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         fe_sec_voltage_t voltage;
  28         fe_sec_tone_mode_t tone_mode;
  29
  30         u8 lnb_buf[8];
  31
  32         u8 lock;
  33         u8 sig;
  34         u8 snr;
  35
  36         unsigned long next_status_check;
  37         unsigned long status_check_interval;
  38 };
  39
  40 static int vp702x_fe_refresh_state(struct vp702x_fe_state *st)
  41 {
  42         u8 buf[10];
  43         if (time_after(jiffies,st->next_status_check)) {
  44                 vp702x_usb_in_op(st->d,READ_STATUS,0,0,buf,10);
  45
  46                 st->lock = buf[4];
  47                 vp702x_usb_in_op(st->d,READ_TUNER_REG_REQ,0x11,0,&st->snr,1);
  48                 vp702x_usb_in_op(st->d,READ_TUNER_REG_REQ,0x15,0,&st->sig,1);
  49
  50                 st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
  51         }
  52         return 0;
  53 }
  54
  55 static u8 vp702x_chksum(u8 *buf,int f, int count)
  56 {
  57         u8 s = 0;
  58         int i;
  59         for (i = f; i < f+count; i++)
  60                 s += buf[i];
  61         return ~s+1;
  62 }
  63
  64 static int vp702x_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
  65 {
  66         struct vp702x_fe_state *st = fe->demodulator_priv;
  67         vp702x_fe_refresh_state(st);
  68         deb_fe("%s\n",__FUNCTION__);
  69
  70         if (st->lock == 0)
  71                 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
  72         else
  73                 *status = 0;
  74
  75         deb_fe("real state: %x\n",*status);
  76         *status = 0x1f;
  77
  78         if (*status & FE_HAS_LOCK)
  79                 st->status_check_interval = 1000;
  80         else
  81                 st->status_check_interval = 250;
  82         return 0;
  83 }
  84
  85 /* not supported by this Frontend */
  86 static int vp702x_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
  87 {
  88         struct vp702x_fe_state *st = fe->demodulator_priv;
  89         vp702x_fe_refresh_state(st);
  90         *ber = 0;
  91         return 0;
  92 }
  93
  94 /* not supported by this Frontend */
  95 static int vp702x_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
  96 {
  97         struct vp702x_fe_state *st = fe->demodulator_priv;
  98         vp702x_fe_refresh_state(st);
  99         *unc = 0;
 100         return 0;
 101 }
 102
 103 static int vp702x_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
 104 {
 105         struct vp702x_fe_state *st = fe->demodulator_priv;
 106         vp702x_fe_refresh_state(st);
 107
 108         *strength = (st->sig << 8) | st->sig;
 109         return 0;
 110 }
 111
 112 static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
 113 {
 114         u8 _snr;
 115         struct vp702x_fe_state *st = fe->demodulator_priv;
 116         vp702x_fe_refresh_state(st);
 117
 118         _snr = (st->snr & 0x1f) * 0xff / 0x1f;
 119         *snr = (_snr << 8) | _snr;
 120         return 0;
 121 }
 122
 123 static int vp702x_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
 124 {
 125         deb_fe("%s\n",__FUNCTION__);
 126         tune->min_delay_ms = 2000;
 127         return 0;
 128 }
 129
 130 static int vp702x_fe_set_frontend(struct dvb_frontend* fe,
 131                                   struct dvb_frontend_parameters *fep)
 132 {
 133         struct vp702x_fe_state *st = fe->demodulator_priv;
 134         u32 freq = fep->frequency/1000;
 135         /*CalFrequency*/
 136 /*      u16 frequencyRef[16] = { 2, 4, 8, 16, 32, 64, 128, 256, 24, 5, 10, 20, 40, 80, 160, 320 }; */
 137         u64 sr;
 138         u8 cmd[8] = { 0 },ibuf[10];
 139
 140         cmd[0] = (freq >> 8) & 0x7f;
 141         cmd[1] =  freq       & 0xff;
 142         cmd[2] = 1; /* divrate == 4 -> frequencyRef[1] -> 1 here */
 143
 144         sr = (u64) (fep->u.qpsk.symbol_rate/1000) << 20;
 145         do_div(sr,88000);
 146         cmd[3] = (sr >> 12) & 0xff;
 147         cmd[4] = (sr >> 4)  & 0xff;
 148         cmd[5] = (sr << 4)  & 0xf0;
 149
 150         deb_fe("setting frontend to: %u -> %u (%x) LNB-based GHz, symbolrate: %d -> %lu (%lx)\n",
 151                         fep->frequency,freq,freq, fep->u.qpsk.symbol_rate,
 152                         (unsigned long) sr, (unsigned long) sr);
 153
 154 /*      if (fep->inversion == INVERSION_ON)
 155                 cmd[6] |= 0x80; */
 156
 157         if (st->voltage == SEC_VOLTAGE_18)
 158                 cmd[6] |= 0x40;
 159
 160 /*      if (fep->u.qpsk.symbol_rate > 8000000)
 161                 cmd[6] |= 0x20;
 162
 163         if (fep->frequency < 1531000)
 164                 cmd[6] |= 0x04;
 165
 166         if (st->tone_mode == SEC_TONE_ON)
 167                 cmd[6] |= 0x01;*/
 168
 169         cmd[7] = vp702x_chksum(cmd,0,7);
 170
 171         st->status_check_interval = 250;
 172         st->next_status_check = jiffies;
 173
 174         vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0);
 175         msleep(30);
 176         vp702x_usb_inout_op(st->d,cmd,8,ibuf,10,100);
 177
 178         if (ibuf[2] == 0 && ibuf[3] == 0)
 179                 deb_fe("tuning failed.\n");
 180         else
 181                 deb_fe("tuning succeeded.\n");
 182
 183         return 0;
 184 }
 185
 186 static int vp702x_fe_get_frontend(struct dvb_frontend* fe,
 187                                   struct dvb_frontend_parameters *fep)
 188 {
 189         deb_fe("%s\n",__FUNCTION__);
 190         return 0;
 191 }
 192
 193 static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe,
 194                                     struct dvb_diseqc_master_cmd *m)
 195 {
 196         struct vp702x_fe_state *st = fe->demodulator_priv;
 197         u8 cmd[8],ibuf[10];
 198         memset(cmd,0,8);
 199
 200         deb_fe("%s\n",__FUNCTION__);
 201
 202         if (m->msg_len > 4)
 203                 return -EINVAL;
 204
 205         cmd[1] = SET_DISEQC_CMD;
 206         cmd[2] = m->msg_len;
 207         memcpy(&cmd[3], m->msg, m->msg_len);
 208         cmd[7] = vp702x_chksum(cmd,0,7);
 209
 210         vp702x_usb_inout_op(st->d,cmd,8,ibuf,10,100);
 211
 212         if (ibuf[2] == 0 && ibuf[3] == 0)
 213                 deb_fe("diseqc cmd failed.\n");
 214         else
 215                 deb_fe("diseqc cmd succeeded.\n");
 216
 217         return 0;
 218 }
 219
 220 static int vp702x_fe_send_diseqc_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
 221 {
 222         deb_fe("%s\n",__FUNCTION__);
 223         return 0;
 224 }
 225
 226 static int vp702x_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 227 {
 228         struct vp702x_fe_state *st = fe->demodulator_priv;
 229         u8 ibuf[10];
 230         deb_fe("%s\n",__FUNCTION__);
 231
 232         st->tone_mode = tone;
 233
 234         if (tone == SEC_TONE_ON)
 235                 st->lnb_buf[2] = 0x02;
 236         else
 237                 st->lnb_buf[2] = 0x00;
 238
 239         st->lnb_buf[7] = vp702x_chksum(st->lnb_buf,0,7);
 240
 241         vp702x_usb_inout_op(st->d,st->lnb_buf,8,ibuf,10,100);
 242         if (ibuf[2] == 0 && ibuf[3] == 0)
 243                 deb_fe("set_tone cmd failed.\n");
 244         else
 245                 deb_fe("set_tone cmd succeeded.\n");
 246
 247         return 0;
 248 }
 249
 250 static int vp702x_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t
 251                 voltage)
 252 {
 253         struct vp702x_fe_state *st = fe->demodulator_priv;
 254         u8 ibuf[10];
 255         deb_fe("%s\n",__FUNCTION__);
 256
 257         st->voltage = voltage;
 258
 259         if (voltage != SEC_VOLTAGE_OFF)
 260                 st->lnb_buf[4] = 0x01;
 261         else
 262                 st->lnb_buf[4] = 0x00;
 263
 264         st->lnb_buf[7] = vp702x_chksum(st->lnb_buf,0,7);
 265
 266         vp702x_usb_inout_op(st->d,st->lnb_buf,8,ibuf,10,100);
 267         if (ibuf[2] == 0 && ibuf[3] == 0)
 268                 deb_fe("set_voltage cmd failed.\n");
 269         else
 270                 deb_fe("set_voltage cmd succeeded.\n");
 271
 272         return 0;
 273 }
 274
 275 static void vp702x_fe_release(struct dvb_frontend* fe)
 276 {
 277         struct vp702x_fe_state *st = fe->demodulator_priv;
 278         kfree(st);
 279 }
 280
 281 static struct dvb_frontend_ops vp702x_fe_ops;
 282
 283 struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d)
 284 {
 285         struct vp702x_fe_state *s = kzalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL);
 286         if (s == NULL)
 287                 goto error;
 288
 289         s->d = d;
 290         s->fe.ops = &vp702x_fe_ops;
 291         s->fe.demodulator_priv = s;
 292
 293         s->lnb_buf[1] = SET_LNB_POWER;
 294         s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */
 295
 296         goto success;
 297 error:
 298         return NULL;
 299 success:
 300         return &s->fe;
 301 }
 302
 303
 304 static struct dvb_frontend_ops vp702x_fe_ops = {
 305         .info = {
 306                 .name           = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S",
 307                 .type           = FE_QPSK,
 308                 .frequency_min       = 950000,
 309                 .frequency_max       = 2150000,
 310                 .frequency_stepsize  = 1000,   /* kHz for QPSK frontends */
 311                 .frequency_tolerance = 0,
 312                 .symbol_rate_min     = 1000000,
 313                 .symbol_rate_max     = 45000000,
 314                 .symbol_rate_tolerance = 500,  /* ppm */
 315                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 316                 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
 317                 FE_CAN_QPSK |
 318                 FE_CAN_FEC_AUTO
 319         },
 320         .release = vp702x_fe_release,
 321
 322         .init = NULL,
 323         .sleep = NULL,
 324
 325         .set_frontend = vp702x_fe_set_frontend,
 326         .get_frontend = vp702x_fe_get_frontend,
 327         .get_tune_settings = vp702x_fe_get_tune_settings,
 328
 329         .read_status = vp702x_fe_read_status,
 330         .read_ber = vp702x_fe_read_ber,
 331         .read_signal_strength = vp702x_fe_read_signal_strength,
 332         .read_snr = vp702x_fe_read_snr,
 333         .read_ucblocks = vp702x_fe_read_unc_blocks,
 334
 335         .diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg,
 336         .diseqc_send_burst = vp702x_fe_send_diseqc_burst,
 337         .set_tone = vp702x_fe_set_tone,
 338         .set_voltage = vp702x_fe_set_voltage,
 339 };