1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 Driver for ST STB6000 DVBS Silicon tuner
4
5 Copyright (C) 2008 Igor M. Liplianin (liplianin@me.by)
6
7
8 */
9
10 #include <linux/slab.h>
11 #include <linux/module.h>
12 #include <linux/dvb/frontend.h>
13 #include <asm/types.h>
14
15 #include "stb6000.h"
16
17 static int debug;
18 #define dprintk(args...) \
19 do { \
20 if (debug) \
21 printk(KERN_DEBUG "stb6000: " args); \
22 } while (0)
23
24 struct stb6000_priv {
25 /* i2c details */
26 int i2c_address;
27 struct i2c_adapter *i2c;
28 u32 frequency;
29 };
30
stb6000_release(struct dvb_frontend * fe)31 static void stb6000_release(struct dvb_frontend *fe)
32 {
33 kfree(fe->tuner_priv);
34 fe->tuner_priv = NULL;
35 }
36
stb6000_sleep(struct dvb_frontend * fe)37 static int stb6000_sleep(struct dvb_frontend *fe)
38 {
39 struct stb6000_priv *priv = fe->tuner_priv;
40 int ret;
41 u8 buf[] = { 10, 0 };
42 struct i2c_msg msg = {
43 .addr = priv->i2c_address,
44 .flags = 0,
45 .buf = buf,
46 .len = 2
47 };
48
49 dprintk("%s:\n", __func__);
50
51 if (fe->ops.i2c_gate_ctrl)
52 fe->ops.i2c_gate_ctrl(fe, 1);
53
54 ret = i2c_transfer(priv->i2c, &msg, 1);
55 if (ret != 1)
56 dprintk("%s: i2c error\n", __func__);
57
58 if (fe->ops.i2c_gate_ctrl)
59 fe->ops.i2c_gate_ctrl(fe, 0);
60
61 return (ret == 1) ? 0 : ret;
62 }
63
stb6000_set_params(struct dvb_frontend * fe)64 static int stb6000_set_params(struct dvb_frontend *fe)
65 {
66 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
67 struct stb6000_priv *priv = fe->tuner_priv;
68 unsigned int n, m;
69 int ret;
70 u32 freq_mhz;
71 int bandwidth;
72 u8 buf[12];
73 struct i2c_msg msg = {
74 .addr = priv->i2c_address,
75 .flags = 0,
76 .buf = buf,
77 .len = 12
78 };
79
80 dprintk("%s:\n", __func__);
81
82 freq_mhz = p->frequency / 1000;
83 bandwidth = p->symbol_rate / 1000000;
84
85 if (bandwidth > 31)
86 bandwidth = 31;
87
88 if ((freq_mhz > 949) && (freq_mhz < 2151)) {
89 buf[0] = 0x01;
90 buf[1] = 0xac;
91 if (freq_mhz < 1950)
92 buf[1] = 0xaa;
93 if (freq_mhz < 1800)
94 buf[1] = 0xa8;
95 if (freq_mhz < 1650)
96 buf[1] = 0xa6;
97 if (freq_mhz < 1530)
98 buf[1] = 0xa5;
99 if (freq_mhz < 1470)
100 buf[1] = 0xa4;
101 if (freq_mhz < 1370)
102 buf[1] = 0xa2;
103 if (freq_mhz < 1300)
104 buf[1] = 0xa1;
105 if (freq_mhz < 1200)
106 buf[1] = 0xa0;
107 if (freq_mhz < 1075)
108 buf[1] = 0xbc;
109 if (freq_mhz < 1000)
110 buf[1] = 0xba;
111 if (freq_mhz < 1075) {
112 n = freq_mhz / 8; /* vco=lo*4 */
113 m = 2;
114 } else {
115 n = freq_mhz / 16; /* vco=lo*2 */
116 m = 1;
117 }
118 buf[2] = n >> 1;
119 buf[3] = (unsigned char)(((n & 1) << 7) |
120 (m * freq_mhz - n * 16) | 0x60);
121 buf[4] = 0x04;
122 buf[5] = 0x0e;
123
124 buf[6] = (unsigned char)(bandwidth);
125
126 buf[7] = 0xd8;
127 buf[8] = 0xd0;
128 buf[9] = 0x50;
129 buf[10] = 0xeb;
130 buf[11] = 0x4f;
131
132 if (fe->ops.i2c_gate_ctrl)
133 fe->ops.i2c_gate_ctrl(fe, 1);
134
135 ret = i2c_transfer(priv->i2c, &msg, 1);
136 if (ret != 1)
137 dprintk("%s: i2c error\n", __func__);
138
139 udelay(10);
140 if (fe->ops.i2c_gate_ctrl)
141 fe->ops.i2c_gate_ctrl(fe, 0);
142
143 buf[0] = 0x07;
144 buf[1] = 0xdf;
145 buf[2] = 0xd0;
146 buf[3] = 0x50;
147 buf[4] = 0xfb;
148 msg.len = 5;
149
150 if (fe->ops.i2c_gate_ctrl)
151 fe->ops.i2c_gate_ctrl(fe, 1);
152
153 ret = i2c_transfer(priv->i2c, &msg, 1);
154 if (ret != 1)
155 dprintk("%s: i2c error\n", __func__);
156
157 udelay(10);
158 if (fe->ops.i2c_gate_ctrl)
159 fe->ops.i2c_gate_ctrl(fe, 0);
160
161 priv->frequency = freq_mhz * 1000;
162
163 return (ret == 1) ? 0 : ret;
164 }
165 return -1;
166 }
167
stb6000_get_frequency(struct dvb_frontend * fe,u32 * frequency)168 static int stb6000_get_frequency(struct dvb_frontend *fe, u32 *frequency)
169 {
170 struct stb6000_priv *priv = fe->tuner_priv;
171 *frequency = priv->frequency;
172 return 0;
173 }
174
175 static const struct dvb_tuner_ops stb6000_tuner_ops = {
176 .info = {
177 .name = "ST STB6000",
178 .frequency_min_hz = 950 * MHz,
179 .frequency_max_hz = 2150 * MHz
180 },
181 .release = stb6000_release,
182 .sleep = stb6000_sleep,
183 .set_params = stb6000_set_params,
184 .get_frequency = stb6000_get_frequency,
185 };
186
stb6000_attach(struct dvb_frontend * fe,int addr,struct i2c_adapter * i2c)187 struct dvb_frontend *stb6000_attach(struct dvb_frontend *fe, int addr,
188 struct i2c_adapter *i2c)
189 {
190 struct stb6000_priv *priv = NULL;
191 u8 b0[] = { 0 };
192 u8 b1[] = { 0, 0 };
193 struct i2c_msg msg[2] = {
194 {
195 .addr = addr,
196 .flags = 0,
197 .buf = b0,
198 .len = 0
199 }, {
200 .addr = addr,
201 .flags = I2C_M_RD,
202 .buf = b1,
203 .len = 2
204 }
205 };
206 int ret;
207
208 dprintk("%s:\n", __func__);
209
210 if (fe->ops.i2c_gate_ctrl)
211 fe->ops.i2c_gate_ctrl(fe, 1);
212
213 /* is some i2c device here ? */
214 ret = i2c_transfer(i2c, msg, 2);
215 if (fe->ops.i2c_gate_ctrl)
216 fe->ops.i2c_gate_ctrl(fe, 0);
217
218 if (ret != 2)
219 return NULL;
220
221 priv = kzalloc(sizeof(struct stb6000_priv), GFP_KERNEL);
222 if (priv == NULL)
223 return NULL;
224
225 priv->i2c_address = addr;
226 priv->i2c = i2c;
227
228 memcpy(&fe->ops.tuner_ops, &stb6000_tuner_ops,
229 sizeof(struct dvb_tuner_ops));
230
231 fe->tuner_priv = priv;
232
233 return fe;
234 }
235 EXPORT_SYMBOL(stb6000_attach);
236
237 module_param(debug, int, 0644);
238 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
239
240 MODULE_DESCRIPTION("DVB STB6000 driver");
241 MODULE_AUTHOR("Igor M. Liplianin <liplianin@me.by>");
242 MODULE_LICENSE("GPL");
243
