LXR linux/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 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program; if not, write to the Free Software
  18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  20 *
  21 *
  22 * the project's page is at http://www.linuxtv.org
  23 */
  24
  25#ifndef BSBE1_H
  26#define BSBE1_H
  27
  28static u8 alps_bsbe1_inittab[] = {
  29        0x01, 0x15,   /* XTAL = 4MHz, VCO = 352 MHz */
  30        0x02, 0x30,   /* MCLK = 88 MHz */
  31        0x03, 0x00,   /* ACR output 0 */
  32        0x04, 0x7d,   /* F22FR = 0x7d, F22 = f_VCO / 128 / 0x7d = 22 kHz */
  33        0x05, 0x05,   /* I2CT = 0, SCLT = 1, SDAT = 1 */
  34        0x06, 0x00,   /* DAC output 0 */
  35        0x08, 0x40,   /* DiSEqC off, LNB power on OP2/LOCK pin on */
  36        0x09, 0x00,   /* FIFO */
  37        0x0c, 0x51,   /* OP1/OP0 normal, val = 1 (LNB power on) */
  38        0x0d, 0x82,   /* DC offset compensation = on, beta_agc1 = 2 */
  39        0x0f, 0x92,   /* AGC1R */
  40        0x10, 0x34,   /* AGC2O */
  41        0x11, 0x84,   /* TLSR */
  42        0x12, 0xb9,   /* CFD */
  43        0x15, 0xc9,   /* lock detector threshold */
  44        0x28, 0x00,   /* out imp: normal, type: parallel, FEC mode: QPSK */
  45        0x33, 0xfc,   /* RS control */
  46        0x34, 0x93,   /* count viterbi bit errors per 2E18 bytes */
  47        0xff, 0xff
  48};
  49
  50
  51static int alps_bsbe1_set_symbol_rate(struct dvb_frontend* fe, u32 srate, u32 ratio)
  52{
  53        u8 aclk = 0;
  54        u8 bclk = 0;
  55
  56        if (srate < 1500000) { aclk = 0xb7; bclk = 0x47; }
  57        else if (srate < 3000000) { aclk = 0xb7; bclk = 0x4b; }
  58        else if (srate < 7000000) { aclk = 0xb7; bclk = 0x4f; }
  59        else if (srate < 14000000) { aclk = 0xb7; bclk = 0x53; }
  60        else if (srate < 30000000) { aclk = 0xb6; bclk = 0x53; }
  61        else if (srate < 45000000) { aclk = 0xb4; bclk = 0x51; }
  62
  63        stv0299_writereg(fe, 0x13, aclk);
  64        stv0299_writereg(fe, 0x14, bclk);
  65        stv0299_writereg(fe, 0x1f, (ratio >> 16) & 0xff);
  66        stv0299_writereg(fe, 0x20, (ratio >>  8) & 0xff);
  67        stv0299_writereg(fe, 0x21, (ratio      ) & 0xf0);
  68
  69        return 0;
  70}
  71
  72static int alps_bsbe1_tuner_set_params(struct dvb_frontend* fe, struct dvb_frontend_parameters *params)
  73{
  74        int ret;
  75        u8 data[4];
  76        u32 div;
  77        struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = data, .len = sizeof(data) };
  78        struct i2c_adapter *i2c = fe->tuner_priv;
  79
  80        if ((params->frequency < 950000) || (params->frequency > 2150000))
  81                return -EINVAL;
  82
  83        div = params->frequency / 1000;
  84        data[0] = (div >> 8) & 0x7f;
  85        data[1] = div & 0xff;
  86        data[2] = 0x80 | ((div & 0x18000) >> 10) | 0x1;
  87        data[3] = 0xe0;
  88
  89        if (fe->ops.i2c_gate_ctrl)
  90                fe->ops.i2c_gate_ctrl(fe, 1);
  91        ret = i2c_transfer(i2c, &msg, 1);
  92        return (ret != 1) ? -EIO : 0;
  93}
  94
  95static struct stv0299_config alps_bsbe1_config = {
  96        .demod_address = 0x68,
  97        .inittab = alps_bsbe1_inittab,
  98        .mclk = 88000000UL,
  99        .invert = 1,
 100        .skip_reinit = 0,
 101        .min_delay_ms = 100,
 102        .set_symbol_rate = alps_bsbe1_set_symbol_rate,
 103};
 104
 105#endif
 106