drivers/media/dvb-frontends/stb6100_cfg.h

   1 /*
   2         STB6100 Silicon Tuner
   3         Copyright (C) Manu Abraham ([email protected])
   4
   5         Copyright (C) ST Microelectronics
   6
   7         This program is free software; you can redistribute it and/or modify
   8         it under the terms of the GNU General Public License as published by
   9         the Free Software Foundation; either version 2 of the License, or
  10         (at your option) any later version.
  11
  12         This program is distributed in the hope that it will be useful,
  13         but WITHOUT ANY WARRANTY; without even the implied warranty of
  14         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15         GNU General Public License for more details.
  16
  17         You should have received a copy of the GNU General Public License
  18         along with this program; if not, write to the Free Software
  19         Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include <linux/dvb/frontend.h>
  23 #include "dvb_frontend.h"
  24
  25 static int stb6100_get_frequency(struct dvb_frontend *fe, u32 *frequency)
  26 {
  27         struct dvb_frontend_ops *frontend_ops = &fe->ops;
  28         struct dvb_tuner_ops    *tuner_ops = &frontend_ops->tuner_ops;
  29         int err = 0;
  30
  31         if (tuner_ops->get_frequency) {
  32                 err = tuner_ops->get_frequency(fe, frequency);
  33                 if (err < 0) {
  34                         printk("%s: Invalid parameter\n", __func__);
  35                         return err;
  36                 }
  37         }
  38         return 0;
  39 }
  40
  41 static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
  42 {
  43         struct dvb_frontend_ops *frontend_ops = &fe->ops;
  44         struct dvb_tuner_ops    *tuner_ops = &frontend_ops->tuner_ops;
  45         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  46         u32 bw = c->bandwidth_hz;
  47         int err = 0;
  48
  49         c->frequency = frequency;
  50         c->bandwidth_hz = 0;            /* Don't adjust the bandwidth */
  51
  52         if (tuner_ops->set_params) {
  53                 err = tuner_ops->set_params(fe);
  54                 c->bandwidth_hz = bw;
  55                 if (err < 0) {
  56                         printk("%s: Invalid parameter\n", __func__);
  57                         return err;
  58                 }
  59         }
  60         return 0;
  61 }
  62
  63 static int stb6100_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
  64 {
  65         struct dvb_frontend_ops *frontend_ops = &fe->ops;
  66         struct dvb_tuner_ops    *tuner_ops = &frontend_ops->tuner_ops;
  67         int err = 0;
  68
  69         if (tuner_ops->get_bandwidth) {
  70                 err = tuner_ops->get_bandwidth(fe, bandwidth);
  71                 if (err < 0) {
  72                         printk("%s: Invalid parameter\n", __func__);
  73                         return err;
  74                 }
  75         }
  76         return 0;
  77 }
  78
  79 static int stb6100_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
  80 {
  81         struct dvb_frontend_ops *frontend_ops = &fe->ops;
  82         struct dvb_tuner_ops    *tuner_ops = &frontend_ops->tuner_ops;
  83         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  84         u32 freq = c->frequency;
  85         int err = 0;
  86
  87         c->bandwidth_hz = bandwidth;
  88         c->frequency = 0;               /* Don't adjust the frequency */
  89
  90         if (tuner_ops->set_params) {
  91                 err = tuner_ops->set_params(fe);
  92                 c->frequency = freq;
  93                 if (err < 0) {
  94                         printk("%s: Invalid parameter\n", __func__);
  95                         return err;
  96                 }
  97         }
  98         return 0;
  99 }