1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Sony CXD2820R demodulator driver
4  *
5  * Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
6  */
7 
8 
9 #include "cxd2820r_priv.h"
10 
11 int cxd2820r_set_frontend_t2(struct dvb_frontend *fe)
12 {
13 	struct cxd2820r_priv *priv = fe->demodulator_priv;
14 	struct i2c_client *client = priv->client[0];
15 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
16 	int ret, bw_i;
17 	unsigned int utmp;
18 	u32 if_frequency;
19 	u8 buf[3], bw_param;
20 	u8 bw_params1[][5] = {
21 		{ 0x1c, 0xb3, 0x33, 0x33, 0x33 }, /* 5 MHz */
22 		{ 0x17, 0xea, 0xaa, 0xaa, 0xaa }, /* 6 MHz */
23 		{ 0x14, 0x80, 0x00, 0x00, 0x00 }, /* 7 MHz */
24 		{ 0x11, 0xf0, 0x00, 0x00, 0x00 }, /* 8 MHz */
25 	};
26 	struct reg_val_mask tab[] = {
27 		{ 0x00080, 0x02, 0xff },
28 		{ 0x00081, 0x20, 0xff },
29 		{ 0x00085, 0x07, 0xff },
30 		{ 0x00088, 0x01, 0xff },
31 		{ 0x02069, 0x01, 0xff },
32 
33 		{ 0x0207f, 0x2a, 0xff },
34 		{ 0x02082, 0x0a, 0xff },
35 		{ 0x02083, 0x0a, 0xff },
36 		{ 0x020cb, priv->if_agc_polarity << 6, 0x40 },
37 		{ 0x02070, priv->ts_mode, 0xff },
38 		{ 0x02071, !priv->ts_clk_inv << 6, 0x40 },
39 		{ 0x020b5, priv->spec_inv << 4, 0x10 },
40 		{ 0x02567, 0x07, 0x0f },
41 		{ 0x02569, 0x03, 0x03 },
42 		{ 0x02595, 0x1a, 0xff },
43 		{ 0x02596, 0x50, 0xff },
44 		{ 0x02a8c, 0x00, 0xff },
45 		{ 0x02a8d, 0x34, 0xff },
46 		{ 0x02a45, 0x06, 0x07 },
47 		{ 0x03f10, 0x0d, 0xff },
48 		{ 0x03f11, 0x02, 0xff },
49 		{ 0x03f12, 0x01, 0xff },
50 		{ 0x03f23, 0x2c, 0xff },
51 		{ 0x03f51, 0x13, 0xff },
52 		{ 0x03f52, 0x01, 0xff },
53 		{ 0x03f53, 0x00, 0xff },
54 		{ 0x027e6, 0x14, 0xff },
55 		{ 0x02786, 0x02, 0x07 },
56 		{ 0x02787, 0x40, 0xe0 },
57 		{ 0x027ef, 0x10, 0x18 },
58 	};
59 
60 	dev_dbg(&client->dev,
61 		"delivery_system=%d modulation=%d frequency=%u bandwidth_hz=%u inversion=%d stream_id=%u\n",
62 		c->delivery_system, c->modulation, c->frequency,
63 		c->bandwidth_hz, c->inversion, c->stream_id);
64 
65 	switch (c->bandwidth_hz) {
66 	case 5000000:
67 		bw_i = 0;
68 		bw_param = 3;
69 		break;
70 	case 6000000:
71 		bw_i = 1;
72 		bw_param = 2;
73 		break;
74 	case 7000000:
75 		bw_i = 2;
76 		bw_param = 1;
77 		break;
78 	case 8000000:
79 		bw_i = 3;
80 		bw_param = 0;
81 		break;
82 	default:
83 		return -EINVAL;
84 	}
85 
86 	/* program tuner */
87 	if (fe->ops.tuner_ops.set_params)
88 		fe->ops.tuner_ops.set_params(fe);
89 
90 	if (priv->delivery_system != SYS_DVBT2) {
91 		ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));
92 		if (ret)
93 			goto error;
94 	}
95 
96 	priv->delivery_system = SYS_DVBT2;
97 
98 	/* program IF frequency */
99 	if (fe->ops.tuner_ops.get_if_frequency) {
100 		ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
101 		if (ret)
102 			goto error;
103 		dev_dbg(&client->dev, "if_frequency=%u\n", if_frequency);
104 	} else {
105 		ret = -EINVAL;
106 		goto error;
107 	}
108 
109 	utmp = DIV_ROUND_CLOSEST_ULL((u64)if_frequency * 0x1000000, CXD2820R_CLK);
110 	buf[0] = (utmp >> 16) & 0xff;
111 	buf[1] = (utmp >>  8) & 0xff;
112 	buf[2] = (utmp >>  0) & 0xff;
113 	ret = regmap_bulk_write(priv->regmap[0], 0x20b6, buf, 3);
114 	if (ret)
115 		goto error;
116 
117 	/* PLP filtering */
118 	if (c->stream_id > 255) {
119 		dev_dbg(&client->dev, "disable PLP filtering\n");
120 		ret = regmap_write(priv->regmap[0], 0x23ad, 0x00);
121 		if (ret)
122 			goto error;
123 	} else {
124 		dev_dbg(&client->dev, "enable PLP filtering\n");
125 		ret = regmap_write(priv->regmap[0], 0x23af, c->stream_id & 0xff);
126 		if (ret)
127 			goto error;
128 		ret = regmap_write(priv->regmap[0], 0x23ad, 0x01);
129 		if (ret)
130 			goto error;
131 	}
132 
133 	ret = regmap_bulk_write(priv->regmap[0], 0x209f, bw_params1[bw_i], 5);
134 	if (ret)
135 		goto error;
136 
137 	ret = regmap_update_bits(priv->regmap[0], 0x20d7, 0xc0, bw_param << 6);
138 	if (ret)
139 		goto error;
140 
141 	ret = regmap_write(priv->regmap[0], 0x00ff, 0x08);
142 	if (ret)
143 		goto error;
144 
145 	ret = regmap_write(priv->regmap[0], 0x00fe, 0x01);
146 	if (ret)
147 		goto error;
148 
149 	return ret;
150 error:
151 	dev_dbg(&client->dev, "failed=%d\n", ret);
152 	return ret;
153 
154 }
155 
156 int cxd2820r_get_frontend_t2(struct dvb_frontend *fe,
157 			     struct dtv_frontend_properties *c)
158 {
159 	struct cxd2820r_priv *priv = fe->demodulator_priv;
160 	struct i2c_client *client = priv->client[0];
161 	int ret;
162 	unsigned int utmp;
163 	u8 buf[2];
164 
165 	dev_dbg(&client->dev, "\n");
166 
167 	ret = regmap_bulk_read(priv->regmap[0], 0x205c, buf, 2);
168 	if (ret)
169 		goto error;
170 
171 	switch ((buf[0] >> 0) & 0x07) {
172 	case 0:
173 		c->transmission_mode = TRANSMISSION_MODE_2K;
174 		break;
175 	case 1:
176 		c->transmission_mode = TRANSMISSION_MODE_8K;
177 		break;
178 	case 2:
179 		c->transmission_mode = TRANSMISSION_MODE_4K;
180 		break;
181 	case 3:
182 		c->transmission_mode = TRANSMISSION_MODE_1K;
183 		break;
184 	case 4:
185 		c->transmission_mode = TRANSMISSION_MODE_16K;
186 		break;
187 	case 5:
188 		c->transmission_mode = TRANSMISSION_MODE_32K;
189 		break;
190 	}
191 
192 	switch ((buf[1] >> 4) & 0x07) {
193 	case 0:
194 		c->guard_interval = GUARD_INTERVAL_1_32;
195 		break;
196 	case 1:
197 		c->guard_interval = GUARD_INTERVAL_1_16;
198 		break;
199 	case 2:
200 		c->guard_interval = GUARD_INTERVAL_1_8;
201 		break;
202 	case 3:
203 		c->guard_interval = GUARD_INTERVAL_1_4;
204 		break;
205 	case 4:
206 		c->guard_interval = GUARD_INTERVAL_1_128;
207 		break;
208 	case 5:
209 		c->guard_interval = GUARD_INTERVAL_19_128;
210 		break;
211 	case 6:
212 		c->guard_interval = GUARD_INTERVAL_19_256;
213 		break;
214 	}
215 
216 	ret = regmap_bulk_read(priv->regmap[0], 0x225b, buf, 2);
217 	if (ret)
218 		goto error;
219 
220 	switch ((buf[0] >> 0) & 0x07) {
221 	case 0:
222 		c->fec_inner = FEC_1_2;
223 		break;
224 	case 1:
225 		c->fec_inner = FEC_3_5;
226 		break;
227 	case 2:
228 		c->fec_inner = FEC_2_3;
229 		break;
230 	case 3:
231 		c->fec_inner = FEC_3_4;
232 		break;
233 	case 4:
234 		c->fec_inner = FEC_4_5;
235 		break;
236 	case 5:
237 		c->fec_inner = FEC_5_6;
238 		break;
239 	}
240 
241 	switch ((buf[1] >> 0) & 0x07) {
242 	case 0:
243 		c->modulation = QPSK;
244 		break;
245 	case 1:
246 		c->modulation = QAM_16;
247 		break;
248 	case 2:
249 		c->modulation = QAM_64;
250 		break;
251 	case 3:
252 		c->modulation = QAM_256;
253 		break;
254 	}
255 
256 	ret = regmap_read(priv->regmap[0], 0x20b5, &utmp);
257 	if (ret)
258 		goto error;
259 
260 	switch ((utmp >> 4) & 0x01) {
261 	case 0:
262 		c->inversion = INVERSION_OFF;
263 		break;
264 	case 1:
265 		c->inversion = INVERSION_ON;
266 		break;
267 	}
268 
269 	return ret;
270 error:
271 	dev_dbg(&client->dev, "failed=%d\n", ret);
272 	return ret;
273 }
274 
275 int cxd2820r_read_status_t2(struct dvb_frontend *fe, enum fe_status *status)
276 {
277 	struct cxd2820r_priv *priv = fe->demodulator_priv;
278 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
279 	struct i2c_client *client = priv->client[0];
280 	int ret;
281 	unsigned int utmp, utmp1, utmp2;
282 	u8 buf[4];
283 
284 	/* Lock detection */
285 	ret = regmap_bulk_read(priv->regmap[0], 0x2010, &buf[0], 1);
286 	if (ret)
287 		goto error;
288 
289 	utmp1 = (buf[0] >> 0) & 0x07;
290 	utmp2 = (buf[0] >> 5) & 0x01;
291 
292 	if (utmp1 == 6 && utmp2 == 1) {
293 		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
294 			  FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
295 	} else if (utmp1 == 6 || utmp2 == 1) {
296 		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
297 			  FE_HAS_VITERBI | FE_HAS_SYNC;
298 	} else {
299 		*status = 0;
300 	}
301 
302 	dev_dbg(&client->dev, "status=%02x raw=%*ph sync=%u ts=%u\n",
303 		*status, 1, buf, utmp1, utmp2);
304 
305 	/* Signal strength */
306 	if (*status & FE_HAS_SIGNAL) {
307 		unsigned int strength;
308 
309 		ret = regmap_bulk_read(priv->regmap[0], 0x2026, buf, 2);
310 		if (ret)
311 			goto error;
312 
313 		utmp = buf[0] << 8 | buf[1] << 0;
314 		utmp = ~utmp & 0x0fff;
315 		/* Scale value to 0x0000-0xffff */
316 		strength = utmp << 4 | utmp >> 8;
317 
318 		c->strength.len = 1;
319 		c->strength.stat[0].scale = FE_SCALE_RELATIVE;
320 		c->strength.stat[0].uvalue = strength;
321 	} else {
322 		c->strength.len = 1;
323 		c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
324 	}
325 
326 	/* CNR */
327 	if (*status & FE_HAS_VITERBI) {
328 		unsigned int cnr;
329 
330 		ret = regmap_bulk_read(priv->regmap[0], 0x2028, buf, 2);
331 		if (ret)
332 			goto error;
333 
334 		utmp = buf[0] << 8 | buf[1] << 0;
335 		utmp = utmp & 0x0fff;
336 		#define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
337 		if (utmp)
338 			cnr = div_u64((u64)(intlog10(utmp)
339 				      - CXD2820R_LOG10_8_24) * 10000,
340 				      (1 << 24));
341 		else
342 			cnr = 0;
343 
344 		c->cnr.len = 1;
345 		c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
346 		c->cnr.stat[0].svalue = cnr;
347 	} else {
348 		c->cnr.len = 1;
349 		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
350 	}
351 
352 	/* BER */
353 	if (*status & FE_HAS_SYNC) {
354 		unsigned int post_bit_error;
355 
356 		ret = regmap_bulk_read(priv->regmap[0], 0x2039, buf, 4);
357 		if (ret)
358 			goto error;
359 
360 		if ((buf[0] >> 4) & 0x01) {
361 			post_bit_error = buf[0] << 24 | buf[1] << 16 |
362 					 buf[2] << 8 | buf[3] << 0;
363 			post_bit_error &= 0x0fffffff;
364 		} else {
365 			post_bit_error = 0;
366 		}
367 
368 		priv->post_bit_error += post_bit_error;
369 
370 		c->post_bit_error.len = 1;
371 		c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
372 		c->post_bit_error.stat[0].uvalue = priv->post_bit_error;
373 	} else {
374 		c->post_bit_error.len = 1;
375 		c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
376 	}
377 
378 	return ret;
379 error:
380 	dev_dbg(&client->dev, "failed=%d\n", ret);
381 	return ret;
382 }
383 
384 int cxd2820r_sleep_t2(struct dvb_frontend *fe)
385 {
386 	struct cxd2820r_priv *priv = fe->demodulator_priv;
387 	struct i2c_client *client = priv->client[0];
388 	int ret;
389 	static const struct reg_val_mask tab[] = {
390 		{ 0x000ff, 0x1f, 0xff },
391 		{ 0x00085, 0x00, 0xff },
392 		{ 0x00088, 0x01, 0xff },
393 		{ 0x02069, 0x00, 0xff },
394 		{ 0x00081, 0x00, 0xff },
395 		{ 0x00080, 0x00, 0xff },
396 	};
397 
398 	dev_dbg(&client->dev, "\n");
399 
400 	ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));
401 	if (ret)
402 		goto error;
403 
404 	priv->delivery_system = SYS_UNDEFINED;
405 
406 	return ret;
407 error:
408 	dev_dbg(&client->dev, "failed=%d\n", ret);
409 	return ret;
410 }
411 
412 int cxd2820r_get_tune_settings_t2(struct dvb_frontend *fe,
413 	struct dvb_frontend_tune_settings *s)
414 {
415 	s->min_delay_ms = 1500;
416 	s->step_size = fe->ops.info.frequency_stepsize_hz * 2;
417 	s->max_drift = (fe->ops.info.frequency_stepsize_hz * 2) + 1;
418 
419 	return 0;
420 }
421