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@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 {
 140         struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
 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->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->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->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_send_diseqc_msg (struct dvb_frontend* fe,
 215                                     struct dvb_diseqc_master_cmd *m)
 216 {
 217         u8 *cmd;
 218         struct vp702x_fe_state *st = fe->demodulator_priv;
 219         struct vp702x_device_state *dst = st->d->priv;
 220
 221         deb_fe("%s\n",__func__);
 222
 223         if (m->msg_len > 4)
 224                 return -EINVAL;
 225
 226         mutex_lock(&dst->buf_mutex);
 227
 228         cmd = dst->buf;
 229         cmd[1] = SET_DISEQC_CMD;
 230         cmd[2] = m->msg_len;
 231         memcpy(&cmd[3], m->msg, m->msg_len);
 232         cmd[7] = vp702x_chksum(cmd, 0, 7);
 233
 234         vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100);
 235
 236         if (cmd[2] == 0 && cmd[3] == 0)
 237                 deb_fe("diseqc cmd failed.\n");
 238         else
 239                 deb_fe("diseqc cmd succeeded.\n");
 240
 241         mutex_unlock(&dst->buf_mutex);
 242
 243         return 0;
 244 }
 245
 246 static int vp702x_fe_send_diseqc_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
 247 {
 248         deb_fe("%s\n",__func__);
 249         return 0;
 250 }
 251
 252 static int vp702x_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 253 {
 254         struct vp702x_fe_state *st = fe->demodulator_priv;
 255         struct vp702x_device_state *dst = st->d->priv;
 256         u8 *buf;
 257
 258         deb_fe("%s\n",__func__);
 259
 260         st->tone_mode = tone;
 261
 262         if (tone == SEC_TONE_ON)
 263                 st->lnb_buf[2] = 0x02;
 264         else
 265                 st->lnb_buf[2] = 0x00;
 266
 267         st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);
 268
 269         mutex_lock(&dst->buf_mutex);
 270
 271         buf = dst->buf;
 272         memcpy(buf, st->lnb_buf, 8);
 273
 274         vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);
 275         if (buf[2] == 0 && buf[3] == 0)
 276                 deb_fe("set_tone cmd failed.\n");
 277         else
 278                 deb_fe("set_tone cmd succeeded.\n");
 279
 280         mutex_unlock(&dst->buf_mutex);
 281
 282         return 0;
 283 }
 284
 285 static int vp702x_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t
 286                 voltage)
 287 {
 288         struct vp702x_fe_state *st = fe->demodulator_priv;
 289         struct vp702x_device_state *dst = st->d->priv;
 290         u8 *buf;
 291         deb_fe("%s\n",__func__);
 292
 293         st->voltage = voltage;
 294
 295         if (voltage != SEC_VOLTAGE_OFF)
 296                 st->lnb_buf[4] = 0x01;
 297         else
 298                 st->lnb_buf[4] = 0x00;
 299
 300         st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);
 301
 302         mutex_lock(&dst->buf_mutex);
 303
 304         buf = dst->buf;
 305         memcpy(buf, st->lnb_buf, 8);
 306
 307         vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);
 308         if (buf[2] == 0 && buf[3] == 0)
 309                 deb_fe("set_voltage cmd failed.\n");
 310         else
 311                 deb_fe("set_voltage cmd succeeded.\n");
 312
 313         mutex_unlock(&dst->buf_mutex);
 314         return 0;
 315 }
 316
 317 static void vp702x_fe_release(struct dvb_frontend* fe)
 318 {
 319         struct vp702x_fe_state *st = fe->demodulator_priv;
 320         kfree(st);
 321 }
 322
 323 static struct dvb_frontend_ops vp702x_fe_ops;
 324
 325 struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d)
 326 {
 327         struct vp702x_fe_state *s = kzalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL);
 328         if (s == NULL)
 329                 goto error;
 330
 331         s->d = d;
 332
 333         memcpy(&s->fe.ops,&vp702x_fe_ops,sizeof(struct dvb_frontend_ops));
 334         s->fe.demodulator_priv = s;
 335
 336         s->lnb_buf[1] = SET_LNB_POWER;
 337         s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */
 338
 339         return &s->fe;
 340 error:
 341         return NULL;
 342 }
 343
 344
 345 static struct dvb_frontend_ops vp702x_fe_ops = {
 346         .delsys = { SYS_DVBS },
 347         .info = {
 348                 .name           = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S",
 349                 .frequency_min       = 950000,
 350                 .frequency_max       = 2150000,
 351                 .frequency_stepsize  = 1000,   /* kHz for QPSK frontends */
 352                 .frequency_tolerance = 0,
 353                 .symbol_rate_min     = 1000000,
 354                 .symbol_rate_max     = 45000000,
 355                 .symbol_rate_tolerance = 500,  /* ppm */
 356                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 357                 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
 358                 FE_CAN_QPSK |
 359                 FE_CAN_FEC_AUTO
 360         },
 361         .release = vp702x_fe_release,
 362
 363         .init  = vp702x_fe_init,
 364         .sleep = vp702x_fe_sleep,
 365
 366         .set_frontend = vp702x_fe_set_frontend,
 367         .get_tune_settings = vp702x_fe_get_tune_settings,
 368
 369         .read_status = vp702x_fe_read_status,
 370         .read_ber = vp702x_fe_read_ber,
 371         .read_signal_strength = vp702x_fe_read_signal_strength,
 372         .read_snr = vp702x_fe_read_snr,
 373         .read_ucblocks = vp702x_fe_read_unc_blocks,
 374
 375         .diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg,
 376         .diseqc_send_burst = vp702x_fe_send_diseqc_burst,
 377         .set_tone = vp702x_fe_set_tone,
 378         .set_voltage = vp702x_fe_set_voltage,
 379 };