Quelle  stb6100_proc.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
STB6100 Silicon Tuner wrapper
Copyright (C)2009 Igor M. Liplianin (liplianin@me.by)

*/

#include <linux/dvb/frontend.h>
#include <media/dvb_frontend.h>

static int stb6100_get_freq(struct dvb_frontend *fe, u32 *frequency)
{
 struct dvb_frontend_ops *frontend_ops = &fe->ops;
 struct dvb_tuner_ops *tuner_ops = &frontend_ops->tuner_ops;
 int err = 0;

 if (tuner_ops->get_frequency) {
  if (frontend_ops->i2c_gate_ctrl)
   frontend_ops->i2c_gate_ctrl(fe, 1);

  err = tuner_ops->get_frequency(fe, frequency);
  if (err < 0) {
   printk("%s: Invalid parameter\n", __func__);
   return err;
  }

  if (frontend_ops->i2c_gate_ctrl)
   frontend_ops->i2c_gate_ctrl(fe, 0);
 }

 return 0;
}

static int stb6100_set_freq(struct dvb_frontend *fe, u32 frequency)
{
 struct dvb_frontend_ops *frontend_ops = &fe->ops;
 struct dvb_tuner_ops *tuner_ops = &frontend_ops->tuner_ops;
 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 u32 bw = c->bandwidth_hz;
 int err = 0;

 c->frequency = frequency;
 c->bandwidth_hz = 0;  /* Don't adjust the bandwidth */

 if (tuner_ops->set_params) {
  if (frontend_ops->i2c_gate_ctrl)
   frontend_ops->i2c_gate_ctrl(fe, 1);

  err = tuner_ops->set_params(fe);
  c->bandwidth_hz = bw;
  if (err < 0) {
   printk("%s: Invalid parameter\n", __func__);
   return err;
  }

  if (frontend_ops->i2c_gate_ctrl)
   frontend_ops->i2c_gate_ctrl(fe, 0);

 }

 return 0;
}

static int stb6100_get_bandw(struct dvb_frontend *fe, u32 *bandwidth)
{
 struct dvb_frontend_ops *frontend_ops = &fe->ops;
 struct dvb_tuner_ops *tuner_ops = &frontend_ops->tuner_ops;
 int err = 0;

 if (tuner_ops->get_bandwidth) {
  if (frontend_ops->i2c_gate_ctrl)
   frontend_ops->i2c_gate_ctrl(fe, 1);

  err = tuner_ops->get_bandwidth(fe, bandwidth);
  if (err < 0) {
   printk(KERN_ERR "%s: Invalid parameter\n", __func__);
   return err;
  }

  if (frontend_ops->i2c_gate_ctrl)
   frontend_ops->i2c_gate_ctrl(fe, 0);
 }

 return 0;
}

static int stb6100_set_bandw(struct dvb_frontend *fe, u32 bandwidth)
{
 struct dvb_frontend_ops *frontend_ops = &fe->ops;
 struct dvb_tuner_ops *tuner_ops = &frontend_ops->tuner_ops;
 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 u32 freq = c->frequency;
 int err = 0;

 c->bandwidth_hz = bandwidth;
 c->frequency = 0;  /* Don't adjust the frequency */

 if (tuner_ops->set_params) {
  if (frontend_ops->i2c_gate_ctrl)
   frontend_ops->i2c_gate_ctrl(fe, 1);

  err = tuner_ops->set_params(fe);
  c->frequency = freq;
  if (err < 0) {
   printk(KERN_ERR "%s: Invalid parameter\n", __func__);
   return err;
  }

  if (frontend_ops->i2c_gate_ctrl)
   frontend_ops->i2c_gate_ctrl(fe, 0);

 }

 return 0;
}