1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *  Driver for Zarlink DVB-T MT352 demodulator
5  *  Written by Holger Waechtler <holger@qanu.de>
6  *	 and Daniel Mack <daniel@qanu.de>
8  *  AVerMedia AVerTV DVB-T 771 support by
9  *       Wolfram Joost <dbox2@frokaschwei.de>
15  *  DVICO FusionHDTV DVB-T1 and DVICO FusionHDTV DVB-T Lite support by
46 	struct mt352_state* state = fe->demodulator_priv;  in mt352_single_write()
48 	struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0,  in mt352_single_write()
50 	int err = i2c_transfer(state->i2c, &msg, 1);  in mt352_single_write()
61 	for (i=0; i < ilen-1; i++)  in _mt352_write()
73 	struct i2c_msg msg [] = { { .addr = state->config.demod_address,  in mt352_read_register()
76 				  { .addr = state->config.demod_address,  in mt352_read_register()
80 	ret = i2c_transfer(state->i2c, msg, 2);  in mt352_read_register()
118 	if (state->config.adc_clock)  in mt352_calc_nominal_rate()
119 		adc_clock = state->config.adc_clock;  in mt352_calc_nominal_rate()
136 	if (state->config.adc_clock)  in mt352_calc_input_freq()
137 		adc_clock = state->config.adc_clock;  in mt352_calc_input_freq()
138 	if (state->config.if2)  in mt352_calc_input_freq()
139 		if2 = state->config.if2;  in mt352_calc_input_freq()
144 		ife = adc_clock - (if2 % adc_clock);  in mt352_calc_input_freq()
146 			ife = adc_clock - ife;  in mt352_calc_input_freq()
148 	value = -16374 * ife / adc_clock;  in mt352_calc_input_freq()
157 	struct dtv_frontend_properties *op = &fe->dtv_property_cache;  in mt352_set_parameters()
158 	struct mt352_state* state = fe->demodulator_priv;  in mt352_set_parameters()
164 	switch (op->code_rate_HP) {  in mt352_set_parameters()
181 			return -EINVAL;  in mt352_set_parameters()
184 	switch (op->code_rate_LP) {  in mt352_set_parameters()
201 			if (op->hierarchy == HIERARCHY_AUTO ||  in mt352_set_parameters()
202 			    op->hierarchy == HIERARCHY_NONE)  in mt352_set_parameters()
206 			return -EINVAL;  in mt352_set_parameters()
209 	switch (op->modulation) {  in mt352_set_parameters()
220 			return -EINVAL;  in mt352_set_parameters()
223 	switch (op->transmission_mode) {  in mt352_set_parameters()
231 			return -EINVAL;  in mt352_set_parameters()
234 	switch (op->guard_interval) {  in mt352_set_parameters()
248 			return -EINVAL;  in mt352_set_parameters()
251 	switch (op->hierarchy) {  in mt352_set_parameters()
265 			return -EINVAL;  in mt352_set_parameters()
277 	mt352_calc_nominal_rate(state, op->bandwidth_hz, buf+4);  in mt352_set_parameters()
280 	if (state->config.no_tuner) {  in mt352_set_parameters()
281 		if (fe->ops.tuner_ops.set_params) {  in mt352_set_parameters()
282 			fe->ops.tuner_ops.set_params(fe);  in mt352_set_parameters()
283 			if (fe->ops.i2c_gate_ctrl)  in mt352_set_parameters()
284 				fe->ops.i2c_gate_ctrl(fe, 0);  in mt352_set_parameters()
290 		if (fe->ops.tuner_ops.calc_regs) {  in mt352_set_parameters()
291 			fe->ops.tuner_ops.calc_regs(fe, buf+8, 5);  in mt352_set_parameters()
304 	struct mt352_state* state = fe->demodulator_priv;  in mt352_get_parameters()
321 		return -EINVAL;  in mt352_get_parameters()
323 	/* Use TPS_RECEIVED-registers, not the TPS_CURRENT-registers because  in mt352_get_parameters()
330 	op->code_rate_HP = tps_fec_to_api[(tps >> 7) & 7];  in mt352_get_parameters()
331 	op->code_rate_LP = tps_fec_to_api[(tps >> 4) & 7];  in mt352_get_parameters()
336 			op->modulation = QPSK;  in mt352_get_parameters()
339 			op->modulation = QAM_16;  in mt352_get_parameters()
342 			op->modulation = QAM_64;  in mt352_get_parameters()
345 			op->modulation = QAM_AUTO;  in mt352_get_parameters()
349 	op->transmission_mode = (tps & 0x01) ? TRANSMISSION_MODE_8K : TRANSMISSION_MODE_2K;  in mt352_get_parameters()
354 			op->guard_interval = GUARD_INTERVAL_1_32;  in mt352_get_parameters()
357 			op->guard_interval = GUARD_INTERVAL_1_16;  in mt352_get_parameters()
360 			op->guard_interval = GUARD_INTERVAL_1_8;  in mt352_get_parameters()
363 			op->guard_interval = GUARD_INTERVAL_1_4;  in mt352_get_parameters()
366 			op->guard_interval = GUARD_INTERVAL_AUTO;  in mt352_get_parameters()
373 			op->hierarchy = HIERARCHY_NONE;  in mt352_get_parameters()
376 			op->hierarchy = HIERARCHY_1;  in mt352_get_parameters()
379 			op->hierarchy = HIERARCHY_2;  in mt352_get_parameters()
382 			op->hierarchy = HIERARCHY_4;  in mt352_get_parameters()
385 			op->hierarchy = HIERARCHY_AUTO;  in mt352_get_parameters()
389 	op->frequency = (500 * (div - IF_FREQUENCYx6)) / 3 * 1000;  in mt352_get_parameters()
392 		op->bandwidth_hz = 8000000;  in mt352_get_parameters()
394 		op->bandwidth_hz = 7000000;  in mt352_get_parameters()
396 		op->bandwidth_hz = 6000000;  in mt352_get_parameters()
400 		op->inversion = INVERSION_OFF;  in mt352_get_parameters()
402 		op->inversion = INVERSION_ON;  in mt352_get_parameters()
409 	struct mt352_state* state = fe->demodulator_priv;  in mt352_read_status()
414 	 * The MT352 design manual from Zarlink states (page 46-47):  in mt352_read_status()
418 	 * If the Read_Tuner_Byte (bit-1) is activated, then the tuner status  in mt352_read_status()
420 	 * completion of the read operation is indicated by bit-5 of the  in mt352_read_status()
425 		return -EREMOTEIO;  in mt352_read_status()
427 		return -EREMOTEIO;  in mt352_read_status()
429 		return -EREMOTEIO;  in mt352_read_status()
452 	struct mt352_state* state = fe->demodulator_priv;  in mt352_read_ber()
463 	struct mt352_state* state = fe->demodulator_priv;  in mt352_read_signal_strength()
476 	struct mt352_state* state = fe->demodulator_priv;  in mt352_read_snr()
486 	struct mt352_state* state = fe->demodulator_priv;  in mt352_read_ucblocks()
496 	fe_tune_settings->min_delay_ms = 800;  in mt352_get_tune_settings()
497 	fe_tune_settings->step_size = 0;  in mt352_get_tune_settings()
498 	fe_tune_settings->max_drift = 0;  in mt352_get_tune_settings()
505 	struct mt352_state* state = fe->demodulator_priv;  in mt352_init()
516 		return state->config.demod_init(fe);  in mt352_init()
524 	struct mt352_state* state = fe->demodulator_priv;  in mt352_release()
540 	state->i2c = i2c;  in mt352_attach()
541 	memcpy(&state->config,config,sizeof(struct mt352_config));  in mt352_attach()
547 	memcpy(&state->frontend.ops, &mt352_ops, sizeof(struct dvb_frontend_ops));  in mt352_attach()
548 	state->frontend.demodulator_priv = state;  in mt352_attach()
549 	return &state->frontend;  in mt352_attach()
559 		.name			= "Zarlink MT352 DVB-T",
592 MODULE_DESCRIPTION("Zarlink MT352 DVB-T Demodulator driver");