277 static int sca3000_write_reg(struct sca3000_state *st, u8 address, u8 val)  in sca3000_write_reg()  argument
279 	st->tx[0] = SCA3000_WRITE_REG(address);  in sca3000_write_reg()
280 	st->tx[1] = val;  in sca3000_write_reg()
281 	return spi_write(st->us, st->tx, 2);  in sca3000_write_reg()
284 static int sca3000_read_data_short(struct sca3000_state *st,  in sca3000_read_data_short()  argument
291 			.tx_buf = st->tx,  in sca3000_read_data_short()
294 			.rx_buf = st->rx,  in sca3000_read_data_short()
297 	st->tx[0] = SCA3000_READ_REG(reg_address_high);  in sca3000_read_data_short()
299 	return spi_sync_transfer(st->us, xfer, ARRAY_SIZE(xfer));  in sca3000_read_data_short()
304  * @st: Driver specific device instance data.
308 static int sca3000_reg_lock_on(struct sca3000_state *st)  in sca3000_reg_lock_on()  argument
312 	ret = sca3000_read_data_short(st, SCA3000_REG_STATUS_ADDR, 1);  in sca3000_reg_lock_on()
316 	return !(st->rx[0] & SCA3000_LOCKED);  in sca3000_reg_lock_on()
321  * @st: Driver specific device instance data.
327 static int __sca3000_unlock_reg_lock(struct sca3000_state *st)  in __sca3000_unlock_reg_lock()  argument
333 			.tx_buf = st->tx,  in __sca3000_unlock_reg_lock()
337 			.tx_buf = st->tx + 2,  in __sca3000_unlock_reg_lock()
340 			.tx_buf = st->tx + 4,  in __sca3000_unlock_reg_lock()
343 	st->tx[0] = SCA3000_WRITE_REG(SCA3000_REG_UNLOCK_ADDR);  in __sca3000_unlock_reg_lock()
344 	st->tx[1] = 0x00;  in __sca3000_unlock_reg_lock()
345 	st->tx[2] = SCA3000_WRITE_REG(SCA3000_REG_UNLOCK_ADDR);  in __sca3000_unlock_reg_lock()
346 	st->tx[3] = 0x50;  in __sca3000_unlock_reg_lock()
347 	st->tx[4] = SCA3000_WRITE_REG(SCA3000_REG_UNLOCK_ADDR);  in __sca3000_unlock_reg_lock()
348 	st->tx[5] = 0xA0;  in __sca3000_unlock_reg_lock()
350 	return spi_sync_transfer(st->us, xfer, ARRAY_SIZE(xfer));  in __sca3000_unlock_reg_lock()
355  * @st: Driver specific device instance data.
364 static int sca3000_write_ctrl_reg(struct sca3000_state *st,  in sca3000_write_ctrl_reg()  argument
370 	ret = sca3000_reg_lock_on(st);  in sca3000_write_ctrl_reg()
374 		ret = __sca3000_unlock_reg_lock(st);  in sca3000_write_ctrl_reg()
380 	ret = sca3000_write_reg(st, SCA3000_REG_CTRL_SEL_ADDR, sel);  in sca3000_write_ctrl_reg()
385 	ret = sca3000_write_reg(st, SCA3000_REG_CTRL_DATA_ADDR, val);  in sca3000_write_ctrl_reg()
393  * @st: Driver specific device instance data.
398 static int sca3000_read_ctrl_reg(struct sca3000_state *st,  in sca3000_read_ctrl_reg()  argument
403 	ret = sca3000_reg_lock_on(st);  in sca3000_read_ctrl_reg()
407 		ret = __sca3000_unlock_reg_lock(st);  in sca3000_read_ctrl_reg()
412 	ret = sca3000_write_reg(st, SCA3000_REG_CTRL_SEL_ADDR, ctrl_reg);  in sca3000_read_ctrl_reg()
415 	ret = sca3000_read_data_short(st, SCA3000_REG_CTRL_DATA_ADDR, 1);  in sca3000_read_ctrl_reg()
418 	return st->rx[0];  in sca3000_read_ctrl_reg()
432 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_print_rev()  local
434 	mutex_lock(&st->lock);  in sca3000_print_rev()
435 	ret = sca3000_read_data_short(st, SCA3000_REG_REVID_ADDR, 1);  in sca3000_print_rev()
440 		 st->rx[0] & SCA3000_REG_REVID_MAJOR_MASK,  in sca3000_print_rev()
441 		 st->rx[0] & SCA3000_REG_REVID_MINOR_MASK);  in sca3000_print_rev()
443 	mutex_unlock(&st->lock);  in sca3000_print_rev()
454 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_show_available_3db_freqs()  local
457 	len = sprintf(buf, "%d", st->info->measurement_mode_3db_freq);  in sca3000_show_available_3db_freqs()
458 	if (st->info->option_mode_1)  in sca3000_show_available_3db_freqs()
460 			       st->info->option_mode_1_3db_freq);  in sca3000_show_available_3db_freqs()
461 	if (st->info->option_mode_2)  in sca3000_show_available_3db_freqs()
463 			       st->info->option_mode_2_3db_freq);  in sca3000_show_available_3db_freqs()
559  * @st: Private driver specific device instance specific state.
565 static inline int __sca3000_get_base_freq(struct sca3000_state *st,  in __sca3000_get_base_freq()  argument
571 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in __sca3000_get_base_freq()
574 	switch (SCA3000_REG_MODE_MODE_MASK & st->rx[0]) {  in __sca3000_get_base_freq()
593  * @st: Private driver specific device instance specific state.
598 static int sca3000_read_raw_samp_freq(struct sca3000_state *st, int *val)  in sca3000_read_raw_samp_freq()  argument
602 	ret = __sca3000_get_base_freq(st, st->info, val);  in sca3000_read_raw_samp_freq()
606 	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL);  in sca3000_read_raw_samp_freq()
627  * @st: Private driver specific device instance specific state.
632 static int sca3000_write_raw_samp_freq(struct sca3000_state *st, int val)  in sca3000_write_raw_samp_freq()  argument
636 	ret = __sca3000_get_base_freq(st, st->info, &base_freq);  in sca3000_write_raw_samp_freq()
640 	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL);  in sca3000_write_raw_samp_freq()
653 	return sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL,  in sca3000_write_raw_samp_freq()
657 static int sca3000_read_3db_freq(struct sca3000_state *st, int *val)  in sca3000_read_3db_freq()  argument
661 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_read_3db_freq()
666 	st->rx[0] &= SCA3000_REG_MODE_MODE_MASK;  in sca3000_read_3db_freq()
667 	switch (st->rx[0]) {  in sca3000_read_3db_freq()
669 		*val = st->info->measurement_mode_3db_freq;  in sca3000_read_3db_freq()
674 		*val = st->info->option_mode_1_3db_freq;  in sca3000_read_3db_freq()
677 		*val = st->info->option_mode_2_3db_freq;  in sca3000_read_3db_freq()
684 static int sca3000_write_3db_freq(struct sca3000_state *st, int val)  in sca3000_write_3db_freq()  argument
689 	if (val == st->info->measurement_mode_3db_freq)  in sca3000_write_3db_freq()
691 	else if (st->info->option_mode_1 &&  in sca3000_write_3db_freq()
692 		 (val == st->info->option_mode_1_3db_freq))  in sca3000_write_3db_freq()
694 	else if (st->info->option_mode_2 &&  in sca3000_write_3db_freq()
695 		 (val == st->info->option_mode_2_3db_freq))  in sca3000_write_3db_freq()
699 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_write_3db_freq()
703 	st->rx[0] &= ~SCA3000_REG_MODE_MODE_MASK;  in sca3000_write_3db_freq()
704 	st->rx[0] |= (mode & SCA3000_REG_MODE_MODE_MASK);  in sca3000_write_3db_freq()
706 	return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR, st->rx[0]);  in sca3000_write_3db_freq()
715 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_read_raw()  local
721 		mutex_lock(&st->lock);  in sca3000_read_raw()
723 			if (st->mo_det_use_count) {  in sca3000_read_raw()
724 				mutex_unlock(&st->lock);  in sca3000_read_raw()
728 			ret = sca3000_read_data_short(st, address, 2);  in sca3000_read_raw()
730 				mutex_unlock(&st->lock);  in sca3000_read_raw()
733 			*val = (be16_to_cpup((__be16 *)st->rx) >> 3) & 0x1FFF;  in sca3000_read_raw()
738 			ret = sca3000_read_data_short(st,  in sca3000_read_raw()
742 				mutex_unlock(&st->lock);  in sca3000_read_raw()
745 			*val = ((st->rx[0] & 0x3F) << 3) |  in sca3000_read_raw()
746 			       ((st->rx[1] & 0xE0) >> 5);  in sca3000_read_raw()
748 		mutex_unlock(&st->lock);  in sca3000_read_raw()
753 			*val2 = st->info->scale;  in sca3000_read_raw()
762 		mutex_lock(&st->lock);  in sca3000_read_raw()
763 		ret = sca3000_read_raw_samp_freq(st, val);  in sca3000_read_raw()
764 		mutex_unlock(&st->lock);  in sca3000_read_raw()
767 		mutex_lock(&st->lock);  in sca3000_read_raw()
768 		ret = sca3000_read_3db_freq(st, val);  in sca3000_read_raw()
769 		mutex_unlock(&st->lock);  in sca3000_read_raw()
780 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_write_raw()  local
787 		mutex_lock(&st->lock);  in sca3000_write_raw()
788 		ret = sca3000_write_raw_samp_freq(st, val);  in sca3000_write_raw()
789 		mutex_unlock(&st->lock);  in sca3000_write_raw()
794 		mutex_lock(&st->lock);  in sca3000_write_raw()
795 		ret = sca3000_write_3db_freq(st, val);  in sca3000_write_raw()
796 		mutex_unlock(&st->lock);  in sca3000_write_raw()
821 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_read_av_freq()  local
824 	mutex_lock(&st->lock);  in sca3000_read_av_freq()
825 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_read_av_freq()
826 	val = st->rx[0];  in sca3000_read_av_freq()
827 	mutex_unlock(&st->lock);  in sca3000_read_av_freq()
834 			       st->info->measurement_mode_freq,  in sca3000_read_av_freq()
835 			       st->info->measurement_mode_freq / 2,  in sca3000_read_av_freq()
836 			       st->info->measurement_mode_freq / 4);  in sca3000_read_av_freq()
840 			       st->info->option_mode_1_freq,  in sca3000_read_av_freq()
841 			       st->info->option_mode_1_freq / 2,  in sca3000_read_av_freq()
842 			       st->info->option_mode_1_freq / 4);  in sca3000_read_av_freq()
846 			       st->info->option_mode_2_freq,  in sca3000_read_av_freq()
847 			       st->info->option_mode_2_freq / 2,  in sca3000_read_av_freq()
848 			       st->info->option_mode_2_freq / 4);  in sca3000_read_av_freq()
872 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_read_event_value()  local
878 		mutex_lock(&st->lock);  in sca3000_read_event_value()
879 		ret = sca3000_read_ctrl_reg(st,  in sca3000_read_event_value()
881 		mutex_unlock(&st->lock);  in sca3000_read_event_value()
887 					 ARRAY_SIZE(st->info->mot_det_mult_y))  in sca3000_read_event_value()
888 				*val += st->info->mot_det_mult_y[i];  in sca3000_read_event_value()
891 					 ARRAY_SIZE(st->info->mot_det_mult_xz))  in sca3000_read_event_value()
892 				*val += st->info->mot_det_mult_xz[i];  in sca3000_read_event_value()
924 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_write_event_value()  local
930 		i = ARRAY_SIZE(st->info->mot_det_mult_y);  in sca3000_write_event_value()
932 			if (val >= st->info->mot_det_mult_y[--i]) {  in sca3000_write_event_value()
934 				val -= st->info->mot_det_mult_y[i];  in sca3000_write_event_value()
937 		i = ARRAY_SIZE(st->info->mot_det_mult_xz);  in sca3000_write_event_value()
939 			if (val >= st->info->mot_det_mult_xz[--i]) {  in sca3000_write_event_value()
941 				val -= st->info->mot_det_mult_xz[i];  in sca3000_write_event_value()
945 	mutex_lock(&st->lock);  in sca3000_write_event_value()
946 	ret = sca3000_write_ctrl_reg(st,  in sca3000_write_event_value()
949 	mutex_unlock(&st->lock);  in sca3000_write_event_value()
964 static int sca3000_read_data(struct sca3000_state *st,  in sca3000_read_data()  argument
973 			.tx_buf = st->tx,  in sca3000_read_data()
980 	st->tx[0] = SCA3000_READ_REG(reg_address_high);  in sca3000_read_data()
981 	ret = spi_sync_transfer(st->us, xfer, ARRAY_SIZE(xfer));  in sca3000_read_data()
983 		dev_err(&st->us->dev, "problem reading register\n");  in sca3000_read_data()
997 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_ring_int_process()  local
1000 	mutex_lock(&st->lock);  in sca3000_ring_int_process()
1003 		ret = sca3000_read_data_short(st, SCA3000_REG_BUF_COUNT_ADDR,  in sca3000_ring_int_process()
1007 		num_available = st->rx[0];  in sca3000_ring_int_process()
1012 		ret = sca3000_read_data(st, SCA3000_REG_RING_OUT_ADDR, st->rx,  in sca3000_ring_int_process()
1024 			iio_push_to_buffers(indio_dev, st->rx + i * 3 * 2);  in sca3000_ring_int_process()
1028 	mutex_unlock(&st->lock);  in sca3000_ring_int_process()
1046 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_event_handler()  local
1054 	mutex_lock(&st->lock);  in sca3000_event_handler()
1055 	ret = sca3000_read_data_short(st, SCA3000_REG_INT_STATUS_ADDR, 1);  in sca3000_event_handler()
1056 	val = st->rx[0];  in sca3000_event_handler()
1057 	mutex_unlock(&st->lock);  in sca3000_event_handler()
1111 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_read_event_config()  local
1114 	mutex_lock(&st->lock);  in sca3000_read_event_config()
1116 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_read_event_config()
1122 		ret = !!(st->rx[0] & SCA3000_REG_MODE_FREE_FALL_DETECT);  in sca3000_read_event_config()
1131 		if ((st->rx[0] & SCA3000_REG_MODE_MODE_MASK)  in sca3000_read_event_config()
1135 			ret = sca3000_read_ctrl_reg(st,  in sca3000_read_event_config()
1148 	mutex_unlock(&st->lock);  in sca3000_read_event_config()
1155 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_freefall_set_state()  local
1159 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_freefall_set_state()
1164 	if (state && !(st->rx[0] & SCA3000_REG_MODE_FREE_FALL_DETECT))  in sca3000_freefall_set_state()
1165 		return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,  in sca3000_freefall_set_state()
1166 					 st->rx[0] | SCA3000_REG_MODE_FREE_FALL_DETECT);  in sca3000_freefall_set_state()
1168 	else if (!state && (st->rx[0] & SCA3000_REG_MODE_FREE_FALL_DETECT))  in sca3000_freefall_set_state()
1169 		return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,  in sca3000_freefall_set_state()
1170 					 st->rx[0] & ~SCA3000_REG_MODE_FREE_FALL_DETECT);  in sca3000_freefall_set_state()
1178 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_motion_detect_set_state()  local
1185 	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL);  in sca3000_motion_detect_set_state()
1191 		ret = sca3000_write_ctrl_reg(st,  in sca3000_motion_detect_set_state()
1197 		st->mo_det_use_count++;  in sca3000_motion_detect_set_state()
1199 		ret = sca3000_write_ctrl_reg(st,  in sca3000_motion_detect_set_state()
1205 		st->mo_det_use_count--;  in sca3000_motion_detect_set_state()
1209 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_motion_detect_set_state()
1213 	if ((st->mo_det_use_count) &&  in sca3000_motion_detect_set_state()
1214 	    ((st->rx[0] & SCA3000_REG_MODE_MODE_MASK)  in sca3000_motion_detect_set_state()
1216 		return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,  in sca3000_motion_detect_set_state()
1217 			(st->rx[0] & ~SCA3000_REG_MODE_MODE_MASK)  in sca3000_motion_detect_set_state()
1220 	else if (!(st->mo_det_use_count) &&  in sca3000_motion_detect_set_state()
1221 		 ((st->rx[0] & SCA3000_REG_MODE_MODE_MASK)  in sca3000_motion_detect_set_state()
1223 		return sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,  in sca3000_motion_detect_set_state()
1224 			st->rx[0] & SCA3000_REG_MODE_MODE_MASK);  in sca3000_motion_detect_set_state()
1250 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_write_event_config()  local
1253 	mutex_lock(&st->lock);  in sca3000_write_event_config()
1270 	mutex_unlock(&st->lock);  in sca3000_write_event_config()
1292 	struct sca3000_state *st = iio_priv(indio_dev);  in __sca3000_hw_ring_state_set()  local
1295 	mutex_lock(&st->lock);  in __sca3000_hw_ring_state_set()
1296 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in __sca3000_hw_ring_state_set()
1301 		ret = sca3000_write_reg(st,  in __sca3000_hw_ring_state_set()
1303 			(st->rx[0] | SCA3000_REG_MODE_RING_BUF_ENABLE));  in __sca3000_hw_ring_state_set()
1305 		ret = sca3000_write_reg(st,  in __sca3000_hw_ring_state_set()
1307 			(st->rx[0] & ~SCA3000_REG_MODE_RING_BUF_ENABLE));  in __sca3000_hw_ring_state_set()
1309 	mutex_unlock(&st->lock);  in __sca3000_hw_ring_state_set()
1326 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_hw_ring_preenable()  local
1328 	mutex_lock(&st->lock);  in sca3000_hw_ring_preenable()
1331 	ret = sca3000_read_data_short(st, SCA3000_REG_INT_MASK_ADDR, 1);  in sca3000_hw_ring_preenable()
1334 	ret = sca3000_write_reg(st,  in sca3000_hw_ring_preenable()
1336 				st->rx[0] | SCA3000_REG_INT_MASK_RING_HALF);  in sca3000_hw_ring_preenable()
1340 	mutex_unlock(&st->lock);  in sca3000_hw_ring_preenable()
1345 	mutex_unlock(&st->lock);  in sca3000_hw_ring_preenable()
1353 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_hw_ring_postdisable()  local
1360 	mutex_lock(&st->lock);  in sca3000_hw_ring_postdisable()
1362 	ret = sca3000_read_data_short(st, SCA3000_REG_INT_MASK_ADDR, 1);  in sca3000_hw_ring_postdisable()
1365 	ret = sca3000_write_reg(st,  in sca3000_hw_ring_postdisable()
1367 				st->rx[0] & ~SCA3000_REG_INT_MASK_RING_HALF);  in sca3000_hw_ring_postdisable()
1369 	mutex_unlock(&st->lock);  in sca3000_hw_ring_postdisable()
1380  * @st: Device instance specific private data structure
1386 static int sca3000_clean_setup(struct sca3000_state *st)  in sca3000_clean_setup()  argument
1390 	mutex_lock(&st->lock);  in sca3000_clean_setup()
1392 	ret = sca3000_read_data_short(st, SCA3000_REG_INT_STATUS_ADDR, 1);  in sca3000_clean_setup()
1397 	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL);  in sca3000_clean_setup()
1400 	ret = sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL,  in sca3000_clean_setup()
1406 	ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL);  in sca3000_clean_setup()
1409 	ret = sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL,  in sca3000_clean_setup()
1418 	ret = sca3000_read_data_short(st, SCA3000_REG_INT_MASK_ADDR, 1);  in sca3000_clean_setup()
1421 	ret = sca3000_write_reg(st,  in sca3000_clean_setup()
1432 	ret = sca3000_read_data_short(st, SCA3000_REG_MODE_ADDR, 1);  in sca3000_clean_setup()
1435 	ret = sca3000_write_reg(st, SCA3000_REG_MODE_ADDR,  in sca3000_clean_setup()
1436 				(st->rx[0] & SCA3000_MODE_PROT_MASK));  in sca3000_clean_setup()
1439 	mutex_unlock(&st->lock);  in sca3000_clean_setup()
1456 	struct sca3000_state *st;  in sca3000_probe()  local
1459 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in sca3000_probe()
1463 	st = iio_priv(indio_dev);  in sca3000_probe()
1465 	st->us = spi;  in sca3000_probe()
1466 	mutex_init(&st->lock);  in sca3000_probe()
1467 	st->info = &sca3000_spi_chip_info_tbl[spi_get_device_id(spi)  in sca3000_probe()
1472 	if (st->info->temp_output) {  in sca3000_probe()
1497 	ret = sca3000_clean_setup(st);  in sca3000_probe()
1514 static int sca3000_stop_all_interrupts(struct sca3000_state *st)  in sca3000_stop_all_interrupts()  argument
1518 	mutex_lock(&st->lock);  in sca3000_stop_all_interrupts()
1519 	ret = sca3000_read_data_short(st, SCA3000_REG_INT_MASK_ADDR, 1);  in sca3000_stop_all_interrupts()
1522 	ret = sca3000_write_reg(st, SCA3000_REG_INT_MASK_ADDR,  in sca3000_stop_all_interrupts()
1523 				(st->rx[0] &  in sca3000_stop_all_interrupts()
1528 	mutex_unlock(&st->lock);  in sca3000_stop_all_interrupts()
1535 	struct sca3000_state *st = iio_priv(indio_dev);  in sca3000_remove()  local
1540 	sca3000_stop_all_interrupts(st);  in sca3000_remove()