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

   1/*
   2        STB6100 Silicon Tuner wrapper
   3        Copyright (C)2009 Igor M. Liplianin (liplianin@me.by)
   4
   5        This program is free software; you can redistribute it and/or modify
   6        it under the terms of the GNU General Public License as published by
   7        the Free Software Foundation; either version 2 of the License, or
   8        (at your option) any later version.
   9
  10        This program is distributed in the hope that it will be useful,
  11        but WITHOUT ANY WARRANTY; without even the implied warranty of
  12        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13        GNU General Public License for more details.
  14
  15        You should have received a copy of the GNU General Public License
  16        along with this program; if not, write to the Free Software
  17        Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18*/
  19
  20#include <linux/dvb/frontend.h>
  21#include <media/dvb_frontend.h>
  22
  23static int stb6100_get_freq(struct dvb_frontend *fe, u32 *frequency)
  24{
  25        struct dvb_frontend_ops *frontend_ops = &fe->ops;
  26        struct dvb_tuner_ops    *tuner_ops = &frontend_ops->tuner_ops;
  27        int err = 0;
  28
  29        if (tuner_ops->get_frequency) {
  30                if (frontend_ops->i2c_gate_ctrl)
  31                        frontend_ops->i2c_gate_ctrl(fe, 1);
  32
  33                err = tuner_ops->get_frequency(fe, frequency);
  34                if (err < 0) {
  35                        printk("%s: Invalid parameter\n", __func__);
  36                        return err;
  37                }
  38
  39                if (frontend_ops->i2c_gate_ctrl)
  40                        frontend_ops->i2c_gate_ctrl(fe, 0);
  41        }
  42
  43        return 0;
  44}
  45
  46static int stb6100_set_freq(struct dvb_frontend *fe, u32 frequency)
  47{
  48        struct dvb_frontend_ops *frontend_ops = &fe->ops;
  49        struct dvb_tuner_ops    *tuner_ops = &frontend_ops->tuner_ops;
  50        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  51        u32 bw = c->bandwidth_hz;
  52        int err = 0;
  53
  54        c->frequency = frequency;
  55        c->bandwidth_hz = 0;            /* Don't adjust the bandwidth */
  56
  57        if (tuner_ops->set_params) {
  58                if (frontend_ops->i2c_gate_ctrl)
  59                        frontend_ops->i2c_gate_ctrl(fe, 1);
  60
  61                err = tuner_ops->set_params(fe);
  62                c->bandwidth_hz = bw;
  63                if (err < 0) {
  64                        printk("%s: Invalid parameter\n", __func__);
  65                        return err;
  66                }
  67
  68                if (frontend_ops->i2c_gate_ctrl)
  69                        frontend_ops->i2c_gate_ctrl(fe, 0);
  70
  71        }
  72
  73        return 0;
  74}
  75
  76static int stb6100_get_bandw(struct dvb_frontend *fe, u32 *bandwidth)
  77{
  78        struct dvb_frontend_ops *frontend_ops = &fe->ops;
  79        struct dvb_tuner_ops    *tuner_ops = &frontend_ops->tuner_ops;
  80        int err = 0;
  81
  82        if (tuner_ops->get_bandwidth) {
  83                if (frontend_ops->i2c_gate_ctrl)
  84                        frontend_ops->i2c_gate_ctrl(fe, 1);
  85
  86                err = tuner_ops->get_bandwidth(fe, bandwidth);
  87                if (err < 0) {
  88                        printk(KERN_ERR "%s: Invalid parameter\n", __func__);
  89                        return err;
  90                }
  91
  92                if (frontend_ops->i2c_gate_ctrl)
  93                        frontend_ops->i2c_gate_ctrl(fe, 0);
  94        }
  95
  96        return 0;
  97}
  98
  99static int stb6100_set_bandw(struct dvb_frontend *fe, u32 bandwidth)
 100{
 101        struct dvb_frontend_ops *frontend_ops = &fe->ops;
 102        struct dvb_tuner_ops    *tuner_ops = &frontend_ops->tuner_ops;
 103        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 104        u32 freq = c->frequency;
 105        int err = 0;
 106
 107        c->bandwidth_hz = bandwidth;
 108        c->frequency = 0;               /* Don't adjust the frequency */
 109
 110        if (tuner_ops->set_params) {
 111                if (frontend_ops->i2c_gate_ctrl)
 112                        frontend_ops->i2c_gate_ctrl(fe, 1);
 113
 114                err = tuner_ops->set_params(fe);
 115                c->frequency = freq;
 116                if (err < 0) {
 117                        printk(KERN_ERR "%s: Invalid parameter\n", __func__);
 118                        return err;
 119                }
 120
 121                if (frontend_ops->i2c_gate_ctrl)
 122                        frontend_ops->i2c_gate_ctrl(fe, 0);
 123
 124        }
 125
 126        return 0;
 127}
 128