media/dvb-frontends/bsbe1.h

0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  * bsbe1.h - ALPS BSBE1 tuner support
0004  *
0005  * the project's page is at https://linuxtv.org
0006  */
0007
0008 #ifndef BSBE1_H
0009 #define BSBE1_H
0010
0011 static u8 alps_bsbe1_inittab[] = {
0012     0x01, 0x15,   /* XTAL = 4MHz, VCO = 352 MHz */
0013     0x02, 0x30,   /* MCLK = 88 MHz */
0014     0x03, 0x00,   /* ACR output 0 */
0015     0x04, 0x7d,   /* F22FR = 0x7d, F22 = f_VCO / 128 / 0x7d = 22 kHz */
0016     0x05, 0x05,   /* I2CT = 0, SCLT = 1, SDAT = 1 */
0017     0x06, 0x00,   /* DAC output 0 */
0018     0x08, 0x40,   /* DiSEqC off, LNB power on OP2/LOCK pin on */
0019     0x09, 0x00,   /* FIFO */
0020     0x0c, 0x51,   /* OP1/OP0 normal, val = 1 (LNB power on) */
0021     0x0d, 0x82,   /* DC offset compensation = on, beta_agc1 = 2 */
0022     0x0f, 0x92,   /* AGC1R */
0023     0x10, 0x34,   /* AGC2O */
0024     0x11, 0x84,   /* TLSR */
0025     0x12, 0xb9,   /* CFD */
0026     0x15, 0xc9,   /* lock detector threshold */
0027     0x28, 0x00,   /* out imp: normal, type: parallel, FEC mode: QPSK */
0028     0x33, 0xfc,   /* RS control */
0029     0x34, 0x93,   /* count viterbi bit errors per 2E18 bytes */
0030     0xff, 0xff
0031 };
0032
0033
0034 static int alps_bsbe1_set_symbol_rate(struct dvb_frontend* fe, u32 srate, u32 ratio)
0035 {
0036     u8 aclk = 0;
0037     u8 bclk = 0;
0038
0039     if (srate < 1500000) { aclk = 0xb7; bclk = 0x47; }
0040     else if (srate < 3000000) { aclk = 0xb7; bclk = 0x4b; }
0041     else if (srate < 7000000) { aclk = 0xb7; bclk = 0x4f; }
0042     else if (srate < 14000000) { aclk = 0xb7; bclk = 0x53; }
0043     else if (srate < 30000000) { aclk = 0xb6; bclk = 0x53; }
0044     else if (srate < 45000000) { aclk = 0xb4; bclk = 0x51; }
0045
0046     stv0299_writereg(fe, 0x13, aclk);
0047     stv0299_writereg(fe, 0x14, bclk);
0048     stv0299_writereg(fe, 0x1f, (ratio >> 16) & 0xff);
0049     stv0299_writereg(fe, 0x20, (ratio >>  8) & 0xff);
0050     stv0299_writereg(fe, 0x21, (ratio      ) & 0xf0);
0051
0052     return 0;
0053 }
0054
0055 static int alps_bsbe1_tuner_set_params(struct dvb_frontend *fe)
0056 {
0057     struct dtv_frontend_properties *p = &fe->dtv_property_cache;
0058     int ret;
0059     u8 data[4];
0060     u32 div;
0061     struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = data, .len = sizeof(data) };
0062     struct i2c_adapter *i2c = fe->tuner_priv;
0063
0064     if ((p->frequency < 950000) || (p->frequency > 2150000))
0065         return -EINVAL;
0066
0067     div = p->frequency / 1000;
0068     data[0] = (div >> 8) & 0x7f;
0069     data[1] = div & 0xff;
0070     data[2] = 0x80 | ((div & 0x18000) >> 10) | 0x1;
0071     data[3] = 0xe0;
0072
0073     if (fe->ops.i2c_gate_ctrl)
0074         fe->ops.i2c_gate_ctrl(fe, 1);
0075     ret = i2c_transfer(i2c, &msg, 1);
0076     return (ret != 1) ? -EIO : 0;
0077 }
0078
0079 static struct stv0299_config alps_bsbe1_config = {
0080     .demod_address = 0x68,
0081     .inittab = alps_bsbe1_inittab,
0082     .mclk = 88000000UL,
0083     .invert = 1,
0084     .skip_reinit = 0,
0085     .min_delay_ms = 100,
0086     .set_symbol_rate = alps_bsbe1_set_symbol_rate,
0087 };
0088
0089 #endif