This source file includes following definitions.
- dtt200u_fe_read_status
- dtt200u_fe_read_ber
- dtt200u_fe_read_unc_blocks
- dtt200u_fe_read_signal_strength
- dtt200u_fe_read_snr
- dtt200u_fe_init
- dtt200u_fe_sleep
- dtt200u_fe_get_tune_settings
- dtt200u_fe_set_frontend
- dtt200u_fe_get_frontend
- dtt200u_fe_release
- dtt200u_fe_attach
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8
9 #include "dtt200u.h"
10
11 struct dtt200u_fe_state {
12 struct dvb_usb_device *d;
13
14 enum fe_status stat;
15
16 struct dtv_frontend_properties fep;
17 struct dvb_frontend frontend;
18
19 unsigned char data[80];
20 struct mutex data_mutex;
21 };
22
23 static int dtt200u_fe_read_status(struct dvb_frontend *fe,
24 enum fe_status *stat)
25 {
26 struct dtt200u_fe_state *state = fe->demodulator_priv;
27 int ret;
28
29 mutex_lock(&state->data_mutex);
30 state->data[0] = GET_TUNE_STATUS;
31
32 ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 3, 0);
33 if (ret < 0) {
34 *stat = 0;
35 mutex_unlock(&state->data_mutex);
36 return ret;
37 }
38
39 switch (state->data[0]) {
40 case 0x01:
41 *stat = FE_HAS_SIGNAL | FE_HAS_CARRIER |
42 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
43 break;
44 case 0x00:
45 *stat = FE_TIMEDOUT;
46 break;
47 default:
48 case 0x02:
49 *stat = 0;
50 break;
51 }
52 mutex_unlock(&state->data_mutex);
53 return 0;
54 }
55
56 static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
57 {
58 struct dtt200u_fe_state *state = fe->demodulator_priv;
59 int ret;
60
61 mutex_lock(&state->data_mutex);
62 state->data[0] = GET_VIT_ERR_CNT;
63
64 ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 3, 0);
65 if (ret >= 0)
66 *ber = (state->data[0] << 16) | (state->data[1] << 8) | state->data[2];
67
68 mutex_unlock(&state->data_mutex);
69 return ret;
70 }
71
72 static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
73 {
74 struct dtt200u_fe_state *state = fe->demodulator_priv;
75 int ret;
76
77 mutex_lock(&state->data_mutex);
78 state->data[0] = GET_RS_UNCOR_BLK_CNT;
79
80 ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 2, 0);
81 if (ret >= 0)
82 *unc = (state->data[0] << 8) | state->data[1];
83
84 mutex_unlock(&state->data_mutex);
85 return ret;
86 }
87
88 static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
89 {
90 struct dtt200u_fe_state *state = fe->demodulator_priv;
91 int ret;
92
93 mutex_lock(&state->data_mutex);
94 state->data[0] = GET_AGC;
95
96 ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 1, 0);
97 if (ret >= 0)
98 *strength = (state->data[0] << 8) | state->data[0];
99
100 mutex_unlock(&state->data_mutex);
101 return ret;
102 }
103
104 static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
105 {
106 struct dtt200u_fe_state *state = fe->demodulator_priv;
107 int ret;
108
109 mutex_lock(&state->data_mutex);
110 state->data[0] = GET_SNR;
111
112 ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 1, 0);
113 if (ret >= 0)
114 *snr = ~((state->data[0] << 8) | state->data[0]);
115
116 mutex_unlock(&state->data_mutex);
117 return ret;
118 }
119
120 static int dtt200u_fe_init(struct dvb_frontend* fe)
121 {
122 struct dtt200u_fe_state *state = fe->demodulator_priv;
123 int ret;
124
125 mutex_lock(&state->data_mutex);
126 state->data[0] = SET_INIT;
127
128 ret = dvb_usb_generic_write(state->d, state->data, 1);
129 mutex_unlock(&state->data_mutex);
130
131 return ret;
132 }
133
134 static int dtt200u_fe_sleep(struct dvb_frontend* fe)
135 {
136 return dtt200u_fe_init(fe);
137 }
138
139 static int dtt200u_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
140 {
141 tune->min_delay_ms = 1500;
142 tune->step_size = 0;
143 tune->max_drift = 0;
144 return 0;
145 }
146
147 static int dtt200u_fe_set_frontend(struct dvb_frontend *fe)
148 {
149 struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
150 struct dtt200u_fe_state *state = fe->demodulator_priv;
151 int ret;
152 u16 freq = fep->frequency / 250000;
153
154 mutex_lock(&state->data_mutex);
155 state->data[0] = SET_BANDWIDTH;
156 switch (fep->bandwidth_hz) {
157 case 8000000:
158 state->data[1] = 8;
159 break;
160 case 7000000:
161 state->data[1] = 7;
162 break;
163 case 6000000:
164 state->data[1] = 6;
165 break;
166 default:
167 ret = -EINVAL;
168 goto ret;
169 }
170
171 ret = dvb_usb_generic_write(state->d, state->data, 2);
172 if (ret < 0)
173 goto ret;
174
175 state->data[0] = SET_RF_FREQ;
176 state->data[1] = freq & 0xff;
177 state->data[2] = (freq >> 8) & 0xff;
178 ret = dvb_usb_generic_write(state->d, state->data, 3);
179 if (ret < 0)
180 goto ret;
181
182 ret:
183 mutex_unlock(&state->data_mutex);
184 return ret;
185 }
186
187 static int dtt200u_fe_get_frontend(struct dvb_frontend* fe,
188 struct dtv_frontend_properties *fep)
189 {
190 struct dtt200u_fe_state *state = fe->demodulator_priv;
191
192 memcpy(fep, &state->fep, sizeof(struct dtv_frontend_properties));
193 return 0;
194 }
195
196 static void dtt200u_fe_release(struct dvb_frontend* fe)
197 {
198 struct dtt200u_fe_state *state = (struct dtt200u_fe_state*) fe->demodulator_priv;
199 kfree(state);
200 }
201
202 static const struct dvb_frontend_ops dtt200u_fe_ops;
203
204 struct dvb_frontend* dtt200u_fe_attach(struct dvb_usb_device *d)
205 {
206 struct dtt200u_fe_state* state = NULL;
207
208
209 state = kzalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL);
210 if (state == NULL)
211 goto error;
212
213 deb_info("attaching frontend dtt200u\n");
214
215 state->d = d;
216 mutex_init(&state->data_mutex);
217
218 memcpy(&state->frontend.ops,&dtt200u_fe_ops,sizeof(struct dvb_frontend_ops));
219 state->frontend.demodulator_priv = state;
220
221 return &state->frontend;
222 error:
223 return NULL;
224 }
225
226 static const struct dvb_frontend_ops dtt200u_fe_ops = {
227 .delsys = { SYS_DVBT },
228 .info = {
229 .name = "WideView USB DVB-T",
230 .frequency_min_hz = 44250 * kHz,
231 .frequency_max_hz = 867250 * kHz,
232 .frequency_stepsize_hz = 250 * kHz,
233 .caps = FE_CAN_INVERSION_AUTO |
234 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
235 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
236 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
237 FE_CAN_TRANSMISSION_MODE_AUTO |
238 FE_CAN_GUARD_INTERVAL_AUTO |
239 FE_CAN_RECOVER |
240 FE_CAN_HIERARCHY_AUTO,
241 },
242
243 .release = dtt200u_fe_release,
244
245 .init = dtt200u_fe_init,
246 .sleep = dtt200u_fe_sleep,
247
248 .set_frontend = dtt200u_fe_set_frontend,
249 .get_frontend = dtt200u_fe_get_frontend,
250 .get_tune_settings = dtt200u_fe_get_tune_settings,
251
252 .read_status = dtt200u_fe_read_status,
253 .read_ber = dtt200u_fe_read_ber,
254 .read_signal_strength = dtt200u_fe_read_signal_strength,
255 .read_snr = dtt200u_fe_read_snr,
256 .read_ucblocks = dtt200u_fe_read_unc_blocks,
257 };