release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/media/dvb/frontends/tdhd1.h

   1 /*
   2  * tdhd1.h - ALPS TDHD1-204A tuner support
   3  *
   4  * Copyright (C) 2008 Oliver Endriss <o.endriss@gmx.de>
   5  *
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  21  *
  22  *
  23  * The project's page is at http://www.linuxtv.org
  24  */
  25
  26 #ifndef TDHD1_H
  27 #define TDHD1_H
  28
  29 #include "tda1004x.h"
  30
  31 static int alps_tdhd1_204_request_firmware(struct dvb_frontend *fe, const struct firmware **fw, char *name);
  32
  33 static struct tda1004x_config alps_tdhd1_204a_config = {
  34         .demod_address = 0x8,
  35         .invert = 1,
  36         .invert_oclk = 0,
  37         .xtal_freq = TDA10046_XTAL_4M,
  38         .agc_config = TDA10046_AGC_DEFAULT,
  39         .if_freq = TDA10046_FREQ_3617,
  40         .request_firmware = alps_tdhd1_204_request_firmware
  41 };
  42
  43 static int alps_tdhd1_204a_tuner_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params)
  44 {
  45         struct i2c_adapter *i2c = fe->tuner_priv;
  46         u8 data[4];
  47         struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = data, .len = sizeof(data) };
  48         u32 div;
  49
  50         div = (params->frequency + 36166666) / 166666;
  51
  52         data[0] = (div >> 8) & 0x7f;
  53         data[1] = div & 0xff;
  54         data[2] = 0x85;
  55
  56         if (params->frequency >= 174000000 && params->frequency <= 230000000)
  57                 data[3] = 0x02;
  58         else if (params->frequency >= 470000000 && params->frequency <= 823000000)
  59                 data[3] = 0x0C;
  60         else if (params->frequency > 823000000 && params->frequency <= 862000000)
  61                 data[3] = 0x8C;
  62         else
  63                 return -EINVAL;
  64
  65         if (fe->ops.i2c_gate_ctrl)
  66                 fe->ops.i2c_gate_ctrl(fe, 1);
  67         if (i2c_transfer(i2c, &msg, 1) != 1)
  68                 return -EIO;
  69
  70         return 0;
  71 }
  72
  73 #endif /* TDHD1_H */