2 * Sony CXD2820R demodulator driver
4 * Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
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.
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.
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.
22 #include "cxd2820r_priv.h"
24 /* write multiple registers */
25 static int cxd2820r_wr_regs_i2c(struct cxd2820r_priv
*priv
, u8 i2c
, u8 reg
,
30 struct i2c_msg msg
[1] = {
40 memcpy(&buf
[1], val
, len
);
42 ret
= i2c_transfer(priv
->i2c
, msg
, 1);
46 dev_warn(&priv
->i2c
->dev
, "%s: i2c wr failed=%d reg=%02x " \
47 "len=%d\n", KBUILD_MODNAME
, ret
, reg
, len
);
53 /* read multiple registers */
54 static int cxd2820r_rd_regs_i2c(struct cxd2820r_priv
*priv
, u8 i2c
, u8 reg
,
59 struct i2c_msg msg
[2] = {
73 ret
= i2c_transfer(priv
->i2c
, msg
, 2);
75 memcpy(val
, buf
, len
);
78 dev_warn(&priv
->i2c
->dev
, "%s: i2c rd failed=%d reg=%02x " \
79 "len=%d\n", KBUILD_MODNAME
, ret
, reg
, len
);
86 /* write multiple registers */
87 int cxd2820r_wr_regs(struct cxd2820r_priv
*priv
, u32 reginfo
, u8
*val
,
92 u8 reg
= (reginfo
>> 0) & 0xff;
93 u8 bank
= (reginfo
>> 8) & 0xff;
94 u8 i2c
= (reginfo
>> 16) & 0x01;
98 i2c_addr
= priv
->cfg
.i2c_address
| (1 << 1); /* DVB-C */
100 i2c_addr
= priv
->cfg
.i2c_address
; /* DVB-T/T2 */
102 /* switch bank if needed */
103 if (bank
!= priv
->bank
[i2c
]) {
104 ret
= cxd2820r_wr_regs_i2c(priv
, i2c_addr
, 0x00, &bank
, 1);
107 priv
->bank
[i2c
] = bank
;
109 return cxd2820r_wr_regs_i2c(priv
, i2c_addr
, reg
, val
, len
);
112 /* read multiple registers */
113 int cxd2820r_rd_regs(struct cxd2820r_priv
*priv
, u32 reginfo
, u8
*val
,
118 u8 reg
= (reginfo
>> 0) & 0xff;
119 u8 bank
= (reginfo
>> 8) & 0xff;
120 u8 i2c
= (reginfo
>> 16) & 0x01;
124 i2c_addr
= priv
->cfg
.i2c_address
| (1 << 1); /* DVB-C */
126 i2c_addr
= priv
->cfg
.i2c_address
; /* DVB-T/T2 */
128 /* switch bank if needed */
129 if (bank
!= priv
->bank
[i2c
]) {
130 ret
= cxd2820r_wr_regs_i2c(priv
, i2c_addr
, 0x00, &bank
, 1);
133 priv
->bank
[i2c
] = bank
;
135 return cxd2820r_rd_regs_i2c(priv
, i2c_addr
, reg
, val
, len
);
138 /* write single register */
139 int cxd2820r_wr_reg(struct cxd2820r_priv
*priv
, u32 reg
, u8 val
)
141 return cxd2820r_wr_regs(priv
, reg
, &val
, 1);
144 /* read single register */
145 int cxd2820r_rd_reg(struct cxd2820r_priv
*priv
, u32 reg
, u8
*val
)
147 return cxd2820r_rd_regs(priv
, reg
, val
, 1);
150 /* write single register with mask */
151 int cxd2820r_wr_reg_mask(struct cxd2820r_priv
*priv
, u32 reg
, u8 val
,
157 /* no need for read if whole reg is written */
159 ret
= cxd2820r_rd_reg(priv
, reg
, &tmp
);
168 return cxd2820r_wr_reg(priv
, reg
, val
);
171 int cxd2820r_gpio(struct dvb_frontend
*fe
, u8
*gpio
)
173 struct cxd2820r_priv
*priv
= fe
->demodulator_priv
;
177 dev_dbg(&priv
->i2c
->dev
, "%s: delsys=%d\n", __func__
,
178 fe
->dtv_property_cache
.delivery_system
);
180 /* update GPIOs only when needed */
181 if (!memcmp(gpio
, priv
->gpio
, sizeof(priv
->gpio
)))
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
);
191 tmp0
|= (1 << 6) >> (2 * i
);
194 if (gpio
[i
] & CXD2820R_GPIO_I
)
195 tmp1
|= (1 << (3 + i
));
197 tmp1
|= (0 << (3 + i
));
200 if (gpio
[i
] & CXD2820R_GPIO_H
)
201 tmp1
|= (1 << (0 + i
));
203 tmp1
|= (0 << (0 + i
));
205 dev_dbg(&priv
->i2c
->dev
, "%s: gpio i=%d %02x %02x\n", __func__
,
209 dev_dbg(&priv
->i2c
->dev
, "%s: wr gpio=%02x %02x\n", __func__
, tmp0
,
212 /* write bits [7:2] */
213 ret
= cxd2820r_wr_reg_mask(priv
, 0x00089, tmp0
, 0xfc);
217 /* write bits [5:0] */
218 ret
= cxd2820r_wr_reg_mask(priv
, 0x0008e, tmp1
, 0x3f);
222 memcpy(priv
->gpio
, gpio
, sizeof(priv
->gpio
));
226 dev_dbg(&priv
->i2c
->dev
, "%s: failed=%d\n", __func__
, ret
);
230 /* 64 bit div with round closest, like DIV_ROUND_CLOSEST but 64 bit */
231 u32
cxd2820r_div_u64_round_closest(u64 dividend
, u32 divisor
)
233 return div_u64(dividend
+ (divisor
/ 2), divisor
);
236 static int cxd2820r_set_frontend(struct dvb_frontend
*fe
)
238 struct cxd2820r_priv
*priv
= fe
->demodulator_priv
;
239 struct dtv_frontend_properties
*c
= &fe
->dtv_property_cache
;
242 dev_dbg(&priv
->i2c
->dev
, "%s: delsys=%d\n", __func__
,
243 fe
->dtv_property_cache
.delivery_system
);
245 switch (c
->delivery_system
) {
247 ret
= cxd2820r_init_t(fe
);
250 ret
= cxd2820r_set_frontend_t(fe
);
255 ret
= cxd2820r_init_t(fe
);
258 ret
= cxd2820r_set_frontend_t2(fe
);
262 case SYS_DVBC_ANNEX_A
:
263 ret
= cxd2820r_init_c(fe
);
266 ret
= cxd2820r_set_frontend_c(fe
);
271 dev_dbg(&priv
->i2c
->dev
, "%s: error state=%d\n", __func__
,
272 fe
->dtv_property_cache
.delivery_system
);
279 static int cxd2820r_read_status(struct dvb_frontend
*fe
, fe_status_t
*status
)
281 struct cxd2820r_priv
*priv
= fe
->demodulator_priv
;
284 dev_dbg(&priv
->i2c
->dev
, "%s: delsys=%d\n", __func__
,
285 fe
->dtv_property_cache
.delivery_system
);
287 switch (fe
->dtv_property_cache
.delivery_system
) {
289 ret
= cxd2820r_read_status_t(fe
, status
);
292 ret
= cxd2820r_read_status_t2(fe
, status
);
294 case SYS_DVBC_ANNEX_A
:
295 ret
= cxd2820r_read_status_c(fe
, status
);
304 static int cxd2820r_get_frontend(struct dvb_frontend
*fe
)
306 struct cxd2820r_priv
*priv
= fe
->demodulator_priv
;
309 dev_dbg(&priv
->i2c
->dev
, "%s: delsys=%d\n", __func__
,
310 fe
->dtv_property_cache
.delivery_system
);
312 if (priv
->delivery_system
== SYS_UNDEFINED
)
315 switch (fe
->dtv_property_cache
.delivery_system
) {
317 ret
= cxd2820r_get_frontend_t(fe
);
320 ret
= cxd2820r_get_frontend_t2(fe
);
322 case SYS_DVBC_ANNEX_A
:
323 ret
= cxd2820r_get_frontend_c(fe
);
332 static int cxd2820r_read_ber(struct dvb_frontend
*fe
, u32
*ber
)
334 struct cxd2820r_priv
*priv
= fe
->demodulator_priv
;
337 dev_dbg(&priv
->i2c
->dev
, "%s: delsys=%d\n", __func__
,
338 fe
->dtv_property_cache
.delivery_system
);
340 switch (fe
->dtv_property_cache
.delivery_system
) {
342 ret
= cxd2820r_read_ber_t(fe
, ber
);
345 ret
= cxd2820r_read_ber_t2(fe
, ber
);
347 case SYS_DVBC_ANNEX_A
:
348 ret
= cxd2820r_read_ber_c(fe
, ber
);
357 static int cxd2820r_read_signal_strength(struct dvb_frontend
*fe
, u16
*strength
)
359 struct cxd2820r_priv
*priv
= fe
->demodulator_priv
;
362 dev_dbg(&priv
->i2c
->dev
, "%s: delsys=%d\n", __func__
,
363 fe
->dtv_property_cache
.delivery_system
);
365 switch (fe
->dtv_property_cache
.delivery_system
) {
367 ret
= cxd2820r_read_signal_strength_t(fe
, strength
);
370 ret
= cxd2820r_read_signal_strength_t2(fe
, strength
);
372 case SYS_DVBC_ANNEX_A
:
373 ret
= cxd2820r_read_signal_strength_c(fe
, strength
);
382 static int cxd2820r_read_snr(struct dvb_frontend
*fe
, u16
*snr
)
384 struct cxd2820r_priv
*priv
= fe
->demodulator_priv
;
387 dev_dbg(&priv
->i2c
->dev
, "%s: delsys=%d\n", __func__
,
388 fe
->dtv_property_cache
.delivery_system
);
390 switch (fe
->dtv_property_cache
.delivery_system
) {
392 ret
= cxd2820r_read_snr_t(fe
, snr
);
395 ret
= cxd2820r_read_snr_t2(fe
, snr
);
397 case SYS_DVBC_ANNEX_A
:
398 ret
= cxd2820r_read_snr_c(fe
, snr
);
407 static int cxd2820r_read_ucblocks(struct dvb_frontend
*fe
, u32
*ucblocks
)
409 struct cxd2820r_priv
*priv
= fe
->demodulator_priv
;
412 dev_dbg(&priv
->i2c
->dev
, "%s: delsys=%d\n", __func__
,
413 fe
->dtv_property_cache
.delivery_system
);
415 switch (fe
->dtv_property_cache
.delivery_system
) {
417 ret
= cxd2820r_read_ucblocks_t(fe
, ucblocks
);
420 ret
= cxd2820r_read_ucblocks_t2(fe
, ucblocks
);
422 case SYS_DVBC_ANNEX_A
:
423 ret
= cxd2820r_read_ucblocks_c(fe
, ucblocks
);
432 static int cxd2820r_init(struct dvb_frontend
*fe
)
437 static int cxd2820r_sleep(struct dvb_frontend
*fe
)
439 struct cxd2820r_priv
*priv
= fe
->demodulator_priv
;
442 dev_dbg(&priv
->i2c
->dev
, "%s: delsys=%d\n", __func__
,
443 fe
->dtv_property_cache
.delivery_system
);
445 switch (fe
->dtv_property_cache
.delivery_system
) {
447 ret
= cxd2820r_sleep_t(fe
);
450 ret
= cxd2820r_sleep_t2(fe
);
452 case SYS_DVBC_ANNEX_A
:
453 ret
= cxd2820r_sleep_c(fe
);
462 static int cxd2820r_get_tune_settings(struct dvb_frontend
*fe
,
463 struct dvb_frontend_tune_settings
*s
)
465 struct cxd2820r_priv
*priv
= fe
->demodulator_priv
;
468 dev_dbg(&priv
->i2c
->dev
, "%s: delsys=%d\n", __func__
,
469 fe
->dtv_property_cache
.delivery_system
);
471 switch (fe
->dtv_property_cache
.delivery_system
) {
473 ret
= cxd2820r_get_tune_settings_t(fe
, s
);
476 ret
= cxd2820r_get_tune_settings_t2(fe
, s
);
478 case SYS_DVBC_ANNEX_A
:
479 ret
= cxd2820r_get_tune_settings_c(fe
, s
);
488 static enum dvbfe_search
cxd2820r_search(struct dvb_frontend
*fe
)
490 struct cxd2820r_priv
*priv
= fe
->demodulator_priv
;
491 struct dtv_frontend_properties
*c
= &fe
->dtv_property_cache
;
493 fe_status_t status
= 0;
495 dev_dbg(&priv
->i2c
->dev
, "%s: delsys=%d\n", __func__
,
496 fe
->dtv_property_cache
.delivery_system
);
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
);
505 c
->delivery_system
= SYS_DVBT2
;
506 } else if (priv
->delivery_system
== SYS_DVBT2
) {
507 ret
= cxd2820r_sleep_t2(fe
);
511 c
->delivery_system
= SYS_DVBT
;
516 ret
= cxd2820r_set_frontend(fe
);
521 /* frontend lock wait loop count */
522 switch (priv
->delivery_system
) {
524 case SYS_DVBC_ANNEX_A
:
536 /* wait frontend lock */
538 dev_dbg(&priv
->i2c
->dev
, "%s: loop=%d\n", __func__
, i
);
540 ret
= cxd2820r_read_status(fe
, &status
);
544 if (status
& FE_HAS_LOCK
)
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
;
553 priv
->last_tune_failed
= 1;
554 return DVBFE_ALGO_SEARCH_AGAIN
;
558 dev_dbg(&priv
->i2c
->dev
, "%s: failed=%d\n", __func__
, ret
);
559 return DVBFE_ALGO_SEARCH_ERROR
;
562 static int cxd2820r_get_frontend_algo(struct dvb_frontend
*fe
)
564 return DVBFE_ALGO_CUSTOM
;
567 static void cxd2820r_release(struct dvb_frontend
*fe
)
569 struct cxd2820r_priv
*priv
= fe
->demodulator_priv
;
570 int uninitialized_var(ret
); /* silence compiler warning */
572 dev_dbg(&priv
->i2c
->dev
, "%s\n", __func__
);
574 #ifdef CONFIG_GPIOLIB
576 if (priv
->gpio_chip
.label
) {
577 ret
= gpiochip_remove(&priv
->gpio_chip
);
579 dev_err(&priv
->i2c
->dev
, "%s: gpiochip_remove() " \
580 "failed=%d\n", KBUILD_MODNAME
, ret
);
587 static int cxd2820r_i2c_gate_ctrl(struct dvb_frontend
*fe
, int enable
)
589 struct cxd2820r_priv
*priv
= fe
->demodulator_priv
;
591 dev_dbg(&priv
->i2c
->dev
, "%s: %d\n", __func__
, enable
);
593 /* Bit 0 of reg 0xdb in bank 0x00 controls I2C repeater */
594 return cxd2820r_wr_reg_mask(priv
, 0xdb, enable
? 1 : 0, 0x1);
597 #ifdef CONFIG_GPIOLIB
598 static int cxd2820r_gpio_direction_output(struct gpio_chip
*chip
, unsigned nr
,
601 struct cxd2820r_priv
*priv
=
602 container_of(chip
, struct cxd2820r_priv
, gpio_chip
);
605 dev_dbg(&priv
->i2c
->dev
, "%s: nr=%d val=%d\n", __func__
, nr
, val
);
607 memcpy(gpio
, priv
->gpio
, sizeof(gpio
));
608 gpio
[nr
] = CXD2820R_GPIO_E
| CXD2820R_GPIO_O
| (val
<< 2);
610 return cxd2820r_gpio(&priv
->fe
, gpio
);
613 static void cxd2820r_gpio_set(struct gpio_chip
*chip
, unsigned nr
, int val
)
615 struct cxd2820r_priv
*priv
=
616 container_of(chip
, struct cxd2820r_priv
, gpio_chip
);
619 dev_dbg(&priv
->i2c
->dev
, "%s: nr=%d val=%d\n", __func__
, nr
, val
);
621 memcpy(gpio
, priv
->gpio
, sizeof(gpio
));
622 gpio
[nr
] = CXD2820R_GPIO_E
| CXD2820R_GPIO_O
| (val
<< 2);
624 (void) cxd2820r_gpio(&priv
->fe
, gpio
);
629 static int cxd2820r_gpio_get(struct gpio_chip
*chip
, unsigned nr
)
631 struct cxd2820r_priv
*priv
=
632 container_of(chip
, struct cxd2820r_priv
, gpio_chip
);
634 dev_dbg(&priv
->i2c
->dev
, "%s: nr=%d\n", __func__
, nr
);
636 return (priv
->gpio
[nr
] >> 2) & 0x01;
640 static const struct dvb_frontend_ops cxd2820r_ops
= {
641 .delsys
= { SYS_DVBT
, SYS_DVBT2
, SYS_DVBC_ANNEX_A
},
642 /* default: DVB-T/T2 */
644 .name
= "Sony CXD2820R",
646 .caps
= FE_CAN_FEC_1_2
|
659 FE_CAN_TRANSMISSION_MODE_AUTO
|
660 FE_CAN_GUARD_INTERVAL_AUTO
|
661 FE_CAN_HIERARCHY_AUTO
|
666 .release
= cxd2820r_release
,
667 .init
= cxd2820r_init
,
668 .sleep
= cxd2820r_sleep
,
670 .get_tune_settings
= cxd2820r_get_tune_settings
,
671 .i2c_gate_ctrl
= cxd2820r_i2c_gate_ctrl
,
673 .get_frontend
= cxd2820r_get_frontend
,
675 .get_frontend_algo
= cxd2820r_get_frontend_algo
,
676 .search
= cxd2820r_search
,
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
,
685 struct dvb_frontend
*cxd2820r_attach(const struct cxd2820r_config
*cfg
,
686 struct i2c_adapter
*i2c
, int *gpio_chip_base
689 struct cxd2820r_priv
*priv
;
693 priv
= kzalloc(sizeof(struct cxd2820r_priv
), GFP_KERNEL
);
696 dev_err(&i2c
->dev
, "%s: kzalloc() failed\n",
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
;
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)
712 if (gpio_chip_base
) {
713 #ifdef CONFIG_GPIOLIB
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
);
729 dev_dbg(&priv
->i2c
->dev
, "%s: gpio_chip.base=%d\n", __func__
,
730 priv
->gpio_chip
.base
);
732 *gpio_chip_base
= priv
->gpio_chip
.base
;
735 * Use static GPIO configuration if GPIOLIB is undefined.
736 * This is fallback condition.
739 gpio
[0] = (*gpio_chip_base
>> 0) & 0x07;
740 gpio
[1] = (*gpio_chip_base
>> 3) & 0x07;
742 ret
= cxd2820r_gpio(&priv
->fe
, gpio
);
750 dev_dbg(&i2c
->dev
, "%s: failed=%d\n", __func__
, ret
);
754 EXPORT_SYMBOL(cxd2820r_attach
);
756 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
757 MODULE_DESCRIPTION("Sony CXD2820R demodulator driver");
758 MODULE_LICENSE("GPL");