drivers/media/dvb/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@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         fe_sec_voltage_t voltage;
  30         fe_sec_tone_mode_t 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, fe_status_t *status)
  76 {
  77         struct vp702x_fe_state *st = fe->demodulator_priv;
  78         vp702x_fe_refresh_state(st);
  79         deb_fe("%s\n",__func__);
  80
  81         if (st->lock == 0)
  82                 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
  83         else
  84                 *status = 0;
  85
  86         if (*status & FE_HAS_LOCK)
  87                 st->status_check_interval = 1000;
  88         else
  89                 st->status_check_interval = 250;
  90         return 0;
  91 }
  92
  93 /* not supported by this Frontend */
  94 static int vp702x_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
  95 {
  96         struct vp702x_fe_state *st = fe->demodulator_priv;
  97         vp702x_fe_refresh_state(st);
  98         *ber = 0;
  99         return 0;
 100 }
 101
 102 /* not supported by this Frontend */
 103 static int vp702x_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
 104 {
 105         struct vp702x_fe_state *st = fe->demodulator_priv;
 106         vp702x_fe_refresh_state(st);
 107         *unc = 0;
 108         return 0;
 109 }
 110
 111 static int vp702x_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
 112 {
 113         struct vp702x_fe_state *st = fe->demodulator_priv;
 114         vp702x_fe_refresh_state(st);
 115
 116         *strength = (st->sig << 8) | st->sig;
 117         return 0;
 118 }
 119
 120 static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
 121 {
 122         u8 _snr;
 123         struct vp702x_fe_state *st = fe->demodulator_priv;
 124         vp702x_fe_refresh_state(st);
 125
 126         _snr = (st->snr & 0x1f) * 0xff / 0x1f;
 127         *snr = (_snr << 8) | _snr;
 128         return 0;
 129 }
 130
 131 static int vp702x_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
 132 {
 133         deb_fe("%s\n",__func__);
 134         tune->min_delay_ms = 2000;
 135         return 0;
 136 }
 137
 138 static int vp702x_fe_set_frontend(struct dvb_frontend* fe,
 139                                   struct dvb_frontend_parameters *fep)
 140 {
 141         struct vp702x_fe_state *st = fe->demodulator_priv;
 142         struct vp702x_device_state *dst = st->d->priv;
 143         u32 freq = fep->frequency/1000;
 144         /*CalFrequency*/
 145 /*      u16 frequencyRef[16] = { 2, 4, 8, 16, 32, 64, 128, 256, 24, 5, 10, 20, 40, 80, 160, 320 }; */
 146         u64 sr;
 147         u8 *cmd;
 148
 149         mutex_lock(&dst->buf_mutex);
 150
 151         cmd = dst->buf;
 152         memset(cmd, 0, 10);
 153
 154         cmd[0] = (freq >> 8) & 0x7f;
 155         cmd[1] =  freq       & 0xff;
 156         cmd[2] = 1; /* divrate == 4 -> frequencyRef[1] -> 1 here */
 157
 158         sr = (u64) (fep->u.qpsk.symbol_rate/1000) << 20;
 159         do_div(sr,88000);
 160         cmd[3] = (sr >> 12) & 0xff;
 161         cmd[4] = (sr >> 4)  & 0xff;
 162         cmd[5] = (sr << 4)  & 0xf0;
 163
 164         deb_fe("setting frontend to: %u -> %u (%x) LNB-based GHz, symbolrate: %d -> %lu (%lx)\n",
 165                         fep->frequency,freq,freq, fep->u.qpsk.symbol_rate,
 166                         (unsigned long) sr, (unsigned long) sr);
 167
 168 /*      if (fep->inversion == INVERSION_ON)
 169                 cmd[6] |= 0x80; */
 170
 171         if (st->voltage == SEC_VOLTAGE_18)
 172                 cmd[6] |= 0x40;
 173
 174 /*      if (fep->u.qpsk.symbol_rate > 8000000)
 175                 cmd[6] |= 0x20;
 176
 177         if (fep->frequency < 1531000)
 178                 cmd[6] |= 0x04;
 179
 180         if (st->tone_mode == SEC_TONE_ON)
 181                 cmd[6] |= 0x01;*/
 182
 183         cmd[7] = vp702x_chksum(cmd,0,7);
 184
 185         st->status_check_interval = 250;
 186         st->next_status_check = jiffies;
 187
 188         vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100);
 189
 190         if (cmd[2] == 0 && cmd[3] == 0)
 191                 deb_fe("tuning failed.\n");
 192         else
 193                 deb_fe("tuning succeeded.\n");
 194
 195         mutex_unlock(&dst->buf_mutex);
 196
 197         return 0;
 198 }
 199
 200 static int vp702x_fe_init(struct dvb_frontend *fe)
 201 {
 202         struct vp702x_fe_state *st = fe->demodulator_priv;
 203         deb_fe("%s\n",__func__);
 204         vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0);
 205         return 0;
 206 }
 207
 208 static int vp702x_fe_sleep(struct dvb_frontend *fe)
 209 {
 210         deb_fe("%s\n",__func__);
 211         return 0;
 212 }
 213
 214 static int vp702x_fe_get_frontend(struct dvb_frontend* fe,
 215                                   struct dvb_frontend_parameters *fep)
 216 {
 217         deb_fe("%s\n",__func__);
 218         return 0;
 219 }
 220
 221 static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe,
 222                                     struct dvb_diseqc_master_cmd *m)
 223 {
 224         u8 *cmd;
 225         struct vp702x_fe_state *st = fe->demodulator_priv;
 226         struct vp702x_device_state *dst = st->d->priv;
 227
 228         deb_fe("%s\n",__func__);
 229
 230         if (m->msg_len > 4)
 231                 return -EINVAL;
 232
 233         mutex_lock(&dst->buf_mutex);
 234
 235         cmd = dst->buf;
 236         cmd[1] = SET_DISEQC_CMD;
 237         cmd[2] = m->msg_len;
 238         memcpy(&cmd[3], m->msg, m->msg_len);
 239         cmd[7] = vp702x_chksum(cmd, 0, 7);
 240
 241         vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100);
 242
 243         if (cmd[2] == 0 && cmd[3] == 0)
 244                 deb_fe("diseqc cmd failed.\n");
 245         else
 246                 deb_fe("diseqc cmd succeeded.\n");
 247
 248         mutex_unlock(&dst->buf_mutex);
 249
 250         return 0;
 251 }
 252
 253 static int vp702x_fe_send_diseqc_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
 254 {
 255         deb_fe("%s\n",__func__);
 256         return 0;
 257 }
 258
 259 static int vp702x_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 260 {
 261         struct vp702x_fe_state *st = fe->demodulator_priv;
 262         struct vp702x_device_state *dst = st->d->priv;
 263         u8 *buf;
 264
 265         deb_fe("%s\n",__func__);
 266
 267         st->tone_mode = tone;
 268
 269         if (tone == SEC_TONE_ON)
 270                 st->lnb_buf[2] = 0x02;
 271         else
 272                 st->lnb_buf[2] = 0x00;
 273
 274         st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);
 275
 276         mutex_lock(&dst->buf_mutex);
 277
 278         buf = dst->buf;
 279         memcpy(buf, st->lnb_buf, 8);
 280
 281         vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);
 282         if (buf[2] == 0 && buf[3] == 0)
 283                 deb_fe("set_tone cmd failed.\n");
 284         else
 285                 deb_fe("set_tone cmd succeeded.\n");
 286
 287         mutex_unlock(&dst->buf_mutex);
 288
 289         return 0;
 290 }
 291
 292 static int vp702x_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t
 293                 voltage)
 294 {
 295         struct vp702x_fe_state *st = fe->demodulator_priv;
 296         struct vp702x_device_state *dst = st->d->priv;
 297         u8 *buf;
 298         deb_fe("%s\n",__func__);
 299
 300         st->voltage = voltage;
 301
 302         if (voltage != SEC_VOLTAGE_OFF)
 303                 st->lnb_buf[4] = 0x01;
 304         else
 305                 st->lnb_buf[4] = 0x00;
 306
 307         st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);
 308
 309         mutex_lock(&dst->buf_mutex);
 310
 311         buf = dst->buf;
 312         memcpy(buf, st->lnb_buf, 8);
 313
 314         vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);
 315         if (buf[2] == 0 && buf[3] == 0)
 316                 deb_fe("set_voltage cmd failed.\n");
 317         else
 318                 deb_fe("set_voltage cmd succeeded.\n");
 319
 320         mutex_unlock(&dst->buf_mutex);
 321         return 0;
 322 }
 323
 324 static void vp702x_fe_release(struct dvb_frontend* fe)
 325 {
 326         struct vp702x_fe_state *st = fe->demodulator_priv;
 327         kfree(st);
 328 }
 329
 330 static struct dvb_frontend_ops vp702x_fe_ops;
 331
 332 struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d)
 333 {
 334         struct vp702x_fe_state *s = kzalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL);
 335         if (s == NULL)
 336                 goto error;
 337
 338         s->d = d;
 339
 340         memcpy(&s->fe.ops,&vp702x_fe_ops,sizeof(struct dvb_frontend_ops));
 341         s->fe.demodulator_priv = s;
 342
 343         s->lnb_buf[1] = SET_LNB_POWER;
 344         s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */
 345
 346         return &s->fe;
 347 error:
 348         return NULL;
 349 }
 350
 351
 352 static struct dvb_frontend_ops vp702x_fe_ops = {
 353         .info = {
 354                 .name           = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S",
 355                 .type           = FE_QPSK,
 356                 .frequency_min       = 950000,
 357                 .frequency_max       = 2150000,
 358                 .frequency_stepsize  = 1000,   /* kHz for QPSK frontends */
 359                 .frequency_tolerance = 0,
 360                 .symbol_rate_min     = 1000000,
 361                 .symbol_rate_max     = 45000000,
 362                 .symbol_rate_tolerance = 500,  /* ppm */
 363                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 364                 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
 365                 FE_CAN_QPSK |
 366                 FE_CAN_FEC_AUTO
 367         },
 368         .release = vp702x_fe_release,
 369
 370         .init  = vp702x_fe_init,
 371         .sleep = vp702x_fe_sleep,
 372
 373         .set_frontend = vp702x_fe_set_frontend,
 374         .get_frontend = vp702x_fe_get_frontend,
 375         .get_tune_settings = vp702x_fe_get_tune_settings,
 376
 377         .read_status = vp702x_fe_read_status,
 378         .read_ber = vp702x_fe_read_ber,
 379         .read_signal_strength = vp702x_fe_read_signal_strength,
 380         .read_snr = vp702x_fe_read_snr,
 381         .read_ucblocks = vp702x_fe_read_unc_blocks,
 382
 383         .diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg,
 384         .diseqc_send_burst = vp702x_fe_send_diseqc_burst,
 385         .set_tone = vp702x_fe_set_tone,
 386         .set_voltage = vp702x_fe_set_voltage,
 387 };