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