// SPDX-License-Identifier: GPL-2.0-only
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/* DVB frontend part of the Linux driver for the TwinhanDTV StarBox USB2.0
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* DVB-S receiver.
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*
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* Copyright (C) 2005 Ralph Metzler <rjkm@metzlerbros.de>
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* Metzler Brothers Systementwicklung GbR
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*
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* Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@posteo.de>
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*
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* Thanks to Twinhan who kindly provided hardware and information.
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*
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* This file can be removed soon, after the DST-driver is rewritten to provice
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* the frontend-controlling separately.
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*
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* see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
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*/
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#include "vp702x.h"
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struct vp702x_fe_state {
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struct dvb_frontend fe;
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struct dvb_usb_device *d;
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struct dvb_frontend_ops ops;
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enum fe_sec_voltage voltage;
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enum fe_sec_tone_mode tone_mode;
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u8 lnb_buf[8];
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u8 lock;
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u8 sig;
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u8 snr;
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unsigned long next_status_check;
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unsigned long status_check_interval;
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};
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static int vp702x_fe_refresh_state(struct vp702x_fe_state *st)
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{
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struct vp702x_device_state *dst = st->d->priv;
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u8 *buf;
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if (time_after(jiffies, st->next_status_check)) {
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mutex_lock(&dst->buf_mutex);
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buf = dst->buf;
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vp702x_usb_in_op(st->d, READ_STATUS, 0, 0, buf, 10);
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st->lock = buf[4];
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vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x11, 0, buf, 1);
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st->snr = buf[0];
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vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x15, 0, buf, 1);
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st->sig = buf[0];
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mutex_unlock(&dst->buf_mutex);
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st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
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}
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return 0;
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}
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static u8 vp702x_chksum(u8 *buf,int f, int count)
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{
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u8 s = 0;
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int i;
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for (i = f; i < f+count; i++)
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s += buf[i];
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return ~s+1;
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}
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static int vp702x_fe_read_status(struct dvb_frontend *fe,
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enum fe_status *status)
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{
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struct vp702x_fe_state *st = fe->demodulator_priv;
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vp702x_fe_refresh_state(st);
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deb_fe("%s\n",__func__);
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if (st->lock == 0)
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*status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
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else
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*status = 0;
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if (*status & FE_HAS_LOCK)
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st->status_check_interval = 1000;
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else
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st->status_check_interval = 250;
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return 0;
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}
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/* not supported by this Frontend */
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static int vp702x_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
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{
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struct vp702x_fe_state *st = fe->demodulator_priv;
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vp702x_fe_refresh_state(st);
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*ber = 0;
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return 0;
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}
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/* not supported by this Frontend */
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static int vp702x_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
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{
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struct vp702x_fe_state *st = fe->demodulator_priv;
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vp702x_fe_refresh_state(st);
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*unc = 0;
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return 0;
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}
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static int vp702x_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
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{
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struct vp702x_fe_state *st = fe->demodulator_priv;
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vp702x_fe_refresh_state(st);
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*strength = (st->sig << 8) | st->sig;
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return 0;
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}
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static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
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{
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u8 _snr;
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struct vp702x_fe_state *st = fe->demodulator_priv;
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vp702x_fe_refresh_state(st);
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_snr = (st->snr & 0x1f) * 0xff / 0x1f;
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*snr = (_snr << 8) | _snr;
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return 0;
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}
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static int vp702x_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
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{
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deb_fe("%s\n",__func__);
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tune->min_delay_ms = 2000;
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return 0;
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}
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static int vp702x_fe_set_frontend(struct dvb_frontend *fe)
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{
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struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
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struct vp702x_fe_state *st = fe->demodulator_priv;
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struct vp702x_device_state *dst = st->d->priv;
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u32 freq = fep->frequency/1000;
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/*CalFrequency*/
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/* u16 frequencyRef[16] = { 2, 4, 8, 16, 32, 64, 128, 256, 24, 5, 10, 20, 40, 80, 160, 320 }; */
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u64 sr;
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u8 *cmd;
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mutex_lock(&dst->buf_mutex);
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cmd = dst->buf;
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memset(cmd, 0, 10);
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cmd[0] = (freq >> 8) & 0x7f;
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cmd[1] = freq & 0xff;
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cmd[2] = 1; /* divrate == 4 -> frequencyRef[1] -> 1 here */
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sr = (u64) (fep->symbol_rate/1000) << 20;
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do_div(sr,88000);
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cmd[3] = (sr >> 12) & 0xff;
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cmd[4] = (sr >> 4) & 0xff;
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cmd[5] = (sr << 4) & 0xf0;
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deb_fe("setting frontend to: %u -> %u (%x) LNB-based GHz, symbolrate: %d -> %lu (%lx)\n",
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fep->frequency, freq, freq, fep->symbol_rate,
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(unsigned long) sr, (unsigned long) sr);
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/* if (fep->inversion == INVERSION_ON)
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cmd[6] |= 0x80; */
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if (st->voltage == SEC_VOLTAGE_18)
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cmd[6] |= 0x40;
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/* if (fep->symbol_rate > 8000000)
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cmd[6] |= 0x20;
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if (fep->frequency < 1531000)
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cmd[6] |= 0x04;
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if (st->tone_mode == SEC_TONE_ON)
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cmd[6] |= 0x01;*/
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cmd[7] = vp702x_chksum(cmd,0,7);
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st->status_check_interval = 250;
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st->next_status_check = jiffies;
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vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100);
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if (cmd[2] == 0 && cmd[3] == 0)
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deb_fe("tuning failed.\n");
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else
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deb_fe("tuning succeeded.\n");
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mutex_unlock(&dst->buf_mutex);
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return 0;
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}
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static int vp702x_fe_init(struct dvb_frontend *fe)
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{
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struct vp702x_fe_state *st = fe->demodulator_priv;
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deb_fe("%s\n",__func__);
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vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0);
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return 0;
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}
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static int vp702x_fe_sleep(struct dvb_frontend *fe)
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{
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deb_fe("%s\n",__func__);
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return 0;
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}
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static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe,
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struct dvb_diseqc_master_cmd *m)
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{
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u8 *cmd;
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struct vp702x_fe_state *st = fe->demodulator_priv;
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struct vp702x_device_state *dst = st->d->priv;
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deb_fe("%s\n",__func__);
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if (m->msg_len > 4)
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return -EINVAL;
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mutex_lock(&dst->buf_mutex);
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cmd = dst->buf;
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cmd[1] = SET_DISEQC_CMD;
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cmd[2] = m->msg_len;
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memcpy(&cmd[3], m->msg, m->msg_len);
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cmd[7] = vp702x_chksum(cmd, 0, 7);
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vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100);
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if (cmd[2] == 0 && cmd[3] == 0)
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deb_fe("diseqc cmd failed.\n");
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else
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deb_fe("diseqc cmd succeeded.\n");
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mutex_unlock(&dst->buf_mutex);
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return 0;
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}
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static int vp702x_fe_send_diseqc_burst(struct dvb_frontend *fe,
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enum fe_sec_mini_cmd burst)
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{
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deb_fe("%s\n",__func__);
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return 0;
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}
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static int vp702x_fe_set_tone(struct dvb_frontend *fe,
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enum fe_sec_tone_mode tone)
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{
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struct vp702x_fe_state *st = fe->demodulator_priv;
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struct vp702x_device_state *dst = st->d->priv;
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u8 *buf;
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deb_fe("%s\n",__func__);
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st->tone_mode = tone;
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if (tone == SEC_TONE_ON)
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st->lnb_buf[2] = 0x02;
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else
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st->lnb_buf[2] = 0x00;
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st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);
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mutex_lock(&dst->buf_mutex);
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buf = dst->buf;
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memcpy(buf, st->lnb_buf, 8);
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vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);
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if (buf[2] == 0 && buf[3] == 0)
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deb_fe("set_tone cmd failed.\n");
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else
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deb_fe("set_tone cmd succeeded.\n");
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mutex_unlock(&dst->buf_mutex);
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return 0;
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}
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static int vp702x_fe_set_voltage(struct dvb_frontend *fe,
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enum fe_sec_voltage voltage)
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{
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struct vp702x_fe_state *st = fe->demodulator_priv;
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struct vp702x_device_state *dst = st->d->priv;
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u8 *buf;
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deb_fe("%s\n",__func__);
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st->voltage = voltage;
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if (voltage != SEC_VOLTAGE_OFF)
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st->lnb_buf[4] = 0x01;
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else
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st->lnb_buf[4] = 0x00;
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st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);
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mutex_lock(&dst->buf_mutex);
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buf = dst->buf;
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memcpy(buf, st->lnb_buf, 8);
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vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);
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if (buf[2] == 0 && buf[3] == 0)
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deb_fe("set_voltage cmd failed.\n");
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else
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deb_fe("set_voltage cmd succeeded.\n");
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mutex_unlock(&dst->buf_mutex);
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return 0;
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}
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static void vp702x_fe_release(struct dvb_frontend* fe)
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{
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struct vp702x_fe_state *st = fe->demodulator_priv;
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kfree(st);
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}
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static const struct dvb_frontend_ops vp702x_fe_ops;
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struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d)
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{
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struct vp702x_fe_state *s = kzalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL);
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if (s == NULL)
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goto error;
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s->d = d;
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memcpy(&s->fe.ops,&vp702x_fe_ops,sizeof(struct dvb_frontend_ops));
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s->fe.demodulator_priv = s;
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s->lnb_buf[1] = SET_LNB_POWER;
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s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */
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return &s->fe;
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error:
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return NULL;
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}
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static const struct dvb_frontend_ops vp702x_fe_ops = {
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.delsys = { SYS_DVBS },
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.info = {
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.name = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S",
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.frequency_min_hz = 950 * MHz,
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.frequency_max_hz = 2150 * MHz,
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.frequency_stepsize_hz = 1 * MHz,
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.symbol_rate_min = 1000000,
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.symbol_rate_max = 45000000,
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.symbol_rate_tolerance = 500, /* ppm */
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.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
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FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
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FE_CAN_QPSK |
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FE_CAN_FEC_AUTO
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},
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.release = vp702x_fe_release,
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.init = vp702x_fe_init,
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.sleep = vp702x_fe_sleep,
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.set_frontend = vp702x_fe_set_frontend,
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.get_tune_settings = vp702x_fe_get_tune_settings,
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.read_status = vp702x_fe_read_status,
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.read_ber = vp702x_fe_read_ber,
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.read_signal_strength = vp702x_fe_read_signal_strength,
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.read_snr = vp702x_fe_read_snr,
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.read_ucblocks = vp702x_fe_read_unc_blocks,
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.diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg,
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.diseqc_send_burst = vp702x_fe_send_diseqc_burst,
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.set_tone = vp702x_fe_set_tone,
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.set_voltage = vp702x_fe_set_voltage,
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};
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