/* DVB frontend part of the Linux driver for TwinhanDTV Alpha/MagicBoxII USB2.0 * DVB-T receiver. * * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de) * * Thanks to Twinhan who kindly provided hardware and information. * *	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 "vp7045.h"/* It is a Zarlink MT352 within a Samsung Tuner (DNOS404ZH102A) - 040929 - AAT * * Programming is hidden inside the firmware, so set_frontend is very easy. * Even though there is a Firmware command that one can use to access the demod * via its registers. This is used for status information. */struct vp7045_fe_state {	struct dvb_frontend fe;	struct dvb_usb_device *d;};static int vp7045_fe_read_status(struct dvb_frontend* fe, fe_status_t *status){	struct vp7045_fe_state *state = fe->demodulator_priv;	u8 s0 = vp7045_read_reg(state->d,0x00),	   s1 = vp7045_read_reg(state->d,0x01),	   s3 = vp7045_read_reg(state->d,0x03);	*status = 0;	if (s0 & (1 << 4))		*status |= FE_HAS_CARRIER;	if (s0 & (1 << 1))		*status |= FE_HAS_VITERBI;	if (s0 & (1 << 5))		*status |= FE_HAS_LOCK;	if (s1 & (1 << 1))		*status |= FE_HAS_SYNC;	if (s3 & (1 << 6))		*status |= FE_HAS_SIGNAL;	if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=			(FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))		*status &= ~FE_HAS_LOCK;	return 0;}static int vp7045_fe_read_ber(struct dvb_frontend* fe, u32 *ber){	struct vp7045_fe_state *state = fe->demodulator_priv;	*ber = (vp7045_read_reg(state->d, 0x0D) << 16) |	       (vp7045_read_reg(state->d, 0x0E) << 8) |	        vp7045_read_reg(state->d, 0x0F);	return 0;}static int vp7045_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc){	struct vp7045_fe_state *state = fe->demodulator_priv;	*unc = (vp7045_read_reg(state->d, 0x10) << 8) |		    vp7045_read_reg(state->d, 0x11);	return 0;}static int vp7045_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength){	struct vp7045_fe_state *state = fe->demodulator_priv;	u16 signal = (vp7045_read_reg(state->d, 0x14) << 8) |		vp7045_read_reg(state->d, 0x15);	*strength = ~signal;	return 0;}static int vp7045_fe_read_snr(struct dvb_frontend* fe, u16 *snr){	struct vp7045_fe_state *state = fe->demodulator_priv;	u8 _snr = vp7045_read_reg(state->d, 0x09);	*snr = (_snr << 8) | _snr;	return 0;}static int vp7045_fe_init(struct dvb_frontend* fe){	return 0;}static int vp7045_fe_sleep(struct dvb_frontend* fe){	return 0;}static int vp7045_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune){	tune->min_delay_ms = 800;	return 0;}static int vp7045_fe_set_frontend(struct dvb_frontend* fe,				  struct dvb_frontend_parameters *fep){	struct vp7045_fe_state *state = fe->demodulator_priv;	u8 buf[5];	u32 freq = fep->frequency / 1000;	buf[0] = (freq >> 16) & 0xff;	buf[1] = (freq >>  8) & 0xff;	buf[2] =  freq        & 0xff;	buf[3] = 0;	switch (fep->u.ofdm.bandwidth) {		case BANDWIDTH_8_MHZ: buf[4] = 8; break;		case BANDWIDTH_7_MHZ: buf[4] = 7; break;		case BANDWIDTH_6_MHZ: buf[4] = 6; break;		case BANDWIDTH_AUTO: return -EOPNOTSUPP;		default:			return -EINVAL;	}	vp7045_usb_op(state->d,LOCK_TUNER_COMMAND,buf,5,NULL,0,200);	return 0;}static int vp7045_fe_get_frontend(struct dvb_frontend* fe,				  struct dvb_frontend_parameters *fep){	return 0;}static void vp7045_fe_release(struct dvb_frontend* fe){	struct vp7045_fe_state *state = fe->demodulator_priv;	kfree(state);}static struct dvb_frontend_ops vp7045_fe_ops;struct dvb_frontend * vp7045_fe_attach(struct dvb_usb_device *d){	struct vp7045_fe_state *s = kmalloc(sizeof(struct vp7045_fe_state), GFP_KERNEL);	if (s == NULL)		goto error;	memset(s,0,sizeof(struct vp7045_fe_state));	s->d = d;	s->fe.ops = &vp7045_fe_ops;	s->fe.demodulator_priv = s;	goto success;error:	return NULL;success:	return &s->fe;}static struct dvb_frontend_ops vp7045_fe_ops = {	.info = {		.name			= "Twinhan VP7045/46 USB DVB-T",		.type			= FE_OFDM,		.frequency_min		= 44250000,		.frequency_max		= 867250000,		.frequency_stepsize	= 1000,		.caps = FE_CAN_INVERSION_AUTO |				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_FEC_AUTO |				FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |				FE_CAN_TRANSMISSION_MODE_AUTO |				FE_CAN_GUARD_INTERVAL_AUTO |				FE_CAN_RECOVER |				FE_CAN_HIERARCHY_AUTO,	},	.release = vp7045_fe_release,	.init = vp7045_fe_init,	.sleep = vp7045_fe_sleep,	.set_frontend = vp7045_fe_set_frontend,	.get_frontend = vp7045_fe_get_frontend,	.get_tune_settings = vp7045_fe_get_tune_settings,	.read_status = vp7045_fe_read_status,	.read_ber = vp7045_fe_read_ber,	.read_signal_strength = vp7045_fe_read_signal_strength,	.read_snr = vp7045_fe_read_snr,	.read_ucblocks = vp7045_fe_read_unc_blocks,};