![Greg Kroah-Hartman](/assets/img/avatar_default.png)
New functionality * A new modifier to indicate that a rotation is relative to either true or magnetic north. This is to be used by some magnetometers that provide data in this way. * hid magnetometer now supports output rotations from various variants on North * HMC5843 driver converted to regmap and reworked to allow easy support of other similar devices. Support for HMC5983 added via both i2c and SPI. * Rework of Exynos driver to simplify extension to support more devices. * Addition of support for the Exynos3250 ADC (which requires an additional clock) Support for quite a few more devices on its way. Cleanups * ad7997 - a number of cleanups and tweaks to how the events are controlled to make it more intuitive. * kxcjk - cleanups and minor fixes for this new driver. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABAgAGBQJT0VkRAAoJEFSFNJnE9BaIVmwP/i9/kzwHaXr09GbOMoUNlnuP 4wU+qJTucPOlj0rNvE6VewOshkF5G1soMAc97MAlEL12mU0qXt+q9m9xu7aVnQwF FU87BECdmbWVSIfGnCwkm2PzN+zLmGKr/TTPdCa+kuX1WIq7tUfVwYJVqU7vxDde n1G5Rx3sbujwAd/kP5X0Bk35X2Wng4Af0f3tkuoRC8nFWCxXN1qW9VZHlJCp5UIh c4J1COUeANf26CnMbgz3qqumGtYX1gbGHi3zzD4vYxD+inqKtvg/pqTqge3J7E9D HBhyNn0Rd3m2DDoz/5fRQ5z/5CAKLkpsqJa9ZsYLzzmo3AHUDYoVA6tGIoExhW9q 7P8FJgJx0Gc58V/A0Y48vcHAcqinoL+2vphc5BHZXA2wdeVHZxWO3e7HX7KUmr55 AXlHowFf0VKoJjJtcfFkFjalF5flIfyA7Kiu+10kptj8wsoX+AjUHXPYDfeRxw+S 7nkr/7janHvsBhoP83PqPdRSrlnNPiLJSl8ZIgegVpKOBtsRKJLGW4zlwTp1lchr M1ydD9eh3uUT3luKRCJzoXo60Ia15x3KBrZxIkQiORIW2otlfUm7dduICc4p9Ij7 RjU8S1NbOVZiD8fNcbmnFp0Xj3cGf4K/Jf1Jvs/QrGB2GAuYoF48BIyeaHj0tCr8 n4wJtDu+aly6vzM7Kf8d =iOto -----END PGP SIGNATURE----- Merge tag 'iio-for-3.17d' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next Jonathan writes: Fourth round of IIO new drivers, functionality and cleanups for the 3.17 cycle New functionality * A new modifier to indicate that a rotation is relative to either true or magnetic north. This is to be used by some magnetometers that provide data in this way. * hid magnetometer now supports output rotations from various variants on North * HMC5843 driver converted to regmap and reworked to allow easy support of other similar devices. Support for HMC5983 added via both i2c and SPI. * Rework of Exynos driver to simplify extension to support more devices. * Addition of support for the Exynos3250 ADC (which requires an additional clock) Support for quite a few more devices on its way. Cleanups * ad7997 - a number of cleanups and tweaks to how the events are controlled to make it more intuitive. * kxcjk - cleanups and minor fixes for this new driver.
546 lines
15 KiB
C
546 lines
15 KiB
C
/*
|
|
* 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/delay.h>
|
|
#include <linux/hid-sensor-hub.h>
|
|
#include <linux/iio/iio.h>
|
|
#include <linux/iio/sysfs.h>
|
|
#include <linux/iio/buffer.h>
|
|
#include <linux/iio/trigger_consumer.h>
|
|
#include <linux/iio/triggered_buffer.h>
|
|
#include "../common/hid-sensors/hid-sensor-trigger.h"
|
|
|
|
enum magn_3d_channel {
|
|
CHANNEL_SCAN_INDEX_X,
|
|
CHANNEL_SCAN_INDEX_Y,
|
|
CHANNEL_SCAN_INDEX_Z,
|
|
CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP,
|
|
CHANNEL_SCAN_INDEX_NORTH_TRUE_TILT_COMP,
|
|
CHANNEL_SCAN_INDEX_NORTH_MAGN,
|
|
CHANNEL_SCAN_INDEX_NORTH_TRUE,
|
|
MAGN_3D_CHANNEL_MAX,
|
|
};
|
|
|
|
struct magn_3d_state {
|
|
struct hid_sensor_hub_callbacks callbacks;
|
|
struct hid_sensor_common common_attributes;
|
|
struct hid_sensor_hub_attribute_info magn[MAGN_3D_CHANNEL_MAX];
|
|
|
|
/* dynamically sized array to hold sensor values */
|
|
u32 *iio_vals;
|
|
/* array of pointers to sensor value */
|
|
u32 *magn_val_addr[MAGN_3D_CHANNEL_MAX];
|
|
|
|
int scale_pre_decml;
|
|
int scale_post_decml;
|
|
int scale_precision;
|
|
int value_offset;
|
|
};
|
|
|
|
static const u32 magn_3d_addresses[MAGN_3D_CHANNEL_MAX] = {
|
|
HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS,
|
|
HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS,
|
|
HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS,
|
|
HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH,
|
|
HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH,
|
|
HID_USAGE_SENSOR_ORIENT_MAGN_NORTH,
|
|
HID_USAGE_SENSOR_ORIENT_TRUE_NORTH,
|
|
};
|
|
|
|
/* Channel definitions */
|
|
static const struct iio_chan_spec magn_3d_channels[] = {
|
|
{
|
|
.type = IIO_MAGN,
|
|
.modified = 1,
|
|
.channel2 = IIO_MOD_X,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
|
|
BIT(IIO_CHAN_INFO_SCALE) |
|
|
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
|
|
BIT(IIO_CHAN_INFO_HYSTERESIS),
|
|
}, {
|
|
.type = IIO_MAGN,
|
|
.modified = 1,
|
|
.channel2 = IIO_MOD_Y,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
|
|
BIT(IIO_CHAN_INFO_SCALE) |
|
|
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
|
|
BIT(IIO_CHAN_INFO_HYSTERESIS),
|
|
}, {
|
|
.type = IIO_MAGN,
|
|
.modified = 1,
|
|
.channel2 = IIO_MOD_Z,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
|
|
BIT(IIO_CHAN_INFO_SCALE) |
|
|
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
|
|
BIT(IIO_CHAN_INFO_HYSTERESIS),
|
|
}, {
|
|
.type = IIO_ROT,
|
|
.modified = 1,
|
|
.channel2 = IIO_MOD_NORTH_MAGN_TILT_COMP,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
|
|
BIT(IIO_CHAN_INFO_SCALE) |
|
|
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
|
|
BIT(IIO_CHAN_INFO_HYSTERESIS),
|
|
}, {
|
|
.type = IIO_ROT,
|
|
.modified = 1,
|
|
.channel2 = IIO_MOD_NORTH_TRUE_TILT_COMP,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
|
|
BIT(IIO_CHAN_INFO_SCALE) |
|
|
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
|
|
BIT(IIO_CHAN_INFO_HYSTERESIS),
|
|
}, {
|
|
.type = IIO_ROT,
|
|
.modified = 1,
|
|
.channel2 = IIO_MOD_NORTH_MAGN,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
|
|
BIT(IIO_CHAN_INFO_SCALE) |
|
|
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
|
|
BIT(IIO_CHAN_INFO_HYSTERESIS),
|
|
}, {
|
|
.type = IIO_ROT,
|
|
.modified = 1,
|
|
.channel2 = IIO_MOD_NORTH_TRUE,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
|
|
BIT(IIO_CHAN_INFO_SCALE) |
|
|
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
|
|
BIT(IIO_CHAN_INFO_HYSTERESIS),
|
|
}
|
|
};
|
|
|
|
/* Adjust channel real bits based on report descriptor */
|
|
static void magn_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
|
|
int channel, int size)
|
|
{
|
|
channels[channel].scan_type.sign = 's';
|
|
/* Real storage bits will change based on the report desc. */
|
|
channels[channel].scan_type.realbits = size * 8;
|
|
/* Maximum size of a sample to capture is u32 */
|
|
channels[channel].scan_type.storagebits = sizeof(u32) * 8;
|
|
}
|
|
|
|
/* Channel read_raw handler */
|
|
static int magn_3d_read_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int *val, int *val2,
|
|
long mask)
|
|
{
|
|
struct magn_3d_state *magn_state = iio_priv(indio_dev);
|
|
int report_id = -1;
|
|
u32 address;
|
|
int ret_type;
|
|
s32 poll_value;
|
|
|
|
*val = 0;
|
|
*val2 = 0;
|
|
switch (mask) {
|
|
case 0:
|
|
poll_value = hid_sensor_read_poll_value(
|
|
&magn_state->common_attributes);
|
|
if (poll_value < 0)
|
|
return -EINVAL;
|
|
|
|
hid_sensor_power_state(&magn_state->common_attributes, true);
|
|
msleep_interruptible(poll_value * 2);
|
|
|
|
report_id =
|
|
magn_state->magn[chan->address].report_id;
|
|
address = magn_3d_addresses[chan->address];
|
|
if (report_id >= 0)
|
|
*val = sensor_hub_input_attr_get_raw_value(
|
|
magn_state->common_attributes.hsdev,
|
|
HID_USAGE_SENSOR_COMPASS_3D, address,
|
|
report_id);
|
|
else {
|
|
*val = 0;
|
|
hid_sensor_power_state(&magn_state->common_attributes,
|
|
false);
|
|
return -EINVAL;
|
|
}
|
|
hid_sensor_power_state(&magn_state->common_attributes, false);
|
|
ret_type = IIO_VAL_INT;
|
|
break;
|
|
case IIO_CHAN_INFO_SCALE:
|
|
*val = magn_state->scale_pre_decml;
|
|
*val2 = magn_state->scale_post_decml;
|
|
ret_type = magn_state->scale_precision;
|
|
break;
|
|
case IIO_CHAN_INFO_OFFSET:
|
|
*val = magn_state->value_offset;
|
|
ret_type = IIO_VAL_INT;
|
|
break;
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
ret_type = hid_sensor_read_samp_freq_value(
|
|
&magn_state->common_attributes, val, val2);
|
|
break;
|
|
case IIO_CHAN_INFO_HYSTERESIS:
|
|
ret_type = hid_sensor_read_raw_hyst_value(
|
|
&magn_state->common_attributes, val, val2);
|
|
break;
|
|
default:
|
|
ret_type = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return ret_type;
|
|
}
|
|
|
|
/* Channel write_raw handler */
|
|
static int magn_3d_write_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int val,
|
|
int val2,
|
|
long mask)
|
|
{
|
|
struct magn_3d_state *magn_state = iio_priv(indio_dev);
|
|
int ret = 0;
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
ret = hid_sensor_write_samp_freq_value(
|
|
&magn_state->common_attributes, val, val2);
|
|
break;
|
|
case IIO_CHAN_INFO_HYSTERESIS:
|
|
ret = hid_sensor_write_raw_hyst_value(
|
|
&magn_state->common_attributes, val, val2);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct iio_info magn_3d_info = {
|
|
.driver_module = THIS_MODULE,
|
|
.read_raw = &magn_3d_read_raw,
|
|
.write_raw = &magn_3d_write_raw,
|
|
};
|
|
|
|
/* Function to push data to buffer */
|
|
static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
|
|
int len)
|
|
{
|
|
dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
|
|
iio_push_to_buffers(indio_dev, data);
|
|
}
|
|
|
|
/* Callback handler to send event after all samples are received and captured */
|
|
static int magn_3d_proc_event(struct hid_sensor_hub_device *hsdev,
|
|
unsigned usage_id,
|
|
void *priv)
|
|
{
|
|
struct iio_dev *indio_dev = platform_get_drvdata(priv);
|
|
struct magn_3d_state *magn_state = iio_priv(indio_dev);
|
|
|
|
dev_dbg(&indio_dev->dev, "magn_3d_proc_event\n");
|
|
if (atomic_read(&magn_state->common_attributes.data_ready))
|
|
hid_sensor_push_data(indio_dev,
|
|
magn_state->iio_vals,
|
|
sizeof(magn_state->iio_vals));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Capture samples in local storage */
|
|
static int magn_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 = platform_get_drvdata(priv);
|
|
struct magn_3d_state *magn_state = iio_priv(indio_dev);
|
|
int offset;
|
|
int ret = 0;
|
|
u32 *iio_val = NULL;
|
|
|
|
switch (usage_id) {
|
|
case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS:
|
|
case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS:
|
|
case HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS:
|
|
offset = (usage_id - HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS)
|
|
+ CHANNEL_SCAN_INDEX_X;
|
|
break;
|
|
case HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH:
|
|
case HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH:
|
|
case HID_USAGE_SENSOR_ORIENT_MAGN_NORTH:
|
|
case HID_USAGE_SENSOR_ORIENT_TRUE_NORTH:
|
|
offset = (usage_id - HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH)
|
|
+ CHANNEL_SCAN_INDEX_NORTH_MAGN_TILT_COMP;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
iio_val = magn_state->magn_val_addr[offset];
|
|
|
|
if (iio_val != NULL)
|
|
*iio_val = *((u32 *)raw_data);
|
|
else
|
|
ret = -EINVAL;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Parse report which is specific to an usage id*/
|
|
static int magn_3d_parse_report(struct platform_device *pdev,
|
|
struct hid_sensor_hub_device *hsdev,
|
|
struct iio_chan_spec **channels,
|
|
int *chan_count,
|
|
unsigned usage_id,
|
|
struct magn_3d_state *st)
|
|
{
|
|
int i;
|
|
int attr_count = 0;
|
|
struct iio_chan_spec *_channels;
|
|
|
|
/* Scan for each usage attribute supported */
|
|
for (i = 0; i < MAGN_3D_CHANNEL_MAX; i++) {
|
|
int status;
|
|
u32 address = magn_3d_addresses[i];
|
|
|
|
/* Check if usage attribute exists in the sensor hub device */
|
|
status = sensor_hub_input_get_attribute_info(hsdev,
|
|
HID_INPUT_REPORT,
|
|
usage_id,
|
|
address,
|
|
&(st->magn[i]));
|
|
if (!status)
|
|
attr_count++;
|
|
}
|
|
|
|
if (attr_count <= 0) {
|
|
dev_err(&pdev->dev,
|
|
"failed to find any supported usage attributes in report\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev_dbg(&pdev->dev, "magn_3d Found %d usage attributes\n",
|
|
attr_count);
|
|
dev_dbg(&pdev->dev, "magn_3d X: %x:%x Y: %x:%x Z: %x:%x\n",
|
|
st->magn[0].index,
|
|
st->magn[0].report_id,
|
|
st->magn[1].index, st->magn[1].report_id,
|
|
st->magn[2].index, st->magn[2].report_id);
|
|
|
|
/* Setup IIO channel array */
|
|
_channels = devm_kcalloc(&pdev->dev, attr_count,
|
|
sizeof(struct iio_chan_spec),
|
|
GFP_KERNEL);
|
|
if (!_channels) {
|
|
dev_err(&pdev->dev,
|
|
"failed to allocate space for iio channels\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
st->iio_vals = devm_kcalloc(&pdev->dev, attr_count,
|
|
sizeof(u32),
|
|
GFP_KERNEL);
|
|
if (!st->iio_vals) {
|
|
dev_err(&pdev->dev,
|
|
"failed to allocate space for iio values array\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
for (i = 0, *chan_count = 0;
|
|
i < MAGN_3D_CHANNEL_MAX && *chan_count < attr_count;
|
|
i++){
|
|
if (st->magn[i].index >= 0) {
|
|
/* Setup IIO channel struct */
|
|
(_channels[*chan_count]) = magn_3d_channels[i];
|
|
(_channels[*chan_count]).scan_index = *chan_count;
|
|
(_channels[*chan_count]).address = i;
|
|
|
|
/* Set magn_val_addr to iio value address */
|
|
st->magn_val_addr[i] = &(st->iio_vals[*chan_count]);
|
|
magn_3d_adjust_channel_bit_mask(_channels,
|
|
*chan_count,
|
|
st->magn[i].size);
|
|
(*chan_count)++;
|
|
}
|
|
}
|
|
|
|
if (*chan_count <= 0) {
|
|
dev_err(&pdev->dev,
|
|
"failed to find any magnetic channels setup\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
*channels = _channels;
|
|
|
|
dev_dbg(&pdev->dev, "magn_3d Setup %d IIO channels\n",
|
|
*chan_count);
|
|
|
|
st->scale_precision = hid_sensor_format_scale(
|
|
HID_USAGE_SENSOR_COMPASS_3D,
|
|
&st->magn[CHANNEL_SCAN_INDEX_X],
|
|
&st->scale_pre_decml, &st->scale_post_decml);
|
|
|
|
/* Set Sensitivity field ids, when there is no individual modifier */
|
|
if (st->common_attributes.sensitivity.index < 0) {
|
|
sensor_hub_input_get_attribute_info(hsdev,
|
|
HID_FEATURE_REPORT, usage_id,
|
|
HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
|
|
HID_USAGE_SENSOR_DATA_ORIENTATION,
|
|
&st->common_attributes.sensitivity);
|
|
dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
|
|
st->common_attributes.sensitivity.index,
|
|
st->common_attributes.sensitivity.report_id);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Function to initialize the processing for usage id */
|
|
static int hid_magn_3d_probe(struct platform_device *pdev)
|
|
{
|
|
int ret = 0;
|
|
static char *name = "magn_3d";
|
|
struct iio_dev *indio_dev;
|
|
struct magn_3d_state *magn_state;
|
|
struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
|
|
struct iio_chan_spec *channels;
|
|
int chan_count = 0;
|
|
|
|
indio_dev = devm_iio_device_alloc(&pdev->dev,
|
|
sizeof(struct magn_3d_state));
|
|
if (indio_dev == NULL)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, indio_dev);
|
|
|
|
magn_state = iio_priv(indio_dev);
|
|
magn_state->common_attributes.hsdev = hsdev;
|
|
magn_state->common_attributes.pdev = pdev;
|
|
|
|
ret = hid_sensor_parse_common_attributes(hsdev,
|
|
HID_USAGE_SENSOR_COMPASS_3D,
|
|
&magn_state->common_attributes);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to setup common attributes\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = magn_3d_parse_report(pdev, hsdev,
|
|
&channels, &chan_count,
|
|
HID_USAGE_SENSOR_COMPASS_3D, magn_state);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to parse report\n");
|
|
return ret;
|
|
}
|
|
|
|
indio_dev->channels = channels;
|
|
indio_dev->num_channels = chan_count;
|
|
indio_dev->dev.parent = &pdev->dev;
|
|
indio_dev->info = &magn_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");
|
|
return ret;
|
|
}
|
|
atomic_set(&magn_state->common_attributes.data_ready, 0);
|
|
ret = hid_sensor_setup_trigger(indio_dev, name,
|
|
&magn_state->common_attributes);
|
|
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;
|
|
}
|
|
|
|
magn_state->callbacks.send_event = magn_3d_proc_event;
|
|
magn_state->callbacks.capture_sample = magn_3d_capture_sample;
|
|
magn_state->callbacks.pdev = pdev;
|
|
ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D,
|
|
&magn_state->callbacks);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "callback reg failed\n");
|
|
goto error_iio_unreg;
|
|
}
|
|
|
|
return ret;
|
|
|
|
error_iio_unreg:
|
|
iio_device_unregister(indio_dev);
|
|
error_remove_trigger:
|
|
hid_sensor_remove_trigger(&magn_state->common_attributes);
|
|
error_unreg_buffer_funcs:
|
|
iio_triggered_buffer_cleanup(indio_dev);
|
|
return ret;
|
|
}
|
|
|
|
/* Function to deinitialize the processing for usage id */
|
|
static int hid_magn_3d_remove(struct platform_device *pdev)
|
|
{
|
|
struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
|
|
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
|
|
struct magn_3d_state *magn_state = iio_priv(indio_dev);
|
|
|
|
sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D);
|
|
iio_device_unregister(indio_dev);
|
|
hid_sensor_remove_trigger(&magn_state->common_attributes);
|
|
iio_triggered_buffer_cleanup(indio_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_device_id hid_magn_3d_ids[] = {
|
|
{
|
|
/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
|
|
.name = "HID-SENSOR-200083",
|
|
},
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, hid_magn_3d_ids);
|
|
|
|
static struct platform_driver hid_magn_3d_platform_driver = {
|
|
.id_table = hid_magn_3d_ids,
|
|
.driver = {
|
|
.name = KBUILD_MODNAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = hid_magn_3d_probe,
|
|
.remove = hid_magn_3d_remove,
|
|
};
|
|
module_platform_driver(hid_magn_3d_platform_driver);
|
|
|
|
MODULE_DESCRIPTION("HID Sensor Magnetometer 3D");
|
|
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
|
|
MODULE_LICENSE("GPL");
|