1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
* lnbp22.h - driver for lnb supply and control ic lnbp22
*
* Copyright (C) 2006 Dominik Kuhlen
* Based on lnbp21 driver
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* To obtain the license, point your browser to
* http://www.gnu.org/copyleft/gpl.html
*
*
* the project's page is at https://linuxtv.org
*/
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <media/dvb_frontend.h>
#include "lnbp22.h"
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
#define dprintk(lvl, arg...) if (debug >= (lvl)) printk(arg)
struct lnbp22 {
u8 config[4];
struct i2c_adapter *i2c;
};
static int lnbp22_set_voltage(struct dvb_frontend *fe,
enum fe_sec_voltage voltage)
{
struct lnbp22 *lnbp22 = (struct lnbp22 *)fe->sec_priv;
struct i2c_msg msg = {
.addr = 0x08,
.flags = 0,
.buf = (char *)&lnbp22->config,
.len = sizeof(lnbp22->config),
};
dprintk(1, "%s: %d (18V=%d 13V=%d)\n", __func__, voltage,
SEC_VOLTAGE_18, SEC_VOLTAGE_13);
lnbp22->config[3] = 0x60; /* Power down */
switch (voltage) {
case SEC_VOLTAGE_OFF:
break;
case SEC_VOLTAGE_13:
lnbp22->config[3] |= LNBP22_EN;
break;
case SEC_VOLTAGE_18:
lnbp22->config[3] |= (LNBP22_EN | LNBP22_VSEL);
break;
default:
return -EINVAL;
}
dprintk(1, "%s: 0x%02x)\n", __func__, lnbp22->config[3]);
return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
}
static int lnbp22_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
{
struct lnbp22 *lnbp22 = (struct lnbp22 *) fe->sec_priv;
struct i2c_msg msg = {
.addr = 0x08,
.flags = 0,
.buf = (char *)&lnbp22->config,
.len = sizeof(lnbp22->config),
};
dprintk(1, "%s: %d\n", __func__, (int)arg);
if (arg)
lnbp22->config[3] |= LNBP22_LLC;
else
lnbp22->config[3] &= ~LNBP22_LLC;
return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
}
static void lnbp22_release(struct dvb_frontend *fe)
{
dprintk(1, "%s\n", __func__);
/* LNBP power off */
lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF);
/* free data */
kfree(fe->sec_priv);
fe->sec_priv = NULL;
}
struct dvb_frontend *lnbp22_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c)
{
struct lnbp22 *lnbp22 = kmalloc(sizeof(struct lnbp22), GFP_KERNEL);
if (!lnbp22)
return NULL;
/* default configuration */
lnbp22->config[0] = 0x00; /* ? */
lnbp22->config[1] = 0x28; /* ? */
lnbp22->config[2] = 0x48; /* ? */
lnbp22->config[3] = 0x60; /* Power down */
lnbp22->i2c = i2c;
fe->sec_priv = lnbp22;
/* detect if it is present or not */
if (lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF)) {
dprintk(0, "%s LNBP22 not found\n", __func__);
kfree(lnbp22);
fe->sec_priv = NULL;
return NULL;
}
/* install release callback */
fe->ops.release_sec = lnbp22_release;
/* override frontend ops */
fe->ops.set_voltage = lnbp22_set_voltage;
fe->ops.enable_high_lnb_voltage = lnbp22_enable_high_lnb_voltage;
return fe;
}
EXPORT_SYMBOL(lnbp22_attach);
MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp22");
MODULE_AUTHOR("Dominik Kuhlen");
MODULE_LICENSE("GPL");
|
