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+/* DVB frontend part of the Linux driver for the TwinhanDTV StarBox USB2.0
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+ * DVB-S receiver.
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+ *
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+ * Copyright (C) 2005 Ralph Metzler <rjkm@metzlerbros.de>
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+ * Metzler Brothers Systementwicklung GbR
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+ *
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+ * Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@desy.de>
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+ *
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+ * Thanks to Twinhan who kindly provided hardware and information.
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+ *
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+ * This file can be removed soon, after the DST-driver is rewritten to provice
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+ * the frontend-controlling separately.
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License as published by the Free
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+ * Software Foundation, version 2.
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+ *
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+ * see Documentation/dvb/README.dvb-usb for more information
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+ *
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+ */
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+#include "vp702x.h"
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+
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+struct vp702x_fe_state {
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+ struct dvb_frontend fe;
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+ struct dvb_usb_device *d;
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+
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+ fe_sec_voltage_t voltage;
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+ fe_sec_tone_mode_t tone_mode;
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+
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+ u8 lnb_buf[8];
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+
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+ u8 lock;
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+ u8 sig;
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+ u8 snr;
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+
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+ unsigned long next_status_check;
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+ unsigned long status_check_interval;
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+};
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+
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+static int vp702x_fe_refresh_state(struct vp702x_fe_state *st)
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+{
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+ u8 buf[10];
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+ if (time_after(jiffies,st->next_status_check)) {
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+ vp702x_usb_in_op(st->d,READ_STATUS,0,0,buf,10);
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+
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+ st->lock = buf[4];
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+ vp702x_usb_in_op(st->d,READ_TUNER_REG_REQ,0x11,0,&st->snr,1);
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+ vp702x_usb_in_op(st->d,READ_TUNER_REG_REQ,0x15,0,&st->sig,1);
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+
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+ st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
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+ }
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+ return 0;
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+}
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+
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+static u8 vp702x_chksum(u8 *buf,int f, int count)
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+{
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+ u8 s = 0;
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+ int i;
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+ for (i = f; i < f+count; i++)
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+ s += buf[i];
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+ return ~s+1;
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+}
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+
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+static int vp702x_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
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+{
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+ struct vp702x_fe_state *st = fe->demodulator_priv;
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+ vp702x_fe_refresh_state(st);
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+ deb_fe("%s\n",__FUNCTION__);
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+
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+ if (st->lock == 0)
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+ *status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
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+ else
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+ *status = 0;
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+
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+ deb_fe("real state: %x\n",*status);
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+ *status = 0x1f;
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+
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+ if (*status & FE_HAS_LOCK)
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+ st->status_check_interval = 1000;
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+ else
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+ st->status_check_interval = 250;
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+ return 0;
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+}
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+
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+/* not supported by this Frontend */
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+static int vp702x_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
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+{
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+ struct vp702x_fe_state *st = fe->demodulator_priv;
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+ vp702x_fe_refresh_state(st);
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+ *ber = 0;
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+ return 0;
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+}
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+
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+/* not supported by this Frontend */
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+static int vp702x_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
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+{
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+ struct vp702x_fe_state *st = fe->demodulator_priv;
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+ vp702x_fe_refresh_state(st);
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+ *unc = 0;
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+ return 0;
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+}
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+
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+static int vp702x_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
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+{
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+ struct vp702x_fe_state *st = fe->demodulator_priv;
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+ vp702x_fe_refresh_state(st);
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+
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+ *strength = (st->sig << 8) | st->sig;
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+ return 0;
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+}
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+
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+static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
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+{
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+ u8 _snr;
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+ struct vp702x_fe_state *st = fe->demodulator_priv;
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+ vp702x_fe_refresh_state(st);
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+
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+ _snr = (st->snr & 0x1f) * 0xff / 0x1f;
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+ *snr = (_snr << 8) | _snr;
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+ return 0;
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+}
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+
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+static int vp702x_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
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+{
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+ deb_fe("%s\n",__FUNCTION__);
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+ tune->min_delay_ms = 2000;
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+ return 0;
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+}
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+
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+static int vp702x_fe_set_frontend(struct dvb_frontend* fe,
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+ struct dvb_frontend_parameters *fep)
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+{
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+ struct vp702x_fe_state *st = fe->demodulator_priv;
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+ u32 freq = fep->frequency/1000;
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+ /*CalFrequency*/
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+/* u16 frequencyRef[16] = { 2, 4, 8, 16, 32, 64, 128, 256, 24, 5, 10, 20, 40, 80, 160, 320 }; */
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+ u64 sr;
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+ u8 cmd[8] = { 0 },ibuf[10];
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+
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+ cmd[0] = (freq >> 8) & 0x7f;
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+ cmd[1] = freq & 0xff;
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+ cmd[2] = 1; /* divrate == 4 -> frequencyRef[1] -> 1 here */
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+
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+ sr = (u64) (fep->u.qpsk.symbol_rate/1000) << 20;
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+ do_div(sr,88000);
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+ cmd[3] = (sr >> 12) & 0xff;
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+ cmd[4] = (sr >> 4) & 0xff;
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+ cmd[5] = (sr << 4) & 0xf0;
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+
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+ deb_fe("setting frontend to: %u -> %u (%x) LNB-based GHz, symbolrate: %d -> %Lu (%Lx)\n",
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+ fep->frequency,freq,freq, fep->u.qpsk.symbol_rate, sr, sr);
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+
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+/* if (fep->inversion == INVERSION_ON)
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+ cmd[6] |= 0x80; */
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+
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+ if (st->voltage == SEC_VOLTAGE_18)
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+ cmd[6] |= 0x40;
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+
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+/* if (fep->u.qpsk.symbol_rate > 8000000)
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+ cmd[6] |= 0x20;
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+
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+ if (fep->frequency < 1531000)
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+ cmd[6] |= 0x04;
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+
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+ if (st->tone_mode == SEC_TONE_ON)
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+ cmd[6] |= 0x01;*/
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+
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+ cmd[7] = vp702x_chksum(cmd,0,7);
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+
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+ st->status_check_interval = 250;
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+ st->next_status_check = jiffies;
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+
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+ vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0);
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+ msleep(30);
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+ vp702x_usb_inout_op(st->d,cmd,8,ibuf,10,100);
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+
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+ if (ibuf[2] == 0 && ibuf[3] == 0)
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+ deb_fe("tuning failed.\n");
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+ else
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+ deb_fe("tuning succeeded.\n");
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+
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+ return 0;
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+}
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+
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+static int vp702x_fe_get_frontend(struct dvb_frontend* fe,
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+ struct dvb_frontend_parameters *fep)
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+{
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+ deb_fe("%s\n",__FUNCTION__);
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+ return 0;
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+}
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+
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+static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe,
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+ struct dvb_diseqc_master_cmd *m)
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+{
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+ struct vp702x_fe_state *st = fe->demodulator_priv;
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+ u8 cmd[8],ibuf[10];
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+ memset(cmd,0,8);
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+
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+ deb_fe("%s\n",__FUNCTION__);
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+
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+ if (m->msg_len > 4)
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+ return -EINVAL;
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+
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+ cmd[1] = SET_DISEQC_CMD;
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+ cmd[2] = m->msg_len;
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+ memcpy(&cmd[3], m->msg, m->msg_len);
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+ cmd[7] = vp702x_chksum(cmd,0,7);
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+
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+ vp702x_usb_inout_op(st->d,cmd,8,ibuf,10,100);
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+
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+ if (ibuf[2] == 0 && ibuf[3] == 0)
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+ deb_fe("diseqc cmd failed.\n");
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+ else
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+ deb_fe("diseqc cmd succeeded.\n");
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+
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+ return 0;
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+}
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+
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+static int vp702x_fe_send_diseqc_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
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+{
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+ deb_fe("%s\n",__FUNCTION__);
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+ return 0;
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+}
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+
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+static int vp702x_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
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+{
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+ struct vp702x_fe_state *st = fe->demodulator_priv;
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+ u8 ibuf[10];
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+ deb_fe("%s\n",__FUNCTION__);
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+
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+ st->tone_mode = tone;
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+
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+ if (tone == SEC_TONE_ON)
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+ st->lnb_buf[2] = 0x02;
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+ else
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+ st->lnb_buf[2] = 0x00;
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+
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+ st->lnb_buf[7] = vp702x_chksum(st->lnb_buf,0,7);
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+
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+ vp702x_usb_inout_op(st->d,st->lnb_buf,8,ibuf,10,100);
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+ if (ibuf[2] == 0 && ibuf[3] == 0)
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+ deb_fe("set_tone cmd failed.\n");
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+ else
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+ deb_fe("set_tone cmd succeeded.\n");
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+
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+ return 0;
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+}
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+
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+static int vp702x_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t
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+ voltage)
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+{
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+ struct vp702x_fe_state *st = fe->demodulator_priv;
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+ u8 ibuf[10];
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+ deb_fe("%s\n",__FUNCTION__);
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+
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+ st->voltage = voltage;
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+
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+ if (voltage != SEC_VOLTAGE_OFF)
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+ st->lnb_buf[4] = 0x01;
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+ else
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+ st->lnb_buf[4] = 0x00;
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+
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+ st->lnb_buf[7] = vp702x_chksum(st->lnb_buf,0,7);
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+
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+ vp702x_usb_inout_op(st->d,st->lnb_buf,8,ibuf,10,100);
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+ if (ibuf[2] == 0 && ibuf[3] == 0)
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+ deb_fe("set_voltage cmd failed.\n");
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+ else
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+ deb_fe("set_voltage cmd succeeded.\n");
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+
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+ return 0;
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+}
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+
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+static void vp702x_fe_release(struct dvb_frontend* fe)
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+{
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+ struct vp702x_fe_state *st = fe->demodulator_priv;
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+ kfree(st);
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+}
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+
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+static struct dvb_frontend_ops vp702x_fe_ops;
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+
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+struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d)
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+{
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+ struct vp702x_fe_state *s = kmalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL);
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+ if (s == NULL)
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+ goto error;
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+ memset(s,0,sizeof(struct vp702x_fe_state));
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+
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+ s->d = d;
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+ s->fe.ops = &vp702x_fe_ops;
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+ s->fe.demodulator_priv = s;
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+
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+ s->lnb_buf[1] = SET_LNB_POWER;
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+ s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */
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+
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+ goto success;
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+error:
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+ return NULL;
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+success:
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+ return &s->fe;
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+}
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+
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+
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+static struct dvb_frontend_ops vp702x_fe_ops = {
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+ .info = {
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+ .name = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S",
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+ .type = FE_QPSK,
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+ .frequency_min = 950000,
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+ .frequency_max = 2150000,
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+ .frequency_stepsize = 1000, /* kHz for QPSK frontends */
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+ .frequency_tolerance = 0,
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+ .symbol_rate_min = 1000000,
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+ .symbol_rate_max = 45000000,
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+ .symbol_rate_tolerance = 500, /* ppm */
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+ .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
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+ FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
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+ FE_CAN_QPSK |
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+ FE_CAN_FEC_AUTO
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+ },
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+ .release = vp702x_fe_release,
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+
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+ .init = NULL,
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+ .sleep = NULL,
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+
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+ .set_frontend = vp702x_fe_set_frontend,
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+ .get_frontend = vp702x_fe_get_frontend,
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+ .get_tune_settings = vp702x_fe_get_tune_settings,
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+
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+ .read_status = vp702x_fe_read_status,
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+ .read_ber = vp702x_fe_read_ber,
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+ .read_signal_strength = vp702x_fe_read_signal_strength,
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+ .read_snr = vp702x_fe_read_snr,
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+ .read_ucblocks = vp702x_fe_read_unc_blocks,
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+
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+ .diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg,
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+ .diseqc_send_burst = vp702x_fe_send_diseqc_burst,
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+ .set_tone = vp702x_fe_set_tone,
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+ .set_voltage = vp702x_fe_set_voltage,
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+};
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