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;
  45
  46         if (time_after(jiffies, st->next_status_check)) {
  47                 buf = kmalloc(10, GFP_KERNEL);
  48                 if (!buf) {
  49                         deb_fe("%s: buffer alloc failed\n", __func__);
  50                         return -ENOMEM;
  51                 }
  52                 vp702x_usb_in_op(st->d, READ_STATUS, 0, 0, buf, 10);
  53                 st->lock = buf[4];
  54
  55                 vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x11, 0, buf, 1);
  56                 st->snr = buf[0];
  57
  58                 vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x15, 0, buf, 1);
  59                 st->sig = buf[0];
  60
  61
  62                 st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
  63                 kfree(buf);
  64         }
  65         return 0;
  66 }
  67
  68 static u8 vp702x_chksum(u8 *buf,int f, int count)
  69 {
  70         u8 s = 0;
  71         int i;
  72         for (i = f; i < f+count; i++)
  73                 s += buf[i];
  74         return ~s+1;
  75 }
  76
  77 static int vp702x_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
  78 {
  79         struct vp702x_fe_state *st = fe->demodulator_priv;
  80         vp702x_fe_refresh_state(st);
  81         deb_fe("%s\n",__func__);
  82
  83         if (st->lock == 0)
  84                 *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
  85         else
  86                 *status = 0;
  87
  88         if (*status & FE_HAS_LOCK)
  89                 st->status_check_interval = 1000;
  90         else
  91                 st->status_check_interval = 250;
  92         return 0;
  93 }
  94
  95 /* not supported by this Frontend */
  96 static int vp702x_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
  97 {
  98         struct vp702x_fe_state *st = fe->demodulator_priv;
  99         vp702x_fe_refresh_state(st);
 100         *ber = 0;
 101         return 0;
 102 }
 103
 104 /* not supported by this Frontend */
 105 static int vp702x_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
 106 {
 107         struct vp702x_fe_state *st = fe->demodulator_priv;
 108         vp702x_fe_refresh_state(st);
 109         *unc = 0;
 110         return 0;
 111 }
 112
 113 static int vp702x_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
 114 {
 115         struct vp702x_fe_state *st = fe->demodulator_priv;
 116         vp702x_fe_refresh_state(st);
 117
 118         *strength = (st->sig << 8) | st->sig;
 119         return 0;
 120 }
 121
 122 static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
 123 {
 124         u8 _snr;
 125         struct vp702x_fe_state *st = fe->demodulator_priv;
 126         vp702x_fe_refresh_state(st);
 127
 128         _snr = (st->snr & 0x1f) * 0xff / 0x1f;
 129         *snr = (_snr << 8) | _snr;
 130         return 0;
 131 }
 132
 133 static int vp702x_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
 134 {
 135         deb_fe("%s\n",__func__);
 136         tune->min_delay_ms = 2000;
 137         return 0;
 138 }
 139
 140 static int vp702x_fe_set_frontend(struct dvb_frontend* fe,
 141                                   struct dvb_frontend_parameters *fep)
 142 {
 143         struct vp702x_fe_state *st = fe->demodulator_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         cmd = kzalloc(10, GFP_KERNEL);
 151         if (!cmd)
 152                 return -ENOMEM;
 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         kfree(cmd);
 196         return 0;
 197 }
 198
 199 static int vp702x_fe_init(struct dvb_frontend *fe)
 200 {
 201         struct vp702x_fe_state *st = fe->demodulator_priv;
 202         deb_fe("%s\n",__func__);
 203         vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0);
 204         return 0;
 205 }
 206
 207 static int vp702x_fe_sleep(struct dvb_frontend *fe)
 208 {
 209         deb_fe("%s\n",__func__);
 210         return 0;
 211 }
 212
 213 static int vp702x_fe_get_frontend(struct dvb_frontend* fe,
 214                                   struct dvb_frontend_parameters *fep)
 215 {
 216         deb_fe("%s\n",__func__);
 217         return 0;
 218 }
 219
 220 static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe,
 221                                     struct dvb_diseqc_master_cmd *m)
 222 {
 223         int ret;
 224         u8 *cmd;
 225         struct vp702x_fe_state *st = fe->demodulator_priv;
 226
 227         cmd = kzalloc(10, GFP_KERNEL);
 228         if (!cmd)
 229                 return -ENOMEM;
 230
 231         deb_fe("%s\n",__func__);
 232
 233         if (m->msg_len > 4) {
 234                 ret = -EINVAL;
 235                 goto out;
 236         }
 237
 238         cmd[1] = SET_DISEQC_CMD;
 239         cmd[2] = m->msg_len;
 240         memcpy(&cmd[3], m->msg, m->msg_len);
 241         cmd[7] = vp702x_chksum(cmd, 0, 7);
 242
 243         vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100);
 244
 245         if (cmd[2] == 0 && cmd[3] == 0)
 246                 deb_fe("diseqc cmd failed.\n");
 247         else
 248                 deb_fe("diseqc cmd succeeded.\n");
 249         ret = 0;
 250 out:
 251         kfree(cmd);
 252         return ret;
 253 }
 254
 255 static int vp702x_fe_send_diseqc_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
 256 {
 257         deb_fe("%s\n",__func__);
 258         return 0;
 259 }
 260
 261 static int vp702x_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 262 {
 263         struct vp702x_fe_state *st = fe->demodulator_priv;
 264         u8 *buf;
 265
 266         deb_fe("%s\n",__func__);
 267
 268         buf = kmalloc(10, GFP_KERNEL);
 269         if (!buf)
 270                 return -ENOMEM;
 271
 272         st->tone_mode = tone;
 273
 274         if (tone == SEC_TONE_ON)
 275                 st->lnb_buf[2] = 0x02;
 276         else
 277                 st->lnb_buf[2] = 0x00;
 278
 279         st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);
 280         memcpy(buf, st->lnb_buf, 8);
 281
 282         vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);
 283         if (buf[2] == 0 && buf[3] == 0)
 284                 deb_fe("set_tone cmd failed.\n");
 285         else
 286                 deb_fe("set_tone cmd succeeded.\n");
 287
 288         kfree(buf);
 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         u8 *buf;
 297         deb_fe("%s\n",__func__);
 298
 299         buf = kmalloc(10, GFP_KERNEL);
 300         if (!buf)
 301                 return -ENOMEM;
 302
 303         st->voltage = voltage;
 304
 305         if (voltage != SEC_VOLTAGE_OFF)
 306                 st->lnb_buf[4] = 0x01;
 307         else
 308                 st->lnb_buf[4] = 0x00;
 309
 310         st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);
 311         memcpy(buf, st->lnb_buf, 8);
 312
 313         vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);
 314         if (buf[2] == 0 && buf[3] == 0)
 315                 deb_fe("set_voltage cmd failed.\n");
 316         else
 317                 deb_fe("set_voltage cmd succeeded.\n");
 318
 319         kfree(buf);
 320         return 0;
 321 }
 322
 323 static void vp702x_fe_release(struct dvb_frontend* fe)
 324 {
 325         struct vp702x_fe_state *st = fe->demodulator_priv;
 326         kfree(st);
 327 }
 328
 329 static struct dvb_frontend_ops vp702x_fe_ops;
 330
 331 struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d)
 332 {
 333         struct vp702x_fe_state *s = kzalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL);
 334         if (s == NULL)
 335                 goto error;
 336
 337         s->d = d;
 338
 339         memcpy(&s->fe.ops,&vp702x_fe_ops,sizeof(struct dvb_frontend_ops));
 340         s->fe.demodulator_priv = s;
 341
 342         s->lnb_buf[1] = SET_LNB_POWER;
 343         s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */
 344
 345         return &s->fe;
 346 error:
 347         return NULL;
 348 }
 349
 350
 351 static struct dvb_frontend_ops vp702x_fe_ops = {
 352         .info = {
 353                 .name           = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S",
 354                 .type           = FE_QPSK,
 355                 .frequency_min       = 950000,
 356                 .frequency_max       = 2150000,
 357                 .frequency_stepsize  = 1000,   /* kHz for QPSK frontends */
 358                 .frequency_tolerance = 0,
 359                 .symbol_rate_min     = 1000000,
 360                 .symbol_rate_max     = 45000000,
 361                 .symbol_rate_tolerance = 500,  /* ppm */
 362                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 363                 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
 364                 FE_CAN_QPSK |
 365                 FE_CAN_FEC_AUTO
 366         },
 367         .release = vp702x_fe_release,
 368
 369         .init  = vp702x_fe_init,
 370         .sleep = vp702x_fe_sleep,
 371
 372         .set_frontend = vp702x_fe_set_frontend,
 373         .get_frontend = vp702x_fe_get_frontend,
 374         .get_tune_settings = vp702x_fe_get_tune_settings,
 375
 376         .read_status = vp702x_fe_read_status,
 377         .read_ber = vp702x_fe_read_ber,
 378         .read_signal_strength = vp702x_fe_read_signal_strength,
 379         .read_snr = vp702x_fe_read_snr,
 380         .read_ucblocks = vp702x_fe_read_unc_blocks,
 381
 382         .diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg,
 383         .diseqc_send_burst = vp702x_fe_send_diseqc_burst,
 384         .set_tone = vp702x_fe_set_tone,
 385         .set_voltage = vp702x_fe_set_voltage,
 386 };