@@ -0,0 +1,451 @@
+/*
+ * HID Sensors Driver
+ * Copyright (c) 2012, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/hid-sensor-hub.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/sysfs.h>
+#include "../common/hid-sensors/hid-sensor-attributes.h"
+#include "../common/hid-sensors/hid-sensor-trigger.h"
+
+/*Format: HID-SENSOR-usage_id_in_hex*/
+#define DRIVER_NAME "HID-SENSOR-200076"
+
+#define CHANNEL_SCAN_INDEX_X 0
+#define CHANNEL_SCAN_INDEX_Y 1
+#define CHANNEL_SCAN_INDEX_Z 2
+
+struct gyro_3d_sample {
+ u32 gyro_x;
+ u32 gyro_y;
+ u32 gyro_z;
+} __packed;
+
+struct gyro_3d_state {
+ struct hid_sensor_hub_attribute_info gyro_x;
+ struct hid_sensor_hub_attribute_info gyro_y;
+ struct hid_sensor_hub_attribute_info gyro_z;
+ struct gyro_3d_sample gyro_sample_data;
+};
+
+/* Channel definitions */
+static struct iio_chan_spec gyro_3d_channels[] = {
+ {
+ .type = IIO_ANGL_VEL,
+ .modified = 1,
+ .channel2 = IIO_MOD_X,
+ .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT |
+ IIO_CHAN_INFO_SCALE_SHARED_BIT,
+ .scan_index = CHANNEL_SCAN_INDEX_X,
+ }, {
+ .type = IIO_ANGL_VEL,
+ .modified = 1,
+ .channel2 = IIO_MOD_Y,
+ .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT |
+ IIO_CHAN_INFO_SCALE_SHARED_BIT,
+ .scan_index = CHANNEL_SCAN_INDEX_Y,
+ }, {
+ .type = IIO_ANGL_VEL,
+ .modified = 1,
+ .channel2 = IIO_MOD_Z,
+ .info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT |
+ IIO_CHAN_INFO_SCALE_SHARED_BIT,
+ .scan_index = CHANNEL_SCAN_INDEX_Z,
+ }
+};
+
+/* Adjust channel real bits based on report descriptor */
+static void gyro_3d_adjust_channel_bit_mask(int channel, int size)
+{
+ gyro_3d_channels[channel].scan_type.sign = 's';
+ gyro_3d_channels[channel].scan_type.realbits = size * 8;
+ gyro_3d_channels[channel].scan_type.storagebits = sizeof(u32) * 8;
+}
+
+/* Channel read_raw handler */
+static int gyro_3d_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2,
+ long mask)
+{
+ struct hid_sensor_attributes *st = iio_priv(indio_dev);
+ struct gyro_3d_state *gyro_state =
+ (struct gyro_3d_state *)st->private;
+ int report_id = -1;
+ u32 address;
+
+ *val = 0;
+ *val2 = 0;
+ switch (mask) {
+ case 0:
+ switch (chan->scan_index) {
+ case CHANNEL_SCAN_INDEX_X:
+ report_id = gyro_state->gyro_x.report_id;
+ address =
+ HID_USAGE_SENSOR_DATA_MOTION_ANGULAR_VELOCITY_X_AXIS;
+ break;
+ case CHANNEL_SCAN_INDEX_Y:
+ report_id = gyro_state->gyro_y.report_id;
+ address =
+ HID_USAGE_SENSOR_DATA_MOTION_ANGULAR_VELOCITY_Y_AXIS;
+ break;
+ case CHANNEL_SCAN_INDEX_Z:
+ report_id = gyro_state->gyro_z.report_id;
+ address =
+ HID_USAGE_SENSOR_DATA_MOTION_ANGULAR_VELOCITY_Z_AXIS;
+ break;
+ default:
+ report_id = -1;
+ break;
+ }
+ if (report_id >= 0)
+ *val = sensor_hub_input_attr_get_raw_value(
+ st->hsdev,
+ HID_USAGE_SENSOR_GYRO_3D, address,
+ report_id);
+ else
+ *val = 0;
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ *val = gyro_state->gyro_x.units;
+ break;
+ case IIO_CHAN_INFO_OFFSET:
+ *val = gyro_state->gyro_x.unit_expo;
+ break;
+ default:
+ break;
+ }
+ return IIO_VAL_INT;
+}
+
+
+
+static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
+ hid_sensor_read_samp_freq,
+ hid_sensor_write_samp_freq);
+
+static IIO_DEV_ATTR_HYSTERESIS(S_IWUSR | S_IRUSR,
+ hid_sensor_read_hyst_raw,
+ hid_sensor_write_hyst_raw);
+
+static struct attribute *gyro_3d_attributes[] = {
+ /* common attributes */
+ &iio_dev_attr_sampling_frequency.dev_attr.attr,
+ &iio_dev_attr_hyst_raw.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group gyro_3d_attribute_group = {
+ .attrs = gyro_3d_attributes,
+};
+
+static const struct iio_info gyro_3d_info = {
+ .attrs = &gyro_3d_attribute_group,
+ .driver_module = THIS_MODULE,
+ .read_raw = &gyro_3d_read_raw,
+};
+
+/* Function to push data to buffer */
+void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len)
+{
+ struct iio_buffer *buffer = indio_dev->buffer;
+ s64 timestamp = iio_get_time_ns();
+ int datum_sz;
+
+ dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
+ if (!buffer) {
+ dev_err(&indio_dev->dev, "Buffer == NULL\n");
+ return;
+ }
+ datum_sz = buffer->access->get_bytes_per_datum(buffer);
+ if (len > datum_sz) {
+ dev_err(&indio_dev->dev, "Datum size mismatch %d:%d\n", len,
+ datum_sz);
+ return;
+ }
+ buffer->access->store_to(buffer, (u8 *)data, timestamp);
+}
+
+/* Callback handler to send event after all samples are received and captured */
+int gyro_3d_proc_event(struct hid_sensor_hub_device *hsdev, unsigned usage_id,
+ void *priv)
+{
+ struct iio_dev *indio_dev =
+ (struct iio_dev *)platform_get_drvdata(priv);
+ struct hid_sensor_attributes *st = iio_priv(indio_dev);
+ struct gyro_3d_state *gyro_state =
+ (struct gyro_3d_state *)st->private;
+
+ dev_dbg(&indio_dev->dev, "gyro_3d_proc_event [%d]\n", st->data_ready);
+ if (st->data_ready)
+ hid_sensor_push_data(indio_dev,
+ (u8 *)&gyro_state->gyro_sample_data,
+ sizeof(struct gyro_3d_sample));
+ return 0;
+}
+
+/* Capture samples in local storage */
+int gyro_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ size_t raw_len, char *raw_data,
+ void *priv)
+{
+ struct iio_dev *indio_dev =
+ (struct iio_dev *)platform_get_drvdata(priv);
+ struct hid_sensor_attributes *st = iio_priv(indio_dev);
+ struct gyro_3d_state *gyro_state =
+ (struct gyro_3d_state *)st->private;
+
+ switch (usage_id) {
+ case HID_USAGE_SENSOR_DATA_MOTION_ANGULAR_VELOCITY_X_AXIS:
+ gyro_state->gyro_sample_data.gyro_x =
+ *(u32 *)raw_data;
+ break;
+ case HID_USAGE_SENSOR_DATA_MOTION_ANGULAR_VELOCITY_Y_AXIS:
+ gyro_state->gyro_sample_data.gyro_y =
+ *(u32 *)raw_data;
+ break;
+ case HID_USAGE_SENSOR_DATA_MOTION_ANGULAR_VELOCITY_Z_AXIS:
+ gyro_state->gyro_sample_data.gyro_z =
+ *(u32 *)raw_data;
+ break;
+ default:
+ break;
+ }
+ return 0;
+}
+
+/* Parse report which is specific to an usage id*/
+static int gyro_3d_parse_report(struct platform_device *pdev,
+ struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ struct gyro_3d_state *st)
+{
+ int ret;
+
+ ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
+ usage_id,
+ HID_USAGE_SENSOR_DATA_MOTION_ANGULAR_VELOCITY_X_AXIS,
+ &st->gyro_x);
+ gyro_3d_adjust_channel_bit_mask(CHANNEL_SCAN_INDEX_X,
+ st->gyro_x.size);
+
+ ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
+ usage_id,
+ HID_USAGE_SENSOR_DATA_MOTION_ANGULAR_VELOCITY_Y_AXIS,
+ &st->gyro_y);
+ gyro_3d_adjust_channel_bit_mask(CHANNEL_SCAN_INDEX_Y,
+ st->gyro_y.size);
+
+ ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
+ usage_id,
+ HID_USAGE_SENSOR_DATA_MOTION_ANGULAR_VELOCITY_Z_AXIS,
+ &st->gyro_z);
+ gyro_3d_adjust_channel_bit_mask(CHANNEL_SCAN_INDEX_Z,
+ st->gyro_z.size);
+
+ dev_dbg(&pdev->dev, "gyro_3d %x:%x, %x:%x, %x:%x\n",
+ st->gyro_x.index,
+ st->gyro_x.report_id,
+ st->gyro_y.index, st->gyro_y.report_id,
+ st->gyro_z.index, st->gyro_z.report_id);
+
+ return 0;
+}
+
+/* Function to initialize the processing for usage id */
+static int gyro_3d_init(struct platform_device *pdev,
+ struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id)
+{
+ int ret = 0;
+ static char *name = "gyro_3d";
+ struct iio_dev *indio_dev;
+ struct gyro_3d_state *gyro_state;
+ struct hid_sensor_attributes *st;
+
+ gyro_state = kzalloc(sizeof(struct gyro_3d_state), GFP_KERNEL);
+ if (gyro_state == NULL) {
+ ret = -ENOMEM;
+ goto error_ret;
+ }
+
+ indio_dev = iio_device_alloc(sizeof(struct hid_sensor_attributes));
+ if (indio_dev == NULL) {
+ ret = -ENOMEM;
+ goto error_free_state;
+ }
+ platform_set_drvdata(pdev, indio_dev);
+ st = iio_priv(indio_dev);
+ st->hsdev = hsdev;
+ st->pdev = pdev;
+ st->private = (void *)gyro_state;
+
+ ret = hid_sensor_parse_common_attributes(hsdev, usage_id, st);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup common attributes\n");
+ goto error_free_dev;
+ }
+
+ ret = gyro_3d_parse_report(pdev, hsdev, usage_id, gyro_state);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup attributes\n");
+ goto error_free_dev;
+ }
+
+ indio_dev->channels = kmemdup(gyro_3d_channels,
+ sizeof(gyro_3d_channels),
+ GFP_KERNEL);
+ if (!indio_dev->channels) {
+ dev_err(&pdev->dev, "failed to duplicate channels\n");
+ goto error_free_dev;
+ }
+
+ indio_dev->num_channels =
+ ARRAY_SIZE(gyro_3d_channels);
+ indio_dev->dev.parent = &pdev->dev;
+ indio_dev->info = &gyro_3d_info;
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ NULL, NULL);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
+ goto error_free_dev_mem;
+ }
+ iio_scan_mask_set(indio_dev, indio_dev->buffer,
+ CHANNEL_SCAN_INDEX_X);
+ iio_scan_mask_set(indio_dev, indio_dev->buffer,
+ CHANNEL_SCAN_INDEX_Y);
+ iio_scan_mask_set(indio_dev, indio_dev->buffer,
+ CHANNEL_SCAN_INDEX_Z);
+ st->data_ready = false;
+ ret = hid_sensor_setup_trigger(indio_dev, name);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "trigger setup failed\n");
+ goto error_unreg_buffer_funcs;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "device register failed\n");
+ goto error_remove_trigger;
+ }
+ return ret;
+
+error_remove_trigger:
+ hid_sensor_remove_trigger(indio_dev);
+error_unreg_buffer_funcs:
+ iio_triggered_buffer_cleanup(indio_dev);
+error_free_dev_mem:
+ kfree(indio_dev->channels);
+error_free_dev:
+ iio_device_free(indio_dev);
+error_free_state:
+ kfree(gyro_state);
+error_ret:
+ return ret;
+}
+
+/* Function to deinitialize the processing for usage id */
+static int gyro_3d_exit(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct hid_sensor_attributes *st = iio_priv(indio_dev);
+ struct gyro_3d_state *gyro_state =
+ (struct gyro_3d_state *)st->private;
+
+ iio_device_unregister(indio_dev);
+ hid_sensor_remove_trigger(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ kfree(indio_dev->channels);
+ iio_device_free(indio_dev);
+ kfree(gyro_state);
+ return ret;
+}
+
+static struct hid_sensor_hub_callbacks gyro_3d_callbacks = {
+ .send_event = gyro_3d_proc_event,
+ .capture_sample = gyro_3d_capture_sample,
+};
+
+static int __devinit hid_gyro_3d_probe(struct platform_device *pdev)
+{
+ int ret;
+ u32 *pdata = (u32 *)pdev->dev.platform_data;
+ struct hid_sensor_hub_device *hsdev;
+
+ hsdev = (struct hid_sensor_hub_device *)*pdata;
+ ret = gyro_3d_init(pdev, hsdev, HID_USAGE_SENSOR_GYRO_3D);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "gyro_3d_init failed\n");
+ return ret;
+ }
+ gyro_3d_callbacks.pdev = pdev;
+ ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D,
+ &gyro_3d_callbacks);
+ return 0;
+}
+
+static int __devinit hid_gyro_3d_remove(struct platform_device *pdev)
+{
+ u32 *pdata = (u32 *)pdev->dev.platform_data;
+ struct hid_sensor_hub_device *hsdev;
+
+ hsdev = (struct hid_sensor_hub_device *)*pdata;
+ gyro_3d_exit(pdev);
+ return sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D);
+}
+
+static struct platform_driver hid_gyro_3d_platform_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = hid_gyro_3d_probe,
+ .remove = hid_gyro_3d_remove,
+};
+
+/*--------------------------------------------------------------------------*/
+
+static int __init hid_gyro_3d_init(void)
+{
+ return platform_driver_register(&hid_gyro_3d_platform_driver);
+}
+
+static void __exit hid_gyro_3d_exit(void)
+{
+ platform_driver_unregister(&hid_gyro_3d_platform_driver);
+}
+
+module_init(hid_gyro_3d_init);
+module_exit(hid_gyro_3d_exit);
+
+MODULE_DESCRIPTION("HID Sensor Gyro 3D");
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
+MODULE_LICENSE("GPL");