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 int cxd2820r_debug;
25 module_param_named(debug, cxd2820r_debug, int, 0644);
26 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
27
28 /* write multiple registers */
cxd2820r_wr_regs_i2c(struct cxd2820r_priv * priv,u8 i2c,u8 reg,u8 * val,int len)29 static int cxd2820r_wr_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
30 u8 *val, int len)
31 {
32 int ret;
33 u8 buf[len+1];
34 struct i2c_msg msg[1] = {
35 {
36 .addr = i2c,
37 .flags = 0,
38 .len = sizeof(buf),
39 .buf = buf,
40 }
41 };
42
43 buf[0] = reg;
44 memcpy(&buf[1], val, len);
45
46 ret = i2c_transfer(priv->i2c, msg, 1);
47 if (ret == 1) {
48 ret = 0;
49 } else {
50 warn("i2c wr failed ret:%d reg:%02x len:%d", ret, reg, len);
51 ret = -EREMOTEIO;
52 }
53 return ret;
54 }
55
56 /* read multiple registers */
cxd2820r_rd_regs_i2c(struct cxd2820r_priv * priv,u8 i2c,u8 reg,u8 * val,int len)57 static int cxd2820r_rd_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
58 u8 *val, int len)
59 {
60 int ret;
61 u8 buf[len];
62 struct i2c_msg msg[2] = {
63 {
64 .addr = i2c,
65 .flags = 0,
66 .len = 1,
67 .buf = ®,
68 }, {
69 .addr = i2c,
70 .flags = I2C_M_RD,
71 .len = sizeof(buf),
72 .buf = buf,
73 }
74 };
75
76 ret = i2c_transfer(priv->i2c, msg, 2);
77 if (ret == 2) {
78 memcpy(val, buf, len);
79 ret = 0;
80 } else {
81 warn("i2c rd failed ret:%d reg:%02x len:%d", ret, reg, len);
82 ret = -EREMOTEIO;
83 }
84
85 return ret;
86 }
87
88 /* write multiple registers */
cxd2820r_wr_regs(struct cxd2820r_priv * priv,u32 reginfo,u8 * val,int len)89 int cxd2820r_wr_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
90 int len)
91 {
92 int ret;
93 u8 i2c_addr;
94 u8 reg = (reginfo >> 0) & 0xff;
95 u8 bank = (reginfo >> 8) & 0xff;
96 u8 i2c = (reginfo >> 16) & 0x01;
97
98 /* select I2C */
99 if (i2c)
100 i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
101 else
102 i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
103
104 /* switch bank if needed */
105 if (bank != priv->bank[i2c]) {
106 ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1);
107 if (ret)
108 return ret;
109 priv->bank[i2c] = bank;
110 }
111 return cxd2820r_wr_regs_i2c(priv, i2c_addr, reg, val, len);
112 }
113
114 /* read multiple registers */
cxd2820r_rd_regs(struct cxd2820r_priv * priv,u32 reginfo,u8 * val,int len)115 int cxd2820r_rd_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
116 int len)
117 {
118 int ret;
119 u8 i2c_addr;
120 u8 reg = (reginfo >> 0) & 0xff;
121 u8 bank = (reginfo >> 8) & 0xff;
122 u8 i2c = (reginfo >> 16) & 0x01;
123
124 /* select I2C */
125 if (i2c)
126 i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
127 else
128 i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
129
130 /* switch bank if needed */
131 if (bank != priv->bank[i2c]) {
132 ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1);
133 if (ret)
134 return ret;
135 priv->bank[i2c] = bank;
136 }
137 return cxd2820r_rd_regs_i2c(priv, i2c_addr, reg, val, len);
138 }
139
140 /* write single register */
cxd2820r_wr_reg(struct cxd2820r_priv * priv,u32 reg,u8 val)141 int cxd2820r_wr_reg(struct cxd2820r_priv *priv, u32 reg, u8 val)
142 {
143 return cxd2820r_wr_regs(priv, reg, &val, 1);
144 }
145
146 /* read single register */
cxd2820r_rd_reg(struct cxd2820r_priv * priv,u32 reg,u8 * val)147 int cxd2820r_rd_reg(struct cxd2820r_priv *priv, u32 reg, u8 *val)
148 {
149 return cxd2820r_rd_regs(priv, reg, val, 1);
150 }
151
152 /* write single register with mask */
cxd2820r_wr_reg_mask(struct cxd2820r_priv * priv,u32 reg,u8 val,u8 mask)153 int cxd2820r_wr_reg_mask(struct cxd2820r_priv *priv, u32 reg, u8 val,
154 u8 mask)
155 {
156 int ret;
157 u8 tmp;
158
159 /* no need for read if whole reg is written */
160 if (mask != 0xff) {
161 ret = cxd2820r_rd_reg(priv, reg, &tmp);
162 if (ret)
163 return ret;
164
165 val &= mask;
166 tmp &= ~mask;
167 val |= tmp;
168 }
169
170 return cxd2820r_wr_reg(priv, reg, val);
171 }
172
cxd2820r_gpio(struct dvb_frontend * fe)173 int cxd2820r_gpio(struct dvb_frontend *fe)
174 {
175 struct cxd2820r_priv *priv = fe->demodulator_priv;
176 int ret, i;
177 u8 *gpio, tmp0, tmp1;
178 dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
179
180 switch (fe->dtv_property_cache.delivery_system) {
181 case SYS_DVBT:
182 gpio = priv->cfg.gpio_dvbt;
183 break;
184 case SYS_DVBT2:
185 gpio = priv->cfg.gpio_dvbt2;
186 break;
187 case SYS_DVBC_ANNEX_AC:
188 gpio = priv->cfg.gpio_dvbc;
189 break;
190 default:
191 ret = -EINVAL;
192 goto error;
193 }
194
195 /* update GPIOs only when needed */
196 if (!memcmp(gpio, priv->gpio, sizeof(priv->gpio)))
197 return 0;
198
199 tmp0 = 0x00;
200 tmp1 = 0x00;
201 for (i = 0; i < sizeof(priv->gpio); i++) {
202 /* enable / disable */
203 if (gpio[i] & CXD2820R_GPIO_E)
204 tmp0 |= (2 << 6) >> (2 * i);
205 else
206 tmp0 |= (1 << 6) >> (2 * i);
207
208 /* input / output */
209 if (gpio[i] & CXD2820R_GPIO_I)
210 tmp1 |= (1 << (3 + i));
211 else
212 tmp1 |= (0 << (3 + i));
213
214 /* high / low */
215 if (gpio[i] & CXD2820R_GPIO_H)
216 tmp1 |= (1 << (0 + i));
217 else
218 tmp1 |= (0 << (0 + i));
219
220 dbg("%s: GPIO i=%d %02x %02x", __func__, i, tmp0, tmp1);
221 }
222
223 dbg("%s: wr gpio=%02x %02x", __func__, tmp0, tmp1);
224
225 /* write bits [7:2] */
226 ret = cxd2820r_wr_reg_mask(priv, 0x00089, tmp0, 0xfc);
227 if (ret)
228 goto error;
229
230 /* write bits [5:0] */
231 ret = cxd2820r_wr_reg_mask(priv, 0x0008e, tmp1, 0x3f);
232 if (ret)
233 goto error;
234
235 memcpy(priv->gpio, gpio, sizeof(priv->gpio));
236
237 return ret;
238 error:
239 dbg("%s: failed:%d", __func__, ret);
240 return ret;
241 }
242
243 /* 64 bit div with round closest, like DIV_ROUND_CLOSEST but 64 bit */
cxd2820r_div_u64_round_closest(u64 dividend,u32 divisor)244 u32 cxd2820r_div_u64_round_closest(u64 dividend, u32 divisor)
245 {
246 return div_u64(dividend + (divisor / 2), divisor);
247 }
248
cxd2820r_set_frontend(struct dvb_frontend * fe)249 static int cxd2820r_set_frontend(struct dvb_frontend *fe)
250 {
251 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
252 int ret;
253
254 dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
255 switch (c->delivery_system) {
256 case SYS_DVBT:
257 ret = cxd2820r_init_t(fe);
258 if (ret < 0)
259 goto err;
260 ret = cxd2820r_set_frontend_t(fe);
261 if (ret < 0)
262 goto err;
263 break;
264 case SYS_DVBT2:
265 ret = cxd2820r_init_t(fe);
266 if (ret < 0)
267 goto err;
268 ret = cxd2820r_set_frontend_t2(fe);
269 if (ret < 0)
270 goto err;
271 break;
272 case SYS_DVBC_ANNEX_A:
273 ret = cxd2820r_init_c(fe);
274 if (ret < 0)
275 goto err;
276 ret = cxd2820r_set_frontend_c(fe);
277 if (ret < 0)
278 goto err;
279 break;
280 default:
281 dbg("%s: error state=%d", __func__, fe->dtv_property_cache.delivery_system);
282 ret = -EINVAL;
283 break;
284 }
285 err:
286 return ret;
287 }
cxd2820r_read_status(struct dvb_frontend * fe,fe_status_t * status)288 static int cxd2820r_read_status(struct dvb_frontend *fe, fe_status_t *status)
289 {
290 int ret;
291
292 dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
293 switch (fe->dtv_property_cache.delivery_system) {
294 case SYS_DVBT:
295 ret = cxd2820r_read_status_t(fe, status);
296 break;
297 case SYS_DVBT2:
298 ret = cxd2820r_read_status_t2(fe, status);
299 break;
300 case SYS_DVBC_ANNEX_A:
301 ret = cxd2820r_read_status_c(fe, status);
302 break;
303 default:
304 ret = -EINVAL;
305 break;
306 }
307 return ret;
308 }
309
cxd2820r_get_frontend(struct dvb_frontend * fe)310 static int cxd2820r_get_frontend(struct dvb_frontend *fe)
311 {
312 struct cxd2820r_priv *priv = fe->demodulator_priv;
313 int ret;
314
315 dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
316
317 if (priv->delivery_system == SYS_UNDEFINED)
318 return 0;
319
320 switch (fe->dtv_property_cache.delivery_system) {
321 case SYS_DVBT:
322 ret = cxd2820r_get_frontend_t(fe);
323 break;
324 case SYS_DVBT2:
325 ret = cxd2820r_get_frontend_t2(fe);
326 break;
327 case SYS_DVBC_ANNEX_A:
328 ret = cxd2820r_get_frontend_c(fe);
329 break;
330 default:
331 ret = -EINVAL;
332 break;
333 }
334 return ret;
335 }
336
cxd2820r_read_ber(struct dvb_frontend * fe,u32 * ber)337 static int cxd2820r_read_ber(struct dvb_frontend *fe, u32 *ber)
338 {
339 int ret;
340
341 dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
342 switch (fe->dtv_property_cache.delivery_system) {
343 case SYS_DVBT:
344 ret = cxd2820r_read_ber_t(fe, ber);
345 break;
346 case SYS_DVBT2:
347 ret = cxd2820r_read_ber_t2(fe, ber);
348 break;
349 case SYS_DVBC_ANNEX_A:
350 ret = cxd2820r_read_ber_c(fe, ber);
351 break;
352 default:
353 ret = -EINVAL;
354 break;
355 }
356 return ret;
357 }
358
cxd2820r_read_signal_strength(struct dvb_frontend * fe,u16 * strength)359 static int cxd2820r_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
360 {
361 int ret;
362
363 dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
364 switch (fe->dtv_property_cache.delivery_system) {
365 case SYS_DVBT:
366 ret = cxd2820r_read_signal_strength_t(fe, strength);
367 break;
368 case SYS_DVBT2:
369 ret = cxd2820r_read_signal_strength_t2(fe, strength);
370 break;
371 case SYS_DVBC_ANNEX_A:
372 ret = cxd2820r_read_signal_strength_c(fe, strength);
373 break;
374 default:
375 ret = -EINVAL;
376 break;
377 }
378 return ret;
379 }
380
cxd2820r_read_snr(struct dvb_frontend * fe,u16 * snr)381 static int cxd2820r_read_snr(struct dvb_frontend *fe, u16 *snr)
382 {
383 int ret;
384
385 dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
386 switch (fe->dtv_property_cache.delivery_system) {
387 case SYS_DVBT:
388 ret = cxd2820r_read_snr_t(fe, snr);
389 break;
390 case SYS_DVBT2:
391 ret = cxd2820r_read_snr_t2(fe, snr);
392 break;
393 case SYS_DVBC_ANNEX_A:
394 ret = cxd2820r_read_snr_c(fe, snr);
395 break;
396 default:
397 ret = -EINVAL;
398 break;
399 }
400 return ret;
401 }
402
cxd2820r_read_ucblocks(struct dvb_frontend * fe,u32 * ucblocks)403 static int cxd2820r_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
404 {
405 int ret;
406
407 dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
408 switch (fe->dtv_property_cache.delivery_system) {
409 case SYS_DVBT:
410 ret = cxd2820r_read_ucblocks_t(fe, ucblocks);
411 break;
412 case SYS_DVBT2:
413 ret = cxd2820r_read_ucblocks_t2(fe, ucblocks);
414 break;
415 case SYS_DVBC_ANNEX_A:
416 ret = cxd2820r_read_ucblocks_c(fe, ucblocks);
417 break;
418 default:
419 ret = -EINVAL;
420 break;
421 }
422 return ret;
423 }
424
cxd2820r_init(struct dvb_frontend * fe)425 static int cxd2820r_init(struct dvb_frontend *fe)
426 {
427 return 0;
428 }
429
cxd2820r_sleep(struct dvb_frontend * fe)430 static int cxd2820r_sleep(struct dvb_frontend *fe)
431 {
432 int ret;
433
434 dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
435 switch (fe->dtv_property_cache.delivery_system) {
436 case SYS_DVBT:
437 ret = cxd2820r_sleep_t(fe);
438 break;
439 case SYS_DVBT2:
440 ret = cxd2820r_sleep_t2(fe);
441 break;
442 case SYS_DVBC_ANNEX_A:
443 ret = cxd2820r_sleep_c(fe);
444 break;
445 default:
446 ret = -EINVAL;
447 break;
448 }
449 return ret;
450 }
451
cxd2820r_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * s)452 static int cxd2820r_get_tune_settings(struct dvb_frontend *fe,
453 struct dvb_frontend_tune_settings *s)
454 {
455 int ret;
456
457 dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
458 switch (fe->dtv_property_cache.delivery_system) {
459 case SYS_DVBT:
460 ret = cxd2820r_get_tune_settings_t(fe, s);
461 break;
462 case SYS_DVBT2:
463 ret = cxd2820r_get_tune_settings_t2(fe, s);
464 break;
465 case SYS_DVBC_ANNEX_A:
466 ret = cxd2820r_get_tune_settings_c(fe, s);
467 break;
468 default:
469 ret = -EINVAL;
470 break;
471 }
472 return ret;
473 }
474
cxd2820r_search(struct dvb_frontend * fe)475 static enum dvbfe_search cxd2820r_search(struct dvb_frontend *fe)
476 {
477 struct cxd2820r_priv *priv = fe->demodulator_priv;
478 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
479 int ret, i;
480 fe_status_t status = 0;
481 dbg("%s: delsys=%d", __func__, fe->dtv_property_cache.delivery_system);
482
483 /* switch between DVB-T and DVB-T2 when tune fails */
484 if (priv->last_tune_failed) {
485 if (priv->delivery_system == SYS_DVBT) {
486 ret = cxd2820r_sleep_t(fe);
487 if (ret)
488 goto error;
489
490 c->delivery_system = SYS_DVBT2;
491 } else if (priv->delivery_system == SYS_DVBT2) {
492 ret = cxd2820r_sleep_t2(fe);
493 if (ret)
494 goto error;
495
496 c->delivery_system = SYS_DVBT;
497 }
498 }
499
500 /* set frontend */
501 ret = cxd2820r_set_frontend(fe);
502 if (ret)
503 goto error;
504
505
506 /* frontend lock wait loop count */
507 switch (priv->delivery_system) {
508 case SYS_DVBT:
509 case SYS_DVBC_ANNEX_A:
510 i = 20;
511 break;
512 case SYS_DVBT2:
513 i = 40;
514 break;
515 case SYS_UNDEFINED:
516 default:
517 i = 0;
518 break;
519 }
520
521 /* wait frontend lock */
522 for (; i > 0; i--) {
523 dbg("%s: LOOP=%d", __func__, i);
524 msleep(50);
525 ret = cxd2820r_read_status(fe, &status);
526 if (ret)
527 goto error;
528
529 if (status & FE_HAS_SIGNAL)
530 break;
531 }
532
533 /* check if we have a valid signal */
534 if (status) {
535 priv->last_tune_failed = 0;
536 return DVBFE_ALGO_SEARCH_SUCCESS;
537 } else {
538 priv->last_tune_failed = 1;
539 return DVBFE_ALGO_SEARCH_AGAIN;
540 }
541
542 error:
543 dbg("%s: failed:%d", __func__, ret);
544 return DVBFE_ALGO_SEARCH_ERROR;
545 }
546
cxd2820r_get_frontend_algo(struct dvb_frontend * fe)547 static int cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
548 {
549 return DVBFE_ALGO_CUSTOM;
550 }
551
cxd2820r_release(struct dvb_frontend * fe)552 static void cxd2820r_release(struct dvb_frontend *fe)
553 {
554 struct cxd2820r_priv *priv = fe->demodulator_priv;
555 dbg("%s", __func__);
556
557 kfree(priv);
558 return;
559 }
560
cxd2820r_i2c_gate_ctrl(struct dvb_frontend * fe,int enable)561 static int cxd2820r_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
562 {
563 struct cxd2820r_priv *priv = fe->demodulator_priv;
564 dbg("%s: %d", __func__, enable);
565
566 /* Bit 0 of reg 0xdb in bank 0x00 controls I2C repeater */
567 return cxd2820r_wr_reg_mask(priv, 0xdb, enable ? 1 : 0, 0x1);
568 }
569
570 static const struct dvb_frontend_ops cxd2820r_ops = {
571 .delsys = { SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A },
572 /* default: DVB-T/T2 */
573 .info = {
574 .name = "Sony CXD2820R",
575
576 .caps = FE_CAN_FEC_1_2 |
577 FE_CAN_FEC_2_3 |
578 FE_CAN_FEC_3_4 |
579 FE_CAN_FEC_5_6 |
580 FE_CAN_FEC_7_8 |
581 FE_CAN_FEC_AUTO |
582 FE_CAN_QPSK |
583 FE_CAN_QAM_16 |
584 FE_CAN_QAM_32 |
585 FE_CAN_QAM_64 |
586 FE_CAN_QAM_128 |
587 FE_CAN_QAM_256 |
588 FE_CAN_QAM_AUTO |
589 FE_CAN_TRANSMISSION_MODE_AUTO |
590 FE_CAN_GUARD_INTERVAL_AUTO |
591 FE_CAN_HIERARCHY_AUTO |
592 FE_CAN_MUTE_TS |
593 FE_CAN_2G_MODULATION
594 },
595
596 .release = cxd2820r_release,
597 .init = cxd2820r_init,
598 .sleep = cxd2820r_sleep,
599
600 .get_tune_settings = cxd2820r_get_tune_settings,
601 .i2c_gate_ctrl = cxd2820r_i2c_gate_ctrl,
602
603 .get_frontend = cxd2820r_get_frontend,
604
605 .get_frontend_algo = cxd2820r_get_frontend_algo,
606 .search = cxd2820r_search,
607
608 .read_status = cxd2820r_read_status,
609 .read_snr = cxd2820r_read_snr,
610 .read_ber = cxd2820r_read_ber,
611 .read_ucblocks = cxd2820r_read_ucblocks,
612 .read_signal_strength = cxd2820r_read_signal_strength,
613 };
614
cxd2820r_attach(const struct cxd2820r_config * cfg,struct i2c_adapter * i2c)615 struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *cfg,
616 struct i2c_adapter *i2c)
617 {
618 struct cxd2820r_priv *priv = NULL;
619 int ret;
620 u8 tmp;
621
622 priv = kzalloc(sizeof (struct cxd2820r_priv), GFP_KERNEL);
623 if (!priv)
624 goto error;
625
626 priv->i2c = i2c;
627 memcpy(&priv->cfg, cfg, sizeof (struct cxd2820r_config));
628
629 priv->bank[0] = priv->bank[1] = 0xff;
630 ret = cxd2820r_rd_reg(priv, 0x000fd, &tmp);
631 dbg("%s: chip id=%02x", __func__, tmp);
632 if (ret || tmp != 0xe1)
633 goto error;
634
635 memcpy(&priv->fe.ops, &cxd2820r_ops, sizeof (struct dvb_frontend_ops));
636 priv->fe.demodulator_priv = priv;
637 return &priv->fe;
638 error:
639 kfree(priv);
640 return NULL;
641 }
642 EXPORT_SYMBOL(cxd2820r_attach);
643
644 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
645 MODULE_DESCRIPTION("Sony CXD2820R demodulator driver");
646 MODULE_LICENSE("GPL");
647