1 /*
2 * Copyright (c) 2004-2007 Marcus Overhagen <marcus@overhagen.de>
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without restriction,
7 * including without limitation the rights to use, copy, modify,
8 * merge, publish, distribute, sublicense, and/or sell copies of
9 * the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
17 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
19 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include <KernelExport.h>
26 #include "dtt7592.h"
27 #include "config.h"
28
29 #define TRACE_DTT7592
30 #ifdef TRACE_DTT7592
31 #define TRACE dprintf
32 #else
33 #define TRACE(a...)
34 #endif
35
36
37 status_t
dtt7592_write(i2c_bus * bus,const uint8 data[4])38 dtt7592_write(i2c_bus *bus, const uint8 data[4])
39 {
40 status_t res;
41 TRACE("dtt7592_write values 0x%02x 0x%02x 0x%02x 0x%02x\n", data[0], data[1], data[2], data[3]);
42 res = i2c_write(bus, I2C_ADDR_PLL, data, 4);
43 if (res != B_OK)
44 TRACE("dtt7592_write error, values 0x%02x 0x%02x 0x%02x 0x%02x\n", data[0], data[1], data[2], data[3]);
45 return res;
46 }
47
48
49 status_t
dtt7592_read(i2c_bus * bus,uint8 * data)50 dtt7592_read(i2c_bus *bus, uint8 *data)
51 {
52 status_t res;
53 res = i2c_read(bus, I2C_ADDR_PLL, data, 1);
54 if (res != B_OK)
55 TRACE("dtt7592_read error\n");
56 return res;
57 }
58
59
60 status_t
dtt7592_set_frequency(i2c_bus * bus,uint32 frequency,dvb_bandwidth_t bandwidth)61 dtt7592_set_frequency(i2c_bus *bus, uint32 frequency, dvb_bandwidth_t bandwidth)
62 {
63 status_t res;
64 uint32 divider;
65 uint8 data[4];
66
67 divider = (frequency + 36083333) / 166666;
68 if (divider > 0x7fff)
69 divider = 0x7fff;
70
71 TRACE("dtt7592_set_frequency frequency %" B_PRId32 ", divider 0x%"
72 B_PRIx32 " (%" B_PRId32 ")\n", frequency, divider, divider);
73
74 data[0] = divider >> 8;
75 data[1] = (uint8)divider;
76
77 if (frequency > 835000000)
78 data[2] = 0xfc;
79 else if (frequency > 735000000)
80 data[2] = 0xf4;
81 else if (frequency > 465000000)
82 data[2] = 0xbc;
83 else if (frequency > 445000000)
84 data[2] = 0xfc;
85 else if (frequency > 405000000)
86 data[2] = 0xf4;
87 else if (frequency > 305000000)
88 data[2] = 0xbc;
89 else
90 data[2] = 0xb4;
91
92 if (frequency > 429000000)
93 data[3] = 0x08; // select UHF IV/V
94 else
95 data[3] = 0x02; // select VHF III
96
97 // only used in Germany right now, where VHF channels
98 // are 7 MHz wide, while UHF are 8 MHz.
99 if (bandwidth == DVB_BANDWIDTH_5_MHZ
100 || bandwidth == DVB_BANDWIDTH_6_MHZ
101 || bandwidth == DVB_BANDWIDTH_7_MHZ) {
102 data[3] |= 0x10; // activate 7 Mhz filter
103 }
104
105 res = dtt7592_write(bus, data);
106 if (res != B_OK) {
107 dprintf("dtt7592_set_frequency step 1 failed\n");
108 return res;
109 }
110
111 // enable AGC
112 data[2] = (data[2] & 0x40) | 0x9c;
113 data[3] = 0xa0;
114 res = dtt7592_write(bus, data);
115 if (res != B_OK) {
116 dprintf("dtt7592_set_frequency step 2 failed\n");
117 return res;
118 }
119
120 // wait 100 ms
121 snooze(100000);
122
123 // disable AGC
124 data[3] = 0x20;
125 res = dtt7592_write(bus, data);
126 if (res != B_OK) {
127 dprintf("dtt7592_set_frequency step 3 failed\n");
128 return res;
129 }
130
131 return B_OK;
132 }
133
134
135 #if 0
136 void
137 dtt7582_dump(i2c_bus *bus)
138 {
139 uint8 data;
140 if (B_OK != dtt7592_read(bus, &data)) {
141 TRACE("dtt7582_dump failed\n");
142 }
143 TRACE("dtt7582_dump: 0x%02x, PLL %s, AGC %s\n", data, (data & 0x40) ? "locked" : "open", (data & 0x08) ? "active" : "off");
144 }
145
146
147 void
148 dtt7582_test(i2c_bus *bus)
149 {
150 TRACE("dtt7582_test start\n");
151 dtt7582_dump(bus);
152 TRACE("dtt7582_test freq 1\n");
153 dtt7592_set_frequency(bus, 150000000, DVB_BANDWIDTH_7_MHZ);
154 dtt7582_dump(bus);
155 TRACE("dtt7582_test freq 2\n");
156 dtt7592_set_frequency(bus, 746000000, DVB_BANDWIDTH_8_MHZ); // Kabel 1
157 dtt7582_dump(bus);
158 TRACE("dtt7582_test freq 3\n");
159 dtt7592_set_frequency(bus, 538000000, DVB_BANDWIDTH_7_MHZ); // VOX
160 dtt7582_dump(bus);
161 TRACE("dtt7582_test freq 4\n");
162 dtt7592_set_frequency(bus, 896000000, DVB_BANDWIDTH_8_MHZ);
163 dtt7582_dump(bus);
164 TRACE("dtt7582_test freq 5\n");
165 dtt7592_set_frequency(bus, 333000000, DVB_BANDWIDTH_7_MHZ);
166 dtt7582_dump(bus);
167 }
168 #endif
169