1 /* DVB frontend part of the Linux driver for the TwinhanDTV StarBox USB2.0 2 * DVB-S receiver. 3 * 4 * Copyright (C) 2005 Ralph Metzler <rjkm@metzlerbros.de> 5 * Metzler Brothers Systementwicklung GbR 6 * 7 * Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@desy.de> 8 * 9 * Thanks to Twinhan who kindly provided hardware and information. 10 * 11 * This file can be removed soon, after the DST-driver is rewritten to provice 12 * the frontend-controlling separately. 13 * 14 * This program is free software; you can redistribute it and/or modify it 15 * under the terms of the GNU General Public License as published by the Free 16 * Software Foundation, version 2. 17 * 18 * see Documentation/dvb/README.dvb-usb for more information 19 * 20 */ 21 #include "vp702x.h" 22 23 struct vp702x_fe_state { 24 struct dvb_frontend fe; 25 struct dvb_usb_device *d; 26 27 struct dvb_frontend_ops ops; 28 29 enum fe_sec_voltage voltage; 30 enum fe_sec_tone_mode tone_mode; 31 32 u8 lnb_buf[8]; 33 34 u8 lock; 35 u8 sig; 36 u8 snr; 37 38 unsigned long next_status_check; 39 unsigned long status_check_interval; 40 }; 41 42 static int vp702x_fe_refresh_state(struct vp702x_fe_state *st) 43 { 44 struct vp702x_device_state *dst = st->d->priv; 45 u8 *buf; 46 47 if (time_after(jiffies, st->next_status_check)) { 48 mutex_lock(&dst->buf_mutex); 49 buf = dst->buf; 50 51 vp702x_usb_in_op(st->d, READ_STATUS, 0, 0, buf, 10); 52 st->lock = buf[4]; 53 54 vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x11, 0, buf, 1); 55 st->snr = buf[0]; 56 57 vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x15, 0, buf, 1); 58 st->sig = buf[0]; 59 60 mutex_unlock(&dst->buf_mutex); 61 st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000; 62 } 63 return 0; 64 } 65 66 static u8 vp702x_chksum(u8 *buf,int f, int count) 67 { 68 u8 s = 0; 69 int i; 70 for (i = f; i < f+count; i++) 71 s += buf[i]; 72 return ~s+1; 73 } 74 75 static int vp702x_fe_read_status(struct dvb_frontend *fe, 76 enum fe_status *status) 77 { 78 struct vp702x_fe_state *st = fe->demodulator_priv; 79 vp702x_fe_refresh_state(st); 80 deb_fe("%s\n",__func__); 81 82 if (st->lock == 0) 83 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER; 84 else 85 *status = 0; 86 87 if (*status & FE_HAS_LOCK) 88 st->status_check_interval = 1000; 89 else 90 st->status_check_interval = 250; 91 return 0; 92 } 93 94 /* not supported by this Frontend */ 95 static int vp702x_fe_read_ber(struct dvb_frontend* fe, u32 *ber) 96 { 97 struct vp702x_fe_state *st = fe->demodulator_priv; 98 vp702x_fe_refresh_state(st); 99 *ber = 0; 100 return 0; 101 } 102 103 /* not supported by this Frontend */ 104 static int vp702x_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc) 105 { 106 struct vp702x_fe_state *st = fe->demodulator_priv; 107 vp702x_fe_refresh_state(st); 108 *unc = 0; 109 return 0; 110 } 111 112 static int vp702x_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength) 113 { 114 struct vp702x_fe_state *st = fe->demodulator_priv; 115 vp702x_fe_refresh_state(st); 116 117 *strength = (st->sig << 8) | st->sig; 118 return 0; 119 } 120 121 static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr) 122 { 123 u8 _snr; 124 struct vp702x_fe_state *st = fe->demodulator_priv; 125 vp702x_fe_refresh_state(st); 126 127 _snr = (st->snr & 0x1f) * 0xff / 0x1f; 128 *snr = (_snr << 8) | _snr; 129 return 0; 130 } 131 132 static int vp702x_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune) 133 { 134 deb_fe("%s\n",__func__); 135 tune->min_delay_ms = 2000; 136 return 0; 137 } 138 139 static int vp702x_fe_set_frontend(struct dvb_frontend *fe) 140 { 141 struct dtv_frontend_properties *fep = &fe->dtv_property_cache; 142 struct vp702x_fe_state *st = fe->demodulator_priv; 143 struct vp702x_device_state *dst = st->d->priv; 144 u32 freq = fep->frequency/1000; 145 /*CalFrequency*/ 146 /* u16 frequencyRef[16] = { 2, 4, 8, 16, 32, 64, 128, 256, 24, 5, 10, 20, 40, 80, 160, 320 }; */ 147 u64 sr; 148 u8 *cmd; 149 150 mutex_lock(&dst->buf_mutex); 151 152 cmd = dst->buf; 153 memset(cmd, 0, 10); 154 155 cmd[0] = (freq >> 8) & 0x7f; 156 cmd[1] = freq & 0xff; 157 cmd[2] = 1; /* divrate == 4 -> frequencyRef[1] -> 1 here */ 158 159 sr = (u64) (fep->symbol_rate/1000) << 20; 160 do_div(sr,88000); 161 cmd[3] = (sr >> 12) & 0xff; 162 cmd[4] = (sr >> 4) & 0xff; 163 cmd[5] = (sr << 4) & 0xf0; 164 165 deb_fe("setting frontend to: %u -> %u (%x) LNB-based GHz, symbolrate: %d -> %lu (%lx)\n", 166 fep->frequency, freq, freq, fep->symbol_rate, 167 (unsigned long) sr, (unsigned long) sr); 168 169 /* if (fep->inversion == INVERSION_ON) 170 cmd[6] |= 0x80; */ 171 172 if (st->voltage == SEC_VOLTAGE_18) 173 cmd[6] |= 0x40; 174 175 /* if (fep->symbol_rate > 8000000) 176 cmd[6] |= 0x20; 177 178 if (fep->frequency < 1531000) 179 cmd[6] |= 0x04; 180 181 if (st->tone_mode == SEC_TONE_ON) 182 cmd[6] |= 0x01;*/ 183 184 cmd[7] = vp702x_chksum(cmd,0,7); 185 186 st->status_check_interval = 250; 187 st->next_status_check = jiffies; 188 189 vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100); 190 191 if (cmd[2] == 0 && cmd[3] == 0) 192 deb_fe("tuning failed.\n"); 193 else 194 deb_fe("tuning succeeded.\n"); 195 196 mutex_unlock(&dst->buf_mutex); 197 198 return 0; 199 } 200 201 static int vp702x_fe_init(struct dvb_frontend *fe) 202 { 203 struct vp702x_fe_state *st = fe->demodulator_priv; 204 deb_fe("%s\n",__func__); 205 vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0); 206 return 0; 207 } 208 209 static int vp702x_fe_sleep(struct dvb_frontend *fe) 210 { 211 deb_fe("%s\n",__func__); 212 return 0; 213 } 214 215 static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe, 216 struct dvb_diseqc_master_cmd *m) 217 { 218 u8 *cmd; 219 struct vp702x_fe_state *st = fe->demodulator_priv; 220 struct vp702x_device_state *dst = st->d->priv; 221 222 deb_fe("%s\n",__func__); 223 224 if (m->msg_len > 4) 225 return -EINVAL; 226 227 mutex_lock(&dst->buf_mutex); 228 229 cmd = dst->buf; 230 cmd[1] = SET_DISEQC_CMD; 231 cmd[2] = m->msg_len; 232 memcpy(&cmd[3], m->msg, m->msg_len); 233 cmd[7] = vp702x_chksum(cmd, 0, 7); 234 235 vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100); 236 237 if (cmd[2] == 0 && cmd[3] == 0) 238 deb_fe("diseqc cmd failed.\n"); 239 else 240 deb_fe("diseqc cmd succeeded.\n"); 241 242 mutex_unlock(&dst->buf_mutex); 243 244 return 0; 245 } 246 247 static int vp702x_fe_send_diseqc_burst(struct dvb_frontend *fe, 248 enum fe_sec_mini_cmd burst) 249 { 250 deb_fe("%s\n",__func__); 251 return 0; 252 } 253 254 static int vp702x_fe_set_tone(struct dvb_frontend *fe, 255 enum fe_sec_tone_mode tone) 256 { 257 struct vp702x_fe_state *st = fe->demodulator_priv; 258 struct vp702x_device_state *dst = st->d->priv; 259 u8 *buf; 260 261 deb_fe("%s\n",__func__); 262 263 st->tone_mode = tone; 264 265 if (tone == SEC_TONE_ON) 266 st->lnb_buf[2] = 0x02; 267 else 268 st->lnb_buf[2] = 0x00; 269 270 st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7); 271 272 mutex_lock(&dst->buf_mutex); 273 274 buf = dst->buf; 275 memcpy(buf, st->lnb_buf, 8); 276 277 vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100); 278 if (buf[2] == 0 && buf[3] == 0) 279 deb_fe("set_tone cmd failed.\n"); 280 else 281 deb_fe("set_tone cmd succeeded.\n"); 282 283 mutex_unlock(&dst->buf_mutex); 284 285 return 0; 286 } 287 288 static int vp702x_fe_set_voltage(struct dvb_frontend *fe, 289 enum fe_sec_voltage voltage) 290 { 291 struct vp702x_fe_state *st = fe->demodulator_priv; 292 struct vp702x_device_state *dst = st->d->priv; 293 u8 *buf; 294 deb_fe("%s\n",__func__); 295 296 st->voltage = voltage; 297 298 if (voltage != SEC_VOLTAGE_OFF) 299 st->lnb_buf[4] = 0x01; 300 else 301 st->lnb_buf[4] = 0x00; 302 303 st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7); 304 305 mutex_lock(&dst->buf_mutex); 306 307 buf = dst->buf; 308 memcpy(buf, st->lnb_buf, 8); 309 310 vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100); 311 if (buf[2] == 0 && buf[3] == 0) 312 deb_fe("set_voltage cmd failed.\n"); 313 else 314 deb_fe("set_voltage cmd succeeded.\n"); 315 316 mutex_unlock(&dst->buf_mutex); 317 return 0; 318 } 319 320 static void vp702x_fe_release(struct dvb_frontend* fe) 321 { 322 struct vp702x_fe_state *st = fe->demodulator_priv; 323 kfree(st); 324 } 325 326 static struct dvb_frontend_ops vp702x_fe_ops; 327 328 struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d) 329 { 330 struct vp702x_fe_state *s = kzalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL); 331 if (s == NULL) 332 goto error; 333 334 s->d = d; 335 336 memcpy(&s->fe.ops,&vp702x_fe_ops,sizeof(struct dvb_frontend_ops)); 337 s->fe.demodulator_priv = s; 338 339 s->lnb_buf[1] = SET_LNB_POWER; 340 s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */ 341 342 return &s->fe; 343 error: 344 return NULL; 345 } 346 347 348 static struct dvb_frontend_ops vp702x_fe_ops = { 349 .delsys = { SYS_DVBS }, 350 .info = { 351 .name = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S", 352 .frequency_min = 950000, 353 .frequency_max = 2150000, 354 .frequency_stepsize = 1000, /* kHz for QPSK frontends */ 355 .frequency_tolerance = 0, 356 .symbol_rate_min = 1000000, 357 .symbol_rate_max = 45000000, 358 .symbol_rate_tolerance = 500, /* ppm */ 359 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | 360 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | 361 FE_CAN_QPSK | 362 FE_CAN_FEC_AUTO 363 }, 364 .release = vp702x_fe_release, 365 366 .init = vp702x_fe_init, 367 .sleep = vp702x_fe_sleep, 368 369 .set_frontend = vp702x_fe_set_frontend, 370 .get_tune_settings = vp702x_fe_get_tune_settings, 371 372 .read_status = vp702x_fe_read_status, 373 .read_ber = vp702x_fe_read_ber, 374 .read_signal_strength = vp702x_fe_read_signal_strength, 375 .read_snr = vp702x_fe_read_snr, 376 .read_ucblocks = vp702x_fe_read_unc_blocks, 377 378 .diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg, 379 .diseqc_send_burst = vp702x_fe_send_diseqc_burst, 380 .set_tone = vp702x_fe_set_tone, 381 .set_voltage = vp702x_fe_set_voltage, 382 }; 383