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-patch

+int setup_unicable (int frontend_fd, const uint32_t frequency, int unicable_chan, int unicable_freq, int pol, int band)
+{
+        struct dvb_diseqc_master_cmd cmd = { { 0xe0, 0x10, 0x5a, 0x00, 0x00, 0x00 }, 5 };
+        unsigned int t = (frequency / 1000 + unicable_freq + 2) / 4 - 350;
+        uint32_t ret = (t + 350) * 4000 - frequency;
+        cmd.msg[3] = (t >> 8)                   |       /* highest 3 bits of t */
+                (unicable_chan << 5)            |       /* adress */
+                (0x00 << 4)                     |       /* input 0/1 */
+                (pol << 3)                      |       /* horizontal == 0x08 */
+                (band) << 2;                            /* high_band  == 0x04 */
+        cmd.msg[4] = t & 0xFF;
+        ioctl(frontend_fd, FE_SET_TONE, SEC_TONE_OFF);
+        ioctl(frontend_fd, FE_SET_VOLTAGE, SEC_VOLTAGE_18);
+        usleep(15 * 1000);
+        ioctl(frontend_fd, FE_DISEQC_SEND_MASTER_CMD, cmd);
+        usleep(50 * 1000);
+        ioctl(frontend_fd, FE_SET_VOLTAGE, SEC_VOLTAGE_13);
+        return ret;

D1:
  (7..5) Benutzer-Band
  (4)    Satelliten Position: 'A' = 0, 'B' = 1
  (3)    Polarisation: 'V' = 0, 'H' = 1
  (2)    High Band: low = 0, high = 1
  (1..0) Tuning Word MSB

D2:
  (7..0) Tuning Word LSB:
         TuningWord = round(fVCO/4MHz - 350) = round((abs(fSat - fLO) + fUser)/4 - 350)

D3:
  (7..0) PIN

 example:
 fSat = 11837MHz, Horizontal, LNB = (9750/10600/11700)MHz, PIN=20
 User freq = 1400MHz auf Kanal-ID = 0.
 1. do we use highband? what LO freq?
    11837MHz > 11700MHz -> fLO = 10600MHz, hiband = 1
 2. calculate vco freq
    f_vco_goal = abs(f_transponder - f_LO) + f_userband = abs(11837MHz - 10600MHz) + 1400MHz = 2637MHz
 3. calculate 4MHz divider and substract constant value 350)
    (f_vco_goal / 4MHz) - 350 = 659.0 - 350 = 309.0
 4. round value to hit middle of userband as near as possible
    round(309.0) = 309 = 0x0135
 5. program lnb vco value
    D1 : bit(7..5) = 0 (id); bit(0..1) = (309 >> 8) & 0x3
    D3 : bit(7..0) = PIN   -> D1 D2 D3 = 0x01 0x35 0x14  
    hiband = 1             -> D1 D2 D3 = 0x05 0x35 0x14
    horizontal             -> D1 D2 D3 = 0x0D 0x35 0x14
    send DISEQC seq = 0xE0 0x00 0x5C 0x0D 0x35 0x14 oder mit Diseqc Adresse: 0xE0 0x10 0x5C 0x0D 0x35 0x14
 6. as the vco is programmed in 4MHz steps, and we did rounding, we will get up to +/-2MHz frequency offset rel. to middle of user band
    f_vco_real = 4MHz * (tuning_word + 350) = 2636MHz
 7. freq_offset = f_vco_real - f_vco_goal = 2636MHz - 2637MHz = -1MHz
 8. tune dvb tuner
    f_userband + freq_offset = (1400MHz - 1MHz) = 1399MHz