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/* dvb-usb-i2c.c is part of the DVB USB library.
*
* Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
* see dvb-usb-init.c for copyright information.
*
* This file contains functions for (de-)initializing an I2C adapter.
*/
#include "dvb-usb-common.h"
int dvb_usb_i2c_init(struct dvb_usb_device *d)
{
int ret = 0;
if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER))
return 0;
if (d->props.i2c_algo == NULL) {
err("no i2c algorithm specified");
return -EINVAL;
}
strncpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name));
#ifdef I2C_ADAP_CLASS_TV_DIGITAL
d->i2c_adap.class = I2C_ADAP_CLASS_TV_DIGITAL,
#else
d->i2c_adap.class = I2C_CLASS_TV_DIGITAL,
#endif
d->i2c_adap.algo = d->props.i2c_algo;
d->i2c_adap.algo_data = NULL;
d->i2c_adap.dev.parent = &d->udev->dev;
i2c_set_adapdata(&d->i2c_adap, d);
if ((ret = i2c_add_adapter(&d->i2c_adap)) < 0)
err("could not add i2c adapter");
d->state |= DVB_USB_STATE_I2C;
return ret;
}
int dvb_usb_i2c_exit(struct dvb_usb_device *d)
{
if (d->state & DVB_USB_STATE_I2C)
i2c_del_adapter(&d->i2c_adap);
d->state &= ~DVB_USB_STATE_I2C;
return 0;
}
int dvb_usb_tuner_init_i2c(struct dvb_frontend *fe)
{
struct dvb_usb_adapter *adap = fe->dvb->priv;
struct i2c_msg msg = { .addr = adap->pll_addr, .flags = 0, .buf = adap->pll_init, .len = 4 };
int ret = 0;
/* if pll_desc is not used */
if (adap->pll_desc == NULL)
return 0;
if (adap->tuner_pass_ctrl)
adap->tuner_pass_ctrl(fe, 1, adap->pll_addr);
deb_pll("pll init: %x\n",adap->pll_addr);
deb_pll("pll-buf: %x %x %x %x\n",adap->pll_init[0], adap->pll_init[1],
adap->pll_init[2], adap->pll_init[3]);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if (i2c_transfer (&adap->dev->i2c_adap, &msg, 1) != 1) {
err("tuner i2c write failed for pll_init.");
ret = -EREMOTEIO;
}
msleep(1);
if (adap->tuner_pass_ctrl)
adap->tuner_pass_ctrl(fe,0,adap->pll_addr);
return ret;
}
EXPORT_SYMBOL(dvb_usb_tuner_init_i2c);
int dvb_usb_tuner_calc_regs(struct dvb_frontend *fe, struct dvb_frontend_parameters *fep, u8 *b, int buf_len)
{
struct dvb_usb_adapter *adap = fe->dvb->priv;
if (buf_len != 5)
return -EINVAL;
if (adap->pll_desc == NULL)
return 0;
deb_pll("pll addr: %x, freq: %d %p\n",adap->pll_addr, fep->frequency, adap->pll_desc);
b[0] = adap->pll_addr;
dvb_pll_configure(adap->pll_desc, &b[1], fep->frequency, fep->u.ofdm.bandwidth);
deb_pll("pll-buf: %x %x %x %x %x\n",b[0],b[1],b[2],b[3],b[4]);
return 5;
}
EXPORT_SYMBOL(dvb_usb_tuner_calc_regs);
int dvb_usb_tuner_set_params_i2c(struct dvb_frontend *fe, struct dvb_frontend_parameters *fep)
{
struct dvb_usb_adapter *adap = fe->dvb->priv;
int ret = 0;
u8 b[5];
struct i2c_msg msg = { .addr = adap->pll_addr, .flags = 0, .buf = &b[1], .len = 4 };
dvb_usb_tuner_calc_regs(fe,fep,b,5);
if (adap->tuner_pass_ctrl)
adap->tuner_pass_ctrl(fe, 1, adap->pll_addr);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if (i2c_transfer(&adap->dev->i2c_adap, &msg, 1) != 1) {
err("tuner i2c write failed for pll_set.");
ret = -EREMOTEIO;
}
msleep(1);
if (adap->tuner_pass_ctrl)
adap->tuner_pass_ctrl(fe, 0, adap->pll_addr);
return ret;
}
EXPORT_SYMBOL(dvb_usb_tuner_set_params_i2c);
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