tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Support for LGDT3305 - VSB/QAM
3 *
4 * Copyright (C) 2008, 2009 Michael Krufky <mkrufky@linuxtv.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 */
21
22#ifndef _LGDT3305_H_
23#define _LGDT3305_H_
24
25#include <linux/i2c.h>
26#include "dvb_frontend.h"
27
28
29enum lgdt3305_mpeg_mode {
30 LGDT3305_MPEG_PARALLEL = 0,
31 LGDT3305_MPEG_SERIAL = 1,
32};
33
34enum lgdt3305_tp_clock_edge {
35 LGDT3305_TPCLK_RISING_EDGE = 0,
36 LGDT3305_TPCLK_FALLING_EDGE = 1,
37};
38
39enum lgdt3305_tp_valid_polarity {
40 LGDT3305_TP_VALID_LOW = 0,
41 LGDT3305_TP_VALID_HIGH = 1,
42};
43
44struct lgdt3305_config {
45 u8 i2c_addr;
46
47 /* user defined IF frequency in KHz */
48 u16 qam_if_khz;
49 u16 vsb_if_khz;
50
51 /* AGC Power reference - defaults are used if left unset */
52 u16 usref_8vsb; /* default: 0x32c4 */
53 u16 usref_qam64; /* default: 0x5400 */
54 u16 usref_qam256; /* default: 0x2a80 */
55
56 /* disable i2c repeater - 0:repeater enabled 1:repeater disabled */
57 int deny_i2c_rptr:1;
58
59 /* spectral inversion - 0:disabled 1:enabled */
60 int spectral_inversion:1;
61
62 /* use RF AGC loop - 0:disabled 1:enabled */
63 int rf_agc_loop:1;
64
65 enum lgdt3305_mpeg_mode mpeg_mode;
66 enum lgdt3305_tp_clock_edge tpclk_edge;
67 enum lgdt3305_tp_valid_polarity tpvalid_polarity;
68};
69
70#if defined(CONFIG_DVB_LGDT3305) || (defined(CONFIG_DVB_LGDT3305_MODULE) && \
71 defined(MODULE))
72extern
73struct dvb_frontend *lgdt3305_attach(const struct lgdt3305_config *config,
74 struct i2c_adapter *i2c_adap);
75#else
76static inline
77struct dvb_frontend *lgdt3305_attach(const struct lgdt3305_config *config,
78 struct i2c_adapter *i2c_adap)
79{
80 printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
81 return NULL;
82}
83#endif /* CONFIG_DVB_LGDT3305 */
84
85#endif /* _LGDT3305_H_ */