#include <linux/iio/iio.h>
#include <linux/iio/kfifo_buf.h>
#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
}
}
+int cros_ec_sensors_push_data(struct iio_dev *indio_dev,
+ s16 *data,
+ s64 timestamp)
+{
+ struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
+ s16 *out;
+ s64 delta;
+ unsigned int i;
+
+ /*
+ * Ignore samples if the buffer is not set: it is needed if the ODR is
+ * set but the buffer is not enabled yet.
+ */
+ if (!iio_buffer_enabled(indio_dev))
+ return 0;
+
+ out = (s16 *)st->samples;
+ for_each_set_bit(i,
+ indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ *out = data[i];
+ out++;
+ }
+
+ if (iio_device_get_clock(indio_dev) != CLOCK_BOOTTIME)
+ delta = iio_get_time_ns(indio_dev) - cros_ec_get_time_ns();
+ else
+ delta = 0;
+
+ iio_push_to_buffers_with_timestamp(indio_dev, st->samples,
+ timestamp + delta);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cros_ec_sensors_push_data);
+
+static void cros_ec_sensors_core_clean(void *arg)
+{
+ struct platform_device *pdev = (struct platform_device *)arg;
+ struct cros_ec_sensorhub *sensor_hub =
+ dev_get_drvdata(pdev->dev.parent);
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
+ u8 sensor_num = st->param.info.sensor_num;
+
+ cros_ec_sensorhub_unregister_push_data(sensor_hub, sensor_num);
+}
+
/**
* cros_ec_sensors_core_init() - basic initialization of the core structure
* @pdev: platform device created for the sensors
* @indio_dev: iio device structure of the device
* @physical_device: true if the device refers to a physical device
+ * @trigger_capture: function pointer to call buffer is triggered,
+ * for backward compatibility.
+ * @push_data: function to call when cros_ec_sensorhub receives
+ * a sample for that sensor.
*
* Return: 0 on success, -errno on failure.
*/
int cros_ec_sensors_core_init(struct platform_device *pdev,
struct iio_dev *indio_dev,
- bool physical_device)
+ bool physical_device,
+ cros_ec_sensors_capture_t trigger_capture,
+ cros_ec_sensorhub_push_data_cb_t push_data)
{
struct device *dev = &pdev->dev;
struct cros_ec_sensors_core_state *state = iio_priv(indio_dev);
indio_dev->name = pdev->name;
if (physical_device) {
- indio_dev->modes = INDIO_DIRECT_MODE;
-
state->param.cmd = MOTIONSENSE_CMD_INFO;
state->param.info.sensor_num = sensor_platform->sensor_num;
ret = cros_ec_motion_send_host_cmd(state, 0);
state->frequencies[2] =
state->resp->info_3.max_frequency;
}
+
+ if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO)) {
+ /*
+ * Create a software buffer, feed by the EC FIFO.
+ * We can not use trigger here, as events are generated
+ * as soon as sample_frequency is set.
+ */
+ struct iio_buffer *buffer;
+
+ buffer = devm_iio_kfifo_allocate(dev);
+ if (!buffer)
+ return -ENOMEM;
+
+ iio_device_attach_buffer(indio_dev, buffer);
+ indio_dev->modes = INDIO_BUFFER_SOFTWARE;
+
+ ret = cros_ec_sensorhub_register_push_data(
+ sensor_hub, sensor_platform->sensor_num,
+ indio_dev, push_data);
+ if (ret)
+ return ret;
+
+ ret = devm_add_action_or_reset(
+ dev, cros_ec_sensors_core_clean, pdev);
+ if (ret)
+ return ret;
+
+ /* Timestamp coming from FIFO are in ns since boot. */
+ ret = iio_device_set_clock(indio_dev, CLOCK_BOOTTIME);
+ if (ret)
+ return ret;
+ } else {
+ /*
+ * The only way to get samples in buffer is to set a
+ * software tigger (systrig, hrtimer).
+ */
+ ret = devm_iio_triggered_buffer_setup(
+ dev, indio_dev, NULL, trigger_capture,
+ NULL);
+ if (ret)
+ return ret;
+ }
}
return 0;
#include <linux/irqreturn.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
+#include <linux/platform_data/cros_ec_sensorhub.h>
enum {
CROS_EC_SENSOR_X,
/* Minimum sampling period to use when device is suspending */
#define CROS_EC_MIN_SUSPEND_SAMPLING_FREQUENCY 1000 /* 1 second */
+typedef irqreturn_t (*cros_ec_sensors_capture_t)(int irq, void *p);
+
/**
* struct cros_ec_sensors_core_state - state data for EC sensors IIO driver
* @ec: cros EC device structure
struct platform_device;
int cros_ec_sensors_core_init(struct platform_device *pdev,
- struct iio_dev *indio_dev, bool physical_device);
+ struct iio_dev *indio_dev, bool physical_device,
+ cros_ec_sensors_capture_t trigger_capture,
+ cros_ec_sensorhub_push_data_cb_t push_data);
irqreturn_t cros_ec_sensors_capture(int irq, void *p);
+int cros_ec_sensors_push_data(struct iio_dev *indio_dev,
+ s16 *data,
+ s64 timestamp);
int cros_ec_motion_send_host_cmd(struct cros_ec_sensors_core_state *st,
u16 opt_length);
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