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 /* Write register table */
cxd2820r_wr_reg_val_mask_tab(struct cxd2820r_priv * priv,const struct reg_val_mask * tab,int tab_len)12 int cxd2820r_wr_reg_val_mask_tab(struct cxd2820r_priv *priv,
13 				 const struct reg_val_mask *tab, int tab_len)
14 {
15 	struct i2c_client *client = priv->client[0];
16 	int ret;
17 	unsigned int i, reg, mask, val;
18 	struct regmap *regmap;
19 
20 	dev_dbg(&client->dev, "tab_len=%d\n", tab_len);
21 
22 	for (i = 0; i < tab_len; i++) {
23 		if ((tab[i].reg >> 16) & 0x1)
24 			regmap = priv->regmap[1];
25 		else
26 			regmap = priv->regmap[0];
27 
28 		reg = (tab[i].reg >> 0) & 0xffff;
29 		val = tab[i].val;
30 		mask = tab[i].mask;
31 
32 		if (mask == 0xff)
33 			ret = regmap_write(regmap, reg, val);
34 		else
35 			ret = regmap_write_bits(regmap, reg, mask, val);
36 		if (ret)
37 			goto error;
38 	}
39 
40 	return 0;
41 error:
42 	dev_dbg(&client->dev, "failed=%d\n", ret);
43 	return ret;
44 }
45 
cxd2820r_gpio(struct dvb_frontend * fe,u8 * gpio)46 int cxd2820r_gpio(struct dvb_frontend *fe, u8 *gpio)
47 {
48 	struct cxd2820r_priv *priv = fe->demodulator_priv;
49 	struct i2c_client *client = priv->client[0];
50 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
51 	int ret, i;
52 	u8 tmp0, tmp1;
53 
54 	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
55 
56 	/* update GPIOs only when needed */
57 	if (!memcmp(gpio, priv->gpio, sizeof(priv->gpio)))
58 		return 0;
59 
60 	tmp0 = 0x00;
61 	tmp1 = 0x00;
62 	for (i = 0; i < sizeof(priv->gpio); i++) {
63 		/* enable / disable */
64 		if (gpio[i] & CXD2820R_GPIO_E)
65 			tmp0 |= (2 << 6) >> (2 * i);
66 		else
67 			tmp0 |= (1 << 6) >> (2 * i);
68 
69 		/* input / output */
70 		if (gpio[i] & CXD2820R_GPIO_I)
71 			tmp1 |= (1 << (3 + i));
72 		else
73 			tmp1 |= (0 << (3 + i));
74 
75 		/* high / low */
76 		if (gpio[i] & CXD2820R_GPIO_H)
77 			tmp1 |= (1 << (0 + i));
78 		else
79 			tmp1 |= (0 << (0 + i));
80 
81 		dev_dbg(&client->dev, "gpio i=%d %02x %02x\n", i, tmp0, tmp1);
82 	}
83 
84 	dev_dbg(&client->dev, "wr gpio=%02x %02x\n", tmp0, tmp1);
85 
86 	/* write bits [7:2] */
87 	ret = regmap_update_bits(priv->regmap[0], 0x0089, 0xfc, tmp0);
88 	if (ret)
89 		goto error;
90 
91 	/* write bits [5:0] */
92 	ret = regmap_update_bits(priv->regmap[0], 0x008e, 0x3f, tmp1);
93 	if (ret)
94 		goto error;
95 
96 	memcpy(priv->gpio, gpio, sizeof(priv->gpio));
97 
98 	return ret;
99 error:
100 	dev_dbg(&client->dev, "failed=%d\n", ret);
101 	return ret;
102 }
103 
cxd2820r_set_frontend(struct dvb_frontend * fe)104 static int cxd2820r_set_frontend(struct dvb_frontend *fe)
105 {
106 	struct cxd2820r_priv *priv = fe->demodulator_priv;
107 	struct i2c_client *client = priv->client[0];
108 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
109 	int ret;
110 
111 	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
112 
113 	switch (c->delivery_system) {
114 	case SYS_DVBT:
115 		ret = cxd2820r_init_t(fe);
116 		if (ret < 0)
117 			goto err;
118 		ret = cxd2820r_set_frontend_t(fe);
119 		if (ret < 0)
120 			goto err;
121 		break;
122 	case SYS_DVBT2:
123 		ret = cxd2820r_init_t(fe);
124 		if (ret < 0)
125 			goto err;
126 		ret = cxd2820r_set_frontend_t2(fe);
127 		if (ret < 0)
128 			goto err;
129 		break;
130 	case SYS_DVBC_ANNEX_A:
131 		ret = cxd2820r_init_c(fe);
132 		if (ret < 0)
133 			goto err;
134 		ret = cxd2820r_set_frontend_c(fe);
135 		if (ret < 0)
136 			goto err;
137 		break;
138 	default:
139 		dev_dbg(&client->dev, "invalid delivery_system\n");
140 		ret = -EINVAL;
141 		break;
142 	}
143 err:
144 	return ret;
145 }
146 
cxd2820r_read_status(struct dvb_frontend * fe,enum fe_status * status)147 static int cxd2820r_read_status(struct dvb_frontend *fe, enum fe_status *status)
148 {
149 	struct cxd2820r_priv *priv = fe->demodulator_priv;
150 	struct i2c_client *client = priv->client[0];
151 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
152 	int ret;
153 
154 	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
155 
156 	switch (c->delivery_system) {
157 	case SYS_DVBT:
158 		ret = cxd2820r_read_status_t(fe, status);
159 		break;
160 	case SYS_DVBT2:
161 		ret = cxd2820r_read_status_t2(fe, status);
162 		break;
163 	case SYS_DVBC_ANNEX_A:
164 		ret = cxd2820r_read_status_c(fe, status);
165 		break;
166 	default:
167 		ret = -EINVAL;
168 		break;
169 	}
170 	return ret;
171 }
172 
cxd2820r_get_frontend(struct dvb_frontend * fe,struct dtv_frontend_properties * p)173 static int cxd2820r_get_frontend(struct dvb_frontend *fe,
174 				 struct dtv_frontend_properties *p)
175 {
176 	struct cxd2820r_priv *priv = fe->demodulator_priv;
177 	struct i2c_client *client = priv->client[0];
178 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
179 	int ret;
180 
181 	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
182 
183 	if (priv->delivery_system == SYS_UNDEFINED)
184 		return 0;
185 
186 	switch (c->delivery_system) {
187 	case SYS_DVBT:
188 		ret = cxd2820r_get_frontend_t(fe, p);
189 		break;
190 	case SYS_DVBT2:
191 		ret = cxd2820r_get_frontend_t2(fe, p);
192 		break;
193 	case SYS_DVBC_ANNEX_A:
194 		ret = cxd2820r_get_frontend_c(fe, p);
195 		break;
196 	default:
197 		ret = -EINVAL;
198 		break;
199 	}
200 	return ret;
201 }
202 
cxd2820r_read_ber(struct dvb_frontend * fe,u32 * ber)203 static int cxd2820r_read_ber(struct dvb_frontend *fe, u32 *ber)
204 {
205 	struct cxd2820r_priv *priv = fe->demodulator_priv;
206 	struct i2c_client *client = priv->client[0];
207 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
208 
209 	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
210 
211 	*ber = (priv->post_bit_error - priv->post_bit_error_prev_dvbv3);
212 	priv->post_bit_error_prev_dvbv3 = priv->post_bit_error;
213 
214 	return 0;
215 }
216 
cxd2820r_read_signal_strength(struct dvb_frontend * fe,u16 * strength)217 static int cxd2820r_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
218 {
219 	struct cxd2820r_priv *priv = fe->demodulator_priv;
220 	struct i2c_client *client = priv->client[0];
221 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
222 
223 	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
224 
225 	if (c->strength.stat[0].scale == FE_SCALE_RELATIVE)
226 		*strength = c->strength.stat[0].uvalue;
227 	else
228 		*strength = 0;
229 
230 	return 0;
231 }
232 
cxd2820r_read_snr(struct dvb_frontend * fe,u16 * snr)233 static int cxd2820r_read_snr(struct dvb_frontend *fe, u16 *snr)
234 {
235 	struct cxd2820r_priv *priv = fe->demodulator_priv;
236 	struct i2c_client *client = priv->client[0];
237 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
238 
239 	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
240 
241 	if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL)
242 		*snr = div_s64(c->cnr.stat[0].svalue, 100);
243 	else
244 		*snr = 0;
245 
246 	return 0;
247 }
248 
cxd2820r_read_ucblocks(struct dvb_frontend * fe,u32 * ucblocks)249 static int cxd2820r_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
250 {
251 	struct cxd2820r_priv *priv = fe->demodulator_priv;
252 	struct i2c_client *client = priv->client[0];
253 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
254 
255 	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
256 
257 	*ucblocks = 0;
258 
259 	return 0;
260 }
261 
cxd2820r_init(struct dvb_frontend * fe)262 static int cxd2820r_init(struct dvb_frontend *fe)
263 {
264 	return 0;
265 }
266 
cxd2820r_sleep(struct dvb_frontend * fe)267 static int cxd2820r_sleep(struct dvb_frontend *fe)
268 {
269 	struct cxd2820r_priv *priv = fe->demodulator_priv;
270 	struct i2c_client *client = priv->client[0];
271 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
272 	int ret;
273 
274 	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
275 
276 	switch (c->delivery_system) {
277 	case SYS_DVBT:
278 		ret = cxd2820r_sleep_t(fe);
279 		break;
280 	case SYS_DVBT2:
281 		ret = cxd2820r_sleep_t2(fe);
282 		break;
283 	case SYS_DVBC_ANNEX_A:
284 		ret = cxd2820r_sleep_c(fe);
285 		break;
286 	default:
287 		ret = -EINVAL;
288 		break;
289 	}
290 	return ret;
291 }
292 
cxd2820r_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * s)293 static int cxd2820r_get_tune_settings(struct dvb_frontend *fe,
294 				      struct dvb_frontend_tune_settings *s)
295 {
296 	struct cxd2820r_priv *priv = fe->demodulator_priv;
297 	struct i2c_client *client = priv->client[0];
298 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
299 	int ret;
300 
301 	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
302 
303 	switch (c->delivery_system) {
304 	case SYS_DVBT:
305 		ret = cxd2820r_get_tune_settings_t(fe, s);
306 		break;
307 	case SYS_DVBT2:
308 		ret = cxd2820r_get_tune_settings_t2(fe, s);
309 		break;
310 	case SYS_DVBC_ANNEX_A:
311 		ret = cxd2820r_get_tune_settings_c(fe, s);
312 		break;
313 	default:
314 		ret = -EINVAL;
315 		break;
316 	}
317 	return ret;
318 }
319 
cxd2820r_search(struct dvb_frontend * fe)320 static enum dvbfe_search cxd2820r_search(struct dvb_frontend *fe)
321 {
322 	struct cxd2820r_priv *priv = fe->demodulator_priv;
323 	struct i2c_client *client = priv->client[0];
324 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
325 	int ret, i;
326 	enum fe_status status = 0;
327 
328 	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
329 
330 	/* switch between DVB-T and DVB-T2 when tune fails */
331 	if (priv->last_tune_failed) {
332 		if (priv->delivery_system == SYS_DVBT) {
333 			ret = cxd2820r_sleep_t(fe);
334 			if (ret)
335 				goto error;
336 
337 			c->delivery_system = SYS_DVBT2;
338 		} else if (priv->delivery_system == SYS_DVBT2) {
339 			ret = cxd2820r_sleep_t2(fe);
340 			if (ret)
341 				goto error;
342 
343 			c->delivery_system = SYS_DVBT;
344 		}
345 	}
346 
347 	/* set frontend */
348 	ret = cxd2820r_set_frontend(fe);
349 	if (ret)
350 		goto error;
351 
352 	/* frontend lock wait loop count */
353 	switch (priv->delivery_system) {
354 	case SYS_DVBT:
355 	case SYS_DVBC_ANNEX_A:
356 		i = 20;
357 		break;
358 	case SYS_DVBT2:
359 		i = 40;
360 		break;
361 	case SYS_UNDEFINED:
362 	default:
363 		i = 0;
364 		break;
365 	}
366 
367 	/* wait frontend lock */
368 	for (; i > 0; i--) {
369 		dev_dbg(&client->dev, "loop=%d\n", i);
370 		msleep(50);
371 		ret = cxd2820r_read_status(fe, &status);
372 		if (ret)
373 			goto error;
374 
375 		if (status & FE_HAS_LOCK)
376 			break;
377 	}
378 
379 	/* check if we have a valid signal */
380 	if (status & FE_HAS_LOCK) {
381 		priv->last_tune_failed = false;
382 		return DVBFE_ALGO_SEARCH_SUCCESS;
383 	} else {
384 		priv->last_tune_failed = true;
385 		return DVBFE_ALGO_SEARCH_AGAIN;
386 	}
387 
388 error:
389 	dev_dbg(&client->dev, "failed=%d\n", ret);
390 	return DVBFE_ALGO_SEARCH_ERROR;
391 }
392 
cxd2820r_get_frontend_algo(struct dvb_frontend * fe)393 static enum dvbfe_algo cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
394 {
395 	return DVBFE_ALGO_CUSTOM;
396 }
397 
cxd2820r_release(struct dvb_frontend * fe)398 static void cxd2820r_release(struct dvb_frontend *fe)
399 {
400 	struct cxd2820r_priv *priv = fe->demodulator_priv;
401 	struct i2c_client *client = priv->client[0];
402 
403 	dev_dbg(&client->dev, "\n");
404 
405 	i2c_unregister_device(client);
406 
407 	return;
408 }
409 
cxd2820r_i2c_gate_ctrl(struct dvb_frontend * fe,int enable)410 static int cxd2820r_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
411 {
412 	struct cxd2820r_priv *priv = fe->demodulator_priv;
413 	struct i2c_client *client = priv->client[0];
414 
415 	dev_dbg_ratelimited(&client->dev, "enable=%d\n", enable);
416 
417 	return regmap_update_bits(priv->regmap[0], 0x00db, 0x01, enable ? 1 : 0);
418 }
419 
420 #ifdef CONFIG_GPIOLIB
cxd2820r_gpio_direction_output(struct gpio_chip * chip,unsigned nr,int val)421 static int cxd2820r_gpio_direction_output(struct gpio_chip *chip, unsigned nr,
422 		int val)
423 {
424 	struct cxd2820r_priv *priv = gpiochip_get_data(chip);
425 	struct i2c_client *client = priv->client[0];
426 	u8 gpio[GPIO_COUNT];
427 
428 	dev_dbg(&client->dev, "nr=%u val=%d\n", nr, val);
429 
430 	memcpy(gpio, priv->gpio, sizeof(gpio));
431 	gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
432 
433 	return cxd2820r_gpio(&priv->fe, gpio);
434 }
435 
cxd2820r_gpio_set(struct gpio_chip * chip,unsigned nr,int val)436 static void cxd2820r_gpio_set(struct gpio_chip *chip, unsigned nr, int val)
437 {
438 	struct cxd2820r_priv *priv = gpiochip_get_data(chip);
439 	struct i2c_client *client = priv->client[0];
440 	u8 gpio[GPIO_COUNT];
441 
442 	dev_dbg(&client->dev, "nr=%u val=%d\n", nr, val);
443 
444 	memcpy(gpio, priv->gpio, sizeof(gpio));
445 	gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
446 
447 	(void) cxd2820r_gpio(&priv->fe, gpio);
448 
449 	return;
450 }
451 
cxd2820r_gpio_get(struct gpio_chip * chip,unsigned nr)452 static int cxd2820r_gpio_get(struct gpio_chip *chip, unsigned nr)
453 {
454 	struct cxd2820r_priv *priv = gpiochip_get_data(chip);
455 	struct i2c_client *client = priv->client[0];
456 
457 	dev_dbg(&client->dev, "nr=%u\n", nr);
458 
459 	return (priv->gpio[nr] >> 2) & 0x01;
460 }
461 #endif
462 
463 static const struct dvb_frontend_ops cxd2820r_ops = {
464 	.delsys = { SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A },
465 	/* default: DVB-T/T2 */
466 	.info = {
467 		.name = "Sony CXD2820R",
468 
469 		.caps =	FE_CAN_FEC_1_2			|
470 			FE_CAN_FEC_2_3			|
471 			FE_CAN_FEC_3_4			|
472 			FE_CAN_FEC_5_6			|
473 			FE_CAN_FEC_7_8			|
474 			FE_CAN_FEC_AUTO			|
475 			FE_CAN_QPSK			|
476 			FE_CAN_QAM_16			|
477 			FE_CAN_QAM_32			|
478 			FE_CAN_QAM_64			|
479 			FE_CAN_QAM_128			|
480 			FE_CAN_QAM_256			|
481 			FE_CAN_QAM_AUTO			|
482 			FE_CAN_TRANSMISSION_MODE_AUTO	|
483 			FE_CAN_GUARD_INTERVAL_AUTO	|
484 			FE_CAN_HIERARCHY_AUTO		|
485 			FE_CAN_MUTE_TS			|
486 			FE_CAN_2G_MODULATION		|
487 			FE_CAN_MULTISTREAM
488 		},
489 
490 	.release		= cxd2820r_release,
491 	.init			= cxd2820r_init,
492 	.sleep			= cxd2820r_sleep,
493 
494 	.get_tune_settings	= cxd2820r_get_tune_settings,
495 	.i2c_gate_ctrl		= cxd2820r_i2c_gate_ctrl,
496 
497 	.get_frontend		= cxd2820r_get_frontend,
498 
499 	.get_frontend_algo	= cxd2820r_get_frontend_algo,
500 	.search			= cxd2820r_search,
501 
502 	.read_status		= cxd2820r_read_status,
503 	.read_snr		= cxd2820r_read_snr,
504 	.read_ber		= cxd2820r_read_ber,
505 	.read_ucblocks		= cxd2820r_read_ucblocks,
506 	.read_signal_strength	= cxd2820r_read_signal_strength,
507 };
508 
509 /*
510  * XXX: That is wrapper to cxd2820r_probe() via driver core in order to provide
511  * proper I2C client for legacy media attach binding.
512  * New users must use I2C client binding directly!
513  */
cxd2820r_attach(const struct cxd2820r_config * config,struct i2c_adapter * adapter,int * gpio_chip_base)514 struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *config,
515 				     struct i2c_adapter *adapter,
516 				     int *gpio_chip_base)
517 {
518 	struct i2c_client *client;
519 	struct i2c_board_info board_info;
520 	struct cxd2820r_platform_data pdata;
521 
522 	pdata.ts_mode = config->ts_mode;
523 	pdata.ts_clk_inv = config->ts_clock_inv;
524 	pdata.if_agc_polarity = config->if_agc_polarity;
525 	pdata.spec_inv = config->spec_inv;
526 	pdata.gpio_chip_base = &gpio_chip_base;
527 	pdata.attach_in_use = true;
528 
529 	memset(&board_info, 0, sizeof(board_info));
530 	strscpy(board_info.type, "cxd2820r", I2C_NAME_SIZE);
531 	board_info.addr = config->i2c_address;
532 	board_info.platform_data = &pdata;
533 	client = i2c_new_client_device(adapter, &board_info);
534 	if (!i2c_client_has_driver(client))
535 		return NULL;
536 
537 	return pdata.get_dvb_frontend(client);
538 }
539 EXPORT_SYMBOL_GPL(cxd2820r_attach);
540 
cxd2820r_get_dvb_frontend(struct i2c_client * client)541 static struct dvb_frontend *cxd2820r_get_dvb_frontend(struct i2c_client *client)
542 {
543 	struct cxd2820r_priv *priv = i2c_get_clientdata(client);
544 
545 	dev_dbg(&client->dev, "\n");
546 
547 	return &priv->fe;
548 }
549 
cxd2820r_probe(struct i2c_client * client)550 static int cxd2820r_probe(struct i2c_client *client)
551 {
552 	struct cxd2820r_platform_data *pdata = client->dev.platform_data;
553 	struct cxd2820r_priv *priv;
554 	int ret, *gpio_chip_base;
555 	unsigned int utmp;
556 	static const struct regmap_range_cfg regmap_range_cfg0[] = {
557 		{
558 			.range_min        = 0x0000,
559 			.range_max        = 0x3fff,
560 			.selector_reg     = 0x00,
561 			.selector_mask    = 0xff,
562 			.selector_shift   = 0,
563 			.window_start     = 0x00,
564 			.window_len       = 0x100,
565 		},
566 	};
567 	static const struct regmap_range_cfg regmap_range_cfg1[] = {
568 		{
569 			.range_min        = 0x0000,
570 			.range_max        = 0x01ff,
571 			.selector_reg     = 0x00,
572 			.selector_mask    = 0xff,
573 			.selector_shift   = 0,
574 			.window_start     = 0x00,
575 			.window_len       = 0x100,
576 		},
577 	};
578 	static const struct regmap_config regmap_config0 = {
579 		.reg_bits = 8,
580 		.val_bits = 8,
581 		.max_register = 0x3fff,
582 		.ranges = regmap_range_cfg0,
583 		.num_ranges = ARRAY_SIZE(regmap_range_cfg0),
584 		.cache_type = REGCACHE_NONE,
585 	};
586 	static const struct regmap_config regmap_config1 = {
587 		.reg_bits = 8,
588 		.val_bits = 8,
589 		.max_register = 0x01ff,
590 		.ranges = regmap_range_cfg1,
591 		.num_ranges = ARRAY_SIZE(regmap_range_cfg1),
592 		.cache_type = REGCACHE_NONE,
593 	};
594 
595 	dev_dbg(&client->dev, "\n");
596 
597 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
598 	if (!priv) {
599 		ret = -ENOMEM;
600 		goto err;
601 	}
602 
603 	priv->client[0] = client;
604 	priv->fe.demodulator_priv = priv;
605 	priv->i2c = client->adapter;
606 	priv->ts_mode = pdata->ts_mode;
607 	priv->ts_clk_inv = pdata->ts_clk_inv;
608 	priv->if_agc_polarity = pdata->if_agc_polarity;
609 	priv->spec_inv = pdata->spec_inv;
610 	gpio_chip_base = *pdata->gpio_chip_base;
611 	priv->regmap[0] = regmap_init_i2c(priv->client[0], &regmap_config0);
612 	if (IS_ERR(priv->regmap[0])) {
613 		ret = PTR_ERR(priv->regmap[0]);
614 		goto err_kfree;
615 	}
616 
617 	/* Check demod answers with correct chip id */
618 	ret = regmap_read(priv->regmap[0], 0x00fd, &utmp);
619 	if (ret)
620 		goto err_regmap_0_regmap_exit;
621 
622 	dev_dbg(&client->dev, "chip_id=%02x\n", utmp);
623 
624 	if (utmp != 0xe1) {
625 		ret = -ENODEV;
626 		goto err_regmap_0_regmap_exit;
627 	}
628 
629 	/*
630 	 * Chip has two I2C addresses for different register banks. We register
631 	 * one dummy I2C client in order to get own I2C client for each
632 	 * register bank.
633 	 */
634 	priv->client[1] = i2c_new_dummy_device(client->adapter, client->addr | (1 << 1));
635 	if (IS_ERR(priv->client[1])) {
636 		ret = PTR_ERR(priv->client[1]);
637 		dev_err(&client->dev, "I2C registration failed\n");
638 		goto err_regmap_0_regmap_exit;
639 	}
640 
641 	priv->regmap[1] = regmap_init_i2c(priv->client[1], &regmap_config1);
642 	if (IS_ERR(priv->regmap[1])) {
643 		ret = PTR_ERR(priv->regmap[1]);
644 		goto err_client_1_i2c_unregister_device;
645 	}
646 
647 	if (gpio_chip_base) {
648 #ifdef CONFIG_GPIOLIB
649 		/* Add GPIOs */
650 		priv->gpio_chip.label = KBUILD_MODNAME;
651 		priv->gpio_chip.parent = &client->dev;
652 		priv->gpio_chip.owner = THIS_MODULE;
653 		priv->gpio_chip.direction_output = cxd2820r_gpio_direction_output;
654 		priv->gpio_chip.set = cxd2820r_gpio_set;
655 		priv->gpio_chip.get = cxd2820r_gpio_get;
656 		priv->gpio_chip.base = -1; /* Dynamic allocation */
657 		priv->gpio_chip.ngpio = GPIO_COUNT;
658 		priv->gpio_chip.can_sleep = 1;
659 		ret = gpiochip_add_data(&priv->gpio_chip, priv);
660 		if (ret)
661 			goto err_regmap_1_regmap_exit;
662 
663 		dev_dbg(&client->dev, "gpio_chip.base=%d\n",
664 			priv->gpio_chip.base);
665 
666 		*gpio_chip_base = priv->gpio_chip.base;
667 #else
668 		/*
669 		 * Use static GPIO configuration if GPIOLIB is undefined.
670 		 * This is fallback condition.
671 		 */
672 		u8 gpio[GPIO_COUNT];
673 		gpio[0] = (*gpio_chip_base >> 0) & 0x07;
674 		gpio[1] = (*gpio_chip_base >> 3) & 0x07;
675 		gpio[2] = 0;
676 		ret = cxd2820r_gpio(&priv->fe, gpio);
677 		if (ret)
678 			goto err_regmap_1_regmap_exit;
679 #endif
680 	}
681 
682 	/* Create dvb frontend */
683 	memcpy(&priv->fe.ops, &cxd2820r_ops, sizeof(priv->fe.ops));
684 	if (!pdata->attach_in_use)
685 		priv->fe.ops.release = NULL;
686 	i2c_set_clientdata(client, priv);
687 
688 	/* Setup callbacks */
689 	pdata->get_dvb_frontend = cxd2820r_get_dvb_frontend;
690 
691 	dev_info(&client->dev, "Sony CXD2820R successfully identified\n");
692 
693 	return 0;
694 err_regmap_1_regmap_exit:
695 	regmap_exit(priv->regmap[1]);
696 err_client_1_i2c_unregister_device:
697 	i2c_unregister_device(priv->client[1]);
698 err_regmap_0_regmap_exit:
699 	regmap_exit(priv->regmap[0]);
700 err_kfree:
701 	kfree(priv);
702 err:
703 	dev_dbg(&client->dev, "failed=%d\n", ret);
704 	return ret;
705 }
706 
cxd2820r_remove(struct i2c_client * client)707 static void cxd2820r_remove(struct i2c_client *client)
708 {
709 	struct cxd2820r_priv *priv = i2c_get_clientdata(client);
710 
711 	dev_dbg(&client->dev, "\n");
712 
713 #ifdef CONFIG_GPIOLIB
714 	if (priv->gpio_chip.label)
715 		gpiochip_remove(&priv->gpio_chip);
716 #endif
717 	regmap_exit(priv->regmap[1]);
718 	i2c_unregister_device(priv->client[1]);
719 
720 	regmap_exit(priv->regmap[0]);
721 
722 	kfree(priv);
723 }
724 
725 static const struct i2c_device_id cxd2820r_id_table[] = {
726 	{"cxd2820r", 0},
727 	{}
728 };
729 MODULE_DEVICE_TABLE(i2c, cxd2820r_id_table);
730 
731 static struct i2c_driver cxd2820r_driver = {
732 	.driver = {
733 		.name                = "cxd2820r",
734 		.suppress_bind_attrs = true,
735 	},
736 	.probe    = cxd2820r_probe,
737 	.remove   = cxd2820r_remove,
738 	.id_table = cxd2820r_id_table,
739 };
740 
741 module_i2c_driver(cxd2820r_driver);
742 
743 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
744 MODULE_DESCRIPTION("Sony CXD2820R demodulator driver");
745 MODULE_LICENSE("GPL");
746