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12#include "dtt200u.h"
13
14struct dtt200u_fe_state {
15 struct dvb_usb_device *d;
16
17 fe_status_t stat;
18
19 struct dtv_frontend_properties fep;
20 struct dvb_frontend frontend;
21};
22
23static int dtt200u_fe_read_status(struct dvb_frontend* fe, fe_status_t *stat)
24{
25 struct dtt200u_fe_state *state = fe->demodulator_priv;
26 u8 st = GET_TUNE_STATUS, b[3];
27
28 dvb_usb_generic_rw(state->d,&st,1,b,3,0);
29
30 switch (b[0]) {
31 case 0x01:
32 *stat = FE_HAS_SIGNAL | FE_HAS_CARRIER |
33 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
34 break;
35 case 0x00:
36 *stat = FE_TIMEDOUT;
37 break;
38 default:
39 case 0x02:
40 *stat = 0;
41 break;
42 }
43 return 0;
44}
45
46static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
47{
48 struct dtt200u_fe_state *state = fe->demodulator_priv;
49 u8 bw = GET_VIT_ERR_CNT,b[3];
50 dvb_usb_generic_rw(state->d,&bw,1,b,3,0);
51 *ber = (b[0] << 16) | (b[1] << 8) | b[2];
52 return 0;
53}
54
55static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
56{
57 struct dtt200u_fe_state *state = fe->demodulator_priv;
58 u8 bw = GET_RS_UNCOR_BLK_CNT,b[2];
59
60 dvb_usb_generic_rw(state->d,&bw,1,b,2,0);
61 *unc = (b[0] << 8) | b[1];
62 return 0;
63}
64
65static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
66{
67 struct dtt200u_fe_state *state = fe->demodulator_priv;
68 u8 bw = GET_AGC, b;
69 dvb_usb_generic_rw(state->d,&bw,1,&b,1,0);
70 *strength = (b << 8) | b;
71 return 0;
72}
73
74static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
75{
76 struct dtt200u_fe_state *state = fe->demodulator_priv;
77 u8 bw = GET_SNR,br;
78 dvb_usb_generic_rw(state->d,&bw,1,&br,1,0);
79 *snr = ~((br << 8) | br);
80 return 0;
81}
82
83static int dtt200u_fe_init(struct dvb_frontend* fe)
84{
85 struct dtt200u_fe_state *state = fe->demodulator_priv;
86 u8 b = SET_INIT;
87 return dvb_usb_generic_write(state->d,&b,1);
88}
89
90static int dtt200u_fe_sleep(struct dvb_frontend* fe)
91{
92 return dtt200u_fe_init(fe);
93}
94
95static int dtt200u_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
96{
97 tune->min_delay_ms = 1500;
98 tune->step_size = 0;
99 tune->max_drift = 0;
100 return 0;
101}
102
103static int dtt200u_fe_set_frontend(struct dvb_frontend *fe)
104{
105 struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
106 struct dtt200u_fe_state *state = fe->demodulator_priv;
107 int i;
108 fe_status_t st;
109 u16 freq = fep->frequency / 250000;
110 u8 bwbuf[2] = { SET_BANDWIDTH, 0 },freqbuf[3] = { SET_RF_FREQ, 0, 0 };
111
112 switch (fep->bandwidth_hz) {
113 case 8000000:
114 bwbuf[1] = 8;
115 break;
116 case 7000000:
117 bwbuf[1] = 7;
118 break;
119 case 6000000:
120 bwbuf[1] = 6;
121 break;
122 default:
123 return -EINVAL;
124 }
125
126 dvb_usb_generic_write(state->d,bwbuf,2);
127
128 freqbuf[1] = freq & 0xff;
129 freqbuf[2] = (freq >> 8) & 0xff;
130 dvb_usb_generic_write(state->d,freqbuf,3);
131
132 for (i = 0; i < 30; i++) {
133 msleep(20);
134 dtt200u_fe_read_status(fe, &st);
135 if (st & FE_TIMEDOUT)
136 continue;
137 }
138
139 return 0;
140}
141
142static int dtt200u_fe_get_frontend(struct dvb_frontend* fe)
143{
144 struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
145 struct dtt200u_fe_state *state = fe->demodulator_priv;
146 memcpy(fep, &state->fep, sizeof(struct dtv_frontend_properties));
147 return 0;
148}
149
150static void dtt200u_fe_release(struct dvb_frontend* fe)
151{
152 struct dtt200u_fe_state *state = (struct dtt200u_fe_state*) fe->demodulator_priv;
153 kfree(state);
154}
155
156static struct dvb_frontend_ops dtt200u_fe_ops;
157
158struct dvb_frontend* dtt200u_fe_attach(struct dvb_usb_device *d)
159{
160 struct dtt200u_fe_state* state = NULL;
161
162
163 state = kzalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL);
164 if (state == NULL)
165 goto error;
166
167 deb_info("attaching frontend dtt200u\n");
168
169 state->d = d;
170
171 memcpy(&state->frontend.ops,&dtt200u_fe_ops,sizeof(struct dvb_frontend_ops));
172 state->frontend.demodulator_priv = state;
173
174 return &state->frontend;
175error:
176 return NULL;
177}
178
179static struct dvb_frontend_ops dtt200u_fe_ops = {
180 .delsys = { SYS_DVBT },
181 .info = {
182 .name = "WideView USB DVB-T",
183 .frequency_min = 44250000,
184 .frequency_max = 867250000,
185 .frequency_stepsize = 250000,
186 .caps = FE_CAN_INVERSION_AUTO |
187 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
188 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
189 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
190 FE_CAN_TRANSMISSION_MODE_AUTO |
191 FE_CAN_GUARD_INTERVAL_AUTO |
192 FE_CAN_RECOVER |
193 FE_CAN_HIERARCHY_AUTO,
194 },
195
196 .release = dtt200u_fe_release,
197
198 .init = dtt200u_fe_init,
199 .sleep = dtt200u_fe_sleep,
200
201 .set_frontend = dtt200u_fe_set_frontend,
202 .get_frontend = dtt200u_fe_get_frontend,
203 .get_tune_settings = dtt200u_fe_get_tune_settings,
204
205 .read_status = dtt200u_fe_read_status,
206 .read_ber = dtt200u_fe_read_ber,
207 .read_signal_strength = dtt200u_fe_read_signal_strength,
208 .read_snr = dtt200u_fe_read_snr,
209 .read_ucblocks = dtt200u_fe_read_unc_blocks,
210};
211
