Release 4.7 drivers/media/usb/dvb-usb/cinergyT2-fe.c

Directory: drivers/media/usb/dvb-usb
/*
 * TerraTec Cinergy T2/qanu USB2 DVB-T adapter.
 *
 * Copyright (C) 2007 Tomi Orava (tomimo@ncircle.nullnet.fi)
 *
 * Based on the dvb-usb-framework code and the
 * original Terratec Cinergy T2 driver by:
 *
 * Copyright (C) 2004 Daniel Mack <daniel@qanu.de> and
 *                  Holger Waechtler <holger@qanu.de>
 *
 *  Protocol Spec published on http://qanu.de/specs/terratec_cinergyT2.pdf
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include "cinergyT2.h"


/**
 *  convert linux-dvb frontend parameter set into TPS.
 *  See ETSI ETS-300744, section 4.6.2, table 9 for details.
 *
 *  This function is probably reusable and may better get placed in a support
 *  library.
 *
 *  We replace errornous fields by default TPS fields (the ones with value 0).
 */



static uint16_t compute_tps(struct dtv_frontend_properties *op)
{
	uint16_t tps = 0;

	switch (op->code_rate_HP) {
	case FEC_2_3:
		tps |= (1 << 7);
		break;
	case FEC_3_4:
		tps |= (2 << 7);
		break;
	case FEC_5_6:
		tps |= (3 << 7);
		break;
	case FEC_7_8:
		tps |= (4 << 7);
		break;
	case FEC_1_2:
	case FEC_AUTO:
	default:
		/* tps |= (0 << 7) */;
	}

	switch (op->code_rate_LP) {
	case FEC_2_3:
		tps |= (1 << 4);
		break;
	case FEC_3_4:
		tps |= (2 << 4);
		break;
	case FEC_5_6:
		tps |= (3 << 4);
		break;
	case FEC_7_8:
		tps |= (4 << 4);
		break;
	case FEC_1_2:
	case FEC_AUTO:
	default:
		/* tps |= (0 << 4) */;
	}

	switch (op->modulation) {
	case QAM_16:
		tps |= (1 << 13);
		break;
	case QAM_64:
		tps |= (2 << 13);
		break;
	case QPSK:
	default:
		/* tps |= (0 << 13) */;
	}

	switch (op->transmission_mode) {
	case TRANSMISSION_MODE_8K:
		tps |= (1 << 0);
		break;
	case TRANSMISSION_MODE_2K:
	default:
		/* tps |= (0 << 0) */;
	}

	switch (op->guard_interval) {
	case GUARD_INTERVAL_1_16:
		tps |= (1 << 2);
		break;
	case GUARD_INTERVAL_1_8:
		tps |= (2 << 2);
		break;
	case GUARD_INTERVAL_1_4:
		tps |= (3 << 2);
		break;
	case GUARD_INTERVAL_1_32:
	default:
		/* tps |= (0 << 2) */;
	}

	switch (op->hierarchy) {
	case HIERARCHY_1:
		tps |= (1 << 10);
		break;
	case HIERARCHY_2:
		tps |= (2 << 10);
		break;
	case HIERARCHY_4:
		tps |= (3 << 10);
		break;
	case HIERARCHY_NONE:
	default:
		/* tps |= (0 << 10) */;
	}

	return tps;
}

Contributors
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tomi orava tomi orava 309 98.72% 1 50.00%
mauro carvalho chehab mauro carvalho chehab 4 1.28% 1 50.00%
Total 313 100.00% 2 100.00%


struct cinergyt2_fe_state {
	
struct dvb_frontend fe;
	
struct dvb_usb_device *d;
};



static int cinergyt2_fe_read_status(struct dvb_frontend *fe,
				    enum fe_status *status)
{
	struct cinergyt2_fe_state *state = fe->demodulator_priv;
	struct dvbt_get_status_msg result;
	u8 cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
	int ret;

	ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (u8 *)&result,
			sizeof(result), 0);
	if (ret < 0)
		return ret;

	*status = 0;

	if (0xffff - le16_to_cpu(result.gain) > 30)
		*status |= FE_HAS_SIGNAL;
	if (result.lock_bits & (1 << 6))
		*status |= FE_HAS_LOCK;
	if (result.lock_bits & (1 << 5))
		*status |= FE_HAS_SYNC;
	if (result.lock_bits & (1 << 4))
		*status |= FE_HAS_CARRIER;
	if (result.lock_bits & (1 << 1))
		*status |= FE_HAS_VITERBI;

	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;
}

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tomi orava tomi orava 200 99.01% 1 50.00%
mauro carvalho chehab mauro carvalho chehab 2 0.99% 1 50.00%
Total 202 100.00% 2 100.00%



static int cinergyt2_fe_read_ber(struct dvb_frontend *fe, u32 *ber)
{
	struct cinergyt2_fe_state *state = fe->demodulator_priv;
	struct dvbt_get_status_msg status;
	char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
	int ret;

	ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
				sizeof(status), 0);
	if (ret < 0)
		return ret;

	*ber = le32_to_cpu(status.viterbi_error_rate);
	return 0;
}

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tomi orava tomi orava 91 100.00% 1 100.00%
Total 91 100.00% 1 100.00%



static int cinergyt2_fe_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
{
	struct cinergyt2_fe_state *state = fe->demodulator_priv;
	struct dvbt_get_status_msg status;
	u8 cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
	int ret;

	ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (u8 *)&status,
				sizeof(status), 0);
	if (ret < 0) {
		err("cinergyt2_fe_read_unc_blocks() Failed! (Error=%d)\n",
			ret);
		return ret;
	}
	*unc = le32_to_cpu(status.uncorrected_block_count);
	return 0;
}

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tomi orava tomi orava 100 100.00% 1 100.00%
Total 100 100.00% 1 100.00%



static int cinergyt2_fe_read_signal_strength(struct dvb_frontend *fe,
						u16 *strength)
{
	struct cinergyt2_fe_state *state = fe->demodulator_priv;
	struct dvbt_get_status_msg status;
	char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
	int ret;

	ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
				sizeof(status), 0);
	if (ret < 0) {
		err("cinergyt2_fe_read_signal_strength() Failed!"
			" (Error=%d)\n", ret);
		return ret;
	}
	*strength = (0xffff - le16_to_cpu(status.gain));
	return 0;
}

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tomi orava tomi orava 105 100.00% 1 100.00%
Total 105 100.00% 1 100.00%



static int cinergyt2_fe_read_snr(struct dvb_frontend *fe, u16 *snr)
{
	struct cinergyt2_fe_state *state = fe->demodulator_priv;
	struct dvbt_get_status_msg status;
	char cmd[] = { CINERGYT2_EP1_GET_TUNER_STATUS };
	int ret;

	ret = dvb_usb_generic_rw(state->d, cmd, sizeof(cmd), (char *)&status,
				sizeof(status), 0);
	if (ret < 0) {
		err("cinergyt2_fe_read_snr() Failed! (Error=%d)\n", ret);
		return ret;
	}
	*snr = (status.snr << 8) | status.snr;
	return 0;
}

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tomi orava tomi orava 105 100.00% 1 100.00%
Total 105 100.00% 1 100.00%



static int cinergyt2_fe_init(struct dvb_frontend *fe)
{
	return 0;
}

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Total 14 100.00% 1 100.00%



static int cinergyt2_fe_sleep(struct dvb_frontend *fe)
{
	deb_info("cinergyt2_fe_sleep() Called\n");
	return 0;
}

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tomi orava tomi orava 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%



static int cinergyt2_fe_get_tune_settings(struct dvb_frontend *fe,
				struct dvb_frontend_tune_settings *tune)
{
	tune->min_delay_ms = 800;
	return 0;
}

Contributors
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tomi orava tomi orava 25 100.00% 1 100.00%
Total 25 100.00% 1 100.00%



static int cinergyt2_fe_set_frontend(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
	struct cinergyt2_fe_state *state = fe->demodulator_priv;
	struct dvbt_set_parameters_msg param;
	char result[2];
	int err;

	param.cmd = CINERGYT2_EP1_SET_TUNER_PARAMETERS;
	param.tps = cpu_to_le16(compute_tps(fep));
	param.freq = cpu_to_le32(fep->frequency / 1000);
	param.flags = 0;

	switch (fep->bandwidth_hz) {
	default:
	case 8000000:
		param.bandwidth = 8;
		break;
	case 7000000:
		param.bandwidth = 7;
		break;
	case 6000000:
		param.bandwidth = 6;
		break;
	}

	err = dvb_usb_generic_rw(state->d,
			(char *)&param, sizeof(param),
			result, sizeof(result), 0);
	if (err < 0)
		err("cinergyt2_fe_set_frontend() Failed! err=%d\n", err);

	return (err < 0) ? err : 0;
}

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tomi orava tomi orava 128 73.99% 1 25.00%
mauro carvalho chehab mauro carvalho chehab 41 23.70% 2 50.00%
eberhard mattes eberhard mattes 4 2.31% 1 25.00%
Total 173 100.00% 4 100.00%



static void cinergyt2_fe_release(struct dvb_frontend *fe)
{
	struct cinergyt2_fe_state *state = fe->demodulator_priv;
	kfree(state);
}

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tomi orava tomi orava 25 100.00% 1 100.00%
Total 25 100.00% 1 100.00%


static struct dvb_frontend_ops cinergyt2_fe_ops;



struct dvb_frontend *cinergyt2_fe_attach(struct dvb_usb_device *d)
{
	struct cinergyt2_fe_state *s = kzalloc(sizeof(
					struct cinergyt2_fe_state), GFP_KERNEL);
	if (s == NULL)
		return NULL;

	s->d = d;
	memcpy(&s->fe.ops, &cinergyt2_fe_ops, sizeof(struct dvb_frontend_ops));
	s->fe.demodulator_priv = s;
	return &s->fe;
}


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Total 76 100.00% 1 100.00%


static struct dvb_frontend_ops cinergyt2_fe_ops = {
	.delsys = { SYS_DVBT },
	.info = {
		.name			= DRIVER_NAME,
		.frequency_min		= 174000000,
		.frequency_max		= 862000000,
		.frequency_stepsize	= 166667,
		.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_HIERARCHY_AUTO
			| FE_CAN_RECOVER
			| FE_CAN_MUTE_TS
	},

	.release		= cinergyt2_fe_release,

	.init			= cinergyt2_fe_init,
	.sleep			= cinergyt2_fe_sleep,

	.set_frontend		= cinergyt2_fe_set_frontend,
	.get_tune_settings	= cinergyt2_fe_get_tune_settings,

	.read_status		= cinergyt2_fe_read_status,
	.read_ber		= cinergyt2_fe_read_ber,
	.read_signal_strength	= cinergyt2_fe_read_signal_strength,
	.read_snr		= cinergyt2_fe_read_snr,
	.read_ucblocks		= cinergyt2_fe_read_unc_blocks,
};
Overall Contributors
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tomi orava tomi orava 1337 95.77% 1 20.00%
mauro carvalho chehab mauro carvalho chehab 55 3.94% 3 60.00%
eberhard mattes eberhard mattes 4 0.29% 1 20.00%
Total 1396 100.00% 5 100.00%
  Directory: drivers/media/usb/dvb-usb

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
tomi orava	tomi orava	309	98.72%	1	50.00%
mauro carvalho chehab	mauro carvalho chehab	4	1.28%	1	50.00%
	Total	313	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/media/usb/dvb-usb/cinergyT2-fe.c

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