Commit | Line | Data |
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74ba9207 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
6bca3580 AQ |
2 | /* |
3 | Driver for Philips tda8262/tda8263 DVBS Silicon tuners | |
4 | ||
5 | (c) 2006 Andrew de Quincey | |
6 | ||
6bca3580 AQ |
7 | |
8 | */ | |
9 | ||
5a0e3ad6 | 10 | #include <linux/slab.h> |
6bca3580 AQ |
11 | #include <linux/module.h> |
12 | #include <linux/dvb/frontend.h> | |
13 | #include <asm/types.h> | |
14 | ||
15 | #include "tda826x.h" | |
16 | ||
ff699e6b | 17 | static int debug; |
8b9a4664 AQ |
18 | #define dprintk(args...) \ |
19 | do { \ | |
20 | if (debug) printk(KERN_DEBUG "tda826x: " args); \ | |
21 | } while (0) | |
22 | ||
6bca3580 AQ |
23 | struct tda826x_priv { |
24 | /* i2c details */ | |
25 | int i2c_address; | |
26 | struct i2c_adapter *i2c; | |
27 | u8 has_loopthrough:1; | |
28 | u32 frequency; | |
29 | }; | |
30 | ||
f2709c20 MCC |
31 | static void tda826x_release(struct dvb_frontend *fe) |
32 | { | |
33 | kfree(fe->tuner_priv); | |
34 | fe->tuner_priv = NULL; | |
35 | } | |
36 | ||
6bca3580 AQ |
37 | static int tda826x_sleep(struct dvb_frontend *fe) |
38 | { | |
39 | struct tda826x_priv *priv = fe->tuner_priv; | |
40 | int ret; | |
41 | u8 buf [] = { 0x00, 0x8d }; | |
42 | struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = buf, .len = 2 }; | |
43 | ||
271ddbf7 | 44 | dprintk("%s:\n", __func__); |
8b9a4664 | 45 | |
6bca3580 AQ |
46 | if (!priv->has_loopthrough) |
47 | buf[1] = 0xad; | |
48 | ||
49 | if (fe->ops.i2c_gate_ctrl) | |
50 | fe->ops.i2c_gate_ctrl(fe, 1); | |
51 | if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) { | |
271ddbf7 | 52 | dprintk("%s: i2c error\n", __func__); |
6bca3580 AQ |
53 | } |
54 | if (fe->ops.i2c_gate_ctrl) | |
55 | fe->ops.i2c_gate_ctrl(fe, 0); | |
6bca3580 AQ |
56 | |
57 | return (ret == 1) ? 0 : ret; | |
58 | } | |
59 | ||
14d24d14 | 60 | static int tda826x_set_params(struct dvb_frontend *fe) |
6bca3580 | 61 | { |
66e6cd59 | 62 | struct dtv_frontend_properties *p = &fe->dtv_property_cache; |
6bca3580 AQ |
63 | struct tda826x_priv *priv = fe->tuner_priv; |
64 | int ret; | |
65 | u32 div; | |
3ff9a81b HH |
66 | u32 ksyms; |
67 | u32 bandwidth; | |
6bca3580 AQ |
68 | u8 buf [11]; |
69 | struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = buf, .len = 11 }; | |
70 | ||
271ddbf7 | 71 | dprintk("%s:\n", __func__); |
8b9a4664 | 72 | |
66e6cd59 | 73 | div = (p->frequency + (1000-1)) / 1000; |
6bca3580 | 74 | |
3ff9a81b HH |
75 | /* BW = ((1 + RO) * SR/2 + 5) * 1.3 [SR in MSPS, BW in MHz] */ |
76 | /* with R0 = 0.35 and some transformations: */ | |
66e6cd59 | 77 | ksyms = p->symbol_rate / 1000; |
3ff9a81b HH |
78 | bandwidth = (878 * ksyms + 6500000) / 1000000 + 1; |
79 | if (bandwidth < 5) | |
80 | bandwidth = 5; | |
81 | else if (bandwidth > 36) | |
82 | bandwidth = 36; | |
83 | ||
6bca3580 AQ |
84 | buf[0] = 0x00; // subaddress |
85 | buf[1] = 0x09; // powerdown RSSI + the magic value 1 | |
86 | if (!priv->has_loopthrough) | |
87 | buf[1] |= 0x20; // power down loopthrough if not needed | |
88 | buf[2] = (1<<5) | 0x0b; // 1Mhz + 0.45 VCO | |
89 | buf[3] = div >> 7; | |
90 | buf[4] = div << 1; | |
3ff9a81b | 91 | buf[5] = ((bandwidth - 5) << 3) | 7; /* baseband cut-off */ |
c6604150 | 92 | buf[6] = 0xfe; // baseband gain 9 db + no RF attenuation |
6bca3580 AQ |
93 | buf[7] = 0x83; // charge pumps at high, tests off |
94 | buf[8] = 0x80; // recommended value 4 for AMPVCO + disable ports. | |
95 | buf[9] = 0x1a; // normal caltime + recommended values for SELTH + SELVTL | |
96 | buf[10] = 0xd4; // recommended value 13 for BBIAS + unknown bit set on | |
97 | ||
98 | if (fe->ops.i2c_gate_ctrl) | |
99 | fe->ops.i2c_gate_ctrl(fe, 1); | |
100 | if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) { | |
271ddbf7 | 101 | dprintk("%s: i2c error\n", __func__); |
6bca3580 AQ |
102 | } |
103 | if (fe->ops.i2c_gate_ctrl) | |
104 | fe->ops.i2c_gate_ctrl(fe, 0); | |
105 | ||
106 | priv->frequency = div * 1000; | |
6bca3580 AQ |
107 | |
108 | return (ret == 1) ? 0 : ret; | |
109 | } | |
110 | ||
111 | static int tda826x_get_frequency(struct dvb_frontend *fe, u32 *frequency) | |
112 | { | |
113 | struct tda826x_priv *priv = fe->tuner_priv; | |
114 | *frequency = priv->frequency; | |
115 | return 0; | |
116 | } | |
117 | ||
14c4bf3c | 118 | static const struct dvb_tuner_ops tda826x_tuner_ops = { |
ef09c071 TP |
119 | .info = { |
120 | .name = "Philips TDA826X", | |
a3f90c75 MCC |
121 | .frequency_min_hz = 950 * MHz, |
122 | .frequency_max_hz = 2175 * MHz | |
ef09c071 | 123 | }, |
f2709c20 | 124 | .release = tda826x_release, |
6bca3580 AQ |
125 | .sleep = tda826x_sleep, |
126 | .set_params = tda826x_set_params, | |
127 | .get_frequency = tda826x_get_frequency, | |
128 | }; | |
129 | ||
130 | struct dvb_frontend *tda826x_attach(struct dvb_frontend *fe, int addr, struct i2c_adapter *i2c, int has_loopthrough) | |
131 | { | |
132 | struct tda826x_priv *priv = NULL; | |
133 | u8 b1 [] = { 0, 0 }; | |
8949f1a2 PB |
134 | struct i2c_msg msg[2] = { |
135 | { .addr = addr, .flags = 0, .buf = NULL, .len = 0 }, | |
136 | { .addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 2 } | |
137 | }; | |
6bca3580 AQ |
138 | int ret; |
139 | ||
271ddbf7 | 140 | dprintk("%s:\n", __func__); |
8b9a4664 | 141 | |
6bca3580 AQ |
142 | if (fe->ops.i2c_gate_ctrl) |
143 | fe->ops.i2c_gate_ctrl(fe, 1); | |
8949f1a2 | 144 | ret = i2c_transfer (i2c, msg, 2); |
6bca3580 AQ |
145 | if (fe->ops.i2c_gate_ctrl) |
146 | fe->ops.i2c_gate_ctrl(fe, 0); | |
147 | ||
8949f1a2 | 148 | if (ret != 2) |
6bca3580 AQ |
149 | return NULL; |
150 | if (!(b1[1] & 0x80)) | |
151 | return NULL; | |
152 | ||
153 | priv = kzalloc(sizeof(struct tda826x_priv), GFP_KERNEL); | |
154 | if (priv == NULL) | |
155 | return NULL; | |
156 | ||
157 | priv->i2c_address = addr; | |
158 | priv->i2c = i2c; | |
159 | priv->has_loopthrough = has_loopthrough; | |
160 | ||
161 | memcpy(&fe->ops.tuner_ops, &tda826x_tuner_ops, sizeof(struct dvb_tuner_ops)); | |
6bca3580 AQ |
162 | |
163 | fe->tuner_priv = priv; | |
6bca3580 AQ |
164 | |
165 | return fe; | |
166 | } | |
167 | EXPORT_SYMBOL(tda826x_attach); | |
168 | ||
8b9a4664 AQ |
169 | module_param(debug, int, 0644); |
170 | MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); | |
171 | ||
6bca3580 AQ |
172 | MODULE_DESCRIPTION("DVB TDA826x driver"); |
173 | MODULE_AUTHOR("Andrew de Quincey"); | |
174 | MODULE_LICENSE("GPL"); |