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         u8 buf[10];
  45         if (time_after(jiffies,st->next_status_check)) {
  46                 vp702x_usb_in_op(st->d,READ_STATUS,0,0,buf,10);
  47
  48                 st->lock = buf[4];
  49                 vp702x_usb_in_op(st->d,READ_TUNER_REG_REQ,0x11,0,&st->snr,1);
  50                 vp702x_usb_in_op(st->d,READ_TUNER_REG_REQ,0x15,0,&st->sig,1);
  51
  52                 st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
  53         }
  54         return 0;
  55 }
  56
  57 static u8 vp702x_chksum(u8 *buf,int f, int count)
  58 {
  59         u8 s = 0;
  60         int i;
  61         for (i = f; i < f+count; i++)
  62                 s += buf[i];
  63         return ~s+1;
  64 }
  65
  66 static int vp702x_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
  67 {
  68         struct vp702x_fe_state *st = fe->demodulator_priv;
  69         vp702x_fe_refresh_state(st);
  70         deb_fe("%s\n",__FUNCTION__);
  71
  72         if (st->lock == 0)
  73                 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
  74         else
  75                 *status = 0;
  76
  77         if (*status & FE_HAS_LOCK)
  78                 st->status_check_interval = 1000;
  79         else
  80                 st->status_check_interval = 250;
  81         return 0;
  82 }
  83
  84 /* not supported by this Frontend */
  85 static int vp702x_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
  86 {
  87         struct vp702x_fe_state *st = fe->demodulator_priv;
  88         vp702x_fe_refresh_state(st);
  89         *ber = 0;
  90         return 0;
  91 }
  92
  93 /* not supported by this Frontend */
  94 static int vp702x_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
  95 {
  96         struct vp702x_fe_state *st = fe->demodulator_priv;
  97         vp702x_fe_refresh_state(st);
  98         *unc = 0;
  99         return 0;
 100 }
 101
 102 static int vp702x_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
 103 {
 104         struct vp702x_fe_state *st = fe->demodulator_priv;
 105         vp702x_fe_refresh_state(st);
 106
 107         *strength = (st->sig << 8) | st->sig;
 108         return 0;
 109 }
 110
 111 static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
 112 {
 113         u8 _snr;
 114         struct vp702x_fe_state *st = fe->demodulator_priv;
 115         vp702x_fe_refresh_state(st);
 116
 117         _snr = (st->snr & 0x1f) * 0xff / 0x1f;
 118         *snr = (_snr << 8) | _snr;
 119         return 0;
 120 }
 121
 122 static int vp702x_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
 123 {
 124         deb_fe("%s\n",__FUNCTION__);
 125         tune->min_delay_ms = 2000;
 126         return 0;
 127 }
 128
 129 static int vp702x_fe_set_frontend(struct dvb_frontend* fe,
 130                                   struct dvb_frontend_parameters *fep)
 131 {
 132         struct vp702x_fe_state *st = fe->demodulator_priv;
 133         u32 freq = fep->frequency/1000;
 134         /*CalFrequency*/
 135 /*      u16 frequencyRef[16] = { 2, 4, 8, 16, 32, 64, 128, 256, 24, 5, 10, 20, 40, 80, 160, 320 }; */
 136         u64 sr;
 137         u8 cmd[8] = { 0 },ibuf[10];
 138
 139         cmd[0] = (freq >> 8) & 0x7f;
 140         cmd[1] =  freq       & 0xff;
 141         cmd[2] = 1; /* divrate == 4 -> frequencyRef[1] -> 1 here */
 142
 143         sr = (u64) (fep->u.qpsk.symbol_rate/1000) << 20;
 144         do_div(sr,88000);
 145         cmd[3] = (sr >> 12) & 0xff;
 146         cmd[4] = (sr >> 4)  & 0xff;
 147         cmd[5] = (sr << 4)  & 0xf0;
 148
 149         deb_fe("setting frontend to: %u -> %u (%x) LNB-based GHz, symbolrate: %d -> %lu (%lx)\n",
 150                         fep->frequency,freq,freq, fep->u.qpsk.symbol_rate,
 151                         (unsigned long) sr, (unsigned long) sr);
 152
 153 /*      if (fep->inversion == INVERSION_ON)
 154                 cmd[6] |= 0x80; */
 155
 156         if (st->voltage == SEC_VOLTAGE_18)
 157                 cmd[6] |= 0x40;
 158
 159 /*      if (fep->u.qpsk.symbol_rate > 8000000)
 160                 cmd[6] |= 0x20;
 161
 162         if (fep->frequency < 1531000)
 163                 cmd[6] |= 0x04;
 164
 165         if (st->tone_mode == SEC_TONE_ON)
 166                 cmd[6] |= 0x01;*/
 167
 168         cmd[7] = vp702x_chksum(cmd,0,7);
 169
 170         st->status_check_interval = 250;
 171         st->next_status_check = jiffies;
 172
 173         vp702x_usb_inout_op(st->d,cmd,8,ibuf,10,100);
 174
 175         if (ibuf[2] == 0 && ibuf[3] == 0)
 176                 deb_fe("tuning failed.\n");
 177         else
 178                 deb_fe("tuning succeeded.\n");
 179
 180         return 0;
 181 }
 182
 183 static int vp702x_fe_init(struct dvb_frontend *fe)
 184 {
 185         struct vp702x_fe_state *st = fe->demodulator_priv;
 186         deb_fe("%s\n",__FUNCTION__);
 187         vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0);
 188         return 0;
 189 }
 190
 191 static int vp702x_fe_sleep(struct dvb_frontend *fe)
 192 {
 193         deb_fe("%s\n",__FUNCTION__);
 194         return 0;
 195 }
 196
 197 static int vp702x_fe_get_frontend(struct dvb_frontend* fe,
 198                                   struct dvb_frontend_parameters *fep)
 199 {
 200         deb_fe("%s\n",__FUNCTION__);
 201         return 0;
 202 }
 203
 204 static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe,
 205                                     struct dvb_diseqc_master_cmd *m)
 206 {
 207         struct vp702x_fe_state *st = fe->demodulator_priv;
 208         u8 cmd[8],ibuf[10];
 209         memset(cmd,0,8);
 210
 211         deb_fe("%s\n",__FUNCTION__);
 212
 213         if (m->msg_len > 4)
 214                 return -EINVAL;
 215
 216         cmd[1] = SET_DISEQC_CMD;
 217         cmd[2] = m->msg_len;
 218         memcpy(&cmd[3], m->msg, m->msg_len);
 219         cmd[7] = vp702x_chksum(cmd,0,7);
 220
 221         vp702x_usb_inout_op(st->d,cmd,8,ibuf,10,100);
 222
 223         if (ibuf[2] == 0 && ibuf[3] == 0)
 224                 deb_fe("diseqc cmd failed.\n");
 225         else
 226                 deb_fe("diseqc cmd succeeded.\n");
 227
 228         return 0;
 229 }
 230
 231 static int vp702x_fe_send_diseqc_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
 232 {
 233         deb_fe("%s\n",__FUNCTION__);
 234         return 0;
 235 }
 236
 237 static int vp702x_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 238 {
 239         struct vp702x_fe_state *st = fe->demodulator_priv;
 240         u8 ibuf[10];
 241         deb_fe("%s\n",__FUNCTION__);
 242
 243         st->tone_mode = tone;
 244
 245         if (tone == SEC_TONE_ON)
 246                 st->lnb_buf[2] = 0x02;
 247         else
 248                 st->lnb_buf[2] = 0x00;
 249
 250         st->lnb_buf[7] = vp702x_chksum(st->lnb_buf,0,7);
 251
 252         vp702x_usb_inout_op(st->d,st->lnb_buf,8,ibuf,10,100);
 253         if (ibuf[2] == 0 && ibuf[3] == 0)
 254                 deb_fe("set_tone cmd failed.\n");
 255         else
 256                 deb_fe("set_tone cmd succeeded.\n");
 257
 258         return 0;
 259 }
 260
 261 static int vp702x_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t
 262                 voltage)
 263 {
 264         struct vp702x_fe_state *st = fe->demodulator_priv;
 265         u8 ibuf[10];
 266         deb_fe("%s\n",__FUNCTION__);
 267
 268         st->voltage = voltage;
 269
 270         if (voltage != SEC_VOLTAGE_OFF)
 271                 st->lnb_buf[4] = 0x01;
 272         else
 273                 st->lnb_buf[4] = 0x00;
 274
 275         st->lnb_buf[7] = vp702x_chksum(st->lnb_buf,0,7);
 276
 277         vp702x_usb_inout_op(st->d,st->lnb_buf,8,ibuf,10,100);
 278         if (ibuf[2] == 0 && ibuf[3] == 0)
 279                 deb_fe("set_voltage cmd failed.\n");
 280         else
 281                 deb_fe("set_voltage cmd succeeded.\n");
 282
 283         return 0;
 284 }
 285
 286 static void vp702x_fe_release(struct dvb_frontend* fe)
 287 {
 288         struct vp702x_fe_state *st = fe->demodulator_priv;
 289         kfree(st);
 290 }
 291
 292 static struct dvb_frontend_ops vp702x_fe_ops;
 293
 294 struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d)
 295 {
 296         struct vp702x_fe_state *s = kzalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL);
 297         if (s == NULL)
 298                 goto error;
 299
 300         s->d = d;
 301
 302         memcpy(&s->fe.ops,&vp702x_fe_ops,sizeof(struct dvb_frontend_ops));
 303         s->fe.demodulator_priv = s;
 304
 305         s->lnb_buf[1] = SET_LNB_POWER;
 306         s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */
 307
 308         return &s->fe;
 309 error:
 310         return NULL;
 311 }
 312
 313
 314 static struct dvb_frontend_ops vp702x_fe_ops = {
 315         .info = {
 316                 .name           = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S",
 317                 .type           = FE_QPSK,
 318                 .frequency_min       = 950000,
 319                 .frequency_max       = 2150000,
 320                 .frequency_stepsize  = 1000,   /* kHz for QPSK frontends */
 321                 .frequency_tolerance = 0,
 322                 .symbol_rate_min     = 1000000,
 323                 .symbol_rate_max     = 45000000,
 324                 .symbol_rate_tolerance = 500,  /* ppm */
 325                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 326                 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
 327                 FE_CAN_QPSK |
 328                 FE_CAN_FEC_AUTO
 329         },
 330         .release = vp702x_fe_release,
 331
 332         .init  = vp702x_fe_init,
 333         .sleep = vp702x_fe_sleep,
 334
 335         .set_frontend = vp702x_fe_set_frontend,
 336         .get_frontend = vp702x_fe_get_frontend,
 337         .get_tune_settings = vp702x_fe_get_tune_settings,
 338
 339         .read_status = vp702x_fe_read_status,
 340         .read_ber = vp702x_fe_read_ber,
 341         .read_signal_strength = vp702x_fe_read_signal_strength,
 342         .read_snr = vp702x_fe_read_snr,
 343         .read_ucblocks = vp702x_fe_read_unc_blocks,
 344
 345         .diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg,
 346         .diseqc_send_burst = vp702x_fe_send_diseqc_burst,
 347         .set_tone = vp702x_fe_set_tone,
 348         .set_voltage = vp702x_fe_set_voltage,
 349 };