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
37status_t
38dtt7592_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
49status_t
50dtt7592_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
60status_t
61dtt7592_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 %ld, divider 0x%lx (%ld)\n", frequency, divider, divider);
72
73	data[0] = divider >> 8;
74	data[1] = (uint8)divider;
75
76	if (frequency > 835000000)
77		data[2] = 0xfc;
78	else if (frequency > 735000000)
79		data[2] = 0xf4;
80	else if (frequency > 465000000)
81		data[2] = 0xbc;
82	else if (frequency > 445000000)
83		data[2] = 0xfc;
84	else if (frequency > 405000000)
85		data[2] = 0xf4;
86	else if (frequency > 305000000)
87		data[2] = 0xbc;
88	else
89		data[2] = 0xb4;
90
91	if (frequency > 429000000)
92		data[3] = 0x08; // select UHF IV/V
93	else
94		data[3] = 0x02; // select VHF III
95
96	// only used in Germany right now, where VHF channels
97	// are 7 MHz wide, while UHF are 8 MHz.
98	if (bandwidth == DVB_BANDWIDTH_5_MHZ
99		|| bandwidth == DVB_BANDWIDTH_6_MHZ
100		|| bandwidth == DVB_BANDWIDTH_7_MHZ) {
101		data[3] |= 0x10; // activate 7 Mhz filter
102	}
103
104	res = dtt7592_write(bus, data);
105	if (res != B_OK) {
106		dprintf("dtt7592_set_frequency step 1 failed\n");
107		return res;
108	}
109
110	// enable AGC
111	data[2] = (data[2] & 0x40) | 0x9c;
112	data[3] = 0xa0;
113	res = dtt7592_write(bus, data);
114	if (res != B_OK) {
115		dprintf("dtt7592_set_frequency step 2 failed\n");
116		return res;
117	}
118
119	// wait 100 ms
120	snooze(100000);
121
122	// disable AGC
123	data[3] = 0x20;
124	res = dtt7592_write(bus, data);
125	if (res != B_OK) {
126		dprintf("dtt7592_set_frequency step 3 failed\n");
127		return res;
128	}
129
130	return B_OK;
131}
132
133
134#if 0
135void
136dtt7582_dump(i2c_bus *bus)
137{
138	uint8 data;
139	if (B_OK != dtt7592_read(bus, &data)) {
140		TRACE("dtt7582_dump failed\n");
141	}
142	TRACE("dtt7582_dump: 0x%02x, PLL %s, AGC %s\n", data, (data & 0x40) ? "locked" : "open", (data & 0x08) ? "active" : "off");
143}
144
145
146void
147dtt7582_test(i2c_bus *bus)
148{
149	TRACE("dtt7582_test start\n");
150	dtt7582_dump(bus);
151	TRACE("dtt7582_test freq 1\n");
152	dtt7592_set_frequency(bus, 150000000, DVB_BANDWIDTH_7_MHZ);
153	dtt7582_dump(bus);
154	TRACE("dtt7582_test freq 2\n");
155	dtt7592_set_frequency(bus, 746000000, DVB_BANDWIDTH_8_MHZ); // Kabel 1
156	dtt7582_dump(bus);
157	TRACE("dtt7582_test freq 3\n");
158	dtt7592_set_frequency(bus, 538000000, DVB_BANDWIDTH_7_MHZ); // VOX
159	dtt7582_dump(bus);
160	TRACE("dtt7582_test freq 4\n");
161	dtt7592_set_frequency(bus, 896000000, DVB_BANDWIDTH_8_MHZ);
162	dtt7582_dump(bus);
163	TRACE("dtt7582_test freq 5\n");
164	dtt7592_set_frequency(bus, 333000000, DVB_BANDWIDTH_7_MHZ);
165	dtt7582_dump(bus);
166}
167#endif
168