tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Sony CXD2820R demodulator driver
3 *
4 * Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21
22#include "cxd2820r_priv.h"
23
24/* write multiple registers */
25static int cxd2820r_wr_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
26 u8 *val, int len)
27{
28 int ret;
29 u8 buf[len+1];
30 struct i2c_msg msg[1] = {
31 {
32 .addr = i2c,
33 .flags = 0,
34 .len = sizeof(buf),
35 .buf = buf,
36 }
37 };
38
39 buf[0] = reg;
40 memcpy(&buf[1], val, len);
41
42 ret = i2c_transfer(priv->i2c, msg, 1);
43 if (ret == 1) {
44 ret = 0;
45 } else {
46 dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \
47 "len=%d\n", KBUILD_MODNAME, ret, reg, len);
48 ret = -EREMOTEIO;
49 }
50 return ret;
51}
52
53/* read multiple registers */
54static int cxd2820r_rd_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
55 u8 *val, int len)
56{
57 int ret;
58 u8 buf[len];
59 struct i2c_msg msg[2] = {
60 {
61 .addr = i2c,
62 .flags = 0,
63 .len = 1,
64 .buf = ®,
65 }, {
66 .addr = i2c,
67 .flags = I2C_M_RD,
68 .len = sizeof(buf),
69 .buf = buf,
70 }
71 };
72
73 ret = i2c_transfer(priv->i2c, msg, 2);
74 if (ret == 2) {
75 memcpy(val, buf, len);
76 ret = 0;
77 } else {
78 dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \
79 "len=%d\n", KBUILD_MODNAME, ret, reg, len);
80 ret = -EREMOTEIO;
81 }
82
83 return ret;
84}
85
86/* write multiple registers */
87int cxd2820r_wr_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
88 int len)
89{
90 int ret;
91 u8 i2c_addr;
92 u8 reg = (reginfo >> 0) & 0xff;
93 u8 bank = (reginfo >> 8) & 0xff;
94 u8 i2c = (reginfo >> 16) & 0x01;
95
96 /* select I2C */
97 if (i2c)
98 i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
99 else
100 i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
101
102 /* switch bank if needed */
103 if (bank != priv->bank[i2c]) {
104 ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1);
105 if (ret)
106 return ret;
107 priv->bank[i2c] = bank;
108 }
109 return cxd2820r_wr_regs_i2c(priv, i2c_addr, reg, val, len);
110}
111
112/* read multiple registers */
113int cxd2820r_rd_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
114 int len)
115{
116 int ret;
117 u8 i2c_addr;
118 u8 reg = (reginfo >> 0) & 0xff;
119 u8 bank = (reginfo >> 8) & 0xff;
120 u8 i2c = (reginfo >> 16) & 0x01;
121
122 /* select I2C */
123 if (i2c)
124 i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
125 else
126 i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
127
128 /* switch bank if needed */
129 if (bank != priv->bank[i2c]) {
130 ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1);
131 if (ret)
132 return ret;
133 priv->bank[i2c] = bank;
134 }
135 return cxd2820r_rd_regs_i2c(priv, i2c_addr, reg, val, len);
136}
137
138/* write single register */
139int cxd2820r_wr_reg(struct cxd2820r_priv *priv, u32 reg, u8 val)
140{
141 return cxd2820r_wr_regs(priv, reg, &val, 1);
142}
143
144/* read single register */
145int cxd2820r_rd_reg(struct cxd2820r_priv *priv, u32 reg, u8 *val)
146{
147 return cxd2820r_rd_regs(priv, reg, val, 1);
148}
149
150/* write single register with mask */
151int cxd2820r_wr_reg_mask(struct cxd2820r_priv *priv, u32 reg, u8 val,
152 u8 mask)
153{
154 int ret;
155 u8 tmp;
156
157 /* no need for read if whole reg is written */
158 if (mask != 0xff) {
159 ret = cxd2820r_rd_reg(priv, reg, &tmp);
160 if (ret)
161 return ret;
162
163 val &= mask;
164 tmp &= ~mask;
165 val |= tmp;
166 }
167
168 return cxd2820r_wr_reg(priv, reg, val);
169}
170
171int cxd2820r_gpio(struct dvb_frontend *fe, u8 *gpio)
172{
173 struct cxd2820r_priv *priv = fe->demodulator_priv;
174 int ret, i;
175 u8 tmp0, tmp1;
176
177 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
178 fe->dtv_property_cache.delivery_system);
179
180 /* update GPIOs only when needed */
181 if (!memcmp(gpio, priv->gpio, sizeof(priv->gpio)))
182 return 0;
183
184 tmp0 = 0x00;
185 tmp1 = 0x00;
186 for (i = 0; i < sizeof(priv->gpio); i++) {
187 /* enable / disable */
188 if (gpio[i] & CXD2820R_GPIO_E)
189 tmp0 |= (2 << 6) >> (2 * i);
190 else
191 tmp0 |= (1 << 6) >> (2 * i);
192
193 /* input / output */
194 if (gpio[i] & CXD2820R_GPIO_I)
195 tmp1 |= (1 << (3 + i));
196 else
197 tmp1 |= (0 << (3 + i));
198
199 /* high / low */
200 if (gpio[i] & CXD2820R_GPIO_H)
201 tmp1 |= (1 << (0 + i));
202 else
203 tmp1 |= (0 << (0 + i));
204
205 dev_dbg(&priv->i2c->dev, "%s: gpio i=%d %02x %02x\n", __func__,
206 i, tmp0, tmp1);
207 }
208
209 dev_dbg(&priv->i2c->dev, "%s: wr gpio=%02x %02x\n", __func__, tmp0,
210 tmp1);
211
212 /* write bits [7:2] */
213 ret = cxd2820r_wr_reg_mask(priv, 0x00089, tmp0, 0xfc);
214 if (ret)
215 goto error;
216
217 /* write bits [5:0] */
218 ret = cxd2820r_wr_reg_mask(priv, 0x0008e, tmp1, 0x3f);
219 if (ret)
220 goto error;
221
222 memcpy(priv->gpio, gpio, sizeof(priv->gpio));
223
224 return ret;
225error:
226 dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
227 return ret;
228}
229
230/* 64 bit div with round closest, like DIV_ROUND_CLOSEST but 64 bit */
231u32 cxd2820r_div_u64_round_closest(u64 dividend, u32 divisor)
232{
233 return div_u64(dividend + (divisor / 2), divisor);
234}
235
236static int cxd2820r_set_frontend(struct dvb_frontend *fe)
237{
238 struct cxd2820r_priv *priv = fe->demodulator_priv;
239 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
240 int ret;
241
242 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
243 fe->dtv_property_cache.delivery_system);
244
245 switch (c->delivery_system) {
246 case SYS_DVBT:
247 ret = cxd2820r_init_t(fe);
248 if (ret < 0)
249 goto err;
250 ret = cxd2820r_set_frontend_t(fe);
251 if (ret < 0)
252 goto err;
253 break;
254 case SYS_DVBT2:
255 ret = cxd2820r_init_t(fe);
256 if (ret < 0)
257 goto err;
258 ret = cxd2820r_set_frontend_t2(fe);
259 if (ret < 0)
260 goto err;
261 break;
262 case SYS_DVBC_ANNEX_A:
263 ret = cxd2820r_init_c(fe);
264 if (ret < 0)
265 goto err;
266 ret = cxd2820r_set_frontend_c(fe);
267 if (ret < 0)
268 goto err;
269 break;
270 default:
271 dev_dbg(&priv->i2c->dev, "%s: error state=%d\n", __func__,
272 fe->dtv_property_cache.delivery_system);
273 ret = -EINVAL;
274 break;
275 }
276err:
277 return ret;
278}
279static int cxd2820r_read_status(struct dvb_frontend *fe, fe_status_t *status)
280{
281 struct cxd2820r_priv *priv = fe->demodulator_priv;
282 int ret;
283
284 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
285 fe->dtv_property_cache.delivery_system);
286
287 switch (fe->dtv_property_cache.delivery_system) {
288 case SYS_DVBT:
289 ret = cxd2820r_read_status_t(fe, status);
290 break;
291 case SYS_DVBT2:
292 ret = cxd2820r_read_status_t2(fe, status);
293 break;
294 case SYS_DVBC_ANNEX_A:
295 ret = cxd2820r_read_status_c(fe, status);
296 break;
297 default:
298 ret = -EINVAL;
299 break;
300 }
301 return ret;
302}
303
304static int cxd2820r_get_frontend(struct dvb_frontend *fe)
305{
306 struct cxd2820r_priv *priv = fe->demodulator_priv;
307 int ret;
308
309 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
310 fe->dtv_property_cache.delivery_system);
311
312 if (priv->delivery_system == SYS_UNDEFINED)
313 return 0;
314
315 switch (fe->dtv_property_cache.delivery_system) {
316 case SYS_DVBT:
317 ret = cxd2820r_get_frontend_t(fe);
318 break;
319 case SYS_DVBT2:
320 ret = cxd2820r_get_frontend_t2(fe);
321 break;
322 case SYS_DVBC_ANNEX_A:
323 ret = cxd2820r_get_frontend_c(fe);
324 break;
325 default:
326 ret = -EINVAL;
327 break;
328 }
329 return ret;
330}
331
332static int cxd2820r_read_ber(struct dvb_frontend *fe, u32 *ber)
333{
334 struct cxd2820r_priv *priv = fe->demodulator_priv;
335 int ret;
336
337 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
338 fe->dtv_property_cache.delivery_system);
339
340 switch (fe->dtv_property_cache.delivery_system) {
341 case SYS_DVBT:
342 ret = cxd2820r_read_ber_t(fe, ber);
343 break;
344 case SYS_DVBT2:
345 ret = cxd2820r_read_ber_t2(fe, ber);
346 break;
347 case SYS_DVBC_ANNEX_A:
348 ret = cxd2820r_read_ber_c(fe, ber);
349 break;
350 default:
351 ret = -EINVAL;
352 break;
353 }
354 return ret;
355}
356
357static int cxd2820r_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
358{
359 struct cxd2820r_priv *priv = fe->demodulator_priv;
360 int ret;
361
362 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
363 fe->dtv_property_cache.delivery_system);
364
365 switch (fe->dtv_property_cache.delivery_system) {
366 case SYS_DVBT:
367 ret = cxd2820r_read_signal_strength_t(fe, strength);
368 break;
369 case SYS_DVBT2:
370 ret = cxd2820r_read_signal_strength_t2(fe, strength);
371 break;
372 case SYS_DVBC_ANNEX_A:
373 ret = cxd2820r_read_signal_strength_c(fe, strength);
374 break;
375 default:
376 ret = -EINVAL;
377 break;
378 }
379 return ret;
380}
381
382static int cxd2820r_read_snr(struct dvb_frontend *fe, u16 *snr)
383{
384 struct cxd2820r_priv *priv = fe->demodulator_priv;
385 int ret;
386
387 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
388 fe->dtv_property_cache.delivery_system);
389
390 switch (fe->dtv_property_cache.delivery_system) {
391 case SYS_DVBT:
392 ret = cxd2820r_read_snr_t(fe, snr);
393 break;
394 case SYS_DVBT2:
395 ret = cxd2820r_read_snr_t2(fe, snr);
396 break;
397 case SYS_DVBC_ANNEX_A:
398 ret = cxd2820r_read_snr_c(fe, snr);
399 break;
400 default:
401 ret = -EINVAL;
402 break;
403 }
404 return ret;
405}
406
407static int cxd2820r_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
408{
409 struct cxd2820r_priv *priv = fe->demodulator_priv;
410 int ret;
411
412 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
413 fe->dtv_property_cache.delivery_system);
414
415 switch (fe->dtv_property_cache.delivery_system) {
416 case SYS_DVBT:
417 ret = cxd2820r_read_ucblocks_t(fe, ucblocks);
418 break;
419 case SYS_DVBT2:
420 ret = cxd2820r_read_ucblocks_t2(fe, ucblocks);
421 break;
422 case SYS_DVBC_ANNEX_A:
423 ret = cxd2820r_read_ucblocks_c(fe, ucblocks);
424 break;
425 default:
426 ret = -EINVAL;
427 break;
428 }
429 return ret;
430}
431
432static int cxd2820r_init(struct dvb_frontend *fe)
433{
434 return 0;
435}
436
437static int cxd2820r_sleep(struct dvb_frontend *fe)
438{
439 struct cxd2820r_priv *priv = fe->demodulator_priv;
440 int ret;
441
442 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
443 fe->dtv_property_cache.delivery_system);
444
445 switch (fe->dtv_property_cache.delivery_system) {
446 case SYS_DVBT:
447 ret = cxd2820r_sleep_t(fe);
448 break;
449 case SYS_DVBT2:
450 ret = cxd2820r_sleep_t2(fe);
451 break;
452 case SYS_DVBC_ANNEX_A:
453 ret = cxd2820r_sleep_c(fe);
454 break;
455 default:
456 ret = -EINVAL;
457 break;
458 }
459 return ret;
460}
461
462static int cxd2820r_get_tune_settings(struct dvb_frontend *fe,
463 struct dvb_frontend_tune_settings *s)
464{
465 struct cxd2820r_priv *priv = fe->demodulator_priv;
466 int ret;
467
468 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
469 fe->dtv_property_cache.delivery_system);
470
471 switch (fe->dtv_property_cache.delivery_system) {
472 case SYS_DVBT:
473 ret = cxd2820r_get_tune_settings_t(fe, s);
474 break;
475 case SYS_DVBT2:
476 ret = cxd2820r_get_tune_settings_t2(fe, s);
477 break;
478 case SYS_DVBC_ANNEX_A:
479 ret = cxd2820r_get_tune_settings_c(fe, s);
480 break;
481 default:
482 ret = -EINVAL;
483 break;
484 }
485 return ret;
486}
487
488static enum dvbfe_search cxd2820r_search(struct dvb_frontend *fe)
489{
490 struct cxd2820r_priv *priv = fe->demodulator_priv;
491 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
492 int ret, i;
493 fe_status_t status = 0;
494
495 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
496 fe->dtv_property_cache.delivery_system);
497
498 /* switch between DVB-T and DVB-T2 when tune fails */
499 if (priv->last_tune_failed) {
500 if (priv->delivery_system == SYS_DVBT) {
501 ret = cxd2820r_sleep_t(fe);
502 if (ret)
503 goto error;
504
505 c->delivery_system = SYS_DVBT2;
506 } else if (priv->delivery_system == SYS_DVBT2) {
507 ret = cxd2820r_sleep_t2(fe);
508 if (ret)
509 goto error;
510
511 c->delivery_system = SYS_DVBT;
512 }
513 }
514
515 /* set frontend */
516 ret = cxd2820r_set_frontend(fe);
517 if (ret)
518 goto error;
519
520
521 /* frontend lock wait loop count */
522 switch (priv->delivery_system) {
523 case SYS_DVBT:
524 case SYS_DVBC_ANNEX_A:
525 i = 20;
526 break;
527 case SYS_DVBT2:
528 i = 40;
529 break;
530 case SYS_UNDEFINED:
531 default:
532 i = 0;
533 break;
534 }
535
536 /* wait frontend lock */
537 for (; i > 0; i--) {
538 dev_dbg(&priv->i2c->dev, "%s: loop=%d\n", __func__, i);
539 msleep(50);
540 ret = cxd2820r_read_status(fe, &status);
541 if (ret)
542 goto error;
543
544 if (status & FE_HAS_LOCK)
545 break;
546 }
547
548 /* check if we have a valid signal */
549 if (status & FE_HAS_LOCK) {
550 priv->last_tune_failed = 0;
551 return DVBFE_ALGO_SEARCH_SUCCESS;
552 } else {
553 priv->last_tune_failed = 1;
554 return DVBFE_ALGO_SEARCH_AGAIN;
555 }
556
557error:
558 dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
559 return DVBFE_ALGO_SEARCH_ERROR;
560}
561
562static int cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
563{
564 return DVBFE_ALGO_CUSTOM;
565}
566
567static void cxd2820r_release(struct dvb_frontend *fe)
568{
569 struct cxd2820r_priv *priv = fe->demodulator_priv;
570 int uninitialized_var(ret); /* silence compiler warning */
571
572 dev_dbg(&priv->i2c->dev, "%s\n", __func__);
573
574#ifdef CONFIG_GPIOLIB
575 /* remove GPIOs */
576 if (priv->gpio_chip.label) {
577 ret = gpiochip_remove(&priv->gpio_chip);
578 if (ret)
579 dev_err(&priv->i2c->dev, "%s: gpiochip_remove() " \
580 "failed=%d\n", KBUILD_MODNAME, ret);
581 }
582#endif
583 kfree(priv);
584 return;
585}
586
587static int cxd2820r_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
588{
589 struct cxd2820r_priv *priv = fe->demodulator_priv;
590
591 dev_dbg(&priv->i2c->dev, "%s: %d\n", __func__, enable);
592
593 /* Bit 0 of reg 0xdb in bank 0x00 controls I2C repeater */
594 return cxd2820r_wr_reg_mask(priv, 0xdb, enable ? 1 : 0, 0x1);
595}
596
597#ifdef CONFIG_GPIOLIB
598static int cxd2820r_gpio_direction_output(struct gpio_chip *chip, unsigned nr,
599 int val)
600{
601 struct cxd2820r_priv *priv =
602 container_of(chip, struct cxd2820r_priv, gpio_chip);
603 u8 gpio[GPIO_COUNT];
604
605 dev_dbg(&priv->i2c->dev, "%s: nr=%d val=%d\n", __func__, nr, val);
606
607 memcpy(gpio, priv->gpio, sizeof(gpio));
608 gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
609
610 return cxd2820r_gpio(&priv->fe, gpio);
611}
612
613static void cxd2820r_gpio_set(struct gpio_chip *chip, unsigned nr, int val)
614{
615 struct cxd2820r_priv *priv =
616 container_of(chip, struct cxd2820r_priv, gpio_chip);
617 u8 gpio[GPIO_COUNT];
618
619 dev_dbg(&priv->i2c->dev, "%s: nr=%d val=%d\n", __func__, nr, val);
620
621 memcpy(gpio, priv->gpio, sizeof(gpio));
622 gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
623
624 (void) cxd2820r_gpio(&priv->fe, gpio);
625
626 return;
627}
628
629static int cxd2820r_gpio_get(struct gpio_chip *chip, unsigned nr)
630{
631 struct cxd2820r_priv *priv =
632 container_of(chip, struct cxd2820r_priv, gpio_chip);
633
634 dev_dbg(&priv->i2c->dev, "%s: nr=%d\n", __func__, nr);
635
636 return (priv->gpio[nr] >> 2) & 0x01;
637}
638#endif
639
640static const struct dvb_frontend_ops cxd2820r_ops = {
641 .delsys = { SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A },
642 /* default: DVB-T/T2 */
643 .info = {
644 .name = "Sony CXD2820R",
645
646 .caps = FE_CAN_FEC_1_2 |
647 FE_CAN_FEC_2_3 |
648 FE_CAN_FEC_3_4 |
649 FE_CAN_FEC_5_6 |
650 FE_CAN_FEC_7_8 |
651 FE_CAN_FEC_AUTO |
652 FE_CAN_QPSK |
653 FE_CAN_QAM_16 |
654 FE_CAN_QAM_32 |
655 FE_CAN_QAM_64 |
656 FE_CAN_QAM_128 |
657 FE_CAN_QAM_256 |
658 FE_CAN_QAM_AUTO |
659 FE_CAN_TRANSMISSION_MODE_AUTO |
660 FE_CAN_GUARD_INTERVAL_AUTO |
661 FE_CAN_HIERARCHY_AUTO |
662 FE_CAN_MUTE_TS |
663 FE_CAN_2G_MODULATION
664 },
665
666 .release = cxd2820r_release,
667 .init = cxd2820r_init,
668 .sleep = cxd2820r_sleep,
669
670 .get_tune_settings = cxd2820r_get_tune_settings,
671 .i2c_gate_ctrl = cxd2820r_i2c_gate_ctrl,
672
673 .get_frontend = cxd2820r_get_frontend,
674
675 .get_frontend_algo = cxd2820r_get_frontend_algo,
676 .search = cxd2820r_search,
677
678 .read_status = cxd2820r_read_status,
679 .read_snr = cxd2820r_read_snr,
680 .read_ber = cxd2820r_read_ber,
681 .read_ucblocks = cxd2820r_read_ucblocks,
682 .read_signal_strength = cxd2820r_read_signal_strength,
683};
684
685struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *cfg,
686 struct i2c_adapter *i2c, int *gpio_chip_base
687)
688{
689 struct cxd2820r_priv *priv;
690 int ret;
691 u8 tmp;
692
693 priv = kzalloc(sizeof(struct cxd2820r_priv), GFP_KERNEL);
694 if (!priv) {
695 ret = -ENOMEM;
696 dev_err(&i2c->dev, "%s: kzalloc() failed\n",
697 KBUILD_MODNAME);
698 goto error;
699 }
700
701 priv->i2c = i2c;
702 memcpy(&priv->cfg, cfg, sizeof(struct cxd2820r_config));
703 memcpy(&priv->fe.ops, &cxd2820r_ops, sizeof(struct dvb_frontend_ops));
704 priv->fe.demodulator_priv = priv;
705
706 priv->bank[0] = priv->bank[1] = 0xff;
707 ret = cxd2820r_rd_reg(priv, 0x000fd, &tmp);
708 dev_dbg(&priv->i2c->dev, "%s: chip id=%02x\n", __func__, tmp);
709 if (ret || tmp != 0xe1)
710 goto error;
711
712 if (gpio_chip_base) {
713#ifdef CONFIG_GPIOLIB
714 /* add GPIOs */
715 priv->gpio_chip.label = KBUILD_MODNAME;
716 priv->gpio_chip.dev = &priv->i2c->dev;
717 priv->gpio_chip.owner = THIS_MODULE;
718 priv->gpio_chip.direction_output =
719 cxd2820r_gpio_direction_output;
720 priv->gpio_chip.set = cxd2820r_gpio_set;
721 priv->gpio_chip.get = cxd2820r_gpio_get;
722 priv->gpio_chip.base = -1; /* dynamic allocation */
723 priv->gpio_chip.ngpio = GPIO_COUNT;
724 priv->gpio_chip.can_sleep = 1;
725 ret = gpiochip_add(&priv->gpio_chip);
726 if (ret)
727 goto error;
728
729 dev_dbg(&priv->i2c->dev, "%s: gpio_chip.base=%d\n", __func__,
730 priv->gpio_chip.base);
731
732 *gpio_chip_base = priv->gpio_chip.base;
733#else
734 /*
735 * Use static GPIO configuration if GPIOLIB is undefined.
736 * This is fallback condition.
737 */
738 u8 gpio[GPIO_COUNT];
739 gpio[0] = (*gpio_chip_base >> 0) & 0x07;
740 gpio[1] = (*gpio_chip_base >> 3) & 0x07;
741 gpio[2] = 0;
742 ret = cxd2820r_gpio(&priv->fe, gpio);
743 if (ret)
744 goto error;
745#endif
746 }
747
748 return &priv->fe;
749error:
750 dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
751 kfree(priv);
752 return NULL;
753}
754EXPORT_SYMBOL(cxd2820r_attach);
755
756MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
757MODULE_DESCRIPTION("Sony CXD2820R demodulator driver");
758MODULE_LICENSE("GPL");