drivers/media/usb/dvb-usb/vp702x-fe.c

   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@posteo.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/media/dvb-drivers/dvb-usb.rst 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 const 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 const 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_hz       =  950 * MHz,
 353                 .frequency_max_hz       = 2150 * MHz,
 354                 .frequency_stepsize_hz  =    1 * MHz,
 355                 .symbol_rate_min     = 1000000,
 356                 .symbol_rate_max     = 45000000,
 357                 .symbol_rate_tolerance = 500,  /* ppm */
 358                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 359                 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
 360                 FE_CAN_QPSK |
 361                 FE_CAN_FEC_AUTO
 362         },
 363         .release = vp702x_fe_release,
 364
 365         .init  = vp702x_fe_init,
 366         .sleep = vp702x_fe_sleep,
 367
 368         .set_frontend = vp702x_fe_set_frontend,
 369         .get_tune_settings = vp702x_fe_get_tune_settings,
 370
 371         .read_status = vp702x_fe_read_status,
 372         .read_ber = vp702x_fe_read_ber,
 373         .read_signal_strength = vp702x_fe_read_signal_strength,
 374         .read_snr = vp702x_fe_read_snr,
 375         .read_ucblocks = vp702x_fe_read_unc_blocks,
 376
 377         .diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg,
 378         .diseqc_send_burst = vp702x_fe_send_diseqc_burst,
 379         .set_tone = vp702x_fe_set_tone,
 380         .set_voltage = vp702x_fe_set_voltage,
 381 };