| /* 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@desy.de> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the Free |
| * Software Foundation, version 2. |
| * |
| * see Documentation/dvb/README.dvb-usb for more information |
| */ |
| #include "dtt200u.h" |
| |
| struct dtt200u_fe_state { |
| struct dvb_usb_device *d; |
| |
| fe_status_t stat; |
| |
| struct dtv_frontend_properties fep; |
| struct dvb_frontend frontend; |
| }; |
| |
| static int dtt200u_fe_read_status(struct dvb_frontend* fe, fe_status_t *stat) |
| { |
| struct dtt200u_fe_state *state = fe->demodulator_priv; |
| u8 st = GET_TUNE_STATUS, b[3]; |
| |
| dvb_usb_generic_rw(state->d,&st,1,b,3,0); |
| |
| switch (b[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; |
| } |
| return 0; |
| } |
| |
| static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber) |
| { |
| struct dtt200u_fe_state *state = fe->demodulator_priv; |
| u8 bw = GET_VIT_ERR_CNT,b[3]; |
| dvb_usb_generic_rw(state->d,&bw,1,b,3,0); |
| *ber = (b[0] << 16) | (b[1] << 8) | b[2]; |
| return 0; |
| } |
| |
| static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc) |
| { |
| struct dtt200u_fe_state *state = fe->demodulator_priv; |
| u8 bw = GET_RS_UNCOR_BLK_CNT,b[2]; |
| |
| dvb_usb_generic_rw(state->d,&bw,1,b,2,0); |
| *unc = (b[0] << 8) | b[1]; |
| return 0; |
| } |
| |
| static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength) |
| { |
| struct dtt200u_fe_state *state = fe->demodulator_priv; |
| u8 bw = GET_AGC, b; |
| dvb_usb_generic_rw(state->d,&bw,1,&b,1,0); |
| *strength = (b << 8) | b; |
| return 0; |
| } |
| |
| static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr) |
| { |
| struct dtt200u_fe_state *state = fe->demodulator_priv; |
| u8 bw = GET_SNR,br; |
| dvb_usb_generic_rw(state->d,&bw,1,&br,1,0); |
| *snr = ~((br << 8) | br); |
| return 0; |
| } |
| |
| static int dtt200u_fe_init(struct dvb_frontend* fe) |
| { |
| struct dtt200u_fe_state *state = fe->demodulator_priv; |
| u8 b = SET_INIT; |
| return dvb_usb_generic_write(state->d,&b,1); |
| } |
| |
| 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 i; |
| fe_status_t st; |
| u16 freq = fep->frequency / 250000; |
| u8 bwbuf[2] = { SET_BANDWIDTH, 0 },freqbuf[3] = { SET_RF_FREQ, 0, 0 }; |
| |
| switch (fep->bandwidth_hz) { |
| case 8000000: |
| bwbuf[1] = 8; |
| break; |
| case 7000000: |
| bwbuf[1] = 7; |
| break; |
| case 6000000: |
| bwbuf[1] = 6; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| dvb_usb_generic_write(state->d,bwbuf,2); |
| |
| freqbuf[1] = freq & 0xff; |
| freqbuf[2] = (freq >> 8) & 0xff; |
| dvb_usb_generic_write(state->d,freqbuf,3); |
| |
| for (i = 0; i < 30; i++) { |
| msleep(20); |
| dtt200u_fe_read_status(fe, &st); |
| if (st & FE_TIMEDOUT) |
| continue; |
| } |
| |
| return 0; |
| } |
| |
| static int dtt200u_fe_get_frontend(struct dvb_frontend* fe) |
| { |
| struct dtv_frontend_properties *fep = &fe->dtv_property_cache; |
| 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 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; |
| |
| memcpy(&state->frontend.ops,&dtt200u_fe_ops,sizeof(struct dvb_frontend_ops)); |
| state->frontend.demodulator_priv = state; |
| |
| return &state->frontend; |
| error: |
| return NULL; |
| } |
| |
| static struct dvb_frontend_ops dtt200u_fe_ops = { |
| .delsys = { SYS_DVBT }, |
| .info = { |
| .name = "WideView USB DVB-T", |
| .type = FE_OFDM, |
| .frequency_min = 44250000, |
| .frequency_max = 867250000, |
| .frequency_stepsize = 250000, |
| .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, |
| }; |