drivers/media/dvb-frontends/bsru6.h

   1 /*
   2  * bsru6.h - ALPS BSRU6 tuner support (moved from budget-ci.c)
   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 BSRU6_H
  23 #define BSRU6_H
  24
  25 static u8 alps_bsru6_inittab[] = {
  26         0x01, 0x15,
  27         0x02, 0x30,
  28         0x03, 0x00,
  29         0x04, 0x7d,   /* F22FR = 0x7d, F22 = f_VCO / 128 / 0x7d = 22 kHz */
  30         0x05, 0x35,   /* I2CT = 0, SCLT = 1, SDAT = 1 */
  31         0x06, 0x40,   /* DAC not used, set to high impendance mode */
  32         0x07, 0x00,   /* DAC LSB */
  33         0x08, 0x40,   /* DiSEqC off, LNB power on OP2/LOCK pin on */
  34         0x09, 0x00,   /* FIFO */
  35         0x0c, 0x51,   /* OP1 ctl = Normal, OP1 val = 1 (LNB Power ON) */
  36         0x0d, 0x82,   /* DC offset compensation = ON, beta_agc1 = 2 */
  37         0x0e, 0x23,   /* alpha_tmg = 2, beta_tmg = 3 */
  38         0x10, 0x3f,   // AGC2  0x3d
  39         0x11, 0x84,
  40         0x12, 0xb9,
  41         0x15, 0xc9,   // lock detector threshold
  42         0x16, 0x00,
  43         0x17, 0x00,
  44         0x18, 0x00,
  45         0x19, 0x00,
  46         0x1a, 0x00,
  47         0x1f, 0x50,
  48         0x20, 0x00,
  49         0x21, 0x00,
  50         0x22, 0x00,
  51         0x23, 0x00,
  52         0x28, 0x00,  // out imp: normal  out type: parallel FEC mode:0
  53         0x29, 0x1e,  // 1/2 threshold
  54         0x2a, 0x14,  // 2/3 threshold
  55         0x2b, 0x0f,  // 3/4 threshold
  56         0x2c, 0x09,  // 5/6 threshold
  57         0x2d, 0x05,  // 7/8 threshold
  58         0x2e, 0x01,
  59         0x31, 0x1f,  // test all FECs
  60         0x32, 0x19,  // viterbi and synchro search
  61         0x33, 0xfc,  // rs control
  62         0x34, 0x93,  // error control
  63         0x0f, 0x52,
  64         0xff, 0xff
  65 };
  66
  67 static int alps_bsru6_set_symbol_rate(struct dvb_frontend *fe, u32 srate, u32 ratio)
  68 {
  69         u8 aclk = 0;
  70         u8 bclk = 0;
  71
  72         if (srate < 1500000) {
  73                 aclk = 0xb7;
  74                 bclk = 0x47;
  75         } else if (srate < 3000000) {
  76                 aclk = 0xb7;
  77                 bclk = 0x4b;
  78         } else if (srate < 7000000) {
  79                 aclk = 0xb7;
  80                 bclk = 0x4f;
  81         } else if (srate < 14000000) {
  82                 aclk = 0xb7;
  83                 bclk = 0x53;
  84         } else if (srate < 30000000) {
  85                 aclk = 0xb6;
  86                 bclk = 0x53;
  87         } else if (srate < 45000000) {
  88                 aclk = 0xb4;
  89                 bclk = 0x51;
  90         }
  91
  92         stv0299_writereg(fe, 0x13, aclk);
  93         stv0299_writereg(fe, 0x14, bclk);
  94         stv0299_writereg(fe, 0x1f, (ratio >> 16) & 0xff);
  95         stv0299_writereg(fe, 0x20, (ratio >> 8) & 0xff);
  96         stv0299_writereg(fe, 0x21, ratio & 0xf0);
  97
  98         return 0;
  99 }
 100
 101 static int alps_bsru6_tuner_set_params(struct dvb_frontend *fe)
 102 {
 103         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 104         u8 buf[4];
 105         u32 div;
 106         struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = buf, .len = sizeof(buf) };
 107         struct i2c_adapter *i2c = fe->tuner_priv;
 108
 109         if ((p->frequency < 950000) || (p->frequency > 2150000))
 110                 return -EINVAL;
 111
 112         div = (p->frequency + (125 - 1)) / 125; /* round correctly */
 113         buf[0] = (div >> 8) & 0x7f;
 114         buf[1] = div & 0xff;
 115         buf[2] = 0x80 | ((div & 0x18000) >> 10) | 4;
 116         buf[3] = 0xC4;
 117
 118         if (p->frequency > 1530000)
 119                 buf[3] = 0xc0;
 120
 121         if (fe->ops.i2c_gate_ctrl)
 122                 fe->ops.i2c_gate_ctrl(fe, 1);
 123         if (i2c_transfer(i2c, &msg, 1) != 1)
 124                 return -EIO;
 125         return 0;
 126 }
 127
 128 static struct stv0299_config alps_bsru6_config = {
 129         .demod_address = 0x68,
 130         .inittab = alps_bsru6_inittab,
 131         .mclk = 88000000UL,
 132         .invert = 1,
 133         .skip_reinit = 0,
 134         .lock_output = STV0299_LOCKOUTPUT_1,
 135         .volt13_op0_op1 = STV0299_VOLT13_OP1,
 136         .min_delay_ms = 100,
 137         .set_symbol_rate = alps_bsru6_set_symbol_rate,
 138 };
 139
 140 #endif