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
|
/*
* lnbp21.h - driver for lnb supply and control ic lnbp21
*
* Copyright (C) 2006 Oliver Endriss
*
* 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.
*
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* Or, point your browser to http://www.gnu.org/copyleft/gpl.html
*
*
* the project's page is at http://www.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 "dvb_frontend.h"
#include "lnbp21.h"
struct lnbp21 {
u8 config;
u8 override_or;
u8 override_and;
struct i2c_adapter *i2c;
};
static int lnbp21_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
{
struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv;
struct i2c_msg msg = { .addr = 0x08, .flags = 0,
.buf = &lnbp21->config,
.len = sizeof(lnbp21->config) };
lnbp21->config &= ~(LNBP21_VSEL | LNBP21_EN);
switch(voltage) {
case SEC_VOLTAGE_OFF:
break;
case SEC_VOLTAGE_13:
lnbp21->config |= LNBP21_EN;
break;
case SEC_VOLTAGE_18:
lnbp21->config |= (LNBP21_EN | LNBP21_VSEL);
break;
default:
return -EINVAL;
};
lnbp21->config |= lnbp21->override_or;
lnbp21->config &= lnbp21->override_and;
return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
}
static int lnbp21_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
{
struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv;
struct i2c_msg msg = { .addr = 0x08, .flags = 0,
.buf = &lnbp21->config,
.len = sizeof(lnbp21->config) };
if (arg)
lnbp21->config |= LNBP21_LLC;
else
lnbp21->config &= ~LNBP21_LLC;
lnbp21->config |= lnbp21->override_or;
lnbp21->config &= lnbp21->override_and;
return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
}
static void lnbp21_release(struct dvb_frontend *fe)
{
/* LNBP power off */
lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF);
/* free data */
kfree(fe->sec_priv);
fe->sec_priv = NULL;
}
struct dvb_frontend *lnbp21_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 override_set, u8 override_clear)
{
struct lnbp21 *lnbp21 = kmalloc(sizeof(struct lnbp21), GFP_KERNEL);
if (!lnbp21)
return NULL;
/* default configuration */
lnbp21->config = LNBP21_ISEL;
lnbp21->i2c = i2c;
fe->sec_priv = lnbp21;
/* bits which should be forced to '1' */
lnbp21->override_or = override_set;
/* bits which should be forced to '0' */
lnbp21->override_and = ~override_clear;
/* detect if it is present or not */
if (lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF)) {
kfree(lnbp21);
return NULL;
}
/* install release callback */
fe->ops.release_sec = lnbp21_release;
/* override frontend ops */
fe->ops.set_voltage = lnbp21_set_voltage;
fe->ops.enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage;
return fe;
}
EXPORT_SYMBOL(lnbp21_attach);
MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp21");
MODULE_AUTHOR("Oliver Endriss");
MODULE_LICENSE("GPL");
|
