diff options
Diffstat (limited to 'drivers/media/usb/dvb-usb/vp7045-fe.c')
| -rw-r--r-- | drivers/media/usb/dvb-usb/vp7045-fe.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb/vp7045-fe.c b/drivers/media/usb/dvb-usb/vp7045-fe.c new file mode 100644 index 0000000000..e99740ec26 --- /dev/null +++ b/drivers/media/usb/dvb-usb/vp7045-fe.c @@ -0,0 +1,187 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* DVB frontend part of the Linux driver for TwinhanDTV Alpha/MagicBoxII USB2.0 + * DVB-T receiver. + * + * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@posteo.de) + * + * Thanks to Twinhan who kindly provided hardware and information. + * + * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information + */ +#include "vp7045.h" + +/* It is a Zarlink MT352 within a Samsung Tuner (DNOS404ZH102A) - 040929 - AAT + * + * Programming is hidden inside the firmware, so set_frontend is very easy. + * Even though there is a Firmware command that one can use to access the demod + * via its registers. This is used for status information. + */ + +struct vp7045_fe_state { + struct dvb_frontend fe; + struct dvb_usb_device *d; +}; + +static int vp7045_fe_read_status(struct dvb_frontend *fe, + enum fe_status *status) +{ + struct vp7045_fe_state *state = fe->demodulator_priv; + u8 s0 = vp7045_read_reg(state->d,0x00), + s1 = vp7045_read_reg(state->d,0x01), + s3 = vp7045_read_reg(state->d,0x03); + + *status = 0; + if (s0 & (1 << 4)) + *status |= FE_HAS_CARRIER; + if (s0 & (1 << 1)) + *status |= FE_HAS_VITERBI; + if (s0 & (1 << 5)) + *status |= FE_HAS_LOCK; + if (s1 & (1 << 1)) + *status |= FE_HAS_SYNC; + if (s3 & (1 << 6)) + *status |= FE_HAS_SIGNAL; + + if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) != + (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) + *status &= ~FE_HAS_LOCK; + + return 0; +} + +static int vp7045_fe_read_ber(struct dvb_frontend* fe, u32 *ber) +{ + struct vp7045_fe_state *state = fe->demodulator_priv; + *ber = (vp7045_read_reg(state->d, 0x0D) << 16) | + (vp7045_read_reg(state->d, 0x0E) << 8) | + vp7045_read_reg(state->d, 0x0F); + return 0; +} + +static int vp7045_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc) +{ + struct vp7045_fe_state *state = fe->demodulator_priv; + *unc = (vp7045_read_reg(state->d, 0x10) << 8) | + vp7045_read_reg(state->d, 0x11); + return 0; +} + +static int vp7045_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength) +{ + struct vp7045_fe_state *state = fe->demodulator_priv; + u16 signal = (vp7045_read_reg(state->d, 0x14) << 8) | + vp7045_read_reg(state->d, 0x15); + + *strength = ~signal; + return 0; +} + +static int vp7045_fe_read_snr(struct dvb_frontend* fe, u16 *snr) +{ + struct vp7045_fe_state *state = fe->demodulator_priv; + u8 _snr = vp7045_read_reg(state->d, 0x09); + *snr = (_snr << 8) | _snr; + return 0; +} + +static int vp7045_fe_init(struct dvb_frontend* fe) +{ + return 0; +} + +static int vp7045_fe_sleep(struct dvb_frontend* fe) +{ + return 0; +} + +static int vp7045_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune) +{ + tune->min_delay_ms = 800; + return 0; +} + +static int vp7045_fe_set_frontend(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *fep = &fe->dtv_property_cache; + struct vp7045_fe_state *state = fe->demodulator_priv; + u8 buf[5]; + u32 freq = fep->frequency / 1000; + + buf[0] = (freq >> 16) & 0xff; + buf[1] = (freq >> 8) & 0xff; + buf[2] = freq & 0xff; + buf[3] = 0; + + switch (fep->bandwidth_hz) { + case 8000000: + buf[4] = 8; + break; + case 7000000: + buf[4] = 7; + break; + case 6000000: + buf[4] = 6; + break; + default: + return -EINVAL; + } + + vp7045_usb_op(state->d,LOCK_TUNER_COMMAND,buf,5,NULL,0,200); + return 0; +} + +static void vp7045_fe_release(struct dvb_frontend* fe) +{ + struct vp7045_fe_state *state = fe->demodulator_priv; + kfree(state); +} + +static const struct dvb_frontend_ops vp7045_fe_ops; + +struct dvb_frontend * vp7045_fe_attach(struct dvb_usb_device *d) +{ + struct vp7045_fe_state *s = kzalloc(sizeof(struct vp7045_fe_state), GFP_KERNEL); + if (s == NULL) + goto error; + + s->d = d; + memcpy(&s->fe.ops, &vp7045_fe_ops, sizeof(struct dvb_frontend_ops)); + s->fe.demodulator_priv = s; + + return &s->fe; +error: + return NULL; +} + + +static const struct dvb_frontend_ops vp7045_fe_ops = { + .delsys = { SYS_DVBT }, + .info = { + .name = "Twinhan VP7045/46 USB DVB-T", + .frequency_min_hz = 44250 * kHz, + .frequency_max_hz = 867250 * kHz, + .frequency_stepsize_hz = 1 * kHz, + .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 = vp7045_fe_release, + + .init = vp7045_fe_init, + .sleep = vp7045_fe_sleep, + + .set_frontend = vp7045_fe_set_frontend, + .get_tune_settings = vp7045_fe_get_tune_settings, + + .read_status = vp7045_fe_read_status, + .read_ber = vp7045_fe_read_ber, + .read_signal_strength = vp7045_fe_read_signal_strength, + .read_snr = vp7045_fe_read_snr, + .read_ucblocks = vp7045_fe_read_unc_blocks, +}; |