/*
* NXP TDA10071 + Conexant CX24118A DVB-S/S2 demodulator + tuner driver
*
* Copyright (C) 2011 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 "tda10071_priv.h"
static struct dvb_frontend_ops tda10071_ops;
/* write multiple registers */
static int tda10071_wr_regs(struct tda10071_priv *priv, u8 reg, u8 *val,
int len)
{
int ret;
u8 buf[len+1];
struct i2c_msg msg[1] = {
{
.addr = priv->cfg.demod_i2c_addr,
.flags = 0,
.len = sizeof(buf),
.buf = buf,
}
};
buf[0] = reg;
memcpy(&buf[1], val, len);
ret = i2c_transfer(priv->i2c, msg, 1);
if (ret == 1) {
ret = 0;
} else {
dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \
"len=%d\n", KBUILD_MODNAME, ret, reg, len);
ret = -EREMOTEIO;
}
return ret;
}
/* read multiple registers */
static int tda10071_rd_regs(struct tda10071_priv *priv, u8 reg, u8 *val,
int len)
{
int ret;
u8 buf[len];
struct i2c_msg msg[2] = {
{
.addr = priv->cfg.demod_i2c_addr,
.flags = 0,
.len = 1,
.buf = ®,
}, {
.addr = priv->cfg.demod_i2c_addr,
.flags = I2C_M_RD,
.len = sizeof(buf),
.buf = buf,
}
};
ret = i2c_transfer(priv->i2c, msg, 2);
if (ret == 2) {
memcpy(val, buf, len);
ret = 0;
} else {
dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \
"len=%d\n", KBUILD_MODNAME, ret, reg, len);
ret = -EREMOTEIO;
}
return ret;
}
/* write single register */
static int tda10071_wr_reg(struct tda10071_priv *priv, u8 reg, u8 val)
{
return tda10071_wr_regs(priv, reg, &val, 1);
}
/* read single register */
