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 /* Max transfer size done by I2C transfer functions */
25 #define MAX_XFER_SIZE 64
27 /* write multiple registers */
28 static int cxd2820r_wr_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
32 u8 buf[MAX_XFER_SIZE];
33 struct i2c_msg msg[1] = {
42 if (1 + len > sizeof(buf)) {
43 dev_warn(&priv->i2c->dev,
44 "%s: i2c wr reg=%04x: len=%d is too big!\n",
45 KBUILD_MODNAME, reg, len);
50 memcpy(&buf[1], val, len);
52 ret = i2c_transfer(priv->i2c, msg, 1);
56 dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \
57 "len=%d\n", KBUILD_MODNAME, ret, reg, len);
63 /* read multiple registers */
64 static int cxd2820r_rd_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
68 u8 buf[MAX_XFER_SIZE];
69 struct i2c_msg msg[2] = {
83 if (len > sizeof(buf)) {
84 dev_warn(&priv->i2c->dev,
85 "%s: i2c wr reg=%04x: len=%d is too big!\n",
86 KBUILD_MODNAME, reg, len);
90 ret = i2c_transfer(priv->i2c, msg, 2);
92 memcpy(val, buf, len);
95 dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \
96 "len=%d\n", KBUILD_MODNAME, ret, reg, len);
103 /* write multiple registers */
104 int cxd2820r_wr_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
109 u8 reg = (reginfo >> 0) & 0xff;
110 u8 bank = (reginfo >> 8) & 0xff;
111 u8 i2c = (reginfo >> 16) & 0x01;
115 i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
117 i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
119 /* switch bank if needed */
120 if (bank != priv->bank[i2c]) {
121 ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1);
124 priv->bank[i2c] = bank;
126 return cxd2820r_wr_regs_i2c(priv, i2c_addr, reg, val, len);
129 /* read multiple registers */
130 int cxd2820r_rd_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
135 u8 reg = (reginfo >> 0) & 0xff;
136 u8 bank = (reginfo >> 8) & 0xff;
137 u8 i2c = (reginfo >> 16) & 0x01;
141 i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
143 i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
145 /* switch bank if needed */
146 if (bank != priv->bank[i2c]) {
147 ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1);
150 priv->bank[i2c] = bank;
152 return cxd2820r_rd_regs_i2c(priv, i2c_addr, reg, val, len);
155 /* write single register */
156 int cxd2820r_wr_reg(struct cxd2820r_priv *priv, u32 reg, u8 val)
158 return cxd2820r_wr_regs(priv, reg, &val, 1);
161 /* read single register */
162 int cxd2820r_rd_reg(struct cxd2820r_priv *priv, u32 reg, u8 *val)
164 return cxd2820r_rd_regs(priv, reg, val, 1);
167 /* write single register with mask */
168 int cxd2820r_wr_reg_mask(struct cxd2820r_priv *priv, u32 reg, u8 val,
174 /* no need for read if whole reg is written */
176 ret = cxd2820r_rd_reg(priv, reg, &tmp);
185 return cxd2820r_wr_reg(priv, reg, val);
188 int cxd2820r_gpio(struct dvb_frontend *fe, u8 *gpio)
190 struct cxd2820r_priv *priv = fe->demodulator_priv;
194 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
195 fe->dtv_property_cache.delivery_system);
197 /* update GPIOs only when needed */
198 if (!memcmp(gpio, priv->gpio, sizeof(priv->gpio)))
203 for (i = 0; i < sizeof(priv->gpio); i++) {
204 /* enable / disable */
205 if (gpio[i] & CXD2820R_GPIO_E)
206 tmp0 |= (2 << 6) >> (2 * i);
208 tmp0 |= (1 << 6) >> (2 * i);
211 if (gpio[i] & CXD2820R_GPIO_I)
212 tmp1 |= (1 << (3 + i));
214 tmp1 |= (0 << (3 + i));
217 if (gpio[i] & CXD2820R_GPIO_H)
218 tmp1 |= (1 << (0 + i));
220 tmp1 |= (0 << (0 + i));
222 dev_dbg(&priv->i2c->dev, "%s: gpio i=%d %02x %02x\n", __func__,
226 dev_dbg(&priv->i2c->dev, "%s: wr gpio=%02x %02x\n", __func__, tmp0,
229 /* write bits [7:2] */
230 ret = cxd2820r_wr_reg_mask(priv, 0x00089, tmp0, 0xfc);
234 /* write bits [5:0] */
235 ret = cxd2820r_wr_reg_mask(priv, 0x0008e, tmp1, 0x3f);
239 memcpy(priv->gpio, gpio, sizeof(priv->gpio));
243 dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
247 static int cxd2820r_set_frontend(struct dvb_frontend *fe)
249 struct cxd2820r_priv *priv = fe->demodulator_priv;
250 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
253 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
254 fe->dtv_property_cache.delivery_system);
256 switch (c->delivery_system) {
258 ret = cxd2820r_init_t(fe);
261 ret = cxd2820r_set_frontend_t(fe);
266 ret = cxd2820r_init_t(fe);
269 ret = cxd2820r_set_frontend_t2(fe);
273 case SYS_DVBC_ANNEX_A:
274 ret = cxd2820r_init_c(fe);
277 ret = cxd2820r_set_frontend_c(fe);
282 dev_dbg(&priv->i2c->dev, "%s: error state=%d\n", __func__,
283 fe->dtv_property_cache.delivery_system);
291 static int cxd2820r_read_status(struct dvb_frontend *fe, enum fe_status *status)
293 struct cxd2820r_priv *priv = fe->demodulator_priv;
296 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
297 fe->dtv_property_cache.delivery_system);
299 switch (fe->dtv_property_cache.delivery_system) {
301 ret = cxd2820r_read_status_t(fe, status);
304 ret = cxd2820r_read_status_t2(fe, status);
306 case SYS_DVBC_ANNEX_A:
307 ret = cxd2820r_read_status_c(fe, status);
316 static int cxd2820r_get_frontend(struct dvb_frontend *fe,
317 struct dtv_frontend_properties *p)
319 struct cxd2820r_priv *priv = fe->demodulator_priv;
322 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
323 fe->dtv_property_cache.delivery_system);
325 if (priv->delivery_system == SYS_UNDEFINED)
328 switch (fe->dtv_property_cache.delivery_system) {
330 ret = cxd2820r_get_frontend_t(fe, p);
333 ret = cxd2820r_get_frontend_t2(fe, p);
335 case SYS_DVBC_ANNEX_A:
336 ret = cxd2820r_get_frontend_c(fe, p);
345 static int cxd2820r_read_ber(struct dvb_frontend *fe, u32 *ber)
347 struct cxd2820r_priv *priv = fe->demodulator_priv;
350 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
351 fe->dtv_property_cache.delivery_system);
353 switch (fe->dtv_property_cache.delivery_system) {
355 ret = cxd2820r_read_ber_t(fe, ber);
358 ret = cxd2820r_read_ber_t2(fe, ber);
360 case SYS_DVBC_ANNEX_A:
361 ret = cxd2820r_read_ber_c(fe, ber);
370 static int cxd2820r_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
372 struct cxd2820r_priv *priv = fe->demodulator_priv;
375 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
376 fe->dtv_property_cache.delivery_system);
378 switch (fe->dtv_property_cache.delivery_system) {
380 ret = cxd2820r_read_signal_strength_t(fe, strength);
383 ret = cxd2820r_read_signal_strength_t2(fe, strength);
385 case SYS_DVBC_ANNEX_A:
386 ret = cxd2820r_read_signal_strength_c(fe, strength);
395 static int cxd2820r_read_snr(struct dvb_frontend *fe, u16 *snr)
397 struct cxd2820r_priv *priv = fe->demodulator_priv;
400 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
401 fe->dtv_property_cache.delivery_system);
403 switch (fe->dtv_property_cache.delivery_system) {
405 ret = cxd2820r_read_snr_t(fe, snr);
408 ret = cxd2820r_read_snr_t2(fe, snr);
410 case SYS_DVBC_ANNEX_A:
411 ret = cxd2820r_read_snr_c(fe, snr);
420 static int cxd2820r_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
422 struct cxd2820r_priv *priv = fe->demodulator_priv;
425 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
426 fe->dtv_property_cache.delivery_system);
428 switch (fe->dtv_property_cache.delivery_system) {
430 ret = cxd2820r_read_ucblocks_t(fe, ucblocks);
433 ret = cxd2820r_read_ucblocks_t2(fe, ucblocks);
435 case SYS_DVBC_ANNEX_A:
436 ret = cxd2820r_read_ucblocks_c(fe, ucblocks);
445 static int cxd2820r_init(struct dvb_frontend *fe)
450 static int cxd2820r_sleep(struct dvb_frontend *fe)
452 struct cxd2820r_priv *priv = fe->demodulator_priv;
455 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
456 fe->dtv_property_cache.delivery_system);
458 switch (fe->dtv_property_cache.delivery_system) {
460 ret = cxd2820r_sleep_t(fe);
463 ret = cxd2820r_sleep_t2(fe);
465 case SYS_DVBC_ANNEX_A:
466 ret = cxd2820r_sleep_c(fe);
475 static int cxd2820r_get_tune_settings(struct dvb_frontend *fe,
476 struct dvb_frontend_tune_settings *s)
478 struct cxd2820r_priv *priv = fe->demodulator_priv;
481 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
482 fe->dtv_property_cache.delivery_system);
484 switch (fe->dtv_property_cache.delivery_system) {
486 ret = cxd2820r_get_tune_settings_t(fe, s);
489 ret = cxd2820r_get_tune_settings_t2(fe, s);
491 case SYS_DVBC_ANNEX_A:
492 ret = cxd2820r_get_tune_settings_c(fe, s);
501 static enum dvbfe_search cxd2820r_search(struct dvb_frontend *fe)
503 struct cxd2820r_priv *priv = fe->demodulator_priv;
504 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
506 enum fe_status status = 0;
508 dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__,
509 fe->dtv_property_cache.delivery_system);
511 /* switch between DVB-T and DVB-T2 when tune fails */
512 if (priv->last_tune_failed) {
513 if (priv->delivery_system == SYS_DVBT) {
514 ret = cxd2820r_sleep_t(fe);
518 c->delivery_system = SYS_DVBT2;
519 } else if (priv->delivery_system == SYS_DVBT2) {
520 ret = cxd2820r_sleep_t2(fe);
524 c->delivery_system = SYS_DVBT;
529 ret = cxd2820r_set_frontend(fe);
534 /* frontend lock wait loop count */
535 switch (priv->delivery_system) {
537 case SYS_DVBC_ANNEX_A:
549 /* wait frontend lock */
551 dev_dbg(&priv->i2c->dev, "%s: loop=%d\n", __func__, i);
553 ret = cxd2820r_read_status(fe, &status);
557 if (status & FE_HAS_LOCK)
561 /* check if we have a valid signal */
562 if (status & FE_HAS_LOCK) {
563 priv->last_tune_failed = false;
564 return DVBFE_ALGO_SEARCH_SUCCESS;
566 priv->last_tune_failed = true;
567 return DVBFE_ALGO_SEARCH_AGAIN;
571 dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
572 return DVBFE_ALGO_SEARCH_ERROR;
575 static int cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
577 return DVBFE_ALGO_CUSTOM;
580 static void cxd2820r_release(struct dvb_frontend *fe)
582 struct cxd2820r_priv *priv = fe->demodulator_priv;
584 dev_dbg(&priv->i2c->dev, "%s\n", __func__);
586 #ifdef CONFIG_GPIOLIB
588 if (priv->gpio_chip.label)
589 gpiochip_remove(&priv->gpio_chip);
596 static int cxd2820r_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
598 struct cxd2820r_priv *priv = fe->demodulator_priv;
600 dev_dbg(&priv->i2c->dev, "%s: %d\n", __func__, enable);
602 /* Bit 0 of reg 0xdb in bank 0x00 controls I2C repeater */
603 return cxd2820r_wr_reg_mask(priv, 0xdb, enable ? 1 : 0, 0x1);
606 #ifdef CONFIG_GPIOLIB
607 static int cxd2820r_gpio_direction_output(struct gpio_chip *chip, unsigned nr,
610 struct cxd2820r_priv *priv = gpiochip_get_data(chip);
613 dev_dbg(&priv->i2c->dev, "%s: nr=%d val=%d\n", __func__, nr, val);
615 memcpy(gpio, priv->gpio, sizeof(gpio));
616 gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
618 return cxd2820r_gpio(&priv->fe, gpio);
621 static void cxd2820r_gpio_set(struct gpio_chip *chip, unsigned nr, int val)
623 struct cxd2820r_priv *priv = gpiochip_get_data(chip);
626 dev_dbg(&priv->i2c->dev, "%s: nr=%d val=%d\n", __func__, nr, val);
628 memcpy(gpio, priv->gpio, sizeof(gpio));
629 gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
631 (void) cxd2820r_gpio(&priv->fe, gpio);
636 static int cxd2820r_gpio_get(struct gpio_chip *chip, unsigned nr)
638 struct cxd2820r_priv *priv = gpiochip_get_data(chip);
640 dev_dbg(&priv->i2c->dev, "%s: nr=%d\n", __func__, nr);
642 return (priv->gpio[nr] >> 2) & 0x01;
646 static const struct dvb_frontend_ops cxd2820r_ops = {
647 .delsys = { SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A },
648 /* default: DVB-T/T2 */
650 .name = "Sony CXD2820R",
652 .caps = FE_CAN_FEC_1_2 |
665 FE_CAN_TRANSMISSION_MODE_AUTO |
666 FE_CAN_GUARD_INTERVAL_AUTO |
667 FE_CAN_HIERARCHY_AUTO |
669 FE_CAN_2G_MODULATION |
673 .release = cxd2820r_release,
674 .init = cxd2820r_init,
675 .sleep = cxd2820r_sleep,
677 .get_tune_settings = cxd2820r_get_tune_settings,
678 .i2c_gate_ctrl = cxd2820r_i2c_gate_ctrl,
680 .get_frontend = cxd2820r_get_frontend,
682 .get_frontend_algo = cxd2820r_get_frontend_algo,
683 .search = cxd2820r_search,
685 .read_status = cxd2820r_read_status,
686 .read_snr = cxd2820r_read_snr,
687 .read_ber = cxd2820r_read_ber,
688 .read_ucblocks = cxd2820r_read_ucblocks,
689 .read_signal_strength = cxd2820r_read_signal_strength,
692 struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *cfg,
693 struct i2c_adapter *i2c, int *gpio_chip_base
696 struct cxd2820r_priv *priv;
700 priv = kzalloc(sizeof(struct cxd2820r_priv), GFP_KERNEL);
703 dev_err(&i2c->dev, "%s: kzalloc() failed\n",
709 memcpy(&priv->cfg, cfg, sizeof(struct cxd2820r_config));
710 memcpy(&priv->fe.ops, &cxd2820r_ops, sizeof(struct dvb_frontend_ops));
711 priv->fe.demodulator_priv = priv;
713 priv->bank[0] = priv->bank[1] = 0xff;
714 ret = cxd2820r_rd_reg(priv, 0x000fd, &tmp);
715 dev_dbg(&priv->i2c->dev, "%s: chip id=%02x\n", __func__, tmp);
716 if (ret || tmp != 0xe1)
719 if (gpio_chip_base) {
720 #ifdef CONFIG_GPIOLIB
722 priv->gpio_chip.label = KBUILD_MODNAME;
723 priv->gpio_chip.parent = &priv->i2c->dev;
724 priv->gpio_chip.owner = THIS_MODULE;
725 priv->gpio_chip.direction_output =
726 cxd2820r_gpio_direction_output;
727 priv->gpio_chip.set = cxd2820r_gpio_set;
728 priv->gpio_chip.get = cxd2820r_gpio_get;
729 priv->gpio_chip.base = -1; /* dynamic allocation */
730 priv->gpio_chip.ngpio = GPIO_COUNT;
731 priv->gpio_chip.can_sleep = 1;
732 ret = gpiochip_add_data(&priv->gpio_chip, priv);
736 dev_dbg(&priv->i2c->dev, "%s: gpio_chip.base=%d\n", __func__,
737 priv->gpio_chip.base);
739 *gpio_chip_base = priv->gpio_chip.base;
742 * Use static GPIO configuration if GPIOLIB is undefined.
743 * This is fallback condition.
746 gpio[0] = (*gpio_chip_base >> 0) & 0x07;
747 gpio[1] = (*gpio_chip_base >> 3) & 0x07;
749 ret = cxd2820r_gpio(&priv->fe, gpio);
757 dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
761 EXPORT_SYMBOL(cxd2820r_attach);
763 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
764 MODULE_DESCRIPTION("Sony CXD2820R demodulator driver");
765 MODULE_LICENSE("GPL");