1 // SPDX-License-Identifier: GPL-2.0-only
3  * Driver for Zarlink zl10036 DVB-S silicon tuner
6  * Copyright (C) 2007-2009 Matthias Schwarzott <zzam@gentoo.de>
10  *    http://www.mcmilk.de/projects/dvb-card/datasheets/ZL10036.pdf
12  * This one is working: (at my Avermedia DVB-S Pro)
13  * - zl10036 (40pin, FTA)
63 		{ .addr = state->config->tuner_address, .flags = I2C_M_RD,  in zl10036_read_status_reg()
67 	if (i2c_transfer(state->i2c, msg, 1) != 1) {  in zl10036_read_status_reg()
69 			__func__, state->config->tuner_address);  in zl10036_read_status_reg()
70 		return -EIO;  in zl10036_read_status_reg()
76 		deb_info("%s: Power-On-Reset bit enabled - need to initialize the tuner\n",  in zl10036_read_status_reg()
85 		{ .addr = state->config->tuner_address, .flags = 0,  in zl10036_write()
92 		/* every 8bit-value satisifes this!  in zl10036_write()
116 	ret = i2c_transfer(state->i2c, msg, 1);  in zl10036_write()
119 		return -EIO;  in zl10036_write()
127 	struct zl10036_state *state = fe->tuner_priv;  in zl10036_release()
129 	fe->tuner_priv = NULL;  in zl10036_release()
135 	struct zl10036_state *state = fe->tuner_priv;  in zl10036_sleep()
141 	if (fe->ops.i2c_gate_ctrl)  in zl10036_sleep()
142 		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */  in zl10036_sleep()
146 	if (fe->ops.i2c_gate_ctrl)  in zl10036_sleep()
147 		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */  in zl10036_sleep()
176 	state->frequency = div * _FR;  in zl10036_set_frequency()
178 	foffset = frequency - state->frequency;  in zl10036_set_frequency()
184 		frequency, state->frequency, foffset, div);  in zl10036_set_frequency()
203 	if (fbw > 35000)  in zl10036_set_bandwidth()
204 		fbw = 35000;  in zl10036_set_bandwidth()
229 	 * bf = fbw/_XTAL * br * k - 1 */  in zl10036_set_bandwidth()
231 	bf = (fbw * br * 1257) / (_XTAL * 1000) - 1;  in zl10036_set_bandwidth()
241 	if (br != state->br) {  in zl10036_set_bandwidth()
247 	if (bf != state->bf) {  in zl10036_set_bandwidth()
254 		 * maximum br is 63 -> max time = 2 /10 MHz = 2e-7 */  in zl10036_set_bandwidth()
263 	state->br = br;  in zl10036_set_bandwidth()
264 	state->bf = bf;  in zl10036_set_bandwidth()
284 	if (!state->config->rf_loop_enable)  in zl10036_set_gain_params()
296 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;  in zl10036_set_params()
297 	struct zl10036_state *state = fe->tuner_priv;  in zl10036_set_params()
299 	u32 frequency = p->frequency;  in zl10036_set_params()
306 	if ((frequency < fe->ops.info.frequency_min_hz / kHz)  in zl10036_set_params()
307 	||  (frequency > fe->ops.info.frequency_max_hz / kHz))  in zl10036_set_params()
308 		return -EINVAL;  in zl10036_set_params()
311 	 * alpha = 1.35 for dvb-s  in zl10036_set_params()
315 	fbw = (27 * p->symbol_rate) / 32;  in zl10036_set_params()
323 	/* setting the charge pump - guessed values */  in zl10036_set_params()
325 		return -EINVAL;  in zl10036_set_params()
333 		return -EINVAL;  in zl10036_set_params()
335 	if (fe->ops.i2c_gate_ctrl)  in zl10036_set_params()
336 		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */  in zl10036_set_params()
342 	ret = zl10036_set_frequency(state, p->frequency);  in zl10036_set_params()
350 	/* wait for tuner lock - no idea if this is really needed */  in zl10036_set_params()
364 	if (fe->ops.i2c_gate_ctrl)  in zl10036_set_params()
365 		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */  in zl10036_set_params()
372 	struct zl10036_state *state = fe->tuner_priv;  in zl10036_get_frequency()
374 	*frequency = state->frequency;  in zl10036_get_frequency()
386 		{ 0x04, 0x00 },		/*   2/3: div=0x400 - arbitrary value */  in zl10036_init_regs()
397 	state->br = 0xff;  in zl10036_init_regs()
398 	state->bf = 0xff;  in zl10036_init_regs()
400 	if (!state->config->rf_loop_enable)  in zl10036_init_regs()
416 	struct zl10036_state *state = fe->tuner_priv;  in zl10036_init()
419 	if (fe->ops.i2c_gate_ctrl)  in zl10036_init()
420 		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */  in zl10036_init()
426 	/* Only init if Power-on-Reset bit is set? */  in zl10036_init()
429 	if (fe->ops.i2c_gate_ctrl)  in zl10036_init()
430 		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */  in zl10036_init()
464 	state->config = config;  in zl10036_attach()
465 	state->i2c = i2c;  in zl10036_attach()
467 	if (fe->ops.i2c_gate_ctrl)  in zl10036_attach()
468 		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */  in zl10036_attach()
483 	if (fe->ops.i2c_gate_ctrl)  in zl10036_attach()
484 		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */  in zl10036_attach()
486 	fe->tuner_priv = state;  in zl10036_attach()
488 	memcpy(&fe->ops.tuner_ops, &zl10036_tuner_ops,  in zl10036_attach()
491 		__func__, fe->ops.tuner_ops.info.name, config->tuner_address);  in zl10036_attach()