#define SCA3000_MEAS_MODE_NORMAL 0x00
#define SCA3000_MEAS_MODE_OP_1 0x01
#define SCA3000_MEAS_MODE_OP_2 0x02
+#define SCA3000_MODE_MASK 0x03
/*
* In motion detection mode the accelerations are band pass filtered
.num_event_specs = 1, \
}
+static const struct iio_event_spec sca3000_freefall_event_spec = {
+ .type = IIO_EV_TYPE_MAG,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_PERIOD),
+};
+
static const struct iio_chan_spec sca3000_channels[] = {
SCA3000_CHAN(0, IIO_MOD_X),
SCA3000_CHAN(1, IIO_MOD_Y),
SCA3000_CHAN(2, IIO_MOD_Z),
+ {
+ .type = IIO_ACCEL,
+ .modified = 1,
+ .channel2 = IIO_MOD_X_AND_Y_AND_Z,
+ .scan_index = -1, /* Fake channel */
+ .event_spec = &sca3000_freefall_event_spec,
+ .num_event_specs = 1,
+ },
};
static const struct iio_chan_spec sca3000_channels_with_temp[] = {
/* No buffer support */
.scan_index = -1,
},
+ {
+ .type = IIO_ACCEL,
+ .modified = 1,
+ .channel2 = IIO_MOD_X_AND_Y_AND_Z,
+ .scan_index = -1, /* Fake channel */
+ .event_spec = &sca3000_freefall_event_spec,
+ .num_event_specs = 1,
+ },
};
static u8 sca3000_addresses[3][3] = {
static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(sca3000_read_av_freq);
/**
- * sca3000_read_thresh() - query of a threshold
+ * sca3000_read_event_value() - query of a threshold or period
**/
-static int sca3000_read_thresh(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan,
- enum iio_event_type type,
- enum iio_event_direction dir,
- enum iio_event_info info,
- int *val, int *val2)
+static int sca3000_read_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
{
int ret, i;
struct sca3000_state *st = iio_priv(indio_dev);
int num = chan->channel2;
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ mutex_lock(&st->lock);
+ ret = sca3000_read_ctrl_reg(st, sca3000_addresses[num][1]);
+ mutex_unlock(&st->lock);
+ if (ret < 0)
+ return ret;
+ *val = 0;
+ if (num == 1)
+ for_each_set_bit(i, (unsigned long *)&ret,
+ ARRAY_SIZE(st->info->mot_det_mult_y))
+ *val += st->info->mot_det_mult_y[i];
+ else
+ for_each_set_bit(i, (unsigned long *)&ret,
+ ARRAY_SIZE(st->info->mot_det_mult_xz))
+ *val += st->info->mot_det_mult_xz[i];
- mutex_lock(&st->lock);
- ret = sca3000_read_ctrl_reg(st, sca3000_addresses[num][1]);
- mutex_unlock(&st->lock);
- if (ret < 0)
- return ret;
- *val = 0;
- if (num == 1)
- for_each_set_bit(i, (unsigned long *)&ret,
- ARRAY_SIZE(st->info->mot_det_mult_y))
- *val += st->info->mot_det_mult_y[i];
- else
- for_each_set_bit(i, (unsigned long *)&ret,
- ARRAY_SIZE(st->info->mot_det_mult_xz))
- *val += st->info->mot_det_mult_xz[i];
-
- return IIO_VAL_INT;
+ return IIO_VAL_INT;
+ case IIO_EV_INFO_PERIOD:
+ *val = 0;
+ *val2 = 226000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
}
/**
- * sca3000_write_thresh() control of threshold
+ * sca3000_write_value() control of threshold and period
**/
-static int sca3000_write_thresh(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan,
- enum iio_event_type type,
- enum iio_event_direction dir,
- enum iio_event_info info,
- int val, int val2)
+static int sca3000_write_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
{
struct sca3000_state *st = iio_priv(indio_dev);
int num = chan->channel2;
int i;
u8 nonlinear = 0;
- if (num == 1) {
+ if (num == IIO_MOD_Y) {
i = ARRAY_SIZE(st->info->mot_det_mult_y);
while (i > 0)
if (val >= st->info->mot_det_mult_y[--i]) {
/* read current value of mode register */
mutex_lock(&st->lock);
+
ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
if (ret)
goto error_ret;
- if ((st->rx[0] & protect_mask) != SCA3000_MEAS_MODE_MOT_DET) {
- ret = 0;
- } else {
- ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL);
- if (ret < 0)
- goto error_ret;
- /* only supporting logical or's for now */
- ret = !!(ret & sca3000_addresses[num][2]);
+ switch (chan->channel2) {
+ case IIO_MOD_X_AND_Y_AND_Z:
+ ret = !!(st->rx[0] & SCA3000_FREE_FALL_DETECT);
+ break;
+ case IIO_MOD_X:
+ case IIO_MOD_Y:
+ case IIO_MOD_Z:
+ /*
+ * Motion detection mode cannot run at the same time as
+ * acceleration data being read.
+ */
+ if ((st->rx[0] & protect_mask) != SCA3000_MEAS_MODE_MOT_DET) {
+ ret = 0;
+ } else {
+ ret = sca3000_read_ctrl_reg(st,
+ SCA3000_REG_CTRL_SEL_MD_CTRL);
+ if (ret < 0)
+ goto error_ret;
+ /* only supporting logical or's for now */
+ ret = !!(ret & sca3000_addresses[num][2]);
+ }
+ break;
+ default:
+ ret = -EINVAL;
}
+
error_ret:
mutex_unlock(&st->lock);
return ret;
}
-/**
- * sca3000_query_free_fall_mode() is free fall mode enabled
- **/
-static ssize_t sca3000_query_free_fall_mode(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static int sca3000_freefall_set_state(struct iio_dev *indio_dev, int state)
{
- int ret;
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct sca3000_state *st = iio_priv(indio_dev);
- int val;
-
- mutex_lock(&st->lock);
- ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
- val = st->rx[0];
- mutex_unlock(&st->lock);
- if (ret < 0)
- return ret;
- return sprintf(buf, "%d\n", !!(val & SCA3000_FREE_FALL_DETECT));
-}
-
-/**
- * sca3000_set_free_fall_mode() simple on off control for free fall int
- *
- * In these chips the free fall detector should send an interrupt if
- * the device falls more than 25cm. This has not been tested due
- * to fragile wiring.
- **/
-static ssize_t sca3000_set_free_fall_mode(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- struct sca3000_state *st = iio_priv(indio_dev);
- u8 val;
int ret;
- u8 protect_mask = SCA3000_FREE_FALL_DETECT;
-
- mutex_lock(&st->lock);
- ret = kstrtou8(buf, 10, &val);
- if (ret)
- goto error_ret;
/* read current value of mode register */
ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
if (ret)
- goto error_ret;
+ return ret;
/* if off and should be on */
- if (val && !(st->rx[0] & protect_mask))
- ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
- (st->rx[0] | SCA3000_FREE_FALL_DETECT));
+ if (state && !(st->rx[0] & SCA3000_FREE_FALL_DETECT))
+ return sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
+ st->rx[0] | SCA3000_FREE_FALL_DETECT);
/* if on and should be off */
- else if (!val && (st->rx[0] & protect_mask))
- ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
- (st->rx[0] & ~protect_mask));
-error_ret:
- mutex_unlock(&st->lock);
-
- return ret ? ret : len;
+ else if (!state && (st->rx[0] & SCA3000_FREE_FALL_DETECT))
+ return sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
+ st->rx[0] & ~SCA3000_FREE_FALL_DETECT);
+ else
+ return 0;
}
-/**
- * sca3000_write_event_config() simple on off control for motion detector
- *
- * This is a per axis control, but enabling any will result in the
- * motion detector unit being enabled.
- * N.B. enabling motion detector stops normal data acquisition.
- * There is a complexity in knowing which mode to return to when
- * this mode is disabled. Currently normal mode is assumed.
- **/
-static int sca3000_write_event_config(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan,
- enum iio_event_type type,
- enum iio_event_direction dir,
- int state)
+static int sca3000_motion_detect_set_state(struct iio_dev *indio_dev, int axis,
+ int state)
{
struct sca3000_state *st = iio_priv(indio_dev);
int ret, ctrlval;
- u8 protect_mask = 0x03;
- int num = chan->channel2;
- mutex_lock(&st->lock);
/*
* First read the motion detector config to find out if
* this axis is on
*/
ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL);
if (ret < 0)
- goto exit_point;
+ return ret;
ctrlval = ret;
/* if off and should be on */
- if (state && !(ctrlval & sca3000_addresses[num][2])) {
+ if (state && !(ctrlval & sca3000_addresses[axis][2])) {
ret = sca3000_write_ctrl_reg(st,
SCA3000_REG_CTRL_SEL_MD_CTRL,
ctrlval |
- sca3000_addresses[num][2]);
+ sca3000_addresses[axis][2]);
if (ret)
- goto exit_point;
+ return ret;
st->mo_det_use_count++;
- } else if (!state && (ctrlval & sca3000_addresses[num][2])) {
+ } else if (!state && (ctrlval & sca3000_addresses[axis][2])) {
ret = sca3000_write_ctrl_reg(st,
SCA3000_REG_CTRL_SEL_MD_CTRL,
ctrlval &
- ~(sca3000_addresses[num][2]));
+ ~(sca3000_addresses[axis][2]));
if (ret)
- goto exit_point;
+ return ret;
st->mo_det_use_count--;
}
/* read current value of mode register */
ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
if (ret)
- goto exit_point;
+ return ret;
/* if off and should be on */
if ((st->mo_det_use_count) &&
- ((st->rx[0] & protect_mask) != SCA3000_MEAS_MODE_MOT_DET))
- ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
- (st->rx[0] & ~protect_mask)
+ ((st->rx[0] & SCA3000_MODE_MASK) != SCA3000_MEAS_MODE_MOT_DET))
+ return sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
+ (st->rx[0] & ~SCA3000_MODE_MASK)
| SCA3000_MEAS_MODE_MOT_DET);
/* if on and should be off */
else if (!(st->mo_det_use_count) &&
- ((st->rx[0] & protect_mask) == SCA3000_MEAS_MODE_MOT_DET))
- ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
- (st->rx[0] & ~protect_mask));
-exit_point:
+ ((st->rx[0] & SCA3000_MODE_MASK) == SCA3000_MEAS_MODE_MOT_DET))
+ return sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
+ st->rx[0] & SCA3000_MODE_MASK);
+ else
+ return 0;
+}
+
+/**
+ * sca3000_write_event_config() simple on off control for motion detector
+ *
+ * This is a per axis control, but enabling any will result in the
+ * motion detector unit being enabled.
+ * N.B. enabling motion detector stops normal data acquisition.
+ * There is a complexity in knowing which mode to return to when
+ * this mode is disabled. Currently normal mode is assumed.
+ **/
+static int sca3000_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int state)
+{
+ struct sca3000_state *st = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&st->lock);
+ switch (chan->channel2) {
+ case IIO_MOD_X_AND_Y_AND_Z:
+ ret = sca3000_freefall_set_state(indio_dev, state);
+ break;
+
+ case IIO_MOD_X:
+ case IIO_MOD_Y:
+ case IIO_MOD_Z:
+ ret = sca3000_motion_detect_set_state(indio_dev, chan->channel2,
+ state);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
mutex_unlock(&st->lock);
return ret;
}
-/* Free fall detector related event attribute */
-static IIO_DEVICE_ATTR_NAMED(accel_xayaz_mag_falling_en,
- in_accel_x & y & z_mag_falling_en,
- S_IRUGO | S_IWUSR,
- sca3000_query_free_fall_mode,
- sca3000_set_free_fall_mode,
- 0);
-
-static IIO_CONST_ATTR_NAMED(accel_xayaz_mag_falling_period,
- in_accel_x & y & z_mag_falling_period,
- "0.226");
-
-static struct attribute *sca3000_event_attributes[] = {
- &iio_dev_attr_accel_xayaz_mag_falling_en.dev_attr.attr,
- &iio_const_attr_accel_xayaz_mag_falling_period.dev_attr.attr,
- NULL,
-};
-
-static struct attribute_group sca3000_event_attribute_group = {
- .attrs = sca3000_event_attributes,
- .name = "events",
-};
-
static int sca3000_configure_ring(struct iio_dev *indio_dev)
{
struct iio_buffer *buffer;
.attrs = &sca3000_attribute_group,
.read_raw = &sca3000_read_raw,
.write_raw = &sca3000_write_raw,
- .event_attrs = &sca3000_event_attribute_group,
- .read_event_value = &sca3000_read_thresh,
- .write_event_value = &sca3000_write_thresh,
+ .read_event_value = &sca3000_read_event_value,
+ .write_event_value = &sca3000_write_event_value,
.read_event_config = &sca3000_read_event_config,
.write_event_config = &sca3000_write_event_config,
.driver_module = THIS_MODULE,
projects / linux-platform-drivers-x86.git / commitdiff