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105 lines
2.6 KiB
105 lines
2.6 KiB
/* |
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* STMicroelectronics gyroscopes driver |
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* |
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* Copyright 2012-2013 STMicroelectronics Inc. |
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* |
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* Denis Ciocca <denis.ciocca@st.com> |
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* |
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* Licensed under the GPL-2. |
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*/ |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/stat.h> |
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#include <linux/interrupt.h> |
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#include <linux/i2c.h> |
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#include <linux/delay.h> |
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#include <linux/iio/iio.h> |
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#include <linux/iio/buffer.h> |
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#include <linux/iio/trigger_consumer.h> |
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#include <linux/iio/triggered_buffer.h> |
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#include <linux/iio/common/st_sensors.h> |
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#include "st_gyro.h" |
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int st_gyro_trig_set_state(struct iio_trigger *trig, bool state) |
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{ |
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struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); |
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return st_sensors_set_dataready_irq(indio_dev, state); |
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} |
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static int st_gyro_buffer_preenable(struct iio_dev *indio_dev) |
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{ |
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return st_sensors_set_enable(indio_dev, true); |
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} |
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static int st_gyro_buffer_postenable(struct iio_dev *indio_dev) |
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{ |
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int err; |
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struct st_sensor_data *gdata = iio_priv(indio_dev); |
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gdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); |
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if (gdata->buffer_data == NULL) { |
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err = -ENOMEM; |
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goto allocate_memory_error; |
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} |
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err = st_sensors_set_axis_enable(indio_dev, |
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(u8)indio_dev->active_scan_mask[0]); |
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if (err < 0) |
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goto st_gyro_buffer_postenable_error; |
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err = iio_triggered_buffer_postenable(indio_dev); |
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if (err < 0) |
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goto st_gyro_buffer_postenable_error; |
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return err; |
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st_gyro_buffer_postenable_error: |
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kfree(gdata->buffer_data); |
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allocate_memory_error: |
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return err; |
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} |
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static int st_gyro_buffer_predisable(struct iio_dev *indio_dev) |
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{ |
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int err; |
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struct st_sensor_data *gdata = iio_priv(indio_dev); |
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err = iio_triggered_buffer_predisable(indio_dev); |
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if (err < 0) |
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goto st_gyro_buffer_predisable_error; |
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err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS); |
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if (err < 0) |
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goto st_gyro_buffer_predisable_error; |
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err = st_sensors_set_enable(indio_dev, false); |
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st_gyro_buffer_predisable_error: |
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kfree(gdata->buffer_data); |
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return err; |
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} |
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static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = { |
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.preenable = &st_gyro_buffer_preenable, |
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.postenable = &st_gyro_buffer_postenable, |
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.predisable = &st_gyro_buffer_predisable, |
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}; |
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int st_gyro_allocate_ring(struct iio_dev *indio_dev) |
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{ |
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return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, |
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&st_sensors_trigger_handler, &st_gyro_buffer_setup_ops); |
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} |
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void st_gyro_deallocate_ring(struct iio_dev *indio_dev) |
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{ |
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iio_triggered_buffer_cleanup(indio_dev); |
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} |
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MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); |
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MODULE_DESCRIPTION("STMicroelectronics gyroscopes buffer"); |
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MODULE_LICENSE("GPL v2");
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