LXR linux/drivers/media/dvb-frontends/stb6100

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3        STB6100 Silicon Tuner wrapper
   4        Copyright (C)2009 Igor M. Liplianin (liplianin@me.by)
   5
   6*/
   7
   8#include <linux/dvb/frontend.h>
   9#include <media/dvb_frontend.h>
  10
  11static int stb6100_get_freq(struct dvb_frontend *fe, u32 *frequency)
  12{
  13        struct dvb_frontend_ops *frontend_ops = &fe->ops;
  14        struct dvb_tuner_ops    *tuner_ops = &frontend_ops->tuner_ops;
  15        int err = 0;
  16
  17        if (tuner_ops->get_frequency) {
  18                if (frontend_ops->i2c_gate_ctrl)
  19                        frontend_ops->i2c_gate_ctrl(fe, 1);
  20
  21                err = tuner_ops->get_frequency(fe, frequency);
  22                if (err < 0) {
  23                        printk("%s: Invalid parameter\n", __func__);
  24                        return err;
  25                }
  26
  27                if (frontend_ops->i2c_gate_ctrl)
  28                        frontend_ops->i2c_gate_ctrl(fe, 0);
  29        }
  30
  31        return 0;
  32}
  33
  34static int stb6100_set_freq(struct dvb_frontend *fe, u32 frequency)
  35{
  36        struct dvb_frontend_ops *frontend_ops = &fe->ops;
  37        struct dvb_tuner_ops    *tuner_ops = &frontend_ops->tuner_ops;
  38        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  39        u32 bw = c->bandwidth_hz;
  40        int err = 0;
  41
  42        c->frequency = frequency;
  43        c->bandwidth_hz = 0;            /* Don't adjust the bandwidth */
  44
  45        if (tuner_ops->set_params) {
  46                if (frontend_ops->i2c_gate_ctrl)
  47                        frontend_ops->i2c_gate_ctrl(fe, 1);
  48
  49                err = tuner_ops->set_params(fe);
  50                c->bandwidth_hz = bw;
  51                if (err < 0) {
  52                        printk("%s: Invalid parameter\n", __func__);
  53                        return err;
  54                }
  55
  56                if (frontend_ops->i2c_gate_ctrl)
  57                        frontend_ops->i2c_gate_ctrl(fe, 0);
  58
  59        }
  60
  61        return 0;
  62}
  63
  64static int stb6100_get_bandw(struct dvb_frontend *fe, u32 *bandwidth)
  65{
  66        struct dvb_frontend_ops *frontend_ops = &fe->ops;
  67        struct dvb_tuner_ops    *tuner_ops = &frontend_ops->tuner_ops;
  68        int err = 0;
  69
  70        if (tuner_ops->get_bandwidth) {
  71                if (frontend_ops->i2c_gate_ctrl)
  72                        frontend_ops->i2c_gate_ctrl(fe, 1);
  73
  74                err = tuner_ops->get_bandwidth(fe, bandwidth);
  75                if (err < 0) {
  76                        printk(KERN_ERR "%s: Invalid parameter\n", __func__);
  77                        return err;
  78                }
  79
  80                if (frontend_ops->i2c_gate_ctrl)
  81                        frontend_ops->i2c_gate_ctrl(fe, 0);
  82        }
  83
  84        return 0;
  85}
  86
  87static int stb6100_set_bandw(struct dvb_frontend *fe, u32 bandwidth)
  88{
  89        struct dvb_frontend_ops *frontend_ops = &fe->ops;
  90        struct dvb_tuner_ops    *tuner_ops = &frontend_ops->tuner_ops;
  91        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  92        u32 freq = c->frequency;
  93        int err = 0;
  94
  95        c->bandwidth_hz = bandwidth;
  96        c->frequency = 0;               /* Don't adjust the frequency */
  97
  98        if (tuner_ops->set_params) {
  99                if (frontend_ops->i2c_gate_ctrl)
 100                        frontend_ops->i2c_gate_ctrl(fe, 1);
 101
 102                err = tuner_ops->set_params(fe);
 103                c->frequency = freq;
 104                if (err < 0) {
 105                        printk(KERN_ERR "%s: Invalid parameter\n", __func__);
 106                        return err;
 107                }
 108
 109                if (frontend_ops->i2c_gate_ctrl)
 110                        frontend_ops->i2c_gate_ctrl(fe, 0);
 111
 112        }
 113
 114        return 0;
 115}
 116