#include <linux/iio/iio.h>
#include <linux/iio/buffer.h>
#include <linux/iio/events.h>
+#include <linux/iio/sysfs.h>
#include <linux/iio/trigger.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
static const int bma400_osr_range[] = { 0, 1, 3 };
+static int tap_reset_timeout[BMA400_TAP_TIM_LIST_LEN] = {
+ 300000,
+ 400000,
+ 500000,
+ 600000
+};
+
+static int tap_max2min_time[BMA400_TAP_TIM_LIST_LEN] = {
+ 30000,
+ 45000,
+ 60000,
+ 90000
+};
+
+static int double_tap2_min_delay[BMA400_TAP_TIM_LIST_LEN] = {
+ 20000,
+ 40000,
+ 60000,
+ 80000
+};
+
/* See the ACC_CONFIG0 section of the datasheet */
enum bma400_power_mode {
POWER_MODE_SLEEP = 0x00,
bool step_event_en;
bool activity_event_en;
unsigned int generic_event_en;
+ unsigned int tap_event_en_bitmask;
/* Correct time stamp alignment */
struct {
__le16 buff[3];
BIT(IIO_EV_INFO_HYSTERESIS) |
BIT(IIO_EV_INFO_ENABLE),
},
+ {
+ .type = IIO_EV_TYPE_GESTURE,
+ .dir = IIO_EV_DIR_SINGLETAP,
+ .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_RESET_TIMEOUT),
+ },
+ {
+ .type = IIO_EV_TYPE_GESTURE,
+ .dir = IIO_EV_DIR_DOUBLETAP,
+ .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_RESET_TIMEOUT) |
+ BIT(IIO_EV_INFO_TAP2_MIN_DELAY),
+ },
+};
+
+static int usec_to_tapreg_raw(int usec, const int *time_list)
+{
+ int index;
+
+ for (index = 0; index < BMA400_TAP_TIM_LIST_LEN; index++) {
+ if (usec == time_list[index])
+ return index;
+ }
+ return -EINVAL;
+}
+
+static ssize_t in_accel_gesture_tap_maxtomin_time_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct bma400_data *data = iio_priv(indio_dev);
+ int ret, reg_val, raw, vals[2];
+
+ ret = regmap_read(data->regmap, BMA400_TAP_CONFIG1, ®_val);
+ if (ret)
+ return ret;
+
+ raw = FIELD_GET(BMA400_TAP_TICSTH_MSK, reg_val);
+ vals[0] = 0;
+ vals[1] = tap_max2min_time[raw];
+
+ return iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, vals);
+}
+
+static ssize_t in_accel_gesture_tap_maxtomin_time_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct bma400_data *data = iio_priv(indio_dev);
+ int ret, val_int, val_fract, raw;
+
+ ret = iio_str_to_fixpoint(buf, 100000, &val_int, &val_fract);
+ if (ret)
+ return ret;
+
+ raw = usec_to_tapreg_raw(val_fract, tap_max2min_time);
+ if (raw < 0)
+ return -EINVAL;
+
+ ret = regmap_update_bits(data->regmap, BMA400_TAP_CONFIG1,
+ BMA400_TAP_TICSTH_MSK,
+ FIELD_PREP(BMA400_TAP_TICSTH_MSK, raw));
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static IIO_DEVICE_ATTR_RW(in_accel_gesture_tap_maxtomin_time, 0);
+
+/*
+ * Tap interrupts works with 200 Hz input data rate and the time based tap
+ * controls are in the terms of data samples so the below calculation is
+ * used to convert the configuration values into seconds.
+ * e.g.:
+ * 60 data samples * 0.005 ms = 0.3 seconds.
+ * 80 data samples * 0.005 ms = 0.4 seconds.
+ */
+
+/* quiet configuration values in seconds */
+static IIO_CONST_ATTR(in_accel_gesture_tap_reset_timeout_available,
+ "0.3 0.4 0.5 0.6");
+
+/* tics_th configuration values in seconds */
+static IIO_CONST_ATTR(in_accel_gesture_tap_maxtomin_time_available,
+ "0.03 0.045 0.06 0.09");
+
+/* quiet_dt configuration values in seconds */
+static IIO_CONST_ATTR(in_accel_gesture_doubletap_tap2_min_delay_available,
+ "0.02 0.04 0.06 0.08");
+
+/* List of sensitivity values available to configure tap interrupts */
+static IIO_CONST_ATTR(in_accel_gesture_tap_value_available, "0 1 2 3 4 5 6 7");
+
+static struct attribute *bma400_event_attributes[] = {
+ &iio_const_attr_in_accel_gesture_tap_value_available.dev_attr.attr,
+ &iio_const_attr_in_accel_gesture_tap_reset_timeout_available.dev_attr.attr,
+ &iio_const_attr_in_accel_gesture_tap_maxtomin_time_available.dev_attr.attr,
+ &iio_const_attr_in_accel_gesture_doubletap_tap2_min_delay_available.dev_attr.attr,
+ &iio_dev_attr_in_accel_gesture_tap_maxtomin_time.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group bma400_event_attribute_group = {
+ .attrs = bma400_event_attributes,
};
#define BMA400_ACC_CHANNEL(_index, _axis) { \
case IIO_EV_DIR_FALLING:
return FIELD_GET(BMA400_INT_GEN2_MSK,
data->generic_event_en);
+ case IIO_EV_DIR_SINGLETAP:
+ return FIELD_GET(BMA400_S_TAP_MSK,
+ data->tap_event_en_bitmask);
+ case IIO_EV_DIR_DOUBLETAP:
+ return FIELD_GET(BMA400_D_TAP_MSK,
+ data->tap_event_en_bitmask);
default:
return -EINVAL;
}
return 0;
}
+static int bma400_tap_event_en(struct bma400_data *data,
+ enum iio_event_direction dir, int state)
+{
+ unsigned int mask, field_value;
+ int ret;
+
+ /*
+ * Tap interrupts can be configured only in normal mode.
+ * See table in section 4.3 "Power modes - performance modes" of
+ * datasheet v1.2.
+ */
+ if (data->power_mode != POWER_MODE_NORMAL)
+ return -EINVAL;
+
+ /*
+ * Tap interrupts are operating with a data rate of 200Hz.
+ * See section 4.7 "Tap sensing interrupt" in datasheet v1.2.
+ */
+ if (data->sample_freq.hz != 200 && state) {
+ dev_err(data->dev, "Invalid data rate for tap interrupts.\n");
+ return -EINVAL;
+ }
+
+ ret = regmap_update_bits(data->regmap, BMA400_INT12_MAP_REG,
+ BMA400_S_TAP_MSK,
+ FIELD_PREP(BMA400_S_TAP_MSK, state));
+ if (ret)
+ return ret;
+
+ switch (dir) {
+ case IIO_EV_DIR_SINGLETAP:
+ mask = BMA400_S_TAP_MSK;
+ set_mask_bits(&field_value, BMA400_S_TAP_MSK,
+ FIELD_PREP(BMA400_S_TAP_MSK, state));
+ break;
+ case IIO_EV_DIR_DOUBLETAP:
+ mask = BMA400_D_TAP_MSK;
+ set_mask_bits(&field_value, BMA400_D_TAP_MSK,
+ FIELD_PREP(BMA400_D_TAP_MSK, state));
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = regmap_update_bits(data->regmap, BMA400_INT_CONFIG1_REG, mask,
+ field_value);
+ if (ret)
+ return ret;
+
+ set_mask_bits(&data->tap_event_en_bitmask, mask, field_value);
+
+ return 0;
+}
+
+static int bma400_disable_adv_interrupt(struct bma400_data *data)
+{
+ int ret;
+
+ ret = regmap_write(data->regmap, BMA400_INT_CONFIG0_REG, 0);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(data->regmap, BMA400_INT_CONFIG1_REG, 0);
+ if (ret)
+ return ret;
+
+ data->tap_event_en_bitmask = 0;
+ data->generic_event_en = 0;
+ data->step_event_en = false;
+ data->activity_event_en = false;
+
+ return 0;
+}
+
static int bma400_write_event_config(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan,
enum iio_event_type type,
switch (chan->type) {
case IIO_ACCEL:
- mutex_lock(&data->mutex);
- ret = bma400_activity_event_en(data, dir, state);
- mutex_unlock(&data->mutex);
- return ret;
+ switch (type) {
+ case IIO_EV_TYPE_MAG:
+ mutex_lock(&data->mutex);
+ ret = bma400_activity_event_en(data, dir, state);
+ mutex_unlock(&data->mutex);
+ return ret;
+ case IIO_EV_TYPE_GESTURE:
+ mutex_lock(&data->mutex);
+ ret = bma400_tap_event_en(data, dir, state);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
case IIO_STEPS:
mutex_lock(&data->mutex);
ret = bma400_steps_event_enable(data, state);
int *val, int *val2)
{
struct bma400_data *data = iio_priv(indio_dev);
- int ret, reg;
+ int ret, reg, reg_val, raw;
- switch (chan->type) {
- case IIO_ACCEL:
+ if (chan->type != IIO_ACCEL)
+ return -EINVAL;
+
+ switch (type) {
+ case IIO_EV_TYPE_MAG:
reg = get_gen_config_reg(dir);
if (reg < 0)
return -EINVAL;
default:
return -EINVAL;
}
+ case IIO_EV_TYPE_GESTURE:
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ ret = regmap_read(data->regmap, BMA400_TAP_CONFIG,
+ ®_val);
+ if (ret)
+ return ret;
+
+ *val = FIELD_GET(BMA400_TAP_SEN_MSK, reg_val);
+ return IIO_VAL_INT;
+ case IIO_EV_INFO_RESET_TIMEOUT:
+ ret = regmap_read(data->regmap, BMA400_TAP_CONFIG1,
+ ®_val);
+ if (ret)
+ return ret;
+
+ raw = FIELD_GET(BMA400_TAP_QUIET_MSK, reg_val);
+ *val = 0;
+ *val2 = tap_reset_timeout[raw];
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_EV_INFO_TAP2_MIN_DELAY:
+ ret = regmap_read(data->regmap, BMA400_TAP_CONFIG1,
+ ®_val);
+ if (ret)
+ return ret;
+
+ raw = FIELD_GET(BMA400_TAP_QUIETDT_MSK, reg_val);
+ *val = 0;
+ *val2 = double_tap2_min_delay[raw];
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
default:
return -EINVAL;
}
int val, int val2)
{
struct bma400_data *data = iio_priv(indio_dev);
- int reg, ret;
+ int reg, ret, raw;
- switch (chan->type) {
- case IIO_ACCEL:
+ if (chan->type != IIO_ACCEL)
+ return -EINVAL;
+
+ switch (type) {
+ case IIO_EV_TYPE_MAG:
reg = get_gen_config_reg(dir);
if (reg < 0)
return -EINVAL;
default:
return -EINVAL;
}
+ case IIO_EV_TYPE_GESTURE:
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ if (val < 0 || val > 7)
+ return -EINVAL;
+
+ return regmap_update_bits(data->regmap,
+ BMA400_TAP_CONFIG,
+ BMA400_TAP_SEN_MSK,
+ FIELD_PREP(BMA400_TAP_SEN_MSK,
+ val));
+ case IIO_EV_INFO_RESET_TIMEOUT:
+ raw = usec_to_tapreg_raw(val2, tap_reset_timeout);
+ if (raw < 0)
+ return -EINVAL;
+
+ return regmap_update_bits(data->regmap,
+ BMA400_TAP_CONFIG1,
+ BMA400_TAP_QUIET_MSK,
+ FIELD_PREP(BMA400_TAP_QUIET_MSK,
+ raw));
+ case IIO_EV_INFO_TAP2_MIN_DELAY:
+ raw = usec_to_tapreg_raw(val2, double_tap2_min_delay);
+ if (raw < 0)
+ return -EINVAL;
+
+ return regmap_update_bits(data->regmap,
+ BMA400_TAP_CONFIG1,
+ BMA400_TAP_QUIETDT_MSK,
+ FIELD_PREP(BMA400_TAP_QUIETDT_MSK,
+ raw));
+ default:
+ return -EINVAL;
+ }
default:
return -EINVAL;
}
.write_event_config = bma400_write_event_config,
.write_event_value = bma400_write_event_value,
.read_event_value = bma400_read_event_value,
+ .event_attrs = &bma400_event_attribute_group,
};
static const struct iio_trigger_ops bma400_trigger_ops = {
if (ret || !data->status)
goto unlock_err;
+ /*
+ * Disable all advance interrupts if interrupt engine overrun occurs.
+ * See section 4.7 "Interrupt engine overrun" in datasheet v1.2.
+ */
+ if (FIELD_GET(BMA400_INT_ENG_OVRUN_MSK, le16_to_cpu(data->status))) {
+ bma400_disable_adv_interrupt(data);
+ dev_err(data->dev, "Interrupt engine overrun\n");
+ goto unlock_err;
+ }
+
+ if (FIELD_GET(BMA400_INT_S_TAP_MSK, le16_to_cpu(data->status)))
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL, 0,
+ IIO_MOD_X_OR_Y_OR_Z,
+ IIO_EV_TYPE_GESTURE,
+ IIO_EV_DIR_SINGLETAP),
+ timestamp);
+
+ if (FIELD_GET(BMA400_INT_D_TAP_MSK, le16_to_cpu(data->status)))
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(IIO_ACCEL, 0,
+ IIO_MOD_X_OR_Y_OR_Z,
+ IIO_EV_TYPE_GESTURE,
+ IIO_EV_DIR_DOUBLETAP),
+ timestamp);
+
if (FIELD_GET(BMA400_INT_GEN1_MSK, le16_to_cpu(data->status)))
ev_dir = IIO_EV_DIR_RISING;
EXPORT_SYMBOL_NS(bma400_probe, IIO_BMA400);
MODULE_AUTHOR("Dan Robertson <dan@dlrobertson.com>");
+MODULE_AUTHOR("Jagath Jog J <jagathjog1996@gmail.com>");
MODULE_DESCRIPTION("Bosch BMA400 triaxial acceleration sensor core");
MODULE_LICENSE("GPL");
projects / ceph-client.git / commitdiff