LXR linux/drivers/media/dvb-frontends/bsbe1.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * bsbe1.h - ALPS BSBE1 tuner support
   4 *
   5 * the project's page is at https://linuxtv.org
   6 */
   7
   8#ifndef BSBE1_H
   9#define BSBE1_H
  10
  11static u8 alps_bsbe1_inittab[] = {
  12        0x01, 0x15,   /* XTAL = 4MHz, VCO = 352 MHz */
  13        0x02, 0x30,   /* MCLK = 88 MHz */
  14        0x03, 0x00,   /* ACR output 0 */
  15        0x04, 0x7d,   /* F22FR = 0x7d, F22 = f_VCO / 128 / 0x7d = 22 kHz */
  16        0x05, 0x05,   /* I2CT = 0, SCLT = 1, SDAT = 1 */
  17        0x06, 0x00,   /* DAC output 0 */
  18        0x08, 0x40,   /* DiSEqC off, LNB power on OP2/LOCK pin on */
  19        0x09, 0x00,   /* FIFO */
  20        0x0c, 0x51,   /* OP1/OP0 normal, val = 1 (LNB power on) */
  21        0x0d, 0x82,   /* DC offset compensation = on, beta_agc1 = 2 */
  22        0x0f, 0x92,   /* AGC1R */
  23        0x10, 0x34,   /* AGC2O */
  24        0x11, 0x84,   /* TLSR */
  25        0x12, 0xb9,   /* CFD */
  26        0x15, 0xc9,   /* lock detector threshold */
  27        0x28, 0x00,   /* out imp: normal, type: parallel, FEC mode: QPSK */
  28        0x33, 0xfc,   /* RS control */
  29        0x34, 0x93,   /* count viterbi bit errors per 2E18 bytes */
  30        0xff, 0xff
  31};
  32
  33
  34static int alps_bsbe1_set_symbol_rate(struct dvb_frontend* fe, u32 srate, u32 ratio)
  35{
  36        u8 aclk = 0;
  37        u8 bclk = 0;
  38
  39        if (srate < 1500000) { aclk = 0xb7; bclk = 0x47; }
  40        else if (srate < 3000000) { aclk = 0xb7; bclk = 0x4b; }
  41        else if (srate < 7000000) { aclk = 0xb7; bclk = 0x4f; }
  42        else if (srate < 14000000) { aclk = 0xb7; bclk = 0x53; }
  43        else if (srate < 30000000) { aclk = 0xb6; bclk = 0x53; }
  44        else if (srate < 45000000) { aclk = 0xb4; bclk = 0x51; }
  45
  46        stv0299_writereg(fe, 0x13, aclk);
  47        stv0299_writereg(fe, 0x14, bclk);
  48        stv0299_writereg(fe, 0x1f, (ratio >> 16) & 0xff);
  49        stv0299_writereg(fe, 0x20, (ratio >>  8) & 0xff);
  50        stv0299_writereg(fe, 0x21, (ratio      ) & 0xf0);
  51
  52        return 0;
  53}
  54
  55static int alps_bsbe1_tuner_set_params(struct dvb_frontend *fe)
  56{
  57        struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  58        int ret;
  59        u8 data[4];
  60        u32 div;
  61        struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = data, .len = sizeof(data) };
  62        struct i2c_adapter *i2c = fe->tuner_priv;
  63
  64        if ((p->frequency < 950000) || (p->frequency > 2150000))
  65                return -EINVAL;
  66
  67        div = p->frequency / 1000;
  68        data[0] = (div >> 8) & 0x7f;
  69        data[1] = div & 0xff;
  70        data[2] = 0x80 | ((div & 0x18000) >> 10) | 0x1;
  71        data[3] = 0xe0;
  72
  73        if (fe->ops.i2c_gate_ctrl)
  74                fe->ops.i2c_gate_ctrl(fe, 1);
  75        ret = i2c_transfer(i2c, &msg, 1);
  76        return (ret != 1) ? -EIO : 0;
  77}
  78
  79static struct stv0299_config alps_bsbe1_config = {
  80        .demod_address = 0x68,
  81        .inittab = alps_bsbe1_inittab,
  82        .mclk = 88000000UL,
  83        .invert = 1,
  84        .skip_reinit = 0,
  85        .min_delay_ms = 100,
  86        .set_symbol_rate = alps_bsbe1_set_symbol_rate,
  87};
  88
  89#endif
  90