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1// SPDX-License-Identifier: GPL-2.0-only2/* DVB frontend part of the Linux driver for the TwinhanDTV StarBox USB2.03 * DVB-S receiver.4 *5 * Copyright (C) 2005 Ralph Metzler <rjkm@metzlerbros.de>6 * Metzler Brothers Systementwicklung GbR7 *8 * Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@posteo.de>9 *10 * Thanks to Twinhan who kindly provided hardware and information.11 *12 * This file can be removed soon, after the DST-driver is rewritten to provice13 * the frontend-controlling separately.14 *15 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information16 */17#include "vp702x.h"18 19struct vp702x_fe_state {20 struct dvb_frontend fe;21 struct dvb_usb_device *d;22 23 struct dvb_frontend_ops ops;24 25 enum fe_sec_voltage voltage;26 enum fe_sec_tone_mode tone_mode;27 28 u8 lnb_buf[8];29 30 u8 lock;31 u8 sig;32 u8 snr;33 34 unsigned long next_status_check;35 unsigned long status_check_interval;36};37 38static int vp702x_fe_refresh_state(struct vp702x_fe_state *st)39{40 struct vp702x_device_state *dst = st->d->priv;41 u8 *buf;42 43 if (time_after(jiffies, st->next_status_check)) {44 mutex_lock(&dst->buf_mutex);45 buf = dst->buf;46 47 vp702x_usb_in_op(st->d, READ_STATUS, 0, 0, buf, 10);48 st->lock = buf[4];49 50 vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x11, 0, buf, 1);51 st->snr = buf[0];52 53 vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x15, 0, buf, 1);54 st->sig = buf[0];55 56 mutex_unlock(&dst->buf_mutex);57 st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;58 }59 return 0;60}61 62static u8 vp702x_chksum(u8 *buf,int f, int count)63{64 u8 s = 0;65 int i;66 for (i = f; i < f+count; i++)67 s += buf[i];68 return ~s+1;69}70 71static int vp702x_fe_read_status(struct dvb_frontend *fe,72 enum fe_status *status)73{74 struct vp702x_fe_state *st = fe->demodulator_priv;75 vp702x_fe_refresh_state(st);76 deb_fe("%s\n",__func__);77 78 if (st->lock == 0)79 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;80 else81 *status = 0;82 83 if (*status & FE_HAS_LOCK)84 st->status_check_interval = 1000;85 else86 st->status_check_interval = 250;87 return 0;88}89 90/* not supported by this Frontend */91static int vp702x_fe_read_ber(struct dvb_frontend* fe, u32 *ber)92{93 struct vp702x_fe_state *st = fe->demodulator_priv;94 vp702x_fe_refresh_state(st);95 *ber = 0;96 return 0;97}98 99/* not supported by this Frontend */100static int vp702x_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)101{102 struct vp702x_fe_state *st = fe->demodulator_priv;103 vp702x_fe_refresh_state(st);104 *unc = 0;105 return 0;106}107 108static int vp702x_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)109{110 struct vp702x_fe_state *st = fe->demodulator_priv;111 vp702x_fe_refresh_state(st);112 113 *strength = (st->sig << 8) | st->sig;114 return 0;115}116 117static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr)118{119 u8 _snr;120 struct vp702x_fe_state *st = fe->demodulator_priv;121 vp702x_fe_refresh_state(st);122 123 _snr = (st->snr & 0x1f) * 0xff / 0x1f;124 *snr = (_snr << 8) | _snr;125 return 0;126}127 128static int vp702x_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)129{130 deb_fe("%s\n",__func__);131 tune->min_delay_ms = 2000;132 return 0;133}134 135static int vp702x_fe_set_frontend(struct dvb_frontend *fe)136{137 struct dtv_frontend_properties *fep = &fe->dtv_property_cache;138 struct vp702x_fe_state *st = fe->demodulator_priv;139 struct vp702x_device_state *dst = st->d->priv;140 u32 freq = fep->frequency/1000;141 /*CalFrequency*/142/* u16 frequencyRef[16] = { 2, 4, 8, 16, 32, 64, 128, 256, 24, 5, 10, 20, 40, 80, 160, 320 }; */143 u64 sr;144 u8 *cmd;145 146 mutex_lock(&dst->buf_mutex);147 148 cmd = dst->buf;149 memset(cmd, 0, 10);150 151 cmd[0] = (freq >> 8) & 0x7f;152 cmd[1] = freq & 0xff;153 cmd[2] = 1; /* divrate == 4 -> frequencyRef[1] -> 1 here */154 155 sr = (u64) (fep->symbol_rate/1000) << 20;156 do_div(sr,88000);157 cmd[3] = (sr >> 12) & 0xff;158 cmd[4] = (sr >> 4) & 0xff;159 cmd[5] = (sr << 4) & 0xf0;160 161 deb_fe("setting frontend to: %u -> %u (%x) LNB-based GHz, symbolrate: %d -> %lu (%lx)\n",162 fep->frequency, freq, freq, fep->symbol_rate,163 (unsigned long) sr, (unsigned long) sr);164 165/* if (fep->inversion == INVERSION_ON)166 cmd[6] |= 0x80; */167 168 if (st->voltage == SEC_VOLTAGE_18)169 cmd[6] |= 0x40;170 171/* if (fep->symbol_rate > 8000000)172 cmd[6] |= 0x20;173 174 if (fep->frequency < 1531000)175 cmd[6] |= 0x04;176 177 if (st->tone_mode == SEC_TONE_ON)178 cmd[6] |= 0x01;*/179 180 cmd[7] = vp702x_chksum(cmd,0,7);181 182 st->status_check_interval = 250;183 st->next_status_check = jiffies;184 185 vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100);186 187 if (cmd[2] == 0 && cmd[3] == 0)188 deb_fe("tuning failed.\n");189 else190 deb_fe("tuning succeeded.\n");191 192 mutex_unlock(&dst->buf_mutex);193 194 return 0;195}196 197static int vp702x_fe_init(struct dvb_frontend *fe)198{199 struct vp702x_fe_state *st = fe->demodulator_priv;200 deb_fe("%s\n",__func__);201 vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0);202 return 0;203}204 205static int vp702x_fe_sleep(struct dvb_frontend *fe)206{207 deb_fe("%s\n",__func__);208 return 0;209}210 211static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe,212 struct dvb_diseqc_master_cmd *m)213{214 u8 *cmd;215 struct vp702x_fe_state *st = fe->demodulator_priv;216 struct vp702x_device_state *dst = st->d->priv;217 218 deb_fe("%s\n",__func__);219 220 if (m->msg_len > 4)221 return -EINVAL;222 223 mutex_lock(&dst->buf_mutex);224 225 cmd = dst->buf;226 cmd[1] = SET_DISEQC_CMD;227 cmd[2] = m->msg_len;228 memcpy(&cmd[3], m->msg, m->msg_len);229 cmd[7] = vp702x_chksum(cmd, 0, 7);230 231 vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100);232 233 if (cmd[2] == 0 && cmd[3] == 0)234 deb_fe("diseqc cmd failed.\n");235 else236 deb_fe("diseqc cmd succeeded.\n");237 238 mutex_unlock(&dst->buf_mutex);239 240 return 0;241}242 243static int vp702x_fe_send_diseqc_burst(struct dvb_frontend *fe,244 enum fe_sec_mini_cmd burst)245{246 deb_fe("%s\n",__func__);247 return 0;248}249 250static int vp702x_fe_set_tone(struct dvb_frontend *fe,251 enum fe_sec_tone_mode tone)252{253 struct vp702x_fe_state *st = fe->demodulator_priv;254 struct vp702x_device_state *dst = st->d->priv;255 u8 *buf;256 257 deb_fe("%s\n",__func__);258 259 st->tone_mode = tone;260 261 if (tone == SEC_TONE_ON)262 st->lnb_buf[2] = 0x02;263 else264 st->lnb_buf[2] = 0x00;265 266 st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);267 268 mutex_lock(&dst->buf_mutex);269 270 buf = dst->buf;271 memcpy(buf, st->lnb_buf, 8);272 273 vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);274 if (buf[2] == 0 && buf[3] == 0)275 deb_fe("set_tone cmd failed.\n");276 else277 deb_fe("set_tone cmd succeeded.\n");278 279 mutex_unlock(&dst->buf_mutex);280 281 return 0;282}283 284static int vp702x_fe_set_voltage(struct dvb_frontend *fe,285 enum fe_sec_voltage voltage)286{287 struct vp702x_fe_state *st = fe->demodulator_priv;288 struct vp702x_device_state *dst = st->d->priv;289 u8 *buf;290 deb_fe("%s\n",__func__);291 292 st->voltage = voltage;293 294 if (voltage != SEC_VOLTAGE_OFF)295 st->lnb_buf[4] = 0x01;296 else297 st->lnb_buf[4] = 0x00;298 299 st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);300 301 mutex_lock(&dst->buf_mutex);302 303 buf = dst->buf;304 memcpy(buf, st->lnb_buf, 8);305 306 vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);307 if (buf[2] == 0 && buf[3] == 0)308 deb_fe("set_voltage cmd failed.\n");309 else310 deb_fe("set_voltage cmd succeeded.\n");311 312 mutex_unlock(&dst->buf_mutex);313 return 0;314}315 316static void vp702x_fe_release(struct dvb_frontend* fe)317{318 struct vp702x_fe_state *st = fe->demodulator_priv;319 kfree(st);320}321 322static const struct dvb_frontend_ops vp702x_fe_ops;323 324struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d)325{326 struct vp702x_fe_state *s = kzalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL);327 if (s == NULL)328 goto error;329 330 s->d = d;331 332 memcpy(&s->fe.ops,&vp702x_fe_ops,sizeof(struct dvb_frontend_ops));333 s->fe.demodulator_priv = s;334 335 s->lnb_buf[1] = SET_LNB_POWER;336 s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */337 338 return &s->fe;339error:340 return NULL;341}342 343 344static const struct dvb_frontend_ops vp702x_fe_ops = {345 .delsys = { SYS_DVBS },346 .info = {347 .name = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S",348 .frequency_min_hz = 950 * MHz,349 .frequency_max_hz = 2150 * MHz,350 .frequency_stepsize_hz = 1 * MHz,351 .symbol_rate_min = 1000000,352 .symbol_rate_max = 45000000,353 .symbol_rate_tolerance = 500, /* ppm */354 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |355 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |356 FE_CAN_QPSK |357 FE_CAN_FEC_AUTO358 },359 .release = vp702x_fe_release,360 361 .init = vp702x_fe_init,362 .sleep = vp702x_fe_sleep,363 364 .set_frontend = vp702x_fe_set_frontend,365 .get_tune_settings = vp702x_fe_get_tune_settings,366 367 .read_status = vp702x_fe_read_status,368 .read_ber = vp702x_fe_read_ber,369 .read_signal_strength = vp702x_fe_read_signal_strength,370 .read_snr = vp702x_fe_read_snr,371 .read_ucblocks = vp702x_fe_read_unc_blocks,372 373 .diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg,374 .diseqc_send_burst = vp702x_fe_send_diseqc_burst,375 .set_tone = vp702x_fe_set_tone,376 .set_voltage = vp702x_fe_set_voltage,377};378