diff options
Diffstat (limited to 'drivers/media/usb/dvb-usb/vp702x-fe.c')
| -rw-r--r-- | drivers/media/usb/dvb-usb/vp702x-fe.c | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb/vp702x-fe.c b/drivers/media/usb/dvb-usb/vp702x-fe.c new file mode 100644 index 000000000..c1e793190 --- /dev/null +++ b/drivers/media/usb/dvb-usb/vp702x-fe.c @@ -0,0 +1,377 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* DVB frontend part of the Linux driver for the TwinhanDTV StarBox USB2.0 + * DVB-S receiver. + * + * Copyright (C) 2005 Ralph Metzler <rjkm@metzlerbros.de> + * Metzler Brothers Systementwicklung GbR + * + * Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@posteo.de> + * + * Thanks to Twinhan who kindly provided hardware and information. + * + * This file can be removed soon, after the DST-driver is rewritten to provice + * the frontend-controlling separately. + * + * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information + */ +#include "vp702x.h" + +struct vp702x_fe_state { + struct dvb_frontend fe; + struct dvb_usb_device *d; + + struct dvb_frontend_ops ops; + + enum fe_sec_voltage voltage; + enum fe_sec_tone_mode tone_mode; + + u8 lnb_buf[8]; + + u8 lock; + u8 sig; + u8 snr; + + unsigned long next_status_check; + unsigned long status_check_interval; +}; + +static int vp702x_fe_refresh_state(struct vp702x_fe_state *st) +{ + struct vp702x_device_state *dst = st->d->priv; + u8 *buf; + + if (time_after(jiffies, st->next_status_check)) { + mutex_lock(&dst->buf_mutex); + buf = dst->buf; + + vp702x_usb_in_op(st->d, READ_STATUS, 0, 0, buf, 10); + st->lock = buf[4]; + + vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x11, 0, buf, 1); + st->snr = buf[0]; + + vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x15, 0, buf, 1); + st->sig = buf[0]; + + mutex_unlock(&dst->buf_mutex); + st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000; + } + return 0; +} + +static u8 vp702x_chksum(u8 *buf,int f, int count) +{ + u8 s = 0; + int i; + for (i = f; i < f+count; i++) + s += buf[i]; + return ~s+1; +} + +static int vp702x_fe_read_status(struct dvb_frontend *fe, + enum fe_status *status) +{ + struct vp702x_fe_state *st = fe->demodulator_priv; + vp702x_fe_refresh_state(st); + deb_fe("%s\n",__func__); + + if (st->lock == 0) + *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER; + else + *status = 0; + + if (*status & FE_HAS_LOCK) + st->status_check_interval = 1000; + else + st->status_check_interval = 250; + return 0; +} + +/* not supported by this Frontend */ +static int vp702x_fe_read_ber(struct dvb_frontend* fe, u32 *ber) +{ + struct vp702x_fe_state *st = fe->demodulator_priv; + vp702x_fe_refresh_state(st); + *ber = 0; + return 0; +} + +/* not supported by this Frontend */ +static int vp702x_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc) +{ + struct vp702x_fe_state *st = fe->demodulator_priv; + vp702x_fe_refresh_state(st); + *unc = 0; + return 0; +} + +static int vp702x_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength) +{ + struct vp702x_fe_state *st = fe->demodulator_priv; + vp702x_fe_refresh_state(st); + + *strength = (st->sig << 8) | st->sig; + return 0; +} + +static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr) +{ + u8 _snr; + struct vp702x_fe_state *st = fe->demodulator_priv; + vp702x_fe_refresh_state(st); + + _snr = (st->snr & 0x1f) * 0xff / 0x1f; + *snr = (_snr << 8) | _snr; + return 0; +} + +static int vp702x_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune) +{ + deb_fe("%s\n",__func__); + tune->min_delay_ms = 2000; + return 0; +} + +static int vp702x_fe_set_frontend(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *fep = &fe->dtv_property_cache; + struct vp702x_fe_state *st = fe->demodulator_priv; + struct vp702x_device_state *dst = st->d->priv; + u32 freq = fep->frequency/1000; + /*CalFrequency*/ +/* u16 frequencyRef[16] = { 2, 4, 8, 16, 32, 64, 128, 256, 24, 5, 10, 20, 40, 80, 160, 320 }; */ + u64 sr; + u8 *cmd; + + mutex_lock(&dst->buf_mutex); + + cmd = dst->buf; + memset(cmd, 0, 10); + + cmd[0] = (freq >> 8) & 0x7f; + cmd[1] = freq & 0xff; + cmd[2] = 1; /* divrate == 4 -> frequencyRef[1] -> 1 here */ + + sr = (u64) (fep->symbol_rate/1000) << 20; + do_div(sr,88000); + cmd[3] = (sr >> 12) & 0xff; + cmd[4] = (sr >> 4) & 0xff; + cmd[5] = (sr << 4) & 0xf0; + + deb_fe("setting frontend to: %u -> %u (%x) LNB-based GHz, symbolrate: %d -> %lu (%lx)\n", + fep->frequency, freq, freq, fep->symbol_rate, + (unsigned long) sr, (unsigned long) sr); + +/* if (fep->inversion == INVERSION_ON) + cmd[6] |= 0x80; */ + + if (st->voltage == SEC_VOLTAGE_18) + cmd[6] |= 0x40; + +/* if (fep->symbol_rate > 8000000) + cmd[6] |= 0x20; + + if (fep->frequency < 1531000) + cmd[6] |= 0x04; + + if (st->tone_mode == SEC_TONE_ON) + cmd[6] |= 0x01;*/ + + cmd[7] = vp702x_chksum(cmd,0,7); + + st->status_check_interval = 250; + st->next_status_check = jiffies; + + vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100); + + if (cmd[2] == 0 && cmd[3] == 0) + deb_fe("tuning failed.\n"); + else + deb_fe("tuning succeeded.\n"); + + mutex_unlock(&dst->buf_mutex); + + return 0; +} + +static int vp702x_fe_init(struct dvb_frontend *fe) +{ + struct vp702x_fe_state *st = fe->demodulator_priv; + deb_fe("%s\n",__func__); + vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0); + return 0; +} + +static int vp702x_fe_sleep(struct dvb_frontend *fe) +{ + deb_fe("%s\n",__func__); + return 0; +} + +static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe, + struct dvb_diseqc_master_cmd *m) +{ + u8 *cmd; + struct vp702x_fe_state *st = fe->demodulator_priv; + struct vp702x_device_state *dst = st->d->priv; + + deb_fe("%s\n",__func__); + + if (m->msg_len > 4) + return -EINVAL; + + mutex_lock(&dst->buf_mutex); + + cmd = dst->buf; + cmd[1] = SET_DISEQC_CMD; + cmd[2] = m->msg_len; + memcpy(&cmd[3], m->msg, m->msg_len); + cmd[7] = vp702x_chksum(cmd, 0, 7); + + vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100); + + if (cmd[2] == 0 && cmd[3] == 0) + deb_fe("diseqc cmd failed.\n"); + else + deb_fe("diseqc cmd succeeded.\n"); + + mutex_unlock(&dst->buf_mutex); + + return 0; +} + +static int vp702x_fe_send_diseqc_burst(struct dvb_frontend *fe, + enum fe_sec_mini_cmd burst) +{ + deb_fe("%s\n",__func__); + return 0; +} + +static int vp702x_fe_set_tone(struct dvb_frontend *fe, + enum fe_sec_tone_mode tone) +{ + struct vp702x_fe_state *st = fe->demodulator_priv; + struct vp702x_device_state *dst = st->d->priv; + u8 *buf; + + deb_fe("%s\n",__func__); + + st->tone_mode = tone; + + if (tone == SEC_TONE_ON) + st->lnb_buf[2] = 0x02; + else + st->lnb_buf[2] = 0x00; + + st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7); + + mutex_lock(&dst->buf_mutex); + + buf = dst->buf; + memcpy(buf, st->lnb_buf, 8); + + vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100); + if (buf[2] == 0 && buf[3] == 0) + deb_fe("set_tone cmd failed.\n"); + else + deb_fe("set_tone cmd succeeded.\n"); + + mutex_unlock(&dst->buf_mutex); + + return 0; +} + +static int vp702x_fe_set_voltage(struct dvb_frontend *fe, + enum fe_sec_voltage voltage) +{ + struct vp702x_fe_state *st = fe->demodulator_priv; + struct vp702x_device_state *dst = st->d->priv; + u8 *buf; + deb_fe("%s\n",__func__); + + st->voltage = voltage; + + if (voltage != SEC_VOLTAGE_OFF) + st->lnb_buf[4] = 0x01; + else + st->lnb_buf[4] = 0x00; + + st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7); + + mutex_lock(&dst->buf_mutex); + + buf = dst->buf; + memcpy(buf, st->lnb_buf, 8); + + vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100); + if (buf[2] == 0 && buf[3] == 0) + deb_fe("set_voltage cmd failed.\n"); + else + deb_fe("set_voltage cmd succeeded.\n"); + + mutex_unlock(&dst->buf_mutex); + return 0; +} + +static void vp702x_fe_release(struct dvb_frontend* fe) +{ + struct vp702x_fe_state *st = fe->demodulator_priv; + kfree(st); +} + +static const struct dvb_frontend_ops vp702x_fe_ops; + +struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d) +{ + struct vp702x_fe_state *s = kzalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL); + if (s == NULL) + goto error; + + s->d = d; + + memcpy(&s->fe.ops,&vp702x_fe_ops,sizeof(struct dvb_frontend_ops)); + s->fe.demodulator_priv = s; + + s->lnb_buf[1] = SET_LNB_POWER; + s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */ + + return &s->fe; +error: + return NULL; +} + + +static const struct dvb_frontend_ops vp702x_fe_ops = { + .delsys = { SYS_DVBS }, + .info = { + .name = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S", + .frequency_min_hz = 950 * MHz, + .frequency_max_hz = 2150 * MHz, + .frequency_stepsize_hz = 1 * MHz, + .symbol_rate_min = 1000000, + .symbol_rate_max = 45000000, + .symbol_rate_tolerance = 500, /* ppm */ + .caps = 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_QPSK | + FE_CAN_FEC_AUTO + }, + .release = vp702x_fe_release, + + .init = vp702x_fe_init, + .sleep = vp702x_fe_sleep, + + .set_frontend = vp702x_fe_set_frontend, + .get_tune_settings = vp702x_fe_get_tune_settings, + + .read_status = vp702x_fe_read_status, + .read_ber = vp702x_fe_read_ber, + .read_signal_strength = vp702x_fe_read_signal_strength, + .read_snr = vp702x_fe_read_snr, + .read_ucblocks = vp702x_fe_read_unc_blocks, + + .diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg, + .diseqc_send_burst = vp702x_fe_send_diseqc_burst, + .set_tone = vp702x_fe_set_tone, + .set_voltage = vp702x_fe_set_voltage, +}; 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