drivers/media/dvb/frontends/lgh06xf.c

   1 /*
   2  *  lgh06xf.c - ATSC Tuner support for LG TDVS-H06xF
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18
  19 #include "dvb-pll.h"
  20 #include "lgh06xf.h"
  21
  22 #define LG_H06XF_PLL_I2C_ADDR 0x61
  23
  24 struct lgh06xf_priv {
  25         struct i2c_adapter *i2c;
  26         u32 frequency;
  27 };
  28
  29 static int lgh06xf_release(struct dvb_frontend *fe)
  30 {
  31         kfree(fe->tuner_priv);
  32         fe->tuner_priv = NULL;
  33         return 0;
  34 }
  35
  36 static int lgh06xf_set_params(struct dvb_frontend* fe,
  37                               struct dvb_frontend_parameters* params)
  38 {
  39         struct lgh06xf_priv *priv = fe->tuner_priv;
  40         u8 buf[4];
  41         struct i2c_msg msg = { .addr = LG_H06XF_PLL_I2C_ADDR, .flags = 0,
  42                                .buf = buf, .len = sizeof(buf) };
  43         u32 frequency;
  44         int result;
  45
  46         if ((result = dvb_pll_configure(&dvb_pll_lg_tdvs_h06xf, buf,
  47                                         params->frequency, 0)) < 0)
  48                 return result;
  49         else
  50                 frequency = result;
  51
  52         if (fe->ops.i2c_gate_ctrl)
  53                 fe->ops.i2c_gate_ctrl(fe, 1);
  54         if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
  55                 printk(KERN_WARNING "lgh06xf: %s error "
  56                        "(addr %02x <- %02x, result = %i)\n",
  57                        __FUNCTION__, buf[0], buf[1], result);
  58                 if (result < 0)
  59                         return result;
  60                 else
  61                         return -EREMOTEIO;
  62         }
  63
  64         /* Set the Auxiliary Byte. */
  65         buf[0] = buf[2];
  66         buf[0] &= ~0x20;
  67         buf[0] |= 0x18;
  68         buf[1] = 0x50;
  69         msg.len = 2;
  70         if (fe->ops.i2c_gate_ctrl)
  71                 fe->ops.i2c_gate_ctrl(fe, 1);
  72         if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
  73                 printk(KERN_WARNING "lgh06xf: %s error "
  74                        "(addr %02x <- %02x, result = %i)\n",
  75                        __FUNCTION__, buf[0], buf[1], result);
  76                 if (result < 0)
  77                         return result;
  78                 else
  79                         return -EREMOTEIO;
  80         }
  81
  82         priv->frequency = frequency;
  83
  84         return 0;
  85 }
  86
  87 static int lgh06xf_get_frequency(struct dvb_frontend *fe, u32 *frequency)
  88 {
  89         struct lgh06xf_priv *priv = fe->tuner_priv;
  90         *frequency = priv->frequency;
  91         return 0;
  92 }
  93
  94 static struct dvb_tuner_ops lgh06xf_tuner_ops = {
  95         .release       = lgh06xf_release,
  96         .set_params    = lgh06xf_set_params,
  97         .get_frequency = lgh06xf_get_frequency,
  98 };
  99
 100 struct dvb_frontend* lgh06xf_attach(struct dvb_frontend *fe,
 101                                     struct i2c_adapter *i2c)
 102 {
 103         struct lgh06xf_priv *priv = NULL;
 104
 105         priv = kzalloc(sizeof(struct lgh06xf_priv), GFP_KERNEL);
 106         if (priv == NULL)
 107                 return NULL;
 108
 109         priv->i2c = i2c;
 110
 111         memcpy(&fe->ops.tuner_ops, &lgh06xf_tuner_ops,
 112                sizeof(struct dvb_tuner_ops));
 113
 114         strlcpy(fe->ops.tuner_ops.info.name, dvb_pll_lg_tdvs_h06xf.name,
 115                 sizeof(fe->ops.tuner_ops.info.name));
 116
 117         fe->ops.tuner_ops.info.frequency_min = dvb_pll_lg_tdvs_h06xf.min;
 118         fe->ops.tuner_ops.info.frequency_max = dvb_pll_lg_tdvs_h06xf.max;
 119
 120         fe->tuner_priv = priv;
 121         return fe;
 122 }
 123
 124 EXPORT_SYMBOL(lgh06xf_attach);
 125
 126 MODULE_DESCRIPTION("LG TDVS-H06xF ATSC Tuner support");
 127 MODULE_AUTHOR("Michael Krufky");
 128 MODULE_LICENSE("GPL");
 129
 130 /*
 131  * Local variables:
 132  * c-basic-offset: 8
 133  * End:
 134  */