drivers/media/dvb-frontends/bsbe1.h

   1 /*
   2  * bsbe1.h - ALPS BSBE1 tuner support
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   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  * To obtain the license, point your browser to
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  *
  19  * the project's page is at https://linuxtv.org
  20  */
  21
  22 #ifndef BSBE1_H
  23 #define BSBE1_H
  24
  25 static u8 alps_bsbe1_inittab[] = {
  26         0x01, 0x15,   /* XTAL = 4MHz, VCO = 352 MHz */
  27         0x02, 0x30,   /* MCLK = 88 MHz */
  28         0x03, 0x00,   /* ACR output 0 */
  29         0x04, 0x7d,   /* F22FR = 0x7d, F22 = f_VCO / 128 / 0x7d = 22 kHz */
  30         0x05, 0x05,   /* I2CT = 0, SCLT = 1, SDAT = 1 */
  31         0x06, 0x00,   /* DAC output 0 */
  32         0x08, 0x40,   /* DiSEqC off, LNB power on OP2/LOCK pin on */
  33         0x09, 0x00,   /* FIFO */
  34         0x0c, 0x51,   /* OP1/OP0 normal, val = 1 (LNB power on) */
  35         0x0d, 0x82,   /* DC offset compensation = on, beta_agc1 = 2 */
  36         0x0f, 0x92,   /* AGC1R */
  37         0x10, 0x34,   /* AGC2O */
  38         0x11, 0x84,   /* TLSR */
  39         0x12, 0xb9,   /* CFD */
  40         0x15, 0xc9,   /* lock detector threshold */
  41         0x28, 0x00,   /* out imp: normal, type: parallel, FEC mode: QPSK */
  42         0x33, 0xfc,   /* RS control */
  43         0x34, 0x93,   /* count viterbi bit errors per 2E18 bytes */
  44         0xff, 0xff
  45 };
  46
  47
  48 static int alps_bsbe1_set_symbol_rate(struct dvb_frontend* fe, u32 srate, u32 ratio)
  49 {
  50         u8 aclk = 0;
  51         u8 bclk = 0;
  52
  53         if (srate < 1500000) { aclk = 0xb7; bclk = 0x47; }
  54         else if (srate < 3000000) { aclk = 0xb7; bclk = 0x4b; }
  55         else if (srate < 7000000) { aclk = 0xb7; bclk = 0x4f; }
  56         else if (srate < 14000000) { aclk = 0xb7; bclk = 0x53; }
  57         else if (srate < 30000000) { aclk = 0xb6; bclk = 0x53; }
  58         else if (srate < 45000000) { aclk = 0xb4; bclk = 0x51; }
  59
  60         stv0299_writereg(fe, 0x13, aclk);
  61         stv0299_writereg(fe, 0x14, bclk);
  62         stv0299_writereg(fe, 0x1f, (ratio >> 16) & 0xff);
  63         stv0299_writereg(fe, 0x20, (ratio >>  8) & 0xff);
  64         stv0299_writereg(fe, 0x21, (ratio      ) & 0xf0);
  65
  66         return 0;
  67 }
  68
  69 static int alps_bsbe1_tuner_set_params(struct dvb_frontend *fe)
  70 {
  71         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  72         int ret;
  73         u8 data[4];
  74         u32 div;
  75         struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = data, .len = sizeof(data) };
  76         struct i2c_adapter *i2c = fe->tuner_priv;
  77
  78         if ((p->frequency < 950000) || (p->frequency > 2150000))
  79                 return -EINVAL;
  80
  81         div = p->frequency / 1000;
  82         data[0] = (div >> 8) & 0x7f;
  83         data[1] = div & 0xff;
  84         data[2] = 0x80 | ((div & 0x18000) >> 10) | 0x1;
  85         data[3] = 0xe0;
  86
  87         if (fe->ops.i2c_gate_ctrl)
  88                 fe->ops.i2c_gate_ctrl(fe, 1);
  89         ret = i2c_transfer(i2c, &msg, 1);
  90         return (ret != 1) ? -EIO : 0;
  91 }
  92
  93 static struct stv0299_config alps_bsbe1_config = {
  94         .demod_address = 0x68,
  95         .inittab = alps_bsbe1_inittab,
  96         .mclk = 88000000UL,
  97         .invert = 1,
  98         .skip_reinit = 0,
  99         .min_delay_ms = 100,
 100         .set_symbol_rate = alps_bsbe1_set_symbol_rate,
 101 };
 102
 103 #endif