[linux-2.6-block.git] / drivers / input / misc / bma150.c

/*
 * Copyright (c) 2011 Bosch Sensortec GmbH
 * Copyright (c) 2011 Unixphere
 *
 * This driver adds support for Bosch Sensortec's digital acceleration
 * sensors BMA150 and SMB380.
 * The SMB380 is fully compatible with BMA150 and only differs in packaging.
 *
 * The datasheet for the BMA150 chip can be found here:
 * http://www.bosch-sensortec.com/content/language1/downloads/BST-BMA150-DS000-07.pdf
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input-polldev.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/bma150.h>

#define ABSMAX_ACC_VAL		0x01FF
#define ABSMIN_ACC_VAL		-(ABSMAX_ACC_VAL)

/* Each axis is represented by a 2-byte data word */
#define BMA150_XYZ_DATA_SIZE	6

/* Input poll interval in milliseconds */
#define BMA150_POLL_INTERVAL	10
#define BMA150_POLL_MAX		200
#define BMA150_POLL_MIN		0

#define BMA150_MODE_NORMAL	0
#define BMA150_MODE_SLEEP	2
#define BMA150_MODE_WAKE_UP	3

/* Data register addresses */
#define BMA150_DATA_0_REG	0x00
#define BMA150_DATA_1_REG	0x01
#define BMA150_DATA_2_REG	0x02

/* Control register addresses */
#define BMA150_CTRL_0_REG	0x0A
#define BMA150_CTRL_1_REG	0x0B
#define BMA150_CTRL_2_REG	0x14
#define BMA150_CTRL_3_REG	0x15

/* Configuration/Setting register addresses */
#define BMA150_CFG_0_REG	0x0C
#define BMA150_CFG_1_REG	0x0D
#define BMA150_CFG_2_REG	0x0E
#define BMA150_CFG_3_REG	0x0F
#define BMA150_CFG_4_REG	0x10
#define BMA150_CFG_5_REG	0x11

#define BMA150_CHIP_ID		2
#define BMA180_CHIP_ID		3
#define BMA150_CHIP_ID_REG	BMA150_DATA_0_REG

#define BMA150_ACC_X_LSB_REG	BMA150_DATA_2_REG

#define BMA150_SLEEP_POS	0
#define BMA150_SLEEP_MSK	0x01
#define BMA150_SLEEP_REG	BMA150_CTRL_0_REG

#define BMA150_BANDWIDTH_POS	0
#define BMA150_BANDWIDTH_MSK	0x07
#define BMA150_BANDWIDTH_REG	BMA150_CTRL_2_REG

#define BMA150_RANGE_POS	3
#define BMA150_RANGE_MSK	0x18
#define BMA150_RANGE_REG	BMA150_CTRL_2_REG

#define BMA150_WAKE_UP_POS	0
#define BMA150_WAKE_UP_MSK	0x01
#define BMA150_WAKE_UP_REG	BMA150_CTRL_3_REG

#define BMA150_SW_RES_POS	1
#define BMA150_SW_RES_MSK	0x02
#define BMA150_SW_RES_REG	BMA150_CTRL_0_REG

/* Any-motion interrupt register fields */
#define BMA150_ANY_MOTION_EN_POS	6
#define BMA150_ANY_MOTION_EN_MSK	0x40
#define BMA150_ANY_MOTION_EN_REG	BMA150_CTRL_1_REG

#define BMA150_ANY_MOTION_DUR_POS	6
#define BMA150_ANY_MOTION_DUR_MSK	0xC0
#define BMA150_ANY_MOTION_DUR_REG	BMA150_CFG_5_REG

#define BMA150_ANY_MOTION_THRES_REG	BMA150_CFG_4_REG

/* Advanced interrupt register fields */
#define BMA150_ADV_INT_EN_POS		6
#define BMA150_ADV_INT_EN_MSK		0x40
#define BMA150_ADV_INT_EN_REG		BMA150_CTRL_3_REG

/* High-G interrupt register fields */
#define BMA150_HIGH_G_EN_POS		1
#define BMA150_HIGH_G_EN_MSK		0x02
#define BMA150_HIGH_G_EN_REG		BMA150_CTRL_1_REG

#define BMA150_HIGH_G_HYST_POS		3
#define BMA150_HIGH_G_HYST_MSK		0x38
#define BMA150_HIGH_G_HYST_REG		BMA150_CFG_5_REG

#define BMA150_HIGH_G_DUR_REG		BMA150_CFG_3_REG
#define BMA150_HIGH_G_THRES_REG		BMA150_CFG_2_REG

/* Low-G interrupt register fields */
#define BMA150_LOW_G_EN_POS		0
#define BMA150_LOW_G_EN_MSK		0x01
#define BMA150_LOW_G_EN_REG		BMA150_CTRL_1_REG

#define BMA150_LOW_G_HYST_POS		0
#define BMA150_LOW_G_HYST_MSK		0x07
#define BMA150_LOW_G_HYST_REG		BMA150_CFG_5_REG

#define BMA150_LOW_G_DUR_REG		BMA150_CFG_1_REG
#define BMA150_LOW_G_THRES_REG		BMA150_CFG_0_REG

struct bma150_data {
	struct i2c_client *client;
	struct input_polled_dev *input_polled;
	struct input_dev *input;
	u8 mode;
};

/*
 * The settings for the given range, bandwidth and interrupt features
 * are stated and verified by Bosch Sensortec where they are configured
 * to provide a generic sensitivity performance.
 */
static struct bma150_cfg default_cfg = {
	.any_motion_int = 1,
	.hg_int = 1,
	.lg_int = 1,
	.any_motion_dur = 0,
	.any_motion_thres = 0,
	.hg_hyst = 0,
	.hg_dur = 150,
	.hg_thres = 160,
	.lg_hyst = 0,
	.lg_dur = 150,
	.lg_thres = 20,
	.range = BMA150_RANGE_2G,
	.bandwidth = BMA150_BW_50HZ
};

static int bma150_write_byte(struct i2c_client *client, u8 reg, u8 val)
{
	s32 ret;

	/* As per specification, disable irq in between register writes */
	if (client->irq)
		disable_irq_nosync(client->irq);

	ret = i2c_smbus_write_byte_data(client, reg, val);

	if (client->irq)
		enable_irq(client->irq);

	return ret;
}

static int bma150_set_reg_bits(struct i2c_client *client,
					int val, int shift, u8 mask, u8 reg)
{
	int data;

	data = i2c_smbus_read_byte_data(client, reg);
	if (data < 0)
		return data;

	data = (data & ~mask) | ((val << shift) & mask);
	return bma150_write_byte(client, reg, data);
}

static int bma150_set_mode(struct bma150_data *bma150, u8 mode)
{
	int error;

	error = bma150_set_reg_bits(bma150->client, mode, BMA150_WAKE_UP_POS,
				BMA150_WAKE_UP_MSK, BMA150_WAKE_UP_REG);
	if (error)
		return error;

	error = bma150_set_reg_bits(bma150->client, mode, BMA150_SLEEP_POS,
				BMA150_SLEEP_MSK, BMA150_SLEEP_REG);
	if (error)
		return error;

	if (mode == BMA150_MODE_NORMAL)
		msleep(2);

	bma150->mode = mode;
	return 0;
}

static int bma150_soft_reset(struct bma150_data *bma150)
{
	int error;

	error = bma150_set_reg_bits(bma150->client, 1, BMA150_SW_RES_POS,
				BMA150_SW_RES_MSK, BMA150_SW_RES_REG);
	if (error)
		return error;

	msleep(2);
	return 0;
}

static int bma150_set_range(struct bma150_data *bma150, u8 range)
{
	return bma150_set_reg_bits(bma150->client, range, BMA150_RANGE_POS,
				BMA150_RANGE_MSK, BMA150_RANGE_REG);
}

static int bma150_set_bandwidth(struct bma150_data *bma150, u8 bw)
{
	return bma150_set_reg_bits(bma150->client, bw, BMA150_BANDWIDTH_POS,
				BMA150_BANDWIDTH_MSK, BMA150_BANDWIDTH_REG);
}

static int bma150_set_low_g_interrupt(struct bma150_data *bma150,
					u8 enable, u8 hyst, u8 dur, u8 thres)
{
	int error;

	error = bma150_set_reg_bits(bma150->client, hyst,
				BMA150_LOW_G_HYST_POS, BMA150_LOW_G_HYST_MSK,
				BMA150_LOW_G_HYST_REG);
	if (error)
		return error;

	error = bma150_write_byte(bma150->client, BMA150_LOW_G_DUR_REG, dur);
	if (error)
		return error;

	error = bma150_write_byte(bma150->client, BMA150_LOW_G_THRES_REG, thres);
	if (error)
		return error;

	return bma150_set_reg_bits(bma150->client, !!enable,
				BMA150_LOW_G_EN_POS, BMA150_LOW_G_EN_MSK,
				BMA150_LOW_G_EN_REG);
}

static int bma150_set_high_g_interrupt(struct bma150_data *bma150,
					u8 enable, u8 hyst, u8 dur, u8 thres)
{
	int error;

	error = bma150_set_reg_bits(bma150->client, hyst,
				BMA150_HIGH_G_HYST_POS, BMA150_HIGH_G_HYST_MSK,
				BMA150_HIGH_G_HYST_REG);
	if (error)
		return error;

	error = bma150_write_byte(bma150->client,
				BMA150_HIGH_G_DUR_REG, dur);
	if (error)
		return error;

	error = bma150_write_byte(bma150->client,
				BMA150_HIGH_G_THRES_REG, thres);
	if (error)
		return error;

	return bma150_set_reg_bits(bma150->client, !!enable,
				BMA150_HIGH_G_EN_POS, BMA150_HIGH_G_EN_MSK,
				BMA150_HIGH_G_EN_REG);
}


static int bma150_set_any_motion_interrupt(struct bma150_data *bma150,
						u8 enable, u8 dur, u8 thres)
{
	int error;

	error = bma150_set_reg_bits(bma150->client, dur,
				BMA150_ANY_MOTION_DUR_POS,
				BMA150_ANY_MOTION_DUR_MSK,
				BMA150_ANY_MOTION_DUR_REG);
	if (error)
		return error;

	error = bma150_write_byte(bma150->client,
				BMA150_ANY_MOTION_THRES_REG, thres);
	if (error)
		return error;

	error = bma150_set_reg_bits(bma150->client, !!enable,
				BMA150_ADV_INT_EN_POS, BMA150_ADV_INT_EN_MSK,
				BMA150_ADV_INT_EN_REG);
	if (error)
		return error;

	return bma150_set_reg_bits(bma150->client, !!enable,
				BMA150_ANY_MOTION_EN_POS,
				BMA150_ANY_MOTION_EN_MSK,
				BMA150_ANY_MOTION_EN_REG);
}

static void bma150_report_xyz(struct bma150_data *bma150)
{
	u8 data[BMA150_XYZ_DATA_SIZE];
	s16 x, y, z;
	s32 ret;

	ret = i2c_smbus_read_i2c_block_data(bma150->client,
			BMA150_ACC_X_LSB_REG, BMA150_XYZ_DATA_SIZE, data);
	if (ret != BMA150_XYZ_DATA_SIZE)
		return;

	x = ((0xc0 & data[0]) >> 6) | (data[1] << 2);
	y = ((0xc0 & data[2]) >> 6) | (data[3] << 2);
	z = ((0xc0 & data[4]) >> 6) | (data[5] << 2);

	/* sign extension */
	x = (s16) (x << 6) >> 6;
	y = (s16) (y << 6) >> 6;
	z = (s16) (z << 6) >> 6;

	input_report_abs(bma150->input, ABS_X, x);
	input_report_abs(bma150->input, ABS_Y, y);
	input_report_abs(bma150->input, ABS_Z, z);
	input_sync(bma150->input);
}

static irqreturn_t bma150_irq_thread(int irq, void *dev)
{
	bma150_report_xyz(dev);

	return IRQ_HANDLED;
}

static void bma150_poll(struct input_polled_dev *dev)
{
	bma150_report_xyz(dev->private);
}

static int bma150_open(struct bma150_data *bma150)
{
	int error;

	error = pm_runtime_get_sync(&bma150->client->dev);
	if (error < 0 && error != -ENOSYS)
		return error;

	/*
	 * See if runtime PM woke up the device. If runtime PM
	 * is disabled we need to do it ourselves.
	 */
	if (bma150->mode != BMA150_MODE_NORMAL) {
		error = bma150_set_mode(bma150, BMA150_MODE_NORMAL);
		if (error)
			return error;
	}

	return 0;
}

static void bma150_close(struct bma150_data *bma150)
{
	pm_runtime_put_sync(&bma150->client->dev);

	if (bma150->mode != BMA150_MODE_SLEEP)
		bma150_set_mode(bma150, BMA150_MODE_SLEEP);
}

static int bma150_irq_open(struct input_dev *input)
{
	struct bma150_data *bma150 = input_get_drvdata(input);

	return bma150_open(bma150);
}

static void bma150_irq_close(struct input_dev *input)
{
	struct bma150_data *bma150 = input_get_drvdata(input);

	bma150_close(bma150);
}

static void bma150_poll_open(struct input_polled_dev *ipoll_dev)
{
	struct bma150_data *bma150 = ipoll_dev->private;

	bma150_open(bma150);
}

static void bma150_poll_close(struct input_polled_dev *ipoll_dev)
{
	struct bma150_data *bma150 = ipoll_dev->private;

	bma150_close(bma150);
}

static int bma150_initialize(struct bma150_data *bma150,
				       const struct bma150_cfg *cfg)
{
	int error;

	error = bma150_soft_reset(bma150);
	if (error)
		return error;

	error = bma150_set_bandwidth(bma150, cfg->bandwidth);
	if (error)
		return error;

	error = bma150_set_range(bma150, cfg->range);
	if (error)
		return error;

	if (bma150->client->irq) {
		error = bma150_set_any_motion_interrupt(bma150,
					cfg->any_motion_int,
					cfg->any_motion_dur,
					cfg->any_motion_thres);
		if (error)
			return error;

		error = bma150_set_high_g_interrupt(bma150,
					cfg->hg_int, cfg->hg_hyst,
					cfg->hg_dur, cfg->hg_thres);
		if (error)
			return error;

		error = bma150_set_low_g_interrupt(bma150,
					cfg->lg_int, cfg->lg_hyst,
					cfg->lg_dur, cfg->lg_thres);
		if (error)
			return error;
	}

	return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
}

static void bma150_init_input_device(struct bma150_data *bma150,
						struct input_dev *idev)
{
	idev->name = BMA150_DRIVER;
	idev->phys = BMA150_DRIVER "/input0";
	idev->id.bustype = BUS_I2C;
	idev->dev.parent = &bma150->client->dev;

	idev->evbit[0] = BIT_MASK(EV_ABS);
	input_set_abs_params(idev, ABS_X, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
	input_set_abs_params(idev, ABS_Y, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
	input_set_abs_params(idev, ABS_Z, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
}

static int bma150_register_input_device(struct bma150_data *bma150)
{
	struct input_dev *idev;
	int error;

	idev = input_allocate_device();
	if (!idev)
		return -ENOMEM;

	bma150_init_input_device(bma150, idev);

	idev->open = bma150_irq_open;
	idev->close = bma150_irq_close;
	input_set_drvdata(idev, bma150);

	error = input_register_device(idev);
	if (error) {
		input_free_device(idev);
		return error;
	}

	bma150->input = idev;
	return 0;
}

static int bma150_register_polled_device(struct bma150_data *bma150)
{
	struct input_polled_dev *ipoll_dev;
	int error;

	ipoll_dev = input_allocate_polled_device();
	if (!ipoll_dev)
		return -ENOMEM;

	ipoll_dev->private = bma150;
	ipoll_dev->open = bma150_poll_open;
	ipoll_dev->close = bma150_poll_close;
	ipoll_dev->poll = bma150_poll;
	ipoll_dev->poll_interval = BMA150_POLL_INTERVAL;
	ipoll_dev->poll_interval_min = BMA150_POLL_MIN;
	ipoll_dev->poll_interval_max = BMA150_POLL_MAX;

	bma150_init_input_device(bma150, ipoll_dev->input);

	error = input_register_polled_device(ipoll_dev);
	if (error) {
		input_free_polled_device(ipoll_dev);
		return error;
	}

	bma150->input_polled = ipoll_dev;
	bma150->input = ipoll_dev->input;

	return 0;
}

static int bma150_probe(struct i2c_client *client,
				  const struct i2c_device_id *id)
{
	const struct bma150_platform_data *pdata =
			dev_get_platdata(&client->dev);
	const struct bma150_cfg *cfg;
	struct bma150_data *bma150;
	int chip_id;
	int error;

	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
		dev_err(&client->dev, "i2c_check_functionality error\n");
		return -EIO;
	}

	chip_id = i2c_smbus_read_byte_data(client, BMA150_CHIP_ID_REG);
	if (chip_id != BMA150_CHIP_ID && chip_id != BMA180_CHIP_ID) {
		dev_err(&client->dev, "BMA150 chip id error: %d\n", chip_id);
		return -EINVAL;
	}

	bma150 = kzalloc(sizeof(struct bma150_data), GFP_KERNEL);
	if (!bma150)
		return -ENOMEM;

	bma150->client = client;

	if (pdata) {
		if (pdata->irq_gpio_cfg) {
			error = pdata->irq_gpio_cfg();
			if (error) {
				dev_err(&client->dev,
					"IRQ GPIO conf. error %d, error %d\n",
					client->irq, error);
				goto err_free_mem;
			}
		}
		cfg = &pdata->cfg;
	} else {
		cfg = &default_cfg;
	}

	error = bma150_initialize(bma150, cfg);
	if (error)
		goto err_free_mem;

	if (client->irq > 0) {
		error = bma150_register_input_device(bma150);
		if (error)
			goto err_free_mem;

		error = request_threaded_irq(client->irq,
					NULL, bma150_irq_thread,
					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
					BMA150_DRIVER, bma150);
		if (error) {
			dev_err(&client->dev,
				"irq request failed %d, error %d\n",
				client->irq, error);
			input_unregister_device(bma150->input);
			goto err_free_mem;
		}
	} else {
		error = bma150_register_polled_device(bma150);
		if (error)
			goto err_free_mem;
	}

	i2c_set_clientdata(client, bma150);

	pm_runtime_enable(&client->dev);

	return 0;

err_free_mem:
	kfree(bma150);
	return error;
}

static int bma150_remove(struct i2c_client *client)
{
	struct bma150_data *bma150 = i2c_get_clientdata(client);

	pm_runtime_disable(&client->dev);

	if (client->irq > 0) {
		free_irq(client->irq, bma150);
		input_unregister_device(bma150->input);
	} else {
		input_unregister_polled_device(bma150->input_polled);
		input_free_polled_device(bma150->input_polled);
	}

	kfree(bma150);

	return 0;
}

#ifdef CONFIG_PM
static int bma150_suspend(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct bma150_data *bma150 = i2c_get_clientdata(client);

	return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
}

static int bma150_resume(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct bma150_data *bma150 = i2c_get_clientdata(client);

	return bma150_set_mode(bma150, BMA150_MODE_NORMAL);
}
#endif

static UNIVERSAL_DEV_PM_OPS(bma150_pm, bma150_suspend, bma150_resume, NULL);

static const struct i2c_device_id bma150_id[] = {
	{ "bma150", 0 },
	{ "bma180", 0 },
	{ "smb380", 0 },
	{ "bma023", 0 },
	{ }
};

MODULE_DEVICE_TABLE(i2c, bma150_id);

static struct i2c_driver bma150_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= BMA150_DRIVER,
		.pm	= &bma150_pm,
	},
	.class		= I2C_CLASS_HWMON,
	.id_table	= bma150_id,
	.probe		= bma150_probe,
	.remove		= bma150_remove,
};

module_i2c_driver(bma150_driver);

MODULE_AUTHOR("Albert Zhang <xu.zhang@bosch-sensortec.com>");
MODULE_DESCRIPTION("BMA150 driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
c17ca3f5 EA	1	/*
	2	* Copyright (c) 2011 Bosch Sensortec GmbH
	3	* Copyright (c) 2011 Unixphere
	4	*
	5	* This driver adds support for Bosch Sensortec's digital acceleration
	6	* sensors BMA150 and SMB380.
	7	* The SMB380 is fully compatible with BMA150 and only differs in packaging.
	8	*
	9	* The datasheet for the BMA150 chip can be found here:
	10	* http://www.bosch-sensortec.com/content/language1/downloads/BST-BMA150-DS000-07.pdf
	11	*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License as published by
	14	* the Free Software Foundation; either version 2 of the License, or
	15	* (at your option) any later version.
	16	*
	17	* This program is distributed in the hope that it will be useful,
	18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	* GNU General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	25	*/
	26	#include <linux/kernel.h>
	27	#include <linux/module.h>
	28	#include <linux/i2c.h>
	29	#include <linux/input.h>
	30	#include <linux/input-polldev.h>
	31	#include <linux/interrupt.h>
	32	#include <linux/delay.h>
	33	#include <linux/slab.h>
	34	#include <linux/pm.h>
	35	#include <linux/pm_runtime.h>
	36	#include <linux/bma150.h>
	37
	38	#define ABSMAX_ACC_VAL 0x01FF
	39	#define ABSMIN_ACC_VAL -(ABSMAX_ACC_VAL)
	40
	41	/* Each axis is represented by a 2-byte data word */
	42	#define BMA150_XYZ_DATA_SIZE 6
	43
	44	/* Input poll interval in milliseconds */
	45	#define BMA150_POLL_INTERVAL 10
	46	#define BMA150_POLL_MAX 200
	47	#define BMA150_POLL_MIN 0
	48
c17ca3f5 EA	49	#define BMA150_MODE_NORMAL 0
	50	#define BMA150_MODE_SLEEP 2
	51	#define BMA150_MODE_WAKE_UP 3
	52
	53	/* Data register addresses */
	54	#define BMA150_DATA_0_REG 0x00
	55	#define BMA150_DATA_1_REG 0x01
	56	#define BMA150_DATA_2_REG 0x02
	57
	58	/* Control register addresses */
	59	#define BMA150_CTRL_0_REG 0x0A
	60	#define BMA150_CTRL_1_REG 0x0B
	61	#define BMA150_CTRL_2_REG 0x14
	62	#define BMA150_CTRL_3_REG 0x15
	63
	64	/* Configuration/Setting register addresses */
	65	#define BMA150_CFG_0_REG 0x0C
	66	#define BMA150_CFG_1_REG 0x0D
	67	#define BMA150_CFG_2_REG 0x0E
	68	#define BMA150_CFG_3_REG 0x0F
	69	#define BMA150_CFG_4_REG 0x10
	70	#define BMA150_CFG_5_REG 0x11
	71
	72	#define BMA150_CHIP_ID 2
ef3714fd	73	#define BMA180_CHIP_ID 3
c17ca3f5 EA	74	#define BMA150_CHIP_ID_REG BMA150_DATA_0_REG
	75
	76	#define BMA150_ACC_X_LSB_REG BMA150_DATA_2_REG
	77
	78	#define BMA150_SLEEP_POS 0
	79	#define BMA150_SLEEP_MSK 0x01
	80	#define BMA150_SLEEP_REG BMA150_CTRL_0_REG
	81
	82	#define BMA150_BANDWIDTH_POS 0
	83	#define BMA150_BANDWIDTH_MSK 0x07
	84	#define BMA150_BANDWIDTH_REG BMA150_CTRL_2_REG
	85
	86	#define BMA150_RANGE_POS 3
	87	#define BMA150_RANGE_MSK 0x18
	88	#define BMA150_RANGE_REG BMA150_CTRL_2_REG
	89
	90	#define BMA150_WAKE_UP_POS 0
	91	#define BMA150_WAKE_UP_MSK 0x01
	92	#define BMA150_WAKE_UP_REG BMA150_CTRL_3_REG
	93
	94	#define BMA150_SW_RES_POS 1
	95	#define BMA150_SW_RES_MSK 0x02
	96	#define BMA150_SW_RES_REG BMA150_CTRL_0_REG
	97
	98	/* Any-motion interrupt register fields */
	99	#define BMA150_ANY_MOTION_EN_POS 6
	100	#define BMA150_ANY_MOTION_EN_MSK 0x40
	101	#define BMA150_ANY_MOTION_EN_REG BMA150_CTRL_1_REG
	102
	103	#define BMA150_ANY_MOTION_DUR_POS 6
	104	#define BMA150_ANY_MOTION_DUR_MSK 0xC0
	105	#define BMA150_ANY_MOTION_DUR_REG BMA150_CFG_5_REG
	106
	107	#define BMA150_ANY_MOTION_THRES_REG BMA150_CFG_4_REG
	108
	109	/* Advanced interrupt register fields */
	110	#define BMA150_ADV_INT_EN_POS 6
	111	#define BMA150_ADV_INT_EN_MSK 0x40
	112	#define BMA150_ADV_INT_EN_REG BMA150_CTRL_3_REG
	113
	114	/* High-G interrupt register fields */
	115	#define BMA150_HIGH_G_EN_POS 1
	116	#define BMA150_HIGH_G_EN_MSK 0x02
	117	#define BMA150_HIGH_G_EN_REG BMA150_CTRL_1_REG
	118
	119	#define BMA150_HIGH_G_HYST_POS 3
	120	#define BMA150_HIGH_G_HYST_MSK 0x38
	121	#define BMA150_HIGH_G_HYST_REG BMA150_CFG_5_REG
	122
	123	#define BMA150_HIGH_G_DUR_REG BMA150_CFG_3_REG
	124	#define BMA150_HIGH_G_THRES_REG BMA150_CFG_2_REG
	125
	126	/* Low-G interrupt register fields */
	127	#define BMA150_LOW_G_EN_POS 0
	128	#define BMA150_LOW_G_EN_MSK 0x01
	129	#define BMA150_LOW_G_EN_REG BMA150_CTRL_1_REG
	130
	131	#define BMA150_LOW_G_HYST_POS 0
	132	#define BMA150_LOW_G_HYST_MSK 0x07
	133	#define BMA150_LOW_G_HYST_REG BMA150_CFG_5_REG
	134
	135	#define BMA150_LOW_G_DUR_REG BMA150_CFG_1_REG
	136	#define BMA150_LOW_G_THRES_REG BMA150_CFG_0_REG
	137
138	struct bma150_data {
139	struct i2c_client *client;
140	struct input_polled_dev *input_polled;
141	struct input_dev *input;
142	u8 mode;
143	};
144
145	/*
146	* The settings for the given range, bandwidth and interrupt features
147	* are stated and verified by Bosch Sensortec where they are configured
148	* to provide a generic sensitivity performance.
149	*/
d6f6dfd9	150	static struct bma150_cfg default_cfg = {
c17ca3f5 EA	151	.any_motion_int = 1,
	152	.hg_int = 1,
	153	.lg_int = 1,
	154	.any_motion_dur = 0,
	155	.any_motion_thres = 0,
	156	.hg_hyst = 0,
	157	.hg_dur = 150,
	158	.hg_thres = 160,
	159	.lg_hyst = 0,
	160	.lg_dur = 150,
	161	.lg_thres = 20,
	162	.range = BMA150_RANGE_2G,
	163	.bandwidth = BMA150_BW_50HZ
	164	};
	165
	166	static int bma150_write_byte(struct i2c_client *client, u8 reg, u8 val)
	167	{
	168	s32 ret;
	169
	170	/* As per specification, disable irq in between register writes */
	171	if (client->irq)
	172	disable_irq_nosync(client->irq);
	173
	174	ret = i2c_smbus_write_byte_data(client, reg, val);
	175
	176	if (client->irq)
	177	enable_irq(client->irq);
	178
	179	return ret;
	180	}
	181
	182	static int bma150_set_reg_bits(struct i2c_client *client,
	183	int val, int shift, u8 mask, u8 reg)
	184	{
	185	int data;
	186
	187	data = i2c_smbus_read_byte_data(client, reg);
	188	if (data < 0)
	189	return data;
	190
	191	data = (data & ~mask) \| ((val << shift) & mask);
	192	return bma150_write_byte(client, reg, data);
	193	}
	194
	195	static int bma150_set_mode(struct bma150_data *bma150, u8 mode)
	196	{
	197	int error;
	198
	199	error = bma150_set_reg_bits(bma150->client, mode, BMA150_WAKE_UP_POS,
	200	BMA150_WAKE_UP_MSK, BMA150_WAKE_UP_REG);
	201	if (error)
	202	return error;
	203
	204	error = bma150_set_reg_bits(bma150->client, mode, BMA150_SLEEP_POS,
	205	BMA150_SLEEP_MSK, BMA150_SLEEP_REG);
	206	if (error)
	207	return error;
	208
	209	if (mode == BMA150_MODE_NORMAL)
	210	msleep(2);
	211
	212	bma150->mode = mode;
	213	return 0;
	214	}
215
5298cc4c	216	static int bma150_soft_reset(struct bma150_data *bma150)
c17ca3f5 EA	217	{
	218	int error;
	219
	220	error = bma150_set_reg_bits(bma150->client, 1, BMA150_SW_RES_POS,
	221	BMA150_SW_RES_MSK, BMA150_SW_RES_REG);
	222	if (error)
	223	return error;
	224
	225	msleep(2);
	226	return 0;
	227	}
	228
5298cc4c	229	static int bma150_set_range(struct bma150_data *bma150, u8 range)
c17ca3f5 EA	230	{
	231	return bma150_set_reg_bits(bma150->client, range, BMA150_RANGE_POS,
	232	BMA150_RANGE_MSK, BMA150_RANGE_REG);
	233	}
	234
5298cc4c	235	static int bma150_set_bandwidth(struct bma150_data *bma150, u8 bw)
c17ca3f5 EA	236	{
	237	return bma150_set_reg_bits(bma150->client, bw, BMA150_BANDWIDTH_POS,
	238	BMA150_BANDWIDTH_MSK, BMA150_BANDWIDTH_REG);
	239	}
	240
5298cc4c	241	static int bma150_set_low_g_interrupt(struct bma150_data *bma150,
c17ca3f5 EA	242	u8 enable, u8 hyst, u8 dur, u8 thres)
	243	{
	244	int error;
	245
	246	error = bma150_set_reg_bits(bma150->client, hyst,
	247	BMA150_LOW_G_HYST_POS, BMA150_LOW_G_HYST_MSK,
	248	BMA150_LOW_G_HYST_REG);
	249	if (error)
	250	return error;
	251
	252	error = bma150_write_byte(bma150->client, BMA150_LOW_G_DUR_REG, dur);
	253	if (error)
	254	return error;
	255
	256	error = bma150_write_byte(bma150->client, BMA150_LOW_G_THRES_REG, thres);
	257	if (error)
	258	return error;
	259
	260	return bma150_set_reg_bits(bma150->client, !!enable,
	261	BMA150_LOW_G_EN_POS, BMA150_LOW_G_EN_MSK,
	262	BMA150_LOW_G_EN_REG);
	263	}
	264
5298cc4c	265	static int bma150_set_high_g_interrupt(struct bma150_data *bma150,
c17ca3f5 EA	266	u8 enable, u8 hyst, u8 dur, u8 thres)
	267	{
	268	int error;
	269
	270	error = bma150_set_reg_bits(bma150->client, hyst,
	271	BMA150_HIGH_G_HYST_POS, BMA150_HIGH_G_HYST_MSK,
	272	BMA150_HIGH_G_HYST_REG);
	273	if (error)
	274	return error;
	275
	276	error = bma150_write_byte(bma150->client,
	277	BMA150_HIGH_G_DUR_REG, dur);
	278	if (error)
	279	return error;
	280
	281	error = bma150_write_byte(bma150->client,
	282	BMA150_HIGH_G_THRES_REG, thres);
	283	if (error)
	284	return error;
	285
	286	return bma150_set_reg_bits(bma150->client, !!enable,
	287	BMA150_HIGH_G_EN_POS, BMA150_HIGH_G_EN_MSK,
	288	BMA150_HIGH_G_EN_REG);
	289	}
	290
	291
5298cc4c	292	static int bma150_set_any_motion_interrupt(struct bma150_data *bma150,
c17ca3f5 EA	293	u8 enable, u8 dur, u8 thres)
	294	{
	295	int error;
	296
	297	error = bma150_set_reg_bits(bma150->client, dur,
	298	BMA150_ANY_MOTION_DUR_POS,
	299	BMA150_ANY_MOTION_DUR_MSK,
	300	BMA150_ANY_MOTION_DUR_REG);
	301	if (error)
	302	return error;
	303
	304	error = bma150_write_byte(bma150->client,
	305	BMA150_ANY_MOTION_THRES_REG, thres);
	306	if (error)
	307	return error;
	308
	309	error = bma150_set_reg_bits(bma150->client, !!enable,
	310	BMA150_ADV_INT_EN_POS, BMA150_ADV_INT_EN_MSK,
	311	BMA150_ADV_INT_EN_REG);
	312	if (error)
	313	return error;
	314
	315	return bma150_set_reg_bits(bma150->client, !!enable,
	316	BMA150_ANY_MOTION_EN_POS,
	317	BMA150_ANY_MOTION_EN_MSK,
	318	BMA150_ANY_MOTION_EN_REG);
	319	}
	320
	321	static void bma150_report_xyz(struct bma150_data *bma150)
	322	{
	323	u8 data[BMA150_XYZ_DATA_SIZE];
	324	s16 x, y, z;
	325	s32 ret;
	326
	327	ret = i2c_smbus_read_i2c_block_data(bma150->client,
	328	BMA150_ACC_X_LSB_REG, BMA150_XYZ_DATA_SIZE, data);
	329	if (ret != BMA150_XYZ_DATA_SIZE)
	330	return;
	331
	332	x = ((0xc0 & data[0]) >> 6) \| (data[1] << 2);
	333	y = ((0xc0 & data[2]) >> 6) \| (data[3] << 2);
	334	z = ((0xc0 & data[4]) >> 6) \| (data[5] << 2);
	335
	336	/* sign extension */
	337	x = (s16) (x << 6) >> 6;
	338	y = (s16) (y << 6) >> 6;
	339	z = (s16) (z << 6) >> 6;
	340
	341	input_report_abs(bma150->input, ABS_X, x);
	342	input_report_abs(bma150->input, ABS_Y, y);
	343	input_report_abs(bma150->input, ABS_Z, z);
	344	input_sync(bma150->input);
	345	}
	346
	347	static irqreturn_t bma150_irq_thread(int irq, void *dev)
	348	{
	349	bma150_report_xyz(dev);
	350
	351	return IRQ_HANDLED;
	352	}
	353
	354	static void bma150_poll(struct input_polled_dev *dev)
	355	{
	356	bma150_report_xyz(dev->private);
357	}
358
359	static int bma150_open(struct bma150_data *bma150)
360	{
361	int error;
362
363	error = pm_runtime_get_sync(&bma150->client->dev);
79f34d19	364	if (error < 0 && error != -ENOSYS)
c17ca3f5 EA	365	return error;
	366
	367	/*
	368	* See if runtime PM woke up the device. If runtime PM
	369	* is disabled we need to do it ourselves.
	370	*/
	371	if (bma150->mode != BMA150_MODE_NORMAL) {
	372	error = bma150_set_mode(bma150, BMA150_MODE_NORMAL);
	373	if (error)
	374	return error;
	375	}
	376
	377	return 0;
	378	}
	379
	380	static void bma150_close(struct bma150_data *bma150)
	381	{
	382	pm_runtime_put_sync(&bma150->client->dev);
	383
	384	if (bma150->mode != BMA150_MODE_SLEEP)
	385	bma150_set_mode(bma150, BMA150_MODE_SLEEP);
	386	}
	387
	388	static int bma150_irq_open(struct input_dev *input)
	389	{
	390	struct bma150_data *bma150 = input_get_drvdata(input);
	391
	392	return bma150_open(bma150);
	393	}
	394
	395	static void bma150_irq_close(struct input_dev *input)
	396	{
	397	struct bma150_data *bma150 = input_get_drvdata(input);
	398
	399	bma150_close(bma150);
	400	}
	401
	402	static void bma150_poll_open(struct input_polled_dev *ipoll_dev)
	403	{
	404	struct bma150_data *bma150 = ipoll_dev->private;
	405
	406	bma150_open(bma150);
	407	}
	408
	409	static void bma150_poll_close(struct input_polled_dev *ipoll_dev)
	410	{
	411	struct bma150_data *bma150 = ipoll_dev->private;
	412
	413	bma150_close(bma150);
	414	}
	415
5298cc4c	416	static int bma150_initialize(struct bma150_data *bma150,
c17ca3f5 EA	417	const struct bma150_cfg *cfg)
	418	{
	419	int error;
	420
	421	error = bma150_soft_reset(bma150);
	422	if (error)
	423	return error;
	424
	425	error = bma150_set_bandwidth(bma150, cfg->bandwidth);
	426	if (error)
	427	return error;
	428
	429	error = bma150_set_range(bma150, cfg->range);
	430	if (error)
	431	return error;
	432
	433	if (bma150->client->irq) {
	434	error = bma150_set_any_motion_interrupt(bma150,
	435	cfg->any_motion_int,
	436	cfg->any_motion_dur,
	437	cfg->any_motion_thres);
	438	if (error)
	439	return error;
	440
	441	error = bma150_set_high_g_interrupt(bma150,
	442	cfg->hg_int, cfg->hg_hyst,
	443	cfg->hg_dur, cfg->hg_thres);
	444	if (error)
	445	return error;
	446
	447	error = bma150_set_low_g_interrupt(bma150,
	448	cfg->lg_int, cfg->lg_hyst,
	449	cfg->lg_dur, cfg->lg_thres);
	450	if (error)
	451	return error;
	452	}
	453
	454	return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
	455	}
	456
5298cc4c	457	static void bma150_init_input_device(struct bma150_data *bma150,
c17ca3f5 EA	458	struct input_dev *idev)
	459	{
	460	idev->name = BMA150_DRIVER;
	461	idev->phys = BMA150_DRIVER "/input0";
	462	idev->id.bustype = BUS_I2C;
	463	idev->dev.parent = &bma150->client->dev;
	464
	465	idev->evbit[0] = BIT_MASK(EV_ABS);
	466	input_set_abs_params(idev, ABS_X, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
	467	input_set_abs_params(idev, ABS_Y, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
	468	input_set_abs_params(idev, ABS_Z, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
	469	}
	470
5298cc4c	471	static int bma150_register_input_device(struct bma150_data *bma150)
c17ca3f5 EA	472	{
	473	struct input_dev *idev;
	474	int error;
	475
	476	idev = input_allocate_device();
	477	if (!idev)
	478	return -ENOMEM;
	479
	480	bma150_init_input_device(bma150, idev);
	481
	482	idev->open = bma150_irq_open;
	483	idev->close = bma150_irq_close;
	484	input_set_drvdata(idev, bma150);
	485
	486	error = input_register_device(idev);
	487	if (error) {
	488	input_free_device(idev);
	489	return error;
	490	}
	491
	492	bma150->input = idev;
	493	return 0;
	494	}
	495
5298cc4c	496	static int bma150_register_polled_device(struct bma150_data *bma150)
c17ca3f5 EA	497	{
	498	struct input_polled_dev *ipoll_dev;
	499	int error;
	500
	501	ipoll_dev = input_allocate_polled_device();
	502	if (!ipoll_dev)
	503	return -ENOMEM;
	504
	505	ipoll_dev->private = bma150;
	506	ipoll_dev->open = bma150_poll_open;
	507	ipoll_dev->close = bma150_poll_close;
	508	ipoll_dev->poll = bma150_poll;
	509	ipoll_dev->poll_interval = BMA150_POLL_INTERVAL;
	510	ipoll_dev->poll_interval_min = BMA150_POLL_MIN;
	511	ipoll_dev->poll_interval_max = BMA150_POLL_MAX;
	512
	513	bma150_init_input_device(bma150, ipoll_dev->input);
	514
	515	error = input_register_polled_device(ipoll_dev);
	516	if (error) {
	517	input_free_polled_device(ipoll_dev);
	518	return error;
	519	}
	520
	521	bma150->input_polled = ipoll_dev;
	522	bma150->input = ipoll_dev->input;
	523
	524	return 0;
	525	}
	526
5298cc4c	527	static int bma150_probe(struct i2c_client *client,
c17ca3f5 EA	528	const struct i2c_device_id *id)
c17ca3f5 EA	529	{
c838cb3d JH	530	const struct bma150_platform_data *pdata =
c838cb3d JH	531	dev_get_platdata(&client->dev);
c17ca3f5 EA	532	const struct bma150_cfg *cfg;
	533	struct bma150_data *bma150;
	534	int chip_id;
	535	int error;
	536
	537	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
	538	dev_err(&client->dev, "i2c_check_functionality error\n");
	539	return -EIO;
	540	}
	541
	542	chip_id = i2c_smbus_read_byte_data(client, BMA150_CHIP_ID_REG);
ef3714fd	543	if (chip_id != BMA150_CHIP_ID && chip_id != BMA180_CHIP_ID) {
c17ca3f5 EA	544	dev_err(&client->dev, "BMA150 chip id error: %d\n", chip_id);
	545	return -EINVAL;
	546	}
	547
	548	bma150 = kzalloc(sizeof(struct bma150_data), GFP_KERNEL);
	549	if (!bma150)
	550	return -ENOMEM;
	551
	552	bma150->client = client;
	553
	554	if (pdata) {
	555	if (pdata->irq_gpio_cfg) {
	556	error = pdata->irq_gpio_cfg();
	557	if (error) {
	558	dev_err(&client->dev,
	559	"IRQ GPIO conf. error %d, error %d\n",
	560	client->irq, error);
	561	goto err_free_mem;
	562	}
	563	}
	564	cfg = &pdata->cfg;
	565	} else {
	566	cfg = &default_cfg;
	567	}
	568
	569	error = bma150_initialize(bma150, cfg);
	570	if (error)
	571	goto err_free_mem;
	572
	573	if (client->irq > 0) {
	574	error = bma150_register_input_device(bma150);
	575	if (error)
	576	goto err_free_mem;
	577
	578	error = request_threaded_irq(client->irq,
	579	NULL, bma150_irq_thread,
	580	IRQF_TRIGGER_RISING \| IRQF_ONESHOT,
	581	BMA150_DRIVER, bma150);
	582	if (error) {
	583	dev_err(&client->dev,
	584	"irq request failed %d, error %d\n",
	585	client->irq, error);
	586	input_unregister_device(bma150->input);
	587	goto err_free_mem;
	588	}
	589	} else {
	590	error = bma150_register_polled_device(bma150);
	591	if (error)
	592	goto err_free_mem;
	593	}
	594
	595	i2c_set_clientdata(client, bma150);
	596
	597	pm_runtime_enable(&client->dev);
	598
	599	return 0;
	600
	601	err_free_mem:
	602	kfree(bma150);
	603	return error;
	604	}
	605
e2619cf7	606	static int bma150_remove(struct i2c_client *client)
c17ca3f5 EA	607	{
	608	struct bma150_data *bma150 = i2c_get_clientdata(client);
	609
	610	pm_runtime_disable(&client->dev);
	611
	612	if (client->irq > 0) {
	613	free_irq(client->irq, bma150);
	614	input_unregister_device(bma150->input);
	615	} else {
	616	input_unregister_polled_device(bma150->input_polled);
	617	input_free_polled_device(bma150->input_polled);
	618	}
	619
	620	kfree(bma150);
	621
	622	return 0;
	623	}
	624
	625	#ifdef CONFIG_PM
	626	static int bma150_suspend(struct device *dev)
	627	{
	628	struct i2c_client *client = to_i2c_client(dev);
	629	struct bma150_data *bma150 = i2c_get_clientdata(client);
	630
	631	return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
	632	}
	633
	634	static int bma150_resume(struct device *dev)
	635	{
	636	struct i2c_client *client = to_i2c_client(dev);
	637	struct bma150_data *bma150 = i2c_get_clientdata(client);
	638
	639	return bma150_set_mode(bma150, BMA150_MODE_NORMAL);
	640	}
	641	#endif
	642
	643	static UNIVERSAL_DEV_PM_OPS(bma150_pm, bma150_suspend, bma150_resume, NULL);
	644
	645	static const struct i2c_device_id bma150_id[] = {
	646	{ "bma150", 0 },
ef3714fd	647	{ "bma180", 0 },
c17ca3f5 EA	648	{ "smb380", 0 },
	649	{ "bma023", 0 },
	650	{ }
	651	};
	652
	653	MODULE_DEVICE_TABLE(i2c, bma150_id);
	654
	655	static struct i2c_driver bma150_driver = {
	656	.driver = {
	657	.owner = THIS_MODULE,
	658	.name = BMA150_DRIVER,
	659	.pm = &bma150_pm,
	660	},
	661	.class = I2C_CLASS_HWMON,
	662	.id_table = bma150_id,
	663	.probe = bma150_probe,
1cb0aa88	664	.remove = bma150_remove,
c17ca3f5 EA	665	};
c17ca3f5 EA	666
1b92c1cf	667	module_i2c_driver(bma150_driver);
c17ca3f5 EA	668
	669	MODULE_AUTHOR("Albert Zhang <xu.zhang@bosch-sensortec.com>");
	670	MODULE_DESCRIPTION("BMA150 driver");
	671	MODULE_LICENSE("GPL");