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
147
148
149
150
151
152
153
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for Dummy Frontend
*
* Written by Emard <emard@softhome.net>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <media/dvb_frontend.h>
#include "ddbridge-dummy-fe.h"
struct ddbridge_dummy_fe_state {
struct dvb_frontend frontend;
};
static int ddbridge_dummy_fe_read_status(struct dvb_frontend *fe,
enum fe_status *status)
{
*status = FE_HAS_SIGNAL
| FE_HAS_CARRIER
| FE_HAS_VITERBI
| FE_HAS_SYNC
| FE_HAS_LOCK;
return 0;
}
static int ddbridge_dummy_fe_read_ber(struct dvb_frontend *fe, u32 *ber)
{
*ber = 0;
return 0;
}
static int ddbridge_dummy_fe_read_signal_strength(struct dvb_frontend *fe,
u16 *strength)
{
*strength = 0;
return 0;
}
static int ddbridge_dummy_fe_read_snr(struct dvb_frontend *fe, u16 *snr)
{
*snr = 0;
return 0;
}
static int ddbridge_dummy_fe_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
*ucblocks = 0;
return 0;
}
/*
* Should only be implemented if it actually reads something from the hardware.
* Also, it should check for the locks, in order to avoid report wrong data
* to userspace.
*/
static int ddbridge_dummy_fe_get_frontend(struct dvb_frontend *fe,
struct dtv_frontend_properties *p)
{
return 0;
}
static int ddbridge_dummy_fe_set_frontend(struct dvb_frontend *fe)
{
if (fe->ops.tuner_ops.set_params) {
fe->ops.tuner_ops.set_params(fe);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
}
return 0;
}
static int ddbridge_dummy_fe_sleep(struct dvb_frontend *fe)
{
return 0;
}
static int ddbridge_dummy_fe_init(struct dvb_frontend *fe)
{
return 0;
}
static void ddbridge_dummy_fe_release(struct dvb_frontend *fe)
{
struct ddbridge_dummy_fe_state *state = fe->demodulator_priv;
kfree(state);
}
static const struct dvb_frontend_ops ddbridge_dummy_fe_qam_ops;
struct dvb_frontend *ddbridge_dummy_fe_qam_attach(void)
{
struct ddbridge_dummy_fe_state *state = NULL;
/* allocate memory for the internal state */
state = kzalloc(sizeof(struct ddbridge_dummy_fe_state), GFP_KERNEL);
if (!state)
return NULL;
/* create dvb_frontend */
memcpy(&state->frontend.ops,
&ddbridge_dummy_fe_qam_ops,
sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
}
EXPORT_SYMBOL_GPL(ddbridge_dummy_fe_qam_attach);
static const struct dvb_frontend_ops ddbridge_dummy_fe_qam_ops = {
.delsys = { SYS_DVBC_ANNEX_A },
.info = {
.name = "ddbridge dummy DVB-C",
.frequency_min_hz = 51 * MHz,
.frequency_max_hz = 858 * MHz,
.frequency_stepsize_hz = 62500,
/* symbol_rate_min: SACLK/64 == (XIN/2)/64 */
.symbol_rate_min = (57840000 / 2) / 64,
.symbol_rate_max = (57840000 / 2) / 4, /* SACLK/4 */
.caps = FE_CAN_QAM_16 |
FE_CAN_QAM_32 |
FE_CAN_QAM_64 |
FE_CAN_QAM_128 |
FE_CAN_QAM_256 |
FE_CAN_FEC_AUTO |
FE_CAN_INVERSION_AUTO
},
.release = ddbridge_dummy_fe_release,
.init = ddbridge_dummy_fe_init,
.sleep = ddbridge_dummy_fe_sleep,
.set_frontend = ddbridge_dummy_fe_set_frontend,
.get_frontend = ddbridge_dummy_fe_get_frontend,
.read_status = ddbridge_dummy_fe_read_status,
.read_ber = ddbridge_dummy_fe_read_ber,
.read_signal_strength = ddbridge_dummy_fe_read_signal_strength,
.read_snr = ddbridge_dummy_fe_read_snr,
.read_ucblocks = ddbridge_dummy_fe_read_ucblocks,
};
MODULE_DESCRIPTION("ddbridge dummy Frontend");
MODULE_AUTHOR("Emard");
MODULE_LICENSE("GPL");
|
