[linux-2.6-block.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, 14),
	ADIS_TEMP_CHAN(ADIS16209_TEMP_OUT, ADIS16209_SCAN_TEMP, 12),
	ADIS_ACCEL_CHAN(X, ADIS16209_XACCL_OUT, ADIS16209_SCAN_ACC_X,
		IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, 14),
	ADIS_ACCEL_CHAN(Y, ADIS16209_YACCL_OUT, ADIS16209_SCAN_ACC_Y,
		IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, 14),
	ADIS_AUX_ADC_CHAN(ADIS16209_AUX_ADC, ADIS16209_SCAN_AUX_ADC, 12),
	ADIS_INCLI_CHAN(X, ADIS16209_XINCL_OUT, ADIS16209_SCAN_INCLI_X, 0, 14),
	ADIS_INCLI_CHAN(Y, ADIS16209_YINCL_OUT, ADIS16209_SCAN_INCLI_Y, 0, 14),
	ADIS_ROT_CHAN(X, ADIS16209_ROT_OUT, ADIS16209_SCAN_ROT, 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,
	.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 = iio_device_alloc(sizeof(*st));
	if (indio_dev == NULL) {
		ret = -ENOMEM;
		goto error_ret;
	}
	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)
		goto error_free_dev;
	ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL);
	if (ret)
		goto error_free_dev;

	/* 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);
error_free_dev:
	iio_device_free(indio_dev);
error_ret:
	return ret;
}

static int __devexit 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);
	iio_device_free(indio_dev);

	return 0;
}

static struct spi_driver adis16209_driver = {
	.driver = {
		.name = "adis16209",
		.owner = THIS_MODULE,
	},
	.probe = adis16209_probe,
	.remove = __devexit_p(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;
	47	switch (mask) {
c8a9f805	48	case IIO_CHAN_INFO_CALIBBIAS:
a34c26dc JC	49	switch (chan->type) {
	50	case IIO_ACCEL:
	51	case IIO_INCLI:
	52	bits = 14;
	53	break;
	54	default:
	55	return -EINVAL;
73327b4c	56	}
a34c26dc	57	val16 = val & ((1 << bits) - 1);
511fb29e LPC	58	addr = adis16209_addresses[chan->scan_index][0];
511fb29e LPC	59	return adis_write_reg_16(st, addr, val16);
a34c26dc JC	60	}
	61	return -EINVAL;
	62	}
	63
	64	static int adis16209_read_raw(struct iio_dev *indio_dev,
	65	struct iio_chan_spec const *chan,
	66	int val, int val2,
	67	long mask)
	68	{
511fb29e	69	struct adis *st = iio_priv(indio_dev);
a34c26dc JC	70	int ret;
	71	int bits;
	72	u8 addr;
	73	s16 val16;
	74
	75	switch (mask) {
31313fc6	76	case IIO_CHAN_INFO_RAW:
511fb29e LPC	77	return adis_single_conversion(indio_dev, chan,
511fb29e LPC	78	ADIS16209_ERROR_ACTIVE, val);
c8a9f805	79	case IIO_CHAN_INFO_SCALE:
a34c26dc	80	switch (chan->type) {
6835cb6b	81	case IIO_VOLTAGE:
a34c26dc JC	82	*val = 0;
a34c26dc JC	83	if (chan->channel == 0)
d5304b77	84	val2 = 305180; / 0.30518 mV */
a34c26dc	85	else
d5304b77	86	val2 = 610500; / 0.6105 mV */
a34c26dc JC	87	return IIO_VAL_INT_PLUS_MICRO;
a34c26dc JC	88	case IIO_TEMP:
d5304b77 LPC	89	val = -470; / -0.47 C */
d5304b77 LPC	90	*val2 = 0;
a34c26dc JC	91	return IIO_VAL_INT_PLUS_MICRO;
	92	case IIO_ACCEL:
	93	*val = 0;
d5304b77 LPC	94	val2 = IIO_G_TO_M_S_2(244140); / 0.244140 mg */
d5304b77 LPC	95	return IIO_VAL_INT_PLUS_NANO;
a34c26dc	96	case IIO_INCLI:
d5304b77	97	case IIO_ROT:
a34c26dc	98	*val = 0;
d5304b77	99	val2 = 25000; / 0.025 degree */
a34c26dc JC	100	return IIO_VAL_INT_PLUS_MICRO;
	101	default:
	102	return -EINVAL;
	103	}
	104	break;
c8a9f805	105	case IIO_CHAN_INFO_OFFSET:
d5304b77	106	val = 25000 / -470 - 0x4FE; / 25 C = 0x4FE */
a34c26dc	107	return IIO_VAL_INT;
c8a9f805	108	case IIO_CHAN_INFO_CALIBBIAS:
a34c26dc JC	109	switch (chan->type) {
	110	case IIO_ACCEL:
	111	bits = 14;
	112	break;
	113	default:
	114	return -EINVAL;
73327b4c	115	}
a34c26dc	116	mutex_lock(&indio_dev->mlock);
511fb29e LPC	117	addr = adis16209_addresses[chan->scan_index][0];
511fb29e LPC	118	ret = adis_read_reg_16(st, addr, &val16);
a34c26dc JC	119	if (ret) {
	120	mutex_unlock(&indio_dev->mlock);
	121	return ret;
	122	}
	123	val16 &= (1 << bits) - 1;
	124	val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
	125	*val = val16;
	126	mutex_unlock(&indio_dev->mlock);
	127	return IIO_VAL_INT;
	128	}
	129	return -EINVAL;
	130	}
	131
f4e4b955	132	static const struct iio_chan_spec adis16209_channels[] = {
511fb29e LPC	133	ADIS_SUPPLY_CHAN(ADIS16209_SUPPLY_OUT, ADIS16209_SCAN_SUPPLY, 14),
	134	ADIS_TEMP_CHAN(ADIS16209_TEMP_OUT, ADIS16209_SCAN_TEMP, 12),
	135	ADIS_ACCEL_CHAN(X, ADIS16209_XACCL_OUT, ADIS16209_SCAN_ACC_X,
	136	IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, 14),
	137	ADIS_ACCEL_CHAN(Y, ADIS16209_YACCL_OUT, ADIS16209_SCAN_ACC_Y,
	138	IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, 14),
	139	ADIS_AUX_ADC_CHAN(ADIS16209_AUX_ADC, ADIS16209_SCAN_AUX_ADC, 12),
	140	ADIS_INCLI_CHAN(X, ADIS16209_XINCL_OUT, ADIS16209_SCAN_INCLI_X, 0, 14),
	141	ADIS_INCLI_CHAN(Y, ADIS16209_YINCL_OUT, ADIS16209_SCAN_INCLI_Y, 0, 14),
	142	ADIS_ROT_CHAN(X, ADIS16209_ROT_OUT, ADIS16209_SCAN_ROT, 0, 14),
a34c26dc JC	143	IIO_CHAN_SOFT_TIMESTAMP(8)
a34c26dc JC	144	};
671ece14	145
6fe8135f	146	static const struct iio_info adis16209_info = {
6fe8135f JC	147	.read_raw = &adis16209_read_raw,
6fe8135f JC	148	.write_raw = &adis16209_write_raw,
aacff892	149	.update_scan_mode = adis_update_scan_mode,
6fe8135f JC	150	.driver_module = THIS_MODULE,
	151	};
	152
511fb29e LPC	153	static const char * const adis16209_status_error_msgs[] = {
	154	[ADIS16209_DIAG_STAT_SELFTEST_FAIL_BIT] = "Self test failure",
	155	[ADIS16209_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
	156	[ADIS16209_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
	157	[ADIS16209_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
	158	[ADIS16209_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 3.15V",
	159	};
	160
	161	static const struct adis_data adis16209_data = {
	162	.read_delay = 30,
	163	.msc_ctrl_reg = ADIS16209_MSC_CTRL,
	164	.glob_cmd_reg = ADIS16209_GLOB_CMD,
	165	.diag_stat_reg = ADIS16209_DIAG_STAT,
	166
	167	.self_test_mask = ADIS16209_MSC_CTRL_SELF_TEST_EN,
	168	.startup_delay = ADIS16209_STARTUP_DELAY,
	169
	170	.status_error_msgs = adis16209_status_error_msgs,
	171	.status_error_mask = BIT(ADIS16209_DIAG_STAT_SELFTEST_FAIL_BIT) \|
	172	BIT(ADIS16209_DIAG_STAT_SPI_FAIL_BIT) \|
	173	BIT(ADIS16209_DIAG_STAT_FLASH_UPT_BIT) \|
	174	BIT(ADIS16209_DIAG_STAT_POWER_HIGH_BIT) \|
	175	BIT(ADIS16209_DIAG_STAT_POWER_LOW_BIT),
	176	};
	177
	178
4ae1c61f	179	static int adis16209_probe(struct spi_device *spi)
671ece14	180	{
26d25ae3	181	int ret;
511fb29e	182	struct adis *st;
35212dfa	183	struct iio_dev *indio_dev;
671ece14	184
35212dfa	185	/* setup the industrialio driver allocated elements */
7cbb7537	186	indio_dev = iio_device_alloc(sizeof(*st));
35212dfa	187	if (indio_dev == NULL) {
671ece14	188	ret = -ENOMEM;
35212dfa	189	goto error_ret;
671ece14	190	}
35212dfa JC	191	st = iio_priv(indio_dev);
	192	/* this is only used for removal purposes */
	193	spi_set_drvdata(spi, indio_dev);
671ece14	194
35212dfa JC	195	indio_dev->name = spi->dev.driver->name;
	196	indio_dev->dev.parent = &spi->dev;
	197	indio_dev->info = &adis16209_info;
	198	indio_dev->channels = adis16209_channels;
	199	indio_dev->num_channels = ARRAY_SIZE(adis16209_channels);
	200	indio_dev->modes = INDIO_DIRECT_MODE;
671ece14	201
511fb29e LPC	202	ret = adis_init(st, indio_dev, spi, &adis16209_data);
	203	if (ret)
	204	goto error_free_dev;
	205	ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL);
671ece14 BS	206	if (ret)
671ece14 BS	207	goto error_free_dev;
671ece14 BS	208
671ece14 BS	209	/* Get the device into a sane initial state */
511fb29e	210	ret = adis_initial_startup(st);
671ece14	211	if (ret)
511fb29e	212	goto error_cleanup_buffer_trigger;
26d25ae3 JC	213	ret = iio_device_register(indio_dev);
26d25ae3 JC	214	if (ret)
511fb29e	215	goto error_cleanup_buffer_trigger;
26d25ae3	216
671ece14 BS	217	return 0;
671ece14 BS	218
511fb29e LPC	219	error_cleanup_buffer_trigger:
511fb29e LPC	220	adis_cleanup_buffer_and_trigger(st, indio_dev);
671ece14	221	error_free_dev:
7cbb7537	222	iio_device_free(indio_dev);
671ece14 BS	223	error_ret:
	224	return ret;
	225	}
	226
8e828752	227	static int __devexit adis16209_remove(struct spi_device *spi)
671ece14	228	{
35212dfa	229	struct iio_dev *indio_dev = spi_get_drvdata(spi);
511fb29e	230	struct adis *st = iio_priv(indio_dev);
671ece14	231
d2fffd6c	232	iio_device_unregister(indio_dev);
511fb29e	233	adis_cleanup_buffer_and_trigger(st, indio_dev);
7cbb7537	234	iio_device_free(indio_dev);
671ece14 BS	235
	236	return 0;
	237	}
	238
	239	static struct spi_driver adis16209_driver = {
	240	.driver = {
	241	.name = "adis16209",
	242	.owner = THIS_MODULE,
	243	},
	244	.probe = adis16209_probe,
	245	.remove = __devexit_p(adis16209_remove),
	246	};
ae6ae6fe	247	module_spi_driver(adis16209_driver);
671ece14 BS	248
	249	MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
	250	MODULE_DESCRIPTION("Analog Devices ADIS16209 Digital Vibration Sensor driver");
	251	MODULE_LICENSE("GPL v2");
55e4390c	252	MODULE_ALIAS("spi:adis16209");