root/drivers/media/dvb-frontends/bsru6.h

INCLUDED FROM

DEFINITIONS

1. alps_bsru6_set_symbol_rate
2. alps_bsru6_tuner_set_params

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * bsru6.h - ALPS BSRU6 tuner support (moved from budget-ci.c)
   4  *
   5  * the project's page is at https://linuxtv.org
   6  */
   7 
   8 #ifndef BSRU6_H
   9 #define BSRU6_H
  10 
  11 static u8 alps_bsru6_inittab[] = {
  12         0x01, 0x15,
  13         0x02, 0x30,
  14         0x03, 0x00,
  15         0x04, 0x7d,   /* F22FR = 0x7d, F22 = f_VCO / 128 / 0x7d = 22 kHz */
  16         0x05, 0x35,   /* I2CT = 0, SCLT = 1, SDAT = 1 */
  17         0x06, 0x40,   /* DAC not used, set to high impendance mode */
  18         0x07, 0x00,   /* DAC LSB */
  19         0x08, 0x40,   /* DiSEqC off, LNB power on OP2/LOCK pin on */
  20         0x09, 0x00,   /* FIFO */
  21         0x0c, 0x51,   /* OP1 ctl = Normal, OP1 val = 1 (LNB Power ON) */
  22         0x0d, 0x82,   /* DC offset compensation = ON, beta_agc1 = 2 */
  23         0x0e, 0x23,   /* alpha_tmg = 2, beta_tmg = 3 */
  24         0x10, 0x3f,   // AGC2  0x3d
  25         0x11, 0x84,
  26         0x12, 0xb9,
  27         0x15, 0xc9,   // lock detector threshold
  28         0x16, 0x00,
  29         0x17, 0x00,
  30         0x18, 0x00,
  31         0x19, 0x00,
  32         0x1a, 0x00,
  33         0x1f, 0x50,
  34         0x20, 0x00,
  35         0x21, 0x00,
  36         0x22, 0x00,
  37         0x23, 0x00,
  38         0x28, 0x00,  // out imp: normal  out type: parallel FEC mode:0
  39         0x29, 0x1e,  // 1/2 threshold
  40         0x2a, 0x14,  // 2/3 threshold
  41         0x2b, 0x0f,  // 3/4 threshold
  42         0x2c, 0x09,  // 5/6 threshold
  43         0x2d, 0x05,  // 7/8 threshold
  44         0x2e, 0x01,
  45         0x31, 0x1f,  // test all FECs
  46         0x32, 0x19,  // viterbi and synchro search
  47         0x33, 0xfc,  // rs control
  48         0x34, 0x93,  // error control
  49         0x0f, 0x52,
  50         0xff, 0xff
  51 };
  52 
  53 static int alps_bsru6_set_symbol_rate(struct dvb_frontend *fe, u32 srate, u32 ratio)
  54 {
  55         u8 aclk = 0;
  56         u8 bclk = 0;
  57 
  58         if (srate < 1500000) {
  59                 aclk = 0xb7;
  60                 bclk = 0x47;
  61         } else if (srate < 3000000) {
  62                 aclk = 0xb7;
  63                 bclk = 0x4b;
  64         } else if (srate < 7000000) {
  65                 aclk = 0xb7;
  66                 bclk = 0x4f;
  67         } else if (srate < 14000000) {
  68                 aclk = 0xb7;
  69                 bclk = 0x53;
  70         } else if (srate < 30000000) {
  71                 aclk = 0xb6;
  72                 bclk = 0x53;
  73         } else if (srate < 45000000) {
  74                 aclk = 0xb4;
  75                 bclk = 0x51;
  76         }
  77 
  78         stv0299_writereg(fe, 0x13, aclk);
  79         stv0299_writereg(fe, 0x14, bclk);
  80         stv0299_writereg(fe, 0x1f, (ratio >> 16) & 0xff);
  81         stv0299_writereg(fe, 0x20, (ratio >> 8) & 0xff);
  82         stv0299_writereg(fe, 0x21, ratio & 0xf0);
  83 
  84         return 0;
  85 }
  86 
  87 static int alps_bsru6_tuner_set_params(struct dvb_frontend *fe)
  88 {
  89         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  90         u8 buf[4];
  91         u32 div;
  92         struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = buf, .len = sizeof(buf) };
  93         struct i2c_adapter *i2c = fe->tuner_priv;
  94 
  95         if ((p->frequency < 950000) || (p->frequency > 2150000))
  96                 return -EINVAL;
  97 
  98         div = (p->frequency + (125 - 1)) / 125; /* round correctly */
  99         buf[0] = (div >> 8) & 0x7f;
 100         buf[1] = div & 0xff;
 101         buf[2] = 0x80 | ((div & 0x18000) >> 10) | 4;
 102         buf[3] = 0xC4;
 103 
 104         if (p->frequency > 1530000)
 105                 buf[3] = 0xc0;
 106 
 107         if (fe->ops.i2c_gate_ctrl)
 108                 fe->ops.i2c_gate_ctrl(fe, 1);
 109         if (i2c_transfer(i2c, &msg, 1) != 1)
 110                 return -EIO;
 111         return 0;
 112 }
 113 
 114 static struct stv0299_config alps_bsru6_config = {
 115         .demod_address = 0x68,
 116         .inittab = alps_bsru6_inittab,
 117         .mclk = 88000000UL,
 118         .invert = 1,
 119         .skip_reinit = 0,
 120         .lock_output = STV0299_LOCKOUTPUT_1,
 121         .volt13_op0_op1 = STV0299_VOLT13_OP1,
 122         .min_delay_ms = 100,
 123         .set_symbol_rate = alps_bsru6_set_symbol_rate,
 124 };
 125 
 126 #endif