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
127