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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
// SPDX-License-Identifier: GPL-2.0-only
/* Frontend part of the Linux driver for the WideView/ Yakumo/ Hama/
* Typhoon/ Yuan DVB-T USB2.0 receiver.
*
* Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@posteo.de>
*
* see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
*/
#include "dtt200u.h"
struct dtt200u_fe_state {
struct dvb_usb_device *d;
enum fe_status stat;
struct dtv_frontend_properties fep;
struct dvb_frontend frontend;
unsigned char data[80];
struct mutex data_mutex;
};
static int dtt200u_fe_read_status(struct dvb_frontend *fe,
enum fe_status *stat)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
int ret;
mutex_lock(&state->data_mutex);
state->data[0] = GET_TUNE_STATUS;
ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 3, 0);
if (ret < 0) {
*stat = 0;
mutex_unlock(&state->data_mutex);
return ret;
}
switch (state->data[0]) {
case 0x01:
*stat = FE_HAS_SIGNAL | FE_HAS_CARRIER |
FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
break;
case 0x00: /* pending */
*stat = FE_TIMEDOUT; /* during set_frontend */
break;
default:
case 0x02: /* failed */
*stat = 0;
break;
}
mutex_unlock(&state->data_mutex);
return 0;
}
static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
int ret;
mutex_lock(&state->data_mutex);
state->data[0] = GET_VIT_ERR_CNT;
ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 3, 0);
if (ret >= 0)
*ber = (state->data[0] << 16) | (state->data[1] << 8) | state->data[2];
mutex_unlock(&state->data_mutex);
return ret;
}
static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
int ret;
mutex_lock(&state->data_mutex);
state->data[0] = GET_RS_UNCOR_BLK_CNT;
ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 2, 0);
if (ret >= 0)
*unc = (state->data[0] << 8) | state->data[1];
mutex_unlock(&state->data_mutex);
return ret;
}
static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
int ret;
mutex_lock(&state->data_mutex);
state->data[0] = GET_AGC;
ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 1, 0);
if (ret >= 0)
*strength = (state->data[0] << 8) | state->data[0];
mutex_unlock(&state->data_mutex);
return ret;
}
static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
int ret;
mutex_lock(&state->data_mutex);
state->data[0] = GET_SNR;
ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 1, 0);
if (ret >= 0)
*snr = ~((state->data[0] << 8) | state->data[0]);
mutex_unlock(&state->data_mutex);
return ret;
}
static int dtt200u_fe_init(struct dvb_frontend* fe)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
int ret;
mutex_lock(&state->data_mutex);
state->data[0] = SET_INIT;
ret = dvb_usb_generic_write(state->d, state->data, 1);
mutex_unlock(&state->data_mutex);
return ret;
}
static int dtt200u_fe_sleep(struct dvb_frontend* fe)
{
return dtt200u_fe_init(fe);
}
static int dtt200u_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
{
tune->min_delay_ms = 1500;
tune->step_size = 0;
tune->max_drift = 0;
return 0;
}
static int dtt200u_fe_set_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
struct dtt200u_fe_state *state = fe->demodulator_priv;
int ret;
u16 freq = fep->frequency / 250000;
mutex_lock(&state->data_mutex);
state->data[0] = SET_BANDWIDTH;
switch (fep->bandwidth_hz) {
case 8000000:
state->data[1] = 8;
break;
case 7000000:
state->data[1] = 7;
break;
case 6000000:
state->data[1] = 6;
break;
default:
ret = -EINVAL;
goto ret;
}
ret = dvb_usb_generic_write(state->d, state->data, 2);
if (ret < 0)
goto ret;
state->data[0] = SET_RF_FREQ;
state->data[1] = freq & 0xff;
state->data[2] = (freq >> 8) & 0xff;
ret = dvb_usb_generic_write(state->d, state->data, 3);
if (ret < 0)
goto ret;
ret:
mutex_unlock(&state->data_mutex);
return ret;
}
static int dtt200u_fe_get_frontend(struct dvb_frontend* fe,
struct dtv_frontend_properties *fep)
{
struct dtt200u_fe_state *state = fe->demodulator_priv;
memcpy(fep, &state->fep, sizeof(struct dtv_frontend_properties));
return 0;
}
static void dtt200u_fe_release(struct dvb_frontend* fe)
{
struct dtt200u_fe_state *state = (struct dtt200u_fe_state*) fe->demodulator_priv;
kfree(state);
}
static const struct dvb_frontend_ops dtt200u_fe_ops;
struct dvb_frontend* dtt200u_fe_attach(struct dvb_usb_device *d)
{
struct dtt200u_fe_state* state = NULL;
/* allocate memory for the internal state */
state = kzalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL);
if (state == NULL)
goto error;
deb_info("attaching frontend dtt200u\n");
state->d = d;
mutex_init(&state->data_mutex);
memcpy(&state->frontend.ops,&dtt200u_fe_ops,sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
error:
return NULL;
}
static const struct dvb_frontend_ops dtt200u_fe_ops = {
.delsys = { SYS_DVBT },
.info = {
.name = "WideView USB DVB-T",
.frequency_min_hz = 44250 * kHz,
.frequency_max_hz = 867250 * kHz,
.frequency_stepsize_hz = 250 * kHz,
.caps = FE_CAN_INVERSION_AUTO |
FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_RECOVER |
FE_CAN_HIERARCHY_AUTO,
},
.release = dtt200u_fe_release,
.init = dtt200u_fe_init,
.sleep = dtt200u_fe_sleep,
.set_frontend = dtt200u_fe_set_frontend,
.get_frontend = dtt200u_fe_get_frontend,
.get_tune_settings = dtt200u_fe_get_tune_settings,
.read_status = dtt200u_fe_read_status,
.read_ber = dtt200u_fe_read_ber,
.read_signal_strength = dtt200u_fe_read_signal_strength,
.read_snr = dtt200u_fe_read_snr,
.read_ucblocks = dtt200u_fe_read_unc_blocks,
};
|
