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/*
* lgh06xf.c - ATSC Tuner support for LG TDVS-H06xF
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "dvb-pll.h"
#include "lgh06xf.h"
#define LG_H06XF_PLL_I2C_ADDR 0x61
struct lgh06xf_priv {
struct i2c_adapter *i2c;
u32 frequency;
};
static int lgh06xf_release(struct dvb_frontend *fe)
{
kfree(fe->tuner_priv);
fe->tuner_priv = NULL;
return 0;
}
static int lgh06xf_set_params(struct dvb_frontend* fe,
struct dvb_frontend_parameters* params)
{
struct lgh06xf_priv *priv = fe->tuner_priv;
u8 buf[4];
struct i2c_msg msg = { .addr = LG_H06XF_PLL_I2C_ADDR, .flags = 0,
.buf = buf, .len = sizeof(buf) };
u32 div;
int i;
int err;
dvb_pll_configure(&dvb_pll_lg_tdvs_h06xf, buf, params->frequency, 0);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if ((err = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
printk(KERN_WARNING "lgh06xf: %s error "
"(addr %02x <- %02x, err = %i)\n",
__FUNCTION__, buf[0], buf[1], err);
if (err < 0)
return err;
else
return -EREMOTEIO;
}
/* Set the Auxiliary Byte. */
buf[0] = buf[2];
buf[0] &= ~0x20;
buf[0] |= 0x18;
buf[1] = 0x50;
msg.len = 2;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if ((err = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
printk(KERN_WARNING "lgh06xf: %s error "
"(addr %02x <- %02x, err = %i)\n",
__FUNCTION__, buf[0], buf[1], err);
if (err < 0)
return err;
else
return -EREMOTEIO;
}
// calculate the frequency we set it to
for (i = 0; i < dvb_pll_lg_tdvs_h06xf.count; i++) {
if (params->frequency > dvb_pll_lg_tdvs_h06xf.entries[i].limit)
continue;
break;
}
div = (params->frequency + dvb_pll_lg_tdvs_h06xf.entries[i].offset) /
dvb_pll_lg_tdvs_h06xf.entries[i].stepsize;
priv->frequency = (div * dvb_pll_lg_tdvs_h06xf.entries[i].stepsize) -
dvb_pll_lg_tdvs_h06xf.entries[i].offset;
return 0;
}
static int lgh06xf_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct lgh06xf_priv *priv = fe->tuner_priv;
*frequency = priv->frequency;
return 0;
}
static struct dvb_tuner_ops lgh06xf_tuner_ops = {
.release = lgh06xf_release,
.set_params = lgh06xf_set_params,
.get_frequency = lgh06xf_get_frequency,
};
struct dvb_frontend* lgh06xf_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c)
{
struct lgh06xf_priv *priv = NULL;
priv = kzalloc(sizeof(struct lgh06xf_priv), GFP_KERNEL);
if (priv == NULL)
return NULL;
priv->i2c = i2c;
memcpy(&fe->ops.tuner_ops, &lgh06xf_tuner_ops,
sizeof(struct dvb_tuner_ops));
strlcpy(fe->ops.tuner_ops.info.name, dvb_pll_lg_tdvs_h06xf.name,
sizeof(fe->ops.tuner_ops.info.name));
fe->ops.tuner_ops.info.frequency_min = dvb_pll_lg_tdvs_h06xf.min;
fe->ops.tuner_ops.info.frequency_max = dvb_pll_lg_tdvs_h06xf.max;
fe->tuner_priv = priv;
return fe;
}
EXPORT_SYMBOL(lgh06xf_attach);
MODULE_DESCRIPTION("LG TDVS-H06xF ATSC Tuner support");
MODULE_AUTHOR("Michael Krufky");
MODULE_LICENSE("GPL");
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
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