1 // SPDX-License-Identifier: GPL-2.0-only 2 /* DVB frontend part of the Linux driver for the TwinhanDTV StarBox USB2.0 3 * DVB-S receiver. 4 * 5 * Copyright (C) 2005 Ralph Metzler <rjkm@metzlerbros.de> 6 * Metzler Brothers Systementwicklung GbR 7 * 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 provice 13 * the frontend-controlling separately. 14 * 15 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information 16 */ 17 #include "vp702x.h" 18 19 struct 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 38 static 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 62 static 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 71 static 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 else 81 *status = 0; 82 83 if (*status & FE_HAS_LOCK) 84 st->status_check_interval = 1000; 85 else 86 st->status_check_interval = 250; 87 return 0; 88 } 89 90 /* not supported by this Frontend */ 91 static 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 */ 100 static 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 } 107 108 static 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 } 116 117 static 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 } 127 128 static 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 } 134 135 static 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 else 190 deb_fe("tuning succeeded.\n"); 191 192 mutex_unlock(&dst->buf_mutex); 193 194 return 0; 195 } 196 197 static 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 } 204 205 static int vp702x_fe_sleep(struct dvb_frontend *fe) 206 { 207 deb_fe("%s\n",__func__); 208 return 0; 209 } 210 211 static 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 else 236 deb_fe("diseqc cmd succeeded.\n"); 237 238 mutex_unlock(&dst->buf_mutex); 239 240 return 0; 241 } 242 243 static 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 } 249 250 static 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 else 264 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 else 277 deb_fe("set_tone cmd succeeded.\n"); 278 279 mutex_unlock(&dst->buf_mutex); 280 281 return 0; 282 } 283 284 static 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 else 297 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 else 310 deb_fe("set_voltage cmd succeeded.\n"); 311 312 mutex_unlock(&dst->buf_mutex); 313 return 0; 314 } 315 316 static void vp702x_fe_release(struct dvb_frontend* fe) 317 { 318 struct vp702x_fe_state *st = fe->demodulator_priv; 319 kfree(st); 320 } 321 322 static const struct dvb_frontend_ops vp702x_fe_ops; 323 324 struct 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; 339 error: 340 return NULL; 341 } 342 343 344 static 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_AUTO 358 }, 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