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lis2dw12_core.c
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lis2dw12_core.c
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/******************** (C) COPYRIGHT 2016 STMicroelectronics ********************
*
* File Name : lis2dw12_core.c
* Authors : AMG - Application Team
* : Mario Tesi <mario.tesi@st.com>
* : Giuseppe Barba <giuseppe.barba@st.com>
* : Author is willing to be considered the contact and update
* : point for the driver.
* Version : V.1.0
* Date : 2016/Oct/18
* Description : LIS2DW12 driver
*
********************************************************************************
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* THE PRESENT SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES
* OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, FOR THE SOLE
* PURPOSE TO SUPPORT YOUR APPLICATION DEVELOPMENT.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*
*******************************************************************************/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/hrtimer.h>
#include <linux/input.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#ifdef CONFIG_OF
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#else
#include "linux/platform_data/st/lis2dw12.h"
#endif
#include "lis2dw12_core.h"
#define LIS2DW12_WHO_AM_I_ADDR 0x0f
#define LIS2DW12_WHO_AM_I_DEF 0x44
#define LIS2DW12_CTRL1_ADDR 0x20
#define LIS2DW12_CTRL2_ADDR 0x21
#define LIS2DW12_CTRL3_ADDR 0x22
#define LIS2DW12_CTRL4_INT1_PAD_ADDR 0x23
#define LIS2DW12_CTRL5_INT2_PAD_ADDR 0x24
#define LIS2DW12_CTRL6_ADDR 0x25
#define LIS2DW12_OUT_T_ADDR 0x26
#define LIS2DW12_STATUS_ADDR 0x27
#define LIS2DW12_OUTX_L_ADDR 0x28
#define LIS2DW12_TAP_THS_X_ADDR 0x30
#define LIS2DW12_TAP_THS_Y_ADDR 0x31
#define LIS2DW12_TAP_THS_Z_ADDR 0x32
#define LIS2DW12_INT_DUR_ADDR 0x33
#define LIS2DW12_WAKE_UP_THS_ADDR 0x34
#define LIS2DW12_WAKE_UP_DUR_ADDR 0x35
#define LIS2DW12_FREE_FALL_ADDR 0x36
#define LIS2DW12_STATUS_DUP_ADDR 0x37
#define LIS2DW12_WAKE_UP_SRC_ADDR 0x38
#define LIS2DW12_TAP_SRC_ADDR 0x39
#define LIS2DW12_6D_SRC_ADDR 0x3a
#define LIS2DW12_ALL_INT_ADDR 0x3b
#define LIS2DW12_WAKE_UP_IA_MASK 0x40
#define LIS2DW12_DOUBLE_TAP_MASK 0x10
#define LIS2DW12_SINGLE_TAP_MASK 0x08
#define LIS2DW12_6D_IA_MASK 0x04
#define LIS2DW12_FF_IA_MASK 0x02
#define LIS2DW12_DRDY_MASK 0x01
#define LIS2DW12_EVENT_MASK (LIS2DW12_WAKE_UP_IA_MASK | \
LIS2DW12_DOUBLE_TAP_MASK | \
LIS2DW12_SINGLE_TAP_MASK | \
LIS2DW12_6D_IA_MASK | \
LIS2DW12_FF_IA_MASK)
#define LIS2DW12_ODR_MASK 0xf0
#define LIS2DW12_ODR_POWER_OFF_VAL 0x00
#define LIS2DW12_ODR_1HZ_LP_VAL 0x01
#define LIS2DW12_ODR_12HZ_LP_VAL 0x02
#define LIS2DW12_ODR_25HZ_LP_VAL 0x03
#define LIS2DW12_ODR_50HZ_LP_VAL 0x04
#define LIS2DW12_ODR_100HZ_LP_VAL 0x05
#define LIS2DW12_ODR_200HZ_LP_VAL 0x06
#define LIS2DW12_ODR_400HZ_LP_VAL 0x06
#define LIS2DW12_ODR_800HZ_LP_VAL 0x06
#define LIS2DW12_ODR_LP_LIST_NUM 9
#define LIS2DW12_ODR_12_5HZ_HR_VAL 0x02
#define LIS2DW12_ODR_25HZ_HR_VAL 0x03
#define LIS2DW12_ODR_50HZ_HR_VAL 0x04
#define LIS2DW12_ODR_100HZ_HR_VAL 0x05
#define LIS2DW12_ODR_200HZ_HR_VAL 0x06
#define LIS2DW12_ODR_400HZ_HR_VAL 0x07
#define LIS2DW12_ODR_800HZ_HR_VAL 0x08
#define LIS2DW12_ODR_HR_LIST_NUM 8
#define LIS2DW12_LP_MODE_MASK 0x03
#define LIS2DW12_POWER_MODE_MASK 0x0c
#define LIS2DW12_FS_MASK 0x30
#define LIS2DW12_FS_2G_VAL 0x00
#define LIS2DW12_FS_4G_VAL 0x01
#define LIS2DW12_FS_8G_VAL 0x02
#define LIS2DW12_FS_16G_VAL 0x03
/*
* Sensitivity sets in LP mode [ug]
*/
#define LIS2DW12_FS_2G_GAIN_LP 976
#define LIS2DW12_FS_4G_GAIN_LP 1952
#define LIS2DW12_FS_8G_GAIN_LP 3904
#define LIS2DW12_FS_16G_GAIN_LP 7808
/*
* Sensitivity sets in HR mode [ug]
*/
#define LIS2DW12_FS_2G_GAIN_HR 244
#define LIS2DW12_FS_4G_GAIN_HR 488
#define LIS2DW12_FS_8G_GAIN_HR 976
#define LIS2DW12_FS_16G_GAIN_HR 1952
#define LIS2DW12_FS_LIST_NUM 4
#define LIS2DW12_INT1_6D_MASK 0x80
#define LIS2DW12_INT1_S_TAP_MASK 0x40
#define LIS2DW12_INT1_WAKEUP_MASK 0x20
#define LIS2DW12_INT1_FREE_FALL_MASK 0x10
#define LIS2DW12_INT1_TAP_MASK 0x08
#define LIS2DW12_INT1_DRDY_MASK 0x01
#define LIS2DW12_INT2_SLEEP_MASK 0x40
#define LIS2DW12_INT1_EVENTS_MASK (LIS2DW12_INT1_S_TAP_MASK | \
LIS2DW12_INT1_WAKEUP_MASK | \
LIS2DW12_INT1_FREE_FALL_MASK | \
LIS2DW12_INT1_TAP_MASK | \
LIS2DW12_INT1_6D_MASK)
#define LIS2DW12_INT_DUR_SHOCK_MASK 0x03
#define LIS2DW12_INT_DUR_QUIET_MASK 0x0c
#define LIS2DW12_INT_DUR_LAT_MASK 0xf0
#define LIS2DW12_INT_DUR_MASK (LIS2DW12_INT_DUR_SHOCK_MASK | \
LIS2DW12_INT_DUR_QUIET_MASK | \
LIS2DW12_INT_DUR_LAT_MASK)
#define LIS2DW12_INT_DUR_STAP_DEFAULT 0x06
#define LIS2DW12_INT_DUR_DTAP_DEFAULT 0x7f
#define LIS2DW12_WAKE_UP_THS_S_D_TAP_MASK 0x80
#define LIS2DW12_WAKE_UP_THS_SLEEP_MASK 0x40
#define LIS2DW12_WAKE_UP_THS_WU_MASK 0x3f
#define LIS2DW12_WAKE_UP_THS_WU_DEFAULT 0x02
#define LIS2DW12_FREE_FALL_THS_MASK 0x07
#define LIS2DW12_FREE_FALL_DUR_MASK 0xf8
#define LIS2DW12_FREE_FALL_THS_DEFAULT 0x01
#define LIS2DW12_FREE_FALL_DUR_DEFAULT 0x01
#define LIS2DW12_BDU_MASK 0x08
#define LIS2DW12_SOFT_RESET_MASK 0x40
#define LIS2DW12_LIR_MASK 0x10
#define LIS2DW12_TAP_AXIS_MASK 0xe0
#define LIS2DW12_TAP_AXIS_ANABLE_ALL 0xe0
#define LIS2DW12_TAP_THS_MASK 0x1f
#define LIS2DW12_TAP_THS_DEFAULT 0x09
#define LIS2DW12_INT2_ON_INT1_MASK 0x20
#define LIS2DW12_OUT_XYZ_SIZE 6
#define LIS2DW12_EN_BIT 0x01
#define LIS2DW12_DIS_BIT 0x00
#define LIS2DW12_EN_LP_MODE_02 0x01
#define LIS2DW12_ACCEL_FS 2
#define LIS2DW12_FF_ODR 25
#define LIS2DW12_TAP_ODR 400
#define LIS2DW12_WAKEUP_ODR 25
#define LIS2DW12_MIN_EVENT_ODR 25
enum {
LIS2DW12_LP_MODE = 0,
LIS2DW12_HR_MODE,
LIS2DW12_MODE_COUNT,
};
static struct workqueue_struct *lis2dw12_workqueue;
static const struct lis2dw12_sensor_name {
const char *name;
const char *description;
} lis2dw12_sensor_name[LIS2DW12_SENSORS_NUMB] = {
[LIS2DW12_ACCEL] = {
.name = "accel",
.description = "ST LIS2DW12 Accelerometer Sensor",
},
[LIS2DW12_FF] = {
.name = "free_fall",
.description = "ST LIS2DW12 Free Fall Sensor",
},
[LIS2DW12_TAP] = {
.name = "tap",
.description = "ST LIS2DW12 Tap Sensor",
},
[LIS2DW12_DOUBLE_TAP] = {
.name = "double_tap",
.description = "ST LIS2DW12 Double Tap Sensor",
},
[LIS2DW12_WAKEUP] = {
.name = "wake_up",
.description = "ST LIS2DW12 Wake Up Sensor",
},
};
struct lis2dw12_odr_reg {
u32 hz;
u8 value;
};
static const struct lis2dw12_odr_table_t {
struct lis2dw12_odr_reg odr_avl[LIS2DW12_MODE_COUNT][LIS2DW12_ODR_LP_LIST_NUM];
} lis2dw12_odr_table = {
.odr_avl[LIS2DW12_LP_MODE][0] = {
.hz = 0,
.value = LIS2DW12_ODR_POWER_OFF_VAL
},
.odr_avl[LIS2DW12_LP_MODE][1] = {
.hz = 1,
.value = LIS2DW12_ODR_1HZ_LP_VAL
},
.odr_avl[LIS2DW12_LP_MODE][2] = {
.hz = 12,
.value = LIS2DW12_ODR_12HZ_LP_VAL
},
.odr_avl[LIS2DW12_LP_MODE][3] = {
.hz = 25,
.value = LIS2DW12_ODR_25HZ_LP_VAL
},
.odr_avl[LIS2DW12_LP_MODE][4] = {
.hz = 50,
.value = LIS2DW12_ODR_50HZ_LP_VAL
},
.odr_avl[LIS2DW12_LP_MODE][5] = {
.hz = 100,
.value = LIS2DW12_ODR_100HZ_LP_VAL
},
.odr_avl[LIS2DW12_LP_MODE][6] = {
.hz = 200,
.value = LIS2DW12_ODR_200HZ_LP_VAL
},
.odr_avl[LIS2DW12_LP_MODE][7] = {
.hz = 400,
.value = LIS2DW12_ODR_400HZ_LP_VAL
},
.odr_avl[LIS2DW12_LP_MODE][8] = {
.hz = 800,
.value = LIS2DW12_ODR_800HZ_LP_VAL
},
.odr_avl[LIS2DW12_HR_MODE][0] = {
.hz = 0,
.value = LIS2DW12_ODR_POWER_OFF_VAL
},
.odr_avl[LIS2DW12_HR_MODE][1] = {
.hz = 12,
.value = LIS2DW12_ODR_12_5HZ_HR_VAL
},
.odr_avl[LIS2DW12_HR_MODE][2] = {
.hz = 25,
.value = LIS2DW12_ODR_25HZ_HR_VAL
},
.odr_avl[LIS2DW12_HR_MODE][3] = {
.hz = 50,
.value = LIS2DW12_ODR_50HZ_HR_VAL
},
.odr_avl[LIS2DW12_HR_MODE][4] = {
.hz = 100,
.value = LIS2DW12_ODR_100HZ_HR_VAL
},
.odr_avl[LIS2DW12_HR_MODE][5] = {
.hz = 200,
.value = LIS2DW12_ODR_200HZ_HR_VAL
},
.odr_avl[LIS2DW12_HR_MODE][6] = {
.hz = 400,
.value = LIS2DW12_ODR_400HZ_HR_VAL
},
.odr_avl[LIS2DW12_HR_MODE][7] = {
.hz = 800,
.value = LIS2DW12_ODR_800HZ_HR_VAL
},
};
struct lis2dw12_fs_reg {
unsigned int gain[LIS2DW12_MODE_COUNT];
u8 value;
int urv;
};
static struct lis2dw12_fs_table {
u8 addr;
u8 mask;
struct lis2dw12_fs_reg fs_avl[LIS2DW12_FS_LIST_NUM];
} lis2dw12_fs_table = {
.addr = LIS2DW12_CTRL6_ADDR,
.mask = LIS2DW12_FS_MASK,
.fs_avl[0] = {
.gain = {
LIS2DW12_FS_2G_GAIN_LP,
LIS2DW12_FS_2G_GAIN_HR,
},
.value = LIS2DW12_FS_2G_VAL,
.urv = 2,
},
.fs_avl[1] = {
.gain = {
LIS2DW12_FS_4G_GAIN_LP,
LIS2DW12_FS_4G_GAIN_HR,
},
.value = LIS2DW12_FS_4G_VAL,
.urv = 4,
},
.fs_avl[2] = {
.gain = {
LIS2DW12_FS_8G_GAIN_LP,
LIS2DW12_FS_8G_GAIN_LP,
},
.value = LIS2DW12_FS_8G_VAL,
.urv = 8,
},
.fs_avl[3] = {
.gain = {
LIS2DW12_FS_16G_GAIN_LP,
LIS2DW12_FS_16G_GAIN_HR,
},
.value = LIS2DW12_FS_16G_VAL,
.urv = 16,
},
};
static int lis2dw12_write_data_with_mask(struct lis2dw12_data *cdata,
u8 reg_addr, u8 mask, u8 data,
bool b_lock)
{
int err;
u8 new_data = 0x00, old_data = 0x00;
err = cdata->tf->read(cdata, reg_addr, 1, &old_data, b_lock);
if (err < 0)
return err;
new_data = ((old_data & (~mask)) | ((data << __ffs(mask)) & mask));
if (new_data == old_data)
return 1;
return cdata->tf->write(cdata, reg_addr, 1, &new_data, b_lock);
}
static int lis2dw12_input_init(struct lis2dw12_sensor_data *sdata, u16 bustype)
{
int err = 0;
sdata->input_dev = input_allocate_device();
if (!sdata->input_dev) {
dev_err(sdata->cdata->dev, "failed to allocate input device");
return -ENOMEM;
}
sdata->input_dev->name = lis2dw12_sensor_name[sdata->sindex].description;
sdata->input_dev->id.bustype = bustype;
sdata->input_dev->dev.parent = sdata->cdata->dev;
input_set_drvdata(sdata->input_dev, sdata);
__set_bit(INPUT_EVENT_TYPE, sdata->input_dev->evbit);
__set_bit(INPUT_EVENT_TIME_MSB, sdata->input_dev->mscbit);
__set_bit(INPUT_EVENT_TIME_LSB, sdata->input_dev->mscbit);
__set_bit(INPUT_EVENT_X, sdata->input_dev->mscbit);
if (sdata->sindex == LIS2DW12_ACCEL) {
__set_bit(INPUT_EVENT_Y, sdata->input_dev->mscbit);
__set_bit(INPUT_EVENT_Z, sdata->input_dev->mscbit);
}
err = input_register_device(sdata->input_dev);
if (err) {
dev_err(sdata->cdata->dev, "unable to register sensor %s\n",
sdata->name);
input_free_device(sdata->input_dev);
}
return err;
}
static void lis2dw12_input_cleanup(struct lis2dw12_sensor_data *sdata)
{
input_unregister_device(sdata->input_dev);
input_free_device(sdata->input_dev);
}
static void lis2dw12_report_3axes_event(struct lis2dw12_sensor_data *sdata,
s32 *xyz, s64 timestamp)
{
struct input_dev *input = sdata->input_dev;
if (!sdata->enabled)
return;
input_event(input, INPUT_EVENT_TYPE, INPUT_EVENT_X, xyz[0]);
input_event(input, INPUT_EVENT_TYPE, INPUT_EVENT_Y, xyz[1]);
input_event(input, INPUT_EVENT_TYPE, INPUT_EVENT_Z, xyz[2]);
input_event(input, INPUT_EVENT_TYPE, INPUT_EVENT_TIME_MSB,
timestamp >> 32);
input_event(input, INPUT_EVENT_TYPE, INPUT_EVENT_TIME_LSB,
timestamp & 0xffffffff);
input_sync(input);
}
static void lis2dw12_report_single_event(struct lis2dw12_sensor_data *sdata,
s32 data)
{
struct input_dev *input = sdata->input_dev;
if (!sdata->enabled)
return;
input_event(input, INPUT_EVENT_TYPE, INPUT_EVENT_X, data);
input_event(input, INPUT_EVENT_TYPE, INPUT_EVENT_TIME_MSB,
sdata->timestamp >> 32);
input_event(input, INPUT_EVENT_TYPE, INPUT_EVENT_TIME_LSB,
sdata->timestamp & 0xffffffff);
input_sync(input);
}
static inline s32 lis2dw12_data_align_bit(u8 ms, u8 ls, u8 power_mode)
{
if (power_mode == LIS2DW12_LP_MODE)
return (s32)(((s16)(ls | ms << 8)) >> 4);
return (s32)(((s16)(ls | ms << 8)) >> 2);
}
static u8 lis2dw12_event_irq1_value(struct lis2dw12_data *cdata)
{
u8 value = 0x0;
if (cdata->sensors[LIS2DW12_FF].enabled)
value |= LIS2DW12_INT1_FREE_FALL_MASK;
if (cdata->sensors[LIS2DW12_DOUBLE_TAP].enabled)
value |= LIS2DW12_INT1_TAP_MASK;
if (cdata->sensors[LIS2DW12_TAP].enabled)
value |= LIS2DW12_INT1_S_TAP_MASK | LIS2DW12_INT1_TAP_MASK;
if (cdata->sensors[LIS2DW12_WAKEUP].enabled)
value |= LIS2DW12_INT1_WAKEUP_MASK;
return value;
}
static int lis2dw12_update_drdy_irq(struct lis2dw12_sensor_data *sdata)
{
u8 reg_addr = LIS2DW12_CTRL4_INT1_PAD_ADDR, reg_val, reg_mask;
switch (sdata->sindex) {
case LIS2DW12_FF:
case LIS2DW12_TAP:
case LIS2DW12_DOUBLE_TAP:
case LIS2DW12_WAKEUP:
reg_val = lis2dw12_event_irq1_value(sdata->cdata);
reg_mask = LIS2DW12_INT1_EVENTS_MASK;
break;
case LIS2DW12_ACCEL:
return 0;
default:
return -EINVAL;
}
return lis2dw12_write_data_with_mask(sdata->cdata, reg_addr, reg_mask,
reg_val >> __ffs(reg_mask), true);
}
static int lis2dw12_set_fs(struct lis2dw12_sensor_data *sdata, unsigned int fs)
{
int err, i;
for (i = 0; i < LIS2DW12_FS_LIST_NUM; i++) {
if (lis2dw12_fs_table.fs_avl[i].urv == fs)
break;
}
if (i == LIS2DW12_FS_LIST_NUM)
return -EINVAL;
err = lis2dw12_write_data_with_mask(sdata->cdata, lis2dw12_fs_table.addr,
lis2dw12_fs_table.mask,
lis2dw12_fs_table.fs_avl[i].value, true);
if (err < 0)
return err;
sdata->c_gain = lis2dw12_fs_table.fs_avl[i].gain[sdata->cdata->power_mode];
return 0;
}
static inline int64_t lis2dw12_get_time_ns(void)
{
struct timespec ts;
get_monotonic_boottime(&ts);
return timespec_to_ns(&ts);
}
/* Acc data */
static int lis2dw12_get_acc_data(struct lis2dw12_data *cdata)
{
u8 data[LIS2DW12_OUT_XYZ_SIZE];
int err, xyz[3];
struct lis2dw12_sensor_data *sdata = &cdata->sensors[LIS2DW12_ACCEL];
err = cdata->tf->read(cdata, LIS2DW12_OUTX_L_ADDR, LIS2DW12_OUT_XYZ_SIZE,
data, true);
if (err < 0) {
dev_err(cdata->dev, "get acc data failed %d\n", err);
return err;
} else {
xyz[0] = lis2dw12_data_align_bit(data[1], data[0], cdata->power_mode);
xyz[1] = lis2dw12_data_align_bit(data[3], data[2], cdata->power_mode);
xyz[2] = lis2dw12_data_align_bit(data[5], data[4], cdata->power_mode);
xyz[0] *= sdata->c_gain;
xyz[1] *= sdata->c_gain;
xyz[2] *= sdata->c_gain;
lis2dw12_report_3axes_event(sdata, xyz, sdata->timestamp);
}
return 0;
}
static void lis2dw12_acc_poll_function_work(struct work_struct *input_work)
{
struct lis2dw12_sensor_data *sdata;
sdata = container_of((struct work_struct *)input_work,
struct lis2dw12_sensor_data, input_work);
lis2dw12_get_acc_data(sdata->cdata);
}
static enum hrtimer_restart lis2dw12_hrtimer_acc_callback(struct hrtimer *timer)
{
struct lis2dw12_sensor_data *sdata;
sdata = container_of((struct hrtimer *)timer, struct lis2dw12_sensor_data,
hr_timer);
sdata->timestamp = lis2dw12_get_time_ns();
queue_work(lis2dw12_workqueue, &sdata->input_work);
hrtimer_forward(timer, ktime_get(), sdata->oldktime);
return HRTIMER_RESTART;
}
/* Events data */
static irqreturn_t lis2dw12_thread_fn(int irq, void *private)
{
u8 status;
struct lis2dw12_data *cdata = private;
cdata->tf->read(cdata, LIS2DW12_STATUS_ADDR, 1, &status, true);
if (status & LIS2DW12_EVENT_MASK) {
if ((cdata->sensors[LIS2DW12_TAP].enabled) &&
(status & LIS2DW12_SINGLE_TAP_MASK)) {
cdata->sensors[LIS2DW12_TAP].timestamp = cdata->timestamp;
lis2dw12_report_single_event(&cdata->sensors[LIS2DW12_TAP], 1);
}
if ((cdata->sensors[LIS2DW12_DOUBLE_TAP].enabled) &&
(status & LIS2DW12_DOUBLE_TAP_MASK)) {
cdata->sensors[LIS2DW12_DOUBLE_TAP].timestamp = cdata->timestamp;
lis2dw12_report_single_event(&cdata->sensors[LIS2DW12_DOUBLE_TAP], 1);
}
if ((cdata->sensors[LIS2DW12_FF].enabled) &&
(status & LIS2DW12_FF_IA_MASK)) {
cdata->sensors[LIS2DW12_FF].timestamp = cdata->timestamp;
lis2dw12_report_single_event(&cdata->sensors[LIS2DW12_FF], 1);
}
if ((cdata->sensors[LIS2DW12_WAKEUP].enabled) &&
(status & LIS2DW12_WAKE_UP_IA_MASK)) {
cdata->sensors[LIS2DW12_WAKEUP].timestamp = cdata->timestamp;
lis2dw12_report_single_event(&cdata->sensors[LIS2DW12_WAKEUP], 1);
}
}
return IRQ_HANDLED;
}
static irqreturn_t lis2dw12_save_timestamp(int irq, void *private)
{
struct lis2dw12_data *cdata = (struct lis2dw12_data *)private;
cdata->timestamp = lis2dw12_get_time_ns();
return IRQ_WAKE_THREAD;
}
static int lis2dw12_update_hw_odr(struct lis2dw12_sensor_data *sdata, int odr)
{
int err, i;
struct lis2dw12_data *cdata = sdata->cdata;
u8 num_aval;
/* odr num. may differs for LP and HR mode */
num_aval = (cdata->power_mode == LIS2DW12_LP_MODE) ?
LIS2DW12_ODR_LP_LIST_NUM : LIS2DW12_ODR_HR_LIST_NUM;
for (i = 0; i < num_aval; i++) {
if (lis2dw12_odr_table.odr_avl[cdata->power_mode][i].hz >= odr)
break;
}
if (i == num_aval)
return -EINVAL;
if (sdata->c_odr == lis2dw12_odr_table.odr_avl[cdata->power_mode][i].hz)
return 0;
err = lis2dw12_write_data_with_mask(sdata->cdata,
LIS2DW12_CTRL1_ADDR,
LIS2DW12_ODR_MASK,
lis2dw12_odr_table.odr_avl[cdata->power_mode][i].value,
true);
if (err < 0)
return err;
sdata->c_odr = lis2dw12_odr_table.odr_avl[cdata->power_mode][i].hz;
return 0;
}
static int lis2dw12_configure_tap_event(struct lis2dw12_sensor_data *sdata,
bool single_tap)
{
u8 err = 0;
if (single_tap) {
err = lis2dw12_write_data_with_mask(sdata->cdata,
LIS2DW12_INT_DUR_ADDR,
LIS2DW12_INT_DUR_MASK,
LIS2DW12_INT_DUR_STAP_DEFAULT,
true);
if (err < 0)
return err;
err = lis2dw12_write_data_with_mask(sdata->cdata,
LIS2DW12_WAKE_UP_THS_ADDR,
LIS2DW12_WAKE_UP_THS_S_D_TAP_MASK,
LIS2DW12_DIS_BIT, true);
if (err < 0)
return err;
} else {
err = lis2dw12_write_data_with_mask(sdata->cdata,
LIS2DW12_INT_DUR_ADDR,
LIS2DW12_INT_DUR_MASK,
LIS2DW12_INT_DUR_DTAP_DEFAULT,
true);
if (err < 0)
return err;
err = lis2dw12_write_data_with_mask(sdata->cdata,
LIS2DW12_WAKE_UP_THS_ADDR,
LIS2DW12_WAKE_UP_THS_S_D_TAP_MASK,
LIS2DW12_EN_BIT, true);
if (err < 0)
return err;
}
return err;
}
static int _lis2dw12_enable_sensors(struct lis2dw12_sensor_data *sdata)
{
int err = 0, i;
struct lis2dw12_data *cdata = sdata->cdata;
u8 num_aval;
int64_t newTime;
err = lis2dw12_update_drdy_irq(sdata);
if (err < 0)
return err;
switch (sdata->sindex) {
case LIS2DW12_ACCEL:
num_aval = (cdata->power_mode == LIS2DW12_LP_MODE) ?
LIS2DW12_ODR_LP_LIST_NUM : LIS2DW12_ODR_HR_LIST_NUM;
for (i = 0; i < num_aval; i++) {
if (lis2dw12_odr_table.odr_avl[cdata->power_mode][i].hz >= sdata->c_odr)
break;
}
if (i == num_aval)
return -EINVAL;
err = lis2dw12_write_data_with_mask(sdata->cdata,
LIS2DW12_CTRL1_ADDR,
LIS2DW12_ODR_MASK,
lis2dw12_odr_table.odr_avl[cdata->power_mode][i].value,
true);
if (err < 0)
return err;
err = lis2dw12_write_data_with_mask(sdata->cdata,
LIS2DW12_CTRL1_ADDR,
LIS2DW12_POWER_MODE_MASK,
cdata->power_mode,
true);
if (err < 0)
return err;
sdata->c_odr = lis2dw12_odr_table.odr_avl[cdata->power_mode][i].hz;
newTime = MS_TO_NS(sdata->poll_ms);
sdata->oldktime = ktime_set(0, newTime);
hrtimer_start(&sdata->hr_timer, sdata->oldktime, HRTIMER_MODE_REL);
break;
case LIS2DW12_TAP:
lis2dw12_configure_tap_event(sdata, 1);
break;
case LIS2DW12_DOUBLE_TAP:
lis2dw12_configure_tap_event(sdata, 0);
break;
case LIS2DW12_FF:
case LIS2DW12_WAKEUP:
break;
default:
return -EINVAL;
}
return 0;
}
static int lis2dw12_enable_sensors(struct lis2dw12_sensor_data *sdata)
{
int err = 0;
if (sdata->enabled)
return 0;
sdata->enabled = true;
err = _lis2dw12_enable_sensors(sdata);
if (err < 0)
sdata->enabled = false;
return err;
}
static int _lis2dw12_disable_sensors(struct lis2dw12_sensor_data *sdata)
{
int err;
switch (sdata->sindex) {
case LIS2DW12_ACCEL:
err = lis2dw12_write_data_with_mask(sdata->cdata,
LIS2DW12_CTRL1_ADDR,
LIS2DW12_ODR_MASK,
lis2dw12_odr_table.odr_avl[sdata->cdata->power_mode][0].value,
true);
if (err < 0)
return err;
cancel_work_sync(&sdata->input_work);
hrtimer_cancel(&sdata->hr_timer);
break;
case LIS2DW12_FF:
case LIS2DW12_TAP:
case LIS2DW12_DOUBLE_TAP:
case LIS2DW12_WAKEUP:
break;
default:
return -EINVAL;
}
err = lis2dw12_update_drdy_irq(sdata);
if (err < 0)
return err;
return 0;
}
static int lis2dw12_disable_sensors(struct lis2dw12_sensor_data *sdata)
{
int err;
if (!sdata->enabled)
return 0;
sdata->enabled = false;
err = _lis2dw12_disable_sensors(sdata);
if (err < 0)
sdata->enabled = true;
return err;
}
static int lis2dw12_allocate_workqueue(struct lis2dw12_data *cdata)
{
if (!lis2dw12_workqueue)
lis2dw12_workqueue = create_workqueue(cdata->name);
if (!lis2dw12_workqueue)
return -EINVAL;
return devm_request_threaded_irq(cdata->dev, cdata->irq,
lis2dw12_save_timestamp,
lis2dw12_thread_fn,
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
cdata->name, cdata);
}
static int lis2dw12_init_sensors(struct lis2dw12_data *cdata)
{
int err, i;
struct lis2dw12_sensor_data *sdata;
for (i = 0; i < LIS2DW12_SENSORS_NUMB; i++) {
sdata = &cdata->sensors[i];
err = lis2dw12_disable_sensors(sdata);
if (err < 0)
return err;
if (sdata->sindex == LIS2DW12_ACCEL) {
err = lis2dw12_set_fs(sdata, LIS2DW12_ACCEL_FS);
if (err < 0)
return err;
}
}
hrtimer_init(&cdata->sensors[LIS2DW12_ACCEL].hr_timer, CLOCK_MONOTONIC,
HRTIMER_MODE_REL);
cdata->sensors[LIS2DW12_ACCEL].hr_timer.function =
&lis2dw12_hrtimer_acc_callback;
cdata->selftest_status = 0;
err = lis2dw12_write_data_with_mask(cdata,
LIS2DW12_CTRL2_ADDR,
LIS2DW12_SOFT_RESET_MASK,
LIS2DW12_EN_BIT, true);
if (err < 0)
return err;
err = lis2dw12_write_data_with_mask(cdata,
LIS2DW12_CTRL1_ADDR,
LIS2DW12_LP_MODE_MASK,
LIS2DW12_EN_LP_MODE_02, true);
if (err < 0)
return err;
err = lis2dw12_write_data_with_mask(cdata,
LIS2DW12_CTRL3_ADDR,
LIS2DW12_LIR_MASK,
LIS2DW12_EN_BIT, true);
if (err < 0)
return err;
err = lis2dw12_write_data_with_mask(cdata,
LIS2DW12_CTRL2_ADDR,
LIS2DW12_BDU_MASK,
LIS2DW12_EN_BIT, true);
if (err < 0)
return err;
err = lis2dw12_write_data_with_mask(sdata->cdata,
LIS2DW12_FREE_FALL_ADDR,
LIS2DW12_FREE_FALL_THS_MASK,
LIS2DW12_FREE_FALL_THS_DEFAULT, true);
if (err < 0)
return err;
err = lis2dw12_write_data_with_mask(sdata->cdata,
LIS2DW12_FREE_FALL_ADDR,
LIS2DW12_FREE_FALL_DUR_MASK,
LIS2DW12_FREE_FALL_DUR_DEFAULT, true);
if (err < 0)
return err;
err = lis2dw12_write_data_with_mask(sdata->cdata,
LIS2DW12_TAP_THS_Z_ADDR,
LIS2DW12_TAP_AXIS_MASK,
LIS2DW12_TAP_AXIS_ANABLE_ALL, true);
if (err < 0)
return err;
err = lis2dw12_write_data_with_mask(sdata->cdata,
LIS2DW12_TAP_THS_X_ADDR,
LIS2DW12_TAP_THS_MASK,
LIS2DW12_TAP_THS_DEFAULT, true);
if (err < 0)
return err;
err = lis2dw12_write_data_with_mask(sdata->cdata,
LIS2DW12_WAKE_UP_THS_ADDR,
LIS2DW12_WAKE_UP_THS_WU_MASK,
LIS2DW12_WAKE_UP_THS_WU_DEFAULT, true);
if (err < 0)
return err;
cdata->sensors[LIS2DW12_ACCEL].oldktime = ktime_set(0,
MS_TO_NS(cdata->sensors[LIS2DW12_ACCEL].poll_ms));
INIT_WORK(&cdata->sensors[LIS2DW12_ACCEL].input_work,
lis2dw12_acc_poll_function_work);
return 0;
}
static ssize_t lis2dw12_get_enable(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct lis2dw12_sensor_data *sdata = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", sdata->enabled);
}
static ssize_t lis2dw12_set_enable(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct lis2dw12_sensor_data *sdata = dev_get_drvdata(dev);
unsigned long enable;
if (kstrtoul(buf, 10, &enable))
return -EINVAL;
if (enable)
lis2dw12_enable_sensors(sdata);
else
lis2dw12_disable_sensors(sdata);
return count;
}
static ssize_t lis2dw12_get_resolution_mode(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct lis2dw12_sensor_data *sdata = dev_get_drvdata(dev);
return sprintf(buf, "%s\n",
(sdata->cdata->power_mode == LIS2DW12_LP_MODE) ? "low" : "high");
}
static ssize_t lis2dw12_set_resolution_mode(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
int i;
struct lis2dw12_sensor_data *sdata = dev_get_drvdata(dev);
for (i = 0; i < LIS2DW12_FS_LIST_NUM; i++) {
if (sdata->c_gain ==
lis2dw12_fs_table.fs_avl[i].gain[sdata->cdata->power_mode])
break;
}
if (!strncmp(buf, "low", count - 1))
sdata->cdata->power_mode = LIS2DW12_LP_MODE;
else if (!strncmp(buf, "high", count - 1))
sdata->cdata->power_mode = LIS2DW12_HR_MODE;
else
return -EINVAL;
sdata->c_gain = lis2dw12_fs_table.fs_avl[i].gain[sdata->cdata->power_mode];
return count;
}
static ssize_t lis2dw12_get_polling_rate(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct lis2dw12_sensor_data *sdata = dev_get_drvdata(dev);
return sprintf(buf, "%u\n", 1000 / sdata->c_odr);
}
static ssize_t lis2dw12_set_polling_rate(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{