// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/input.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 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_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 const 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)
usleep_range(2000, 2100);
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;
usleep_range(2000, 2100);
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);
x = sign_extend32(x, 9);
y = sign_extend32(y, 9);
z = sign_extend32(z, 9);
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_dev *input)
{
struct bma150_data *bma150 = input_get_drvdata(input);
bma150_report_xyz(bma150);
}
static int bma150_open(
struct input_dev *input)
{
struct bma150_data *bma150 = input_get_drvdata(input);
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 input_dev *input)
{
struct bma150_data *bma150 = input_get_drvdata(input);
pm_runtime_put_sync(&bma150->client->dev);
if (bma150->mode != BMA150_MODE_SLEEP)
bma150_set_mode(bma150, BMA150_MODE_SLEEP);
}
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 int bma150_probe(
struct i2c_client *client)
{
const struct bma150_platform_data *pdata =
dev_get_platdata(&client->dev);
const struct bma150_cfg *cfg;
struct bma150_data *bma150;
struct input_dev *idev;
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) {
dev_err(&client->dev,
"BMA150 chip id error: %d\n", chip_id);
return -EINVAL;
}
bma150 = devm_kzalloc(&client->dev,
sizeof(*bma150), 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);
return error;
}
}
cfg = &pdata->cfg;
}
else {
cfg = &default_cfg;
}
error = bma150_initialize(bma150, cfg);
if (error)
return error;
idev = devm_input_allocate_device(&bma150->client->dev);
if (!idev)
return -ENOMEM;
input_set_drvdata(idev, bma150);
bma150->input = idev;
idev->name = BMA150_DRIVER;
idev->phys = BMA150_DRIVER
"/input0";
idev->id.bustype = BUS_I2C;
idev->open = bma150_open;
idev->close = bma150_close;
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);
if (client->irq <= 0) {
error = input_setup_polling(idev, bma150_poll);
if (error)
return error;
input_set_poll_interval(idev, BMA150_POLL_INTERVAL);
input_set_min_poll_interval(idev, BMA150_POLL_MIN);
input_set_max_poll_interval(idev, BMA150_POLL_MAX);
}
error = input_register_device(idev);
if (error)
return error;
if (client->irq > 0) {
error = devm_request_threaded_irq(&client->dev, 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);
return error;
}
}
i2c_set_clientdata(client, bma150);
pm_runtime_enable(&client->dev);
return 0;
}
static void bma150_remove(
struct i2c_client *client)
{
pm_runtime_disable(&client->dev);
}
static int __maybe_unused 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 __maybe_unused 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);
}
static UNIVERSAL_DEV_PM_OPS(bma150_pm, bma150_suspend, bma150_resume, NULL);
static const struct i2c_device_id bma150_id[] = {
{
"bma150" },
{
"smb380" },
{
"bma023" },
{ }
};
MODULE_DEVICE_TABLE(i2c, bma150_id);
static struct i2c_driver bma150_driver = {
.driver = {
.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 ");
MODULE_DESCRIPTION(
"BMA150 driver");
MODULE_LICENSE(
"GPL");
