diff options
Diffstat (limited to 'drivers/media/dvb/dvb-usb/dtt200u-fe.c')
| -rw-r--r-- | drivers/media/dvb/dvb-usb/dtt200u-fe.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-usb/dtt200u-fe.c b/drivers/media/dvb/dvb-usb/dtt200u-fe.c new file mode 100644 index 0000000..b032523 --- /dev/null +++ b/drivers/media/dvb/dvb-usb/dtt200u-fe.c @@ -0,0 +1,208 @@ +/* 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 dvb_frontend_parameters 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 dvb_frontend_parameters *fep) +{ + 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->u.ofdm.bandwidth) { + case BANDWIDTH_8_MHZ: bwbuf[1] = 8; break; + case BANDWIDTH_7_MHZ: bwbuf[1] = 7; break; + case BANDWIDTH_6_MHZ: bwbuf[1] = 6; break; + case BANDWIDTH_AUTO: return -EOPNOTSUPP; + 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 dvb_frontend_parameters *fep) +{ + struct dtt200u_fe_state *state = fe->demodulator_priv; + memcpy(fep,&state->fep,sizeof(struct dvb_frontend_parameters)); + 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 = (struct dtt200u_fe_state*) kmalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL); + if (state == NULL) + goto error; + memset(state,0,sizeof(struct dtt200u_fe_state)); + + deb_info("attaching frontend dtt200u\n"); + + state->d = d; + + state->frontend.ops = &dtt200u_fe_ops; + state->frontend.demodulator_priv = state; + + goto success; +error: + return NULL; +success: + return &state->frontend; +} + +static struct dvb_frontend_ops dtt200u_fe_ops = { + .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, +}; 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