[mirror_ubuntu-zesty-kernel.git] / drivers / staging / iio / accel / adis16209_core.c

/*
 * ADIS16209 Programmable Digital Vibration Sensor driver
 *
 * Copyright 2010 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/list.h>
#include <linux/module.h>

#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
#include <linux/iio/imu/adis.h>

#include "adis16209.h"

static const u8 adis16209_addresses[8][1] = {
	[ADIS16209_SCAN_SUPPLY] = { },
	[ADIS16209_SCAN_AUX_ADC] = { },
	[ADIS16209_SCAN_ACC_X] = { ADIS16209_XACCL_NULL },
	[ADIS16209_SCAN_ACC_Y] = { ADIS16209_YACCL_NULL },
	[ADIS16209_SCAN_INCLI_X] = { ADIS16209_XINCL_NULL },
	[ADIS16209_SCAN_INCLI_Y] = { ADIS16209_YINCL_NULL },
	[ADIS16209_SCAN_ROT] = { },
	[ADIS16209_SCAN_TEMP] = { },
};

static int adis16209_write_raw(struct iio_dev *indio_dev,
			       struct iio_chan_spec const *chan,
			       int val,
			       int val2,
			       long mask)
{
	struct adis *st = iio_priv(indio_dev);
	int bits;
	s16 val16;
	u8 addr;

	switch (mask) {
	case IIO_CHAN_INFO_CALIBBIAS:
		switch (chan->type) {
		case IIO_ACCEL:
		case IIO_INCLI:
			bits = 14;
			break;
		default:
			return -EINVAL;
		}
		val16 = val & ((1 << bits) - 1);
		addr = adis16209_addresses[chan->scan_index][0];
		return adis_write_reg_16(st, addr, val16);
	}
	return -EINVAL;
}

static int adis16209_read_raw(struct iio_dev *indio_dev,
			      struct iio_chan_spec const *chan,
			      int *val, int *val2,
			      long mask)
{
	struct adis *st = iio_priv(indio_dev);
	int ret;
	int bits;
	u8 addr;
	s16 val16;

	switch (mask) {
	case IIO_CHAN_INFO_RAW:
		return adis_single_conversion(indio_dev, chan,
			ADIS16209_ERROR_ACTIVE, val);
	case IIO_CHAN_INFO_SCALE:
		switch (chan->type) {
		case IIO_VOLTAGE:
			*val = 0;
			if (chan->channel == 0)
				*val2 = 305180; /* 0.30518 mV */
			else
				*val2 = 610500; /* 0.6105 mV */
			return IIO_VAL_INT_PLUS_MICRO;
		case IIO_TEMP:
			*val = -470; /* -0.47 C */
			*val2 = 0;
			return IIO_VAL_INT_PLUS_MICRO;
		case IIO_ACCEL:
			*val = 0;
			*val2 = IIO_G_TO_M_S_2(244140); /* 0.244140 mg */
			return IIO_VAL_INT_PLUS_NANO;
		case IIO_INCLI:
		case IIO_ROT:
			*val = 0;
			*val2 = 25000; /* 0.025 degree */
			return IIO_VAL_INT_PLUS_MICRO;
		default:
			return -EINVAL;
		}
		break;
	case IIO_CHAN_INFO_OFFSET:
		*val = 25000 / -470 - 0x4FE; /* 25 C = 0x4FE */
		return IIO_VAL_INT;
	case IIO_CHAN_INFO_CALIBBIAS:
		switch (chan->type) {
		case IIO_ACCEL:
			bits = 14;
			break;
		default:
			return -EINVAL;
		}
		mutex_lock(&indio_dev->mlock);
		addr = adis16209_addresses[chan->scan_index][0];
		ret = adis_read_reg_16(st, addr, &val16);
		if (ret) {
			mutex_unlock(&indio_dev->mlock);
			return ret;
		}
		val16 &= (1 << bits) - 1;
		val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
		*val = val16;
		mutex_unlock(&indio_dev->mlock);
		return IIO_VAL_INT;
	}
	return -EINVAL;
}

static const struct iio_chan_spec adis16209_channels[] = {
	ADIS_SUPPLY_CHAN(ADIS16209_SUPPLY_OUT, ADIS16209_SCAN_SUPPLY, 0, 14),
	ADIS_TEMP_CHAN(ADIS16209_TEMP_OUT, ADIS16209_SCAN_TEMP, 0, 12),
	ADIS_ACCEL_CHAN(X, ADIS16209_XACCL_OUT, ADIS16209_SCAN_ACC_X,
			BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
	ADIS_ACCEL_CHAN(Y, ADIS16209_YACCL_OUT, ADIS16209_SCAN_ACC_Y,
			BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
	ADIS_AUX_ADC_CHAN(ADIS16209_AUX_ADC, ADIS16209_SCAN_AUX_ADC, 0, 12),
	ADIS_INCLI_CHAN(X, ADIS16209_XINCL_OUT, ADIS16209_SCAN_INCLI_X,
			0, 0, 14),
	ADIS_INCLI_CHAN(Y, ADIS16209_YINCL_OUT, ADIS16209_SCAN_INCLI_Y,
			0, 0, 14),
	ADIS_ROT_CHAN(X, ADIS16209_ROT_OUT, ADIS16209_SCAN_ROT, 0, 0, 14),
	IIO_CHAN_SOFT_TIMESTAMP(8)
};

static const struct iio_info adis16209_info = {
	.read_raw = &adis16209_read_raw,
	.write_raw = &adis16209_write_raw,
	.update_scan_mode = adis_update_scan_mode,
	.driver_module = THIS_MODULE,
};

static const char * const adis16209_status_error_msgs[] = {
	[ADIS16209_DIAG_STAT_SELFTEST_FAIL_BIT] = "Self test failure",
	[ADIS16209_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
	[ADIS16209_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
	[ADIS16209_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
	[ADIS16209_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 3.15V",
};

static const struct adis_data adis16209_data = {
	.read_delay = 30,
	.msc_ctrl_reg = ADIS16209_MSC_CTRL,
	.glob_cmd_reg = ADIS16209_GLOB_CMD,
	.diag_stat_reg = ADIS16209_DIAG_STAT,

	.self_test_mask = ADIS16209_MSC_CTRL_SELF_TEST_EN,
	.self_test_no_autoclear = true,
	.startup_delay = ADIS16209_STARTUP_DELAY,

	.status_error_msgs = adis16209_status_error_msgs,
	.status_error_mask = BIT(ADIS16209_DIAG_STAT_SELFTEST_FAIL_BIT) |
		BIT(ADIS16209_DIAG_STAT_SPI_FAIL_BIT) |
		BIT(ADIS16209_DIAG_STAT_FLASH_UPT_BIT) |
		BIT(ADIS16209_DIAG_STAT_POWER_HIGH_BIT) |
		BIT(ADIS16209_DIAG_STAT_POWER_LOW_BIT),
};

static int adis16209_probe(struct spi_device *spi)
{
	int ret;
	struct adis *st;
	struct iio_dev *indio_dev;

	/* setup the industrialio driver allocated elements */
	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
	if (!indio_dev)
		return -ENOMEM;
	st = iio_priv(indio_dev);
	/* this is only used for removal purposes */
	spi_set_drvdata(spi, indio_dev);

	indio_dev->name = spi->dev.driver->name;
	indio_dev->dev.parent = &spi->dev;
	indio_dev->info = &adis16209_info;
	indio_dev->channels = adis16209_channels;
	indio_dev->num_channels = ARRAY_SIZE(adis16209_channels);
	indio_dev->modes = INDIO_DIRECT_MODE;

	ret = adis_init(st, indio_dev, spi, &adis16209_data);
	if (ret)
		return ret;
	ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL);
	if (ret)
		return ret;

	/* Get the device into a sane initial state */
	ret = adis_initial_startup(st);
	if (ret)
		goto error_cleanup_buffer_trigger;
	ret = iio_device_register(indio_dev);
	if (ret)
		goto error_cleanup_buffer_trigger;

	return 0;

error_cleanup_buffer_trigger:
	adis_cleanup_buffer_and_trigger(st, indio_dev);
	return ret;
}

static int adis16209_remove(struct spi_device *spi)
{
	struct iio_dev *indio_dev = spi_get_drvdata(spi);
	struct adis *st = iio_priv(indio_dev);

	iio_device_unregister(indio_dev);
	adis_cleanup_buffer_and_trigger(st, indio_dev);

	return 0;
}

static struct spi_driver adis16209_driver = {
	.driver = {
		.name = "adis16209",
	},
	.probe = adis16209_probe,
	.remove = adis16209_remove,
};
module_spi_driver(adis16209_driver);

MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
MODULE_DESCRIPTION("Analog Devices ADIS16209 Digital Vibration Sensor driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("spi:adis16209");
Commit	Line	Data
671ece14 BS	1	/*
	2	* ADIS16209 Programmable Digital Vibration Sensor driver
	3	*
	4	* Copyright 2010 Analog Devices Inc.
	5	*
	6	* Licensed under the GPL-2 or later.
	7	*/
	8
671ece14 BS	9	#include <linux/delay.h>
	10	#include <linux/mutex.h>
	11	#include <linux/device.h>
	12	#include <linux/kernel.h>
	13	#include <linux/spi/spi.h>
1cb6c1f5	14	#include <linux/slab.h>
671ece14 BS	15	#include <linux/sysfs.h>
671ece14 BS	16	#include <linux/list.h>
99c97852	17	#include <linux/module.h>
671ece14	18
06458e27 JC	19	#include <linux/iio/iio.h>
	20	#include <linux/iio/sysfs.h>
	21	#include <linux/iio/buffer.h>
ec04cb04	22	#include <linux/iio/imu/adis.h>
671ece14 BS	23
671ece14 BS	24	#include "adis16209.h"
511fb29e LPC	25
	26	static const u8 adis16209_addresses[8][1] = {
	27	[ADIS16209_SCAN_SUPPLY] = { },
	28	[ADIS16209_SCAN_AUX_ADC] = { },
	29	[ADIS16209_SCAN_ACC_X] = { ADIS16209_XACCL_NULL },
	30	[ADIS16209_SCAN_ACC_Y] = { ADIS16209_YACCL_NULL },
	31	[ADIS16209_SCAN_INCLI_X] = { ADIS16209_XINCL_NULL },
	32	[ADIS16209_SCAN_INCLI_Y] = { ADIS16209_YINCL_NULL },
	33	[ADIS16209_SCAN_ROT] = { },
	34	[ADIS16209_SCAN_TEMP] = { },
a34c26dc JC	35	};
	36
	37	static int adis16209_write_raw(struct iio_dev *indio_dev,
	38	struct iio_chan_spec const *chan,
	39	int val,
	40	int val2,
	41	long mask)
	42	{
511fb29e	43	struct adis *st = iio_priv(indio_dev);
a34c26dc JC	44	int bits;
	45	s16 val16;
	46	u8 addr;
d7b79519	47
a34c26dc	48	switch (mask) {
c8a9f805	49	case IIO_CHAN_INFO_CALIBBIAS:
a34c26dc JC	50	switch (chan->type) {
	51	case IIO_ACCEL:
	52	case IIO_INCLI:
	53	bits = 14;
	54	break;
	55	default:
	56	return -EINVAL;
73327b4c	57	}
a34c26dc	58	val16 = val & ((1 << bits) - 1);
511fb29e LPC	59	addr = adis16209_addresses[chan->scan_index][0];
511fb29e LPC	60	return adis_write_reg_16(st, addr, val16);
a34c26dc JC	61	}
	62	return -EINVAL;
	63	}
	64
	65	static int adis16209_read_raw(struct iio_dev *indio_dev,
	66	struct iio_chan_spec const *chan,
	67	int val, int val2,
	68	long mask)
	69	{
511fb29e	70	struct adis *st = iio_priv(indio_dev);
a34c26dc JC	71	int ret;
	72	int bits;
	73	u8 addr;
	74	s16 val16;
	75
	76	switch (mask) {
31313fc6	77	case IIO_CHAN_INFO_RAW:
511fb29e LPC	78	return adis_single_conversion(indio_dev, chan,
511fb29e LPC	79	ADIS16209_ERROR_ACTIVE, val);
c8a9f805	80	case IIO_CHAN_INFO_SCALE:
a34c26dc	81	switch (chan->type) {
6835cb6b	82	case IIO_VOLTAGE:
a34c26dc JC	83	*val = 0;
a34c26dc JC	84	if (chan->channel == 0)
d5304b77	85	val2 = 305180; / 0.30518 mV */
a34c26dc	86	else
d5304b77	87	val2 = 610500; / 0.6105 mV */
a34c26dc JC	88	return IIO_VAL_INT_PLUS_MICRO;
a34c26dc JC	89	case IIO_TEMP:
d5304b77 LPC	90	val = -470; / -0.47 C */
d5304b77 LPC	91	*val2 = 0;
a34c26dc JC	92	return IIO_VAL_INT_PLUS_MICRO;
	93	case IIO_ACCEL:
	94	*val = 0;
d5304b77 LPC	95	val2 = IIO_G_TO_M_S_2(244140); / 0.244140 mg */
d5304b77 LPC	96	return IIO_VAL_INT_PLUS_NANO;
a34c26dc	97	case IIO_INCLI:
d5304b77	98	case IIO_ROT:
a34c26dc	99	*val = 0;
d5304b77	100	val2 = 25000; / 0.025 degree */
a34c26dc JC	101	return IIO_VAL_INT_PLUS_MICRO;
	102	default:
	103	return -EINVAL;
	104	}
	105	break;
c8a9f805	106	case IIO_CHAN_INFO_OFFSET:
d5304b77	107	val = 25000 / -470 - 0x4FE; / 25 C = 0x4FE */
a34c26dc	108	return IIO_VAL_INT;
c8a9f805	109	case IIO_CHAN_INFO_CALIBBIAS:
a34c26dc JC	110	switch (chan->type) {
	111	case IIO_ACCEL:
	112	bits = 14;
	113	break;
	114	default:
	115	return -EINVAL;
73327b4c	116	}
a34c26dc	117	mutex_lock(&indio_dev->mlock);
511fb29e LPC	118	addr = adis16209_addresses[chan->scan_index][0];
511fb29e LPC	119	ret = adis_read_reg_16(st, addr, &val16);
a34c26dc JC	120	if (ret) {
	121	mutex_unlock(&indio_dev->mlock);
	122	return ret;
	123	}
	124	val16 &= (1 << bits) - 1;
	125	val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
	126	*val = val16;
	127	mutex_unlock(&indio_dev->mlock);
	128	return IIO_VAL_INT;
	129	}
	130	return -EINVAL;
	131	}
	132
f4e4b955	133	static const struct iio_chan_spec adis16209_channels[] = {
82695ef5 JC	134	ADIS_SUPPLY_CHAN(ADIS16209_SUPPLY_OUT, ADIS16209_SCAN_SUPPLY, 0, 14),
82695ef5 JC	135	ADIS_TEMP_CHAN(ADIS16209_TEMP_OUT, ADIS16209_SCAN_TEMP, 0, 12),
511fb29e	136	ADIS_ACCEL_CHAN(X, ADIS16209_XACCL_OUT, ADIS16209_SCAN_ACC_X,
9963bce7	137	BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
511fb29e	138	ADIS_ACCEL_CHAN(Y, ADIS16209_YACCL_OUT, ADIS16209_SCAN_ACC_Y,
9963bce7	139	BIT(IIO_CHAN_INFO_CALIBBIAS), 0, 14),
82695ef5 JC	140	ADIS_AUX_ADC_CHAN(ADIS16209_AUX_ADC, ADIS16209_SCAN_AUX_ADC, 0, 12),
82695ef5 JC	141	ADIS_INCLI_CHAN(X, ADIS16209_XINCL_OUT, ADIS16209_SCAN_INCLI_X,
9963bce7	142	0, 0, 14),
82695ef5	143	ADIS_INCLI_CHAN(Y, ADIS16209_YINCL_OUT, ADIS16209_SCAN_INCLI_Y,
9963bce7	144	0, 0, 14),
82695ef5	145	ADIS_ROT_CHAN(X, ADIS16209_ROT_OUT, ADIS16209_SCAN_ROT, 0, 0, 14),
a34c26dc JC	146	IIO_CHAN_SOFT_TIMESTAMP(8)
a34c26dc JC	147	};
671ece14	148
6fe8135f	149	static const struct iio_info adis16209_info = {
6fe8135f JC	150	.read_raw = &adis16209_read_raw,
6fe8135f JC	151	.write_raw = &adis16209_write_raw,
aacff892	152	.update_scan_mode = adis_update_scan_mode,
6fe8135f JC	153	.driver_module = THIS_MODULE,
	154	};
	155
511fb29e LPC	156	static const char * const adis16209_status_error_msgs[] = {
	157	[ADIS16209_DIAG_STAT_SELFTEST_FAIL_BIT] = "Self test failure",
	158	[ADIS16209_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
	159	[ADIS16209_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
	160	[ADIS16209_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
	161	[ADIS16209_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 3.15V",
	162	};
	163
	164	static const struct adis_data adis16209_data = {
	165	.read_delay = 30,
	166	.msc_ctrl_reg = ADIS16209_MSC_CTRL,
	167	.glob_cmd_reg = ADIS16209_GLOB_CMD,
	168	.diag_stat_reg = ADIS16209_DIAG_STAT,
	169
	170	.self_test_mask = ADIS16209_MSC_CTRL_SELF_TEST_EN,
5d116edd	171	.self_test_no_autoclear = true,
511fb29e LPC	172	.startup_delay = ADIS16209_STARTUP_DELAY,
	173
	174	.status_error_msgs = adis16209_status_error_msgs,
	175	.status_error_mask = BIT(ADIS16209_DIAG_STAT_SELFTEST_FAIL_BIT) \|
	176	BIT(ADIS16209_DIAG_STAT_SPI_FAIL_BIT) \|
	177	BIT(ADIS16209_DIAG_STAT_FLASH_UPT_BIT) \|
	178	BIT(ADIS16209_DIAG_STAT_POWER_HIGH_BIT) \|
	179	BIT(ADIS16209_DIAG_STAT_POWER_LOW_BIT),
	180	};
	181
4ae1c61f	182	static int adis16209_probe(struct spi_device *spi)
671ece14	183	{
26d25ae3	184	int ret;
511fb29e	185	struct adis *st;
35212dfa	186	struct iio_dev *indio_dev;
671ece14	187
35212dfa	188	/* setup the industrialio driver allocated elements */
864bf5cd SK	189	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
	190	if (!indio_dev)
	191	return -ENOMEM;
35212dfa JC	192	st = iio_priv(indio_dev);
	193	/* this is only used for removal purposes */
	194	spi_set_drvdata(spi, indio_dev);
671ece14	195
35212dfa JC	196	indio_dev->name = spi->dev.driver->name;
	197	indio_dev->dev.parent = &spi->dev;
	198	indio_dev->info = &adis16209_info;
	199	indio_dev->channels = adis16209_channels;
	200	indio_dev->num_channels = ARRAY_SIZE(adis16209_channels);
	201	indio_dev->modes = INDIO_DIRECT_MODE;
671ece14	202
511fb29e LPC	203	ret = adis_init(st, indio_dev, spi, &adis16209_data);
511fb29e LPC	204	if (ret)
864bf5cd	205	return ret;
511fb29e	206	ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL);
671ece14	207	if (ret)
864bf5cd	208	return ret;
671ece14 BS	209
671ece14 BS	210	/* Get the device into a sane initial state */
511fb29e	211	ret = adis_initial_startup(st);
671ece14	212	if (ret)
511fb29e	213	goto error_cleanup_buffer_trigger;
26d25ae3 JC	214	ret = iio_device_register(indio_dev);
26d25ae3 JC	215	if (ret)
511fb29e	216	goto error_cleanup_buffer_trigger;
26d25ae3	217
671ece14 BS	218	return 0;
671ece14 BS	219
511fb29e LPC	220	error_cleanup_buffer_trigger:
511fb29e LPC	221	adis_cleanup_buffer_and_trigger(st, indio_dev);
671ece14 BS	222	return ret;
	223	}
	224
447d4f29	225	static int adis16209_remove(struct spi_device *spi)
671ece14	226	{
35212dfa	227	struct iio_dev *indio_dev = spi_get_drvdata(spi);
511fb29e	228	struct adis *st = iio_priv(indio_dev);
671ece14	229
d2fffd6c	230	iio_device_unregister(indio_dev);
511fb29e	231	adis_cleanup_buffer_and_trigger(st, indio_dev);
671ece14 BS	232
	233	return 0;
	234	}
	235
	236	static struct spi_driver adis16209_driver = {
	237	.driver = {
	238	.name = "adis16209",
671ece14 BS	239	},
671ece14 BS	240	.probe = adis16209_probe,
e543acf0	241	.remove = adis16209_remove,
671ece14	242	};
ae6ae6fe	243	module_spi_driver(adis16209_driver);
671ece14 BS	244
	245	MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
	246	MODULE_DESCRIPTION("Analog Devices ADIS16209 Digital Vibration Sensor driver");
	247	MODULE_LICENSE("GPL v2");
55e4390c	248	MODULE_ALIAS("spi:adis16209");