f, arg...) printk(KERN_WARNING LOG_PREFIX": " f "\n" , ## arg)
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#endif /* EC100_PRIV */
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