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 
11 static 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 
alps_bsbe1_set_symbol_rate(struct dvb_frontend * fe,u32 srate,u32 ratio)34 static 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 
alps_bsbe1_tuner_set_params(struct dvb_frontend * fe)55 static 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 
79 static 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