1 /* Frontend part of the Linux driver for the WideView/ Yakumo/ Hama/
2 * Typhoon/ Yuan DVB-T USB2.0 receiver.
4 * Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@desy.de>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation, version 2.
10 * see Documentation/dvb/README.dvb-usb for more information
14 struct dtt200u_fe_state {
15 struct dvb_usb_device *d;
19 struct dtv_frontend_properties fep;
20 struct dvb_frontend frontend;
23 static int dtt200u_fe_read_status(struct dvb_frontend *fe,
26 struct dtt200u_fe_state *state = fe->demodulator_priv;
27 u8 st = GET_TUNE_STATUS, b[3];
29 dvb_usb_generic_rw(state->d,&st,1,b,3,0);
33 *stat = FE_HAS_SIGNAL | FE_HAS_CARRIER |
34 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
36 case 0x00: /* pending */
37 *stat = FE_TIMEDOUT; /* during set_frontend */
40 case 0x02: /* failed */
47 static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
49 struct dtt200u_fe_state *state = fe->demodulator_priv;
50 u8 bw = GET_VIT_ERR_CNT,b[3];
51 dvb_usb_generic_rw(state->d,&bw,1,b,3,0);
52 *ber = (b[0] << 16) | (b[1] << 8) | b[2];
56 static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
58 struct dtt200u_fe_state *state = fe->demodulator_priv;
59 u8 bw = GET_RS_UNCOR_BLK_CNT,b[2];
61 dvb_usb_generic_rw(state->d,&bw,1,b,2,0);
62 *unc = (b[0] << 8) | b[1];
66 static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
68 struct dtt200u_fe_state *state = fe->demodulator_priv;
70 dvb_usb_generic_rw(state->d,&bw,1,&b,1,0);
71 *strength = (b << 8) | b;
75 static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
77 struct dtt200u_fe_state *state = fe->demodulator_priv;
79 dvb_usb_generic_rw(state->d,&bw,1,&br,1,0);
80 *snr = ~((br << 8) | br);
84 static int dtt200u_fe_init(struct dvb_frontend* fe)
86 struct dtt200u_fe_state *state = fe->demodulator_priv;
88 return dvb_usb_generic_write(state->d,&b,1);
91 static int dtt200u_fe_sleep(struct dvb_frontend* fe)
93 return dtt200u_fe_init(fe);
96 static int dtt200u_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
98 tune->min_delay_ms = 1500;
104 static int dtt200u_fe_set_frontend(struct dvb_frontend *fe)
106 struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
107 struct dtt200u_fe_state *state = fe->demodulator_priv;
110 u16 freq = fep->frequency / 250000;
111 u8 bwbuf[2] = { SET_BANDWIDTH, 0 },freqbuf[3] = { SET_RF_FREQ, 0, 0 };
113 switch (fep->bandwidth_hz) {
127 dvb_usb_generic_write(state->d,bwbuf,2);
129 freqbuf[1] = freq & 0xff;
130 freqbuf[2] = (freq >> 8) & 0xff;
131 dvb_usb_generic_write(state->d,freqbuf,3);
133 for (i = 0; i < 30; i++) {
135 dtt200u_fe_read_status(fe, &st);
136 if (st & FE_TIMEDOUT)
143 static int dtt200u_fe_get_frontend(struct dvb_frontend* fe)
145 struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
146 struct dtt200u_fe_state *state = fe->demodulator_priv;
147 memcpy(fep, &state->fep, sizeof(struct dtv_frontend_properties));
151 static void dtt200u_fe_release(struct dvb_frontend* fe)
153 struct dtt200u_fe_state *state = (struct dtt200u_fe_state*) fe->demodulator_priv;
157 static struct dvb_frontend_ops dtt200u_fe_ops;
159 struct dvb_frontend* dtt200u_fe_attach(struct dvb_usb_device *d)
161 struct dtt200u_fe_state* state = NULL;
163 /* allocate memory for the internal state */
164 state = kzalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL);
168 deb_info("attaching frontend dtt200u\n");
172 memcpy(&state->frontend.ops,&dtt200u_fe_ops,sizeof(struct dvb_frontend_ops));
173 state->frontend.demodulator_priv = state;
175 return &state->frontend;
180 static struct dvb_frontend_ops dtt200u_fe_ops = {
181 .delsys = { SYS_DVBT },
183 .name = "WideView USB DVB-T",
184 .frequency_min = 44250000,
185 .frequency_max = 867250000,
186 .frequency_stepsize = 250000,
187 .caps = FE_CAN_INVERSION_AUTO |
188 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
189 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
190 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
191 FE_CAN_TRANSMISSION_MODE_AUTO |
192 FE_CAN_GUARD_INTERVAL_AUTO |
194 FE_CAN_HIERARCHY_AUTO,
197 .release = dtt200u_fe_release,
199 .init = dtt200u_fe_init,
200 .sleep = dtt200u_fe_sleep,
202 .set_frontend = dtt200u_fe_set_frontend,
203 .get_frontend = dtt200u_fe_get_frontend,
204 .get_tune_settings = dtt200u_fe_get_tune_settings,
206 .read_status = dtt200u_fe_read_status,
207 .read_ber = dtt200u_fe_read_ber,
208 .read_signal_strength = dtt200u_fe_read_signal_strength,
209 .read_snr = dtt200u_fe_read_snr,
210 .read_ucblocks = dtt200u_fe_read_unc_blocks,