xref: /openbmc/linux/drivers/iio/accel/hid-sensor-accel-3d.c (revision 64ebe955f9447fcecf65360ec3bc332f4ec411b6)
145fe6f7dSsrinivas pandruvada /*
245fe6f7dSsrinivas pandruvada  * HID Sensors Driver
345fe6f7dSsrinivas pandruvada  * Copyright (c) 2012, Intel Corporation.
445fe6f7dSsrinivas pandruvada  *
545fe6f7dSsrinivas pandruvada  * This program is free software; you can redistribute it and/or modify it
645fe6f7dSsrinivas pandruvada  * under the terms and conditions of the GNU General Public License,
745fe6f7dSsrinivas pandruvada  * version 2, as published by the Free Software Foundation.
845fe6f7dSsrinivas pandruvada  *
945fe6f7dSsrinivas pandruvada  * This program is distributed in the hope it will be useful, but WITHOUT
1045fe6f7dSsrinivas pandruvada  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1145fe6f7dSsrinivas pandruvada  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
1245fe6f7dSsrinivas pandruvada  * more details.
1345fe6f7dSsrinivas pandruvada  *
1445fe6f7dSsrinivas pandruvada  * You should have received a copy of the GNU General Public License along with
1545fe6f7dSsrinivas pandruvada  * this program; if not, write to the Free Software Foundation, Inc.,
1645fe6f7dSsrinivas pandruvada  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
1745fe6f7dSsrinivas pandruvada  *
1845fe6f7dSsrinivas pandruvada  */
1945fe6f7dSsrinivas pandruvada #include <linux/device.h>
2045fe6f7dSsrinivas pandruvada #include <linux/platform_device.h>
2145fe6f7dSsrinivas pandruvada #include <linux/module.h>
2245fe6f7dSsrinivas pandruvada #include <linux/interrupt.h>
2345fe6f7dSsrinivas pandruvada #include <linux/irq.h>
2445fe6f7dSsrinivas pandruvada #include <linux/slab.h>
2545fe6f7dSsrinivas pandruvada #include <linux/hid-sensor-hub.h>
2645fe6f7dSsrinivas pandruvada #include <linux/iio/iio.h>
2745fe6f7dSsrinivas pandruvada #include <linux/iio/sysfs.h>
2845fe6f7dSsrinivas pandruvada #include <linux/iio/buffer.h>
2945fe6f7dSsrinivas pandruvada #include <linux/iio/trigger_consumer.h>
3045fe6f7dSsrinivas pandruvada #include <linux/iio/triggered_buffer.h>
3145fe6f7dSsrinivas pandruvada #include "../common/hid-sensors/hid-sensor-attributes.h"
3245fe6f7dSsrinivas pandruvada #include "../common/hid-sensors/hid-sensor-trigger.h"
3345fe6f7dSsrinivas pandruvada 
3445fe6f7dSsrinivas pandruvada /*Format: HID-SENSOR-usage_id_in_hex*/
3545fe6f7dSsrinivas pandruvada /*Usage ID from spec for Accelerometer-3D: 0x200073*/
3645fe6f7dSsrinivas pandruvada #define DRIVER_NAME "HID-SENSOR-200073"
3745fe6f7dSsrinivas pandruvada 
3845fe6f7dSsrinivas pandruvada enum accel_3d_channel {
3945fe6f7dSsrinivas pandruvada 	CHANNEL_SCAN_INDEX_X,
4045fe6f7dSsrinivas pandruvada 	CHANNEL_SCAN_INDEX_Y,
4145fe6f7dSsrinivas pandruvada 	CHANNEL_SCAN_INDEX_Z,
4245fe6f7dSsrinivas pandruvada 	ACCEL_3D_CHANNEL_MAX,
4345fe6f7dSsrinivas pandruvada };
4445fe6f7dSsrinivas pandruvada 
4545fe6f7dSsrinivas pandruvada struct accel_3d_state {
4645fe6f7dSsrinivas pandruvada 	struct hid_sensor_hub_callbacks callbacks;
4745fe6f7dSsrinivas pandruvada 	struct hid_sensor_iio_common common_attributes;
4845fe6f7dSsrinivas pandruvada 	struct hid_sensor_hub_attribute_info accel[ACCEL_3D_CHANNEL_MAX];
4945fe6f7dSsrinivas pandruvada 	u32 accel_val[ACCEL_3D_CHANNEL_MAX];
5045fe6f7dSsrinivas pandruvada };
5145fe6f7dSsrinivas pandruvada 
5245fe6f7dSsrinivas pandruvada static const u32 accel_3d_addresses[ACCEL_3D_CHANNEL_MAX] = {
5345fe6f7dSsrinivas pandruvada 	HID_USAGE_SENSOR_ACCEL_X_AXIS,
5445fe6f7dSsrinivas pandruvada 	HID_USAGE_SENSOR_ACCEL_Y_AXIS,
5545fe6f7dSsrinivas pandruvada 	HID_USAGE_SENSOR_ACCEL_Z_AXIS
5645fe6f7dSsrinivas pandruvada };
5745fe6f7dSsrinivas pandruvada 
5845fe6f7dSsrinivas pandruvada /* Channel definitions */
5945fe6f7dSsrinivas pandruvada static const struct iio_chan_spec accel_3d_channels[] = {
6045fe6f7dSsrinivas pandruvada 	{
6145fe6f7dSsrinivas pandruvada 		.type = IIO_ACCEL,
6245fe6f7dSsrinivas pandruvada 		.modified = 1,
6345fe6f7dSsrinivas pandruvada 		.channel2 = IIO_MOD_X,
6445fe6f7dSsrinivas pandruvada 		.info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT |
6545fe6f7dSsrinivas pandruvada 		IIO_CHAN_INFO_SCALE_SHARED_BIT |
6645fe6f7dSsrinivas pandruvada 		IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT |
6745fe6f7dSsrinivas pandruvada 		IIO_CHAN_INFO_HYSTERESIS_SHARED_BIT,
6845fe6f7dSsrinivas pandruvada 		.scan_index = CHANNEL_SCAN_INDEX_X,
6945fe6f7dSsrinivas pandruvada 	}, {
7045fe6f7dSsrinivas pandruvada 		.type = IIO_ACCEL,
7145fe6f7dSsrinivas pandruvada 		.modified = 1,
7245fe6f7dSsrinivas pandruvada 		.channel2 = IIO_MOD_Y,
7345fe6f7dSsrinivas pandruvada 		.info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT |
7445fe6f7dSsrinivas pandruvada 		IIO_CHAN_INFO_SCALE_SHARED_BIT |
7545fe6f7dSsrinivas pandruvada 		IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT |
7645fe6f7dSsrinivas pandruvada 		IIO_CHAN_INFO_HYSTERESIS_SHARED_BIT,
7745fe6f7dSsrinivas pandruvada 		.scan_index = CHANNEL_SCAN_INDEX_Y,
7845fe6f7dSsrinivas pandruvada 	}, {
7945fe6f7dSsrinivas pandruvada 		.type = IIO_ACCEL,
8045fe6f7dSsrinivas pandruvada 		.modified = 1,
8145fe6f7dSsrinivas pandruvada 		.channel2 = IIO_MOD_Z,
8245fe6f7dSsrinivas pandruvada 		.info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT |
8345fe6f7dSsrinivas pandruvada 		IIO_CHAN_INFO_SCALE_SHARED_BIT |
8445fe6f7dSsrinivas pandruvada 		IIO_CHAN_INFO_SAMP_FREQ_SHARED_BIT |
8545fe6f7dSsrinivas pandruvada 		IIO_CHAN_INFO_HYSTERESIS_SHARED_BIT,
8645fe6f7dSsrinivas pandruvada 		.scan_index = CHANNEL_SCAN_INDEX_Z,
8745fe6f7dSsrinivas pandruvada 	}
8845fe6f7dSsrinivas pandruvada };
8945fe6f7dSsrinivas pandruvada 
9045fe6f7dSsrinivas pandruvada /* Adjust channel real bits based on report descriptor */
9145fe6f7dSsrinivas pandruvada static void accel_3d_adjust_channel_bit_mask(struct iio_chan_spec *channels,
9245fe6f7dSsrinivas pandruvada 						int channel, int size)
9345fe6f7dSsrinivas pandruvada {
9445fe6f7dSsrinivas pandruvada 	channels[channel].scan_type.sign = 's';
9545fe6f7dSsrinivas pandruvada 	/* Real storage bits will change based on the report desc. */
9645fe6f7dSsrinivas pandruvada 	channels[channel].scan_type.realbits = size * 8;
9745fe6f7dSsrinivas pandruvada 	/* Maximum size of a sample to capture is u32 */
9845fe6f7dSsrinivas pandruvada 	channels[channel].scan_type.storagebits = sizeof(u32) * 8;
9945fe6f7dSsrinivas pandruvada }
10045fe6f7dSsrinivas pandruvada 
10145fe6f7dSsrinivas pandruvada /* Channel read_raw handler */
10245fe6f7dSsrinivas pandruvada static int accel_3d_read_raw(struct iio_dev *indio_dev,
10345fe6f7dSsrinivas pandruvada 			      struct iio_chan_spec const *chan,
10445fe6f7dSsrinivas pandruvada 			      int *val, int *val2,
10545fe6f7dSsrinivas pandruvada 			      long mask)
10645fe6f7dSsrinivas pandruvada {
10745fe6f7dSsrinivas pandruvada 	struct accel_3d_state *accel_state = iio_priv(indio_dev);
10845fe6f7dSsrinivas pandruvada 	int report_id = -1;
10945fe6f7dSsrinivas pandruvada 	u32 address;
11045fe6f7dSsrinivas pandruvada 	int ret;
11145fe6f7dSsrinivas pandruvada 	int ret_type;
11245fe6f7dSsrinivas pandruvada 
11345fe6f7dSsrinivas pandruvada 	*val = 0;
11445fe6f7dSsrinivas pandruvada 	*val2 = 0;
11545fe6f7dSsrinivas pandruvada 	switch (mask) {
11645fe6f7dSsrinivas pandruvada 	case 0:
11745fe6f7dSsrinivas pandruvada 		report_id = accel_state->accel[chan->scan_index].report_id;
11845fe6f7dSsrinivas pandruvada 		address = accel_3d_addresses[chan->scan_index];
11945fe6f7dSsrinivas pandruvada 		if (report_id >= 0)
12045fe6f7dSsrinivas pandruvada 			*val = sensor_hub_input_attr_get_raw_value(
12145fe6f7dSsrinivas pandruvada 				accel_state->common_attributes.hsdev,
12245fe6f7dSsrinivas pandruvada 				HID_USAGE_SENSOR_ACCEL_3D, address,
12345fe6f7dSsrinivas pandruvada 				report_id);
12445fe6f7dSsrinivas pandruvada 		else {
12545fe6f7dSsrinivas pandruvada 			*val = 0;
12645fe6f7dSsrinivas pandruvada 			return -EINVAL;
12745fe6f7dSsrinivas pandruvada 		}
12845fe6f7dSsrinivas pandruvada 		ret_type = IIO_VAL_INT;
12945fe6f7dSsrinivas pandruvada 		break;
13045fe6f7dSsrinivas pandruvada 	case IIO_CHAN_INFO_SCALE:
13145fe6f7dSsrinivas pandruvada 		*val = accel_state->accel[CHANNEL_SCAN_INDEX_X].units;
13245fe6f7dSsrinivas pandruvada 		ret_type = IIO_VAL_INT;
13345fe6f7dSsrinivas pandruvada 		break;
13445fe6f7dSsrinivas pandruvada 	case IIO_CHAN_INFO_OFFSET:
13545fe6f7dSsrinivas pandruvada 		*val = hid_sensor_convert_exponent(
13645fe6f7dSsrinivas pandruvada 			accel_state->accel[CHANNEL_SCAN_INDEX_X].unit_expo);
13745fe6f7dSsrinivas pandruvada 		ret_type = IIO_VAL_INT;
13845fe6f7dSsrinivas pandruvada 		break;
13945fe6f7dSsrinivas pandruvada 	case IIO_CHAN_INFO_SAMP_FREQ:
14045fe6f7dSsrinivas pandruvada 		ret = hid_sensor_read_samp_freq_value(
14145fe6f7dSsrinivas pandruvada 			&accel_state->common_attributes, val, val2);
14245fe6f7dSsrinivas pandruvada 		ret_type = IIO_VAL_INT_PLUS_MICRO;
14345fe6f7dSsrinivas pandruvada 		break;
14445fe6f7dSsrinivas pandruvada 	case IIO_CHAN_INFO_HYSTERESIS:
14545fe6f7dSsrinivas pandruvada 		ret = hid_sensor_read_raw_hyst_value(
14645fe6f7dSsrinivas pandruvada 			&accel_state->common_attributes, val, val2);
14745fe6f7dSsrinivas pandruvada 		ret_type = IIO_VAL_INT_PLUS_MICRO;
14845fe6f7dSsrinivas pandruvada 		break;
14945fe6f7dSsrinivas pandruvada 	default:
15045fe6f7dSsrinivas pandruvada 		ret_type = -EINVAL;
15145fe6f7dSsrinivas pandruvada 		break;
15245fe6f7dSsrinivas pandruvada 	}
15345fe6f7dSsrinivas pandruvada 
15445fe6f7dSsrinivas pandruvada 	return ret_type;
15545fe6f7dSsrinivas pandruvada }
15645fe6f7dSsrinivas pandruvada 
15745fe6f7dSsrinivas pandruvada /* Channel write_raw handler */
15845fe6f7dSsrinivas pandruvada static int accel_3d_write_raw(struct iio_dev *indio_dev,
15945fe6f7dSsrinivas pandruvada 			       struct iio_chan_spec const *chan,
16045fe6f7dSsrinivas pandruvada 			       int val,
16145fe6f7dSsrinivas pandruvada 			       int val2,
16245fe6f7dSsrinivas pandruvada 			       long mask)
16345fe6f7dSsrinivas pandruvada {
16445fe6f7dSsrinivas pandruvada 	struct accel_3d_state *accel_state = iio_priv(indio_dev);
16545fe6f7dSsrinivas pandruvada 	int ret = 0;
16645fe6f7dSsrinivas pandruvada 
16745fe6f7dSsrinivas pandruvada 	switch (mask) {
16845fe6f7dSsrinivas pandruvada 	case IIO_CHAN_INFO_SAMP_FREQ:
16945fe6f7dSsrinivas pandruvada 		ret = hid_sensor_write_samp_freq_value(
17045fe6f7dSsrinivas pandruvada 				&accel_state->common_attributes, val, val2);
17145fe6f7dSsrinivas pandruvada 		break;
17245fe6f7dSsrinivas pandruvada 	case IIO_CHAN_INFO_HYSTERESIS:
17345fe6f7dSsrinivas pandruvada 		ret = hid_sensor_write_raw_hyst_value(
17445fe6f7dSsrinivas pandruvada 				&accel_state->common_attributes, val, val2);
17545fe6f7dSsrinivas pandruvada 		break;
17645fe6f7dSsrinivas pandruvada 	default:
17745fe6f7dSsrinivas pandruvada 		ret = -EINVAL;
17845fe6f7dSsrinivas pandruvada 	}
17945fe6f7dSsrinivas pandruvada 
18045fe6f7dSsrinivas pandruvada 	return ret;
18145fe6f7dSsrinivas pandruvada }
18245fe6f7dSsrinivas pandruvada 
18345fe6f7dSsrinivas pandruvada static int accel_3d_write_raw_get_fmt(struct iio_dev *indio_dev,
18445fe6f7dSsrinivas pandruvada 			       struct iio_chan_spec const *chan,
18545fe6f7dSsrinivas pandruvada 			       long mask)
18645fe6f7dSsrinivas pandruvada {
18745fe6f7dSsrinivas pandruvada 	return IIO_VAL_INT_PLUS_MICRO;
18845fe6f7dSsrinivas pandruvada }
18945fe6f7dSsrinivas pandruvada 
19045fe6f7dSsrinivas pandruvada static const struct iio_info accel_3d_info = {
19145fe6f7dSsrinivas pandruvada 	.driver_module = THIS_MODULE,
19245fe6f7dSsrinivas pandruvada 	.read_raw = &accel_3d_read_raw,
19345fe6f7dSsrinivas pandruvada 	.write_raw = &accel_3d_write_raw,
19445fe6f7dSsrinivas pandruvada 	.write_raw_get_fmt = &accel_3d_write_raw_get_fmt,
19545fe6f7dSsrinivas pandruvada };
19645fe6f7dSsrinivas pandruvada 
19745fe6f7dSsrinivas pandruvada /* Function to push data to buffer */
19845fe6f7dSsrinivas pandruvada static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len)
19945fe6f7dSsrinivas pandruvada {
20045fe6f7dSsrinivas pandruvada 	dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
20184b36ce5SJonathan Cameron 	iio_push_to_buffers(indio_dev, (u8 *)data);
20245fe6f7dSsrinivas pandruvada }
20345fe6f7dSsrinivas pandruvada 
20445fe6f7dSsrinivas pandruvada /* Callback handler to send event after all samples are received and captured */
20545fe6f7dSsrinivas pandruvada static int accel_3d_proc_event(struct hid_sensor_hub_device *hsdev,
20645fe6f7dSsrinivas pandruvada 				unsigned usage_id,
20745fe6f7dSsrinivas pandruvada 				void *priv)
20845fe6f7dSsrinivas pandruvada {
20945fe6f7dSsrinivas pandruvada 	struct iio_dev *indio_dev = platform_get_drvdata(priv);
21045fe6f7dSsrinivas pandruvada 	struct accel_3d_state *accel_state = iio_priv(indio_dev);
21145fe6f7dSsrinivas pandruvada 
21245fe6f7dSsrinivas pandruvada 	dev_dbg(&indio_dev->dev, "accel_3d_proc_event [%d]\n",
21345fe6f7dSsrinivas pandruvada 				accel_state->common_attributes.data_ready);
21445fe6f7dSsrinivas pandruvada 	if (accel_state->common_attributes.data_ready)
21545fe6f7dSsrinivas pandruvada 		hid_sensor_push_data(indio_dev,
21645fe6f7dSsrinivas pandruvada 				(u8 *)accel_state->accel_val,
21745fe6f7dSsrinivas pandruvada 				sizeof(accel_state->accel_val));
21845fe6f7dSsrinivas pandruvada 
21945fe6f7dSsrinivas pandruvada 	return 0;
22045fe6f7dSsrinivas pandruvada }
22145fe6f7dSsrinivas pandruvada 
22245fe6f7dSsrinivas pandruvada /* Capture samples in local storage */
22345fe6f7dSsrinivas pandruvada static int accel_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
22445fe6f7dSsrinivas pandruvada 				unsigned usage_id,
22545fe6f7dSsrinivas pandruvada 				size_t raw_len, char *raw_data,
22645fe6f7dSsrinivas pandruvada 				void *priv)
22745fe6f7dSsrinivas pandruvada {
22845fe6f7dSsrinivas pandruvada 	struct iio_dev *indio_dev = platform_get_drvdata(priv);
22945fe6f7dSsrinivas pandruvada 	struct accel_3d_state *accel_state = iio_priv(indio_dev);
23045fe6f7dSsrinivas pandruvada 	int offset;
23145fe6f7dSsrinivas pandruvada 	int ret = -EINVAL;
23245fe6f7dSsrinivas pandruvada 
23345fe6f7dSsrinivas pandruvada 	switch (usage_id) {
23445fe6f7dSsrinivas pandruvada 	case HID_USAGE_SENSOR_ACCEL_X_AXIS:
23545fe6f7dSsrinivas pandruvada 	case HID_USAGE_SENSOR_ACCEL_Y_AXIS:
23645fe6f7dSsrinivas pandruvada 	case HID_USAGE_SENSOR_ACCEL_Z_AXIS:
23745fe6f7dSsrinivas pandruvada 		offset = usage_id - HID_USAGE_SENSOR_ACCEL_X_AXIS;
23845fe6f7dSsrinivas pandruvada 		accel_state->accel_val[CHANNEL_SCAN_INDEX_X + offset] =
23945fe6f7dSsrinivas pandruvada 						*(u32 *)raw_data;
24045fe6f7dSsrinivas pandruvada 		ret = 0;
24145fe6f7dSsrinivas pandruvada 	break;
24245fe6f7dSsrinivas pandruvada 	default:
24345fe6f7dSsrinivas pandruvada 		break;
24445fe6f7dSsrinivas pandruvada 	}
24545fe6f7dSsrinivas pandruvada 
24645fe6f7dSsrinivas pandruvada 	return ret;
24745fe6f7dSsrinivas pandruvada }
24845fe6f7dSsrinivas pandruvada 
24945fe6f7dSsrinivas pandruvada /* Parse report which is specific to an usage id*/
25045fe6f7dSsrinivas pandruvada static int accel_3d_parse_report(struct platform_device *pdev,
25145fe6f7dSsrinivas pandruvada 				struct hid_sensor_hub_device *hsdev,
25245fe6f7dSsrinivas pandruvada 				struct iio_chan_spec *channels,
25345fe6f7dSsrinivas pandruvada 				unsigned usage_id,
25445fe6f7dSsrinivas pandruvada 				struct accel_3d_state *st)
25545fe6f7dSsrinivas pandruvada {
25645fe6f7dSsrinivas pandruvada 	int ret;
25745fe6f7dSsrinivas pandruvada 	int i;
25845fe6f7dSsrinivas pandruvada 
25945fe6f7dSsrinivas pandruvada 	for (i = 0; i <= CHANNEL_SCAN_INDEX_Z; ++i) {
26045fe6f7dSsrinivas pandruvada 		ret = sensor_hub_input_get_attribute_info(hsdev,
26145fe6f7dSsrinivas pandruvada 				HID_INPUT_REPORT,
26245fe6f7dSsrinivas pandruvada 				usage_id,
26345fe6f7dSsrinivas pandruvada 				HID_USAGE_SENSOR_ACCEL_X_AXIS + i,
26445fe6f7dSsrinivas pandruvada 				&st->accel[CHANNEL_SCAN_INDEX_X + i]);
26545fe6f7dSsrinivas pandruvada 		if (ret < 0)
26645fe6f7dSsrinivas pandruvada 			break;
26745fe6f7dSsrinivas pandruvada 		accel_3d_adjust_channel_bit_mask(channels,
26845fe6f7dSsrinivas pandruvada 				CHANNEL_SCAN_INDEX_X + i,
26945fe6f7dSsrinivas pandruvada 				st->accel[CHANNEL_SCAN_INDEX_X + i].size);
27045fe6f7dSsrinivas pandruvada 	}
27145fe6f7dSsrinivas pandruvada 	dev_dbg(&pdev->dev, "accel_3d %x:%x, %x:%x, %x:%x\n",
27245fe6f7dSsrinivas pandruvada 			st->accel[0].index,
27345fe6f7dSsrinivas pandruvada 			st->accel[0].report_id,
27445fe6f7dSsrinivas pandruvada 			st->accel[1].index, st->accel[1].report_id,
27545fe6f7dSsrinivas pandruvada 			st->accel[2].index, st->accel[2].report_id);
27645fe6f7dSsrinivas pandruvada 
27745fe6f7dSsrinivas pandruvada 	return ret;
27845fe6f7dSsrinivas pandruvada }
27945fe6f7dSsrinivas pandruvada 
28045fe6f7dSsrinivas pandruvada /* Function to initialize the processing for usage id */
28145fe6f7dSsrinivas pandruvada static int __devinit hid_accel_3d_probe(struct platform_device *pdev)
28245fe6f7dSsrinivas pandruvada {
28345fe6f7dSsrinivas pandruvada 	int ret = 0;
28445fe6f7dSsrinivas pandruvada 	static const char *name = "accel_3d";
28545fe6f7dSsrinivas pandruvada 	struct iio_dev *indio_dev;
28645fe6f7dSsrinivas pandruvada 	struct accel_3d_state *accel_state;
28745fe6f7dSsrinivas pandruvada 	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
28845fe6f7dSsrinivas pandruvada 	struct iio_chan_spec *channels;
28945fe6f7dSsrinivas pandruvada 
29045fe6f7dSsrinivas pandruvada 	indio_dev = iio_device_alloc(sizeof(struct accel_3d_state));
29145fe6f7dSsrinivas pandruvada 	if (indio_dev == NULL) {
29245fe6f7dSsrinivas pandruvada 		ret = -ENOMEM;
29345fe6f7dSsrinivas pandruvada 		goto error_ret;
29445fe6f7dSsrinivas pandruvada 	}
29545fe6f7dSsrinivas pandruvada 	platform_set_drvdata(pdev, indio_dev);
29645fe6f7dSsrinivas pandruvada 
29745fe6f7dSsrinivas pandruvada 	accel_state = iio_priv(indio_dev);
29845fe6f7dSsrinivas pandruvada 	accel_state->common_attributes.hsdev = hsdev;
29945fe6f7dSsrinivas pandruvada 	accel_state->common_attributes.pdev = pdev;
30045fe6f7dSsrinivas pandruvada 
30145fe6f7dSsrinivas pandruvada 	ret = hid_sensor_parse_common_attributes(hsdev,
30245fe6f7dSsrinivas pandruvada 					HID_USAGE_SENSOR_ACCEL_3D,
30345fe6f7dSsrinivas pandruvada 					&accel_state->common_attributes);
30445fe6f7dSsrinivas pandruvada 	if (ret) {
30545fe6f7dSsrinivas pandruvada 		dev_err(&pdev->dev, "failed to setup common attributes\n");
30645fe6f7dSsrinivas pandruvada 		goto error_free_dev;
30745fe6f7dSsrinivas pandruvada 	}
30845fe6f7dSsrinivas pandruvada 
309*64ebe955SAxel Lin 	channels = kmemdup(accel_3d_channels, sizeof(accel_3d_channels),
31045fe6f7dSsrinivas pandruvada 			   GFP_KERNEL);
31145fe6f7dSsrinivas pandruvada 	if (!channels) {
312*64ebe955SAxel Lin 		ret = -ENOMEM;
31345fe6f7dSsrinivas pandruvada 		dev_err(&pdev->dev, "failed to duplicate channels\n");
31445fe6f7dSsrinivas pandruvada 		goto error_free_dev;
31545fe6f7dSsrinivas pandruvada 	}
31645fe6f7dSsrinivas pandruvada 
31745fe6f7dSsrinivas pandruvada 	ret = accel_3d_parse_report(pdev, hsdev, channels,
31845fe6f7dSsrinivas pandruvada 					HID_USAGE_SENSOR_ACCEL_3D, accel_state);
31945fe6f7dSsrinivas pandruvada 	if (ret) {
32045fe6f7dSsrinivas pandruvada 		dev_err(&pdev->dev, "failed to setup attributes\n");
32145fe6f7dSsrinivas pandruvada 		goto error_free_dev_mem;
32245fe6f7dSsrinivas pandruvada 	}
32345fe6f7dSsrinivas pandruvada 
32445fe6f7dSsrinivas pandruvada 	indio_dev->channels = channels;
32545fe6f7dSsrinivas pandruvada 	indio_dev->num_channels = ARRAY_SIZE(accel_3d_channels);
32645fe6f7dSsrinivas pandruvada 	indio_dev->dev.parent = &pdev->dev;
32745fe6f7dSsrinivas pandruvada 	indio_dev->info = &accel_3d_info;
32845fe6f7dSsrinivas pandruvada 	indio_dev->name = name;
32945fe6f7dSsrinivas pandruvada 	indio_dev->modes = INDIO_DIRECT_MODE;
33045fe6f7dSsrinivas pandruvada 
33145fe6f7dSsrinivas pandruvada 	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
33245fe6f7dSsrinivas pandruvada 		NULL, NULL);
33345fe6f7dSsrinivas pandruvada 	if (ret) {
33445fe6f7dSsrinivas pandruvada 		dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
33545fe6f7dSsrinivas pandruvada 		goto error_free_dev_mem;
33645fe6f7dSsrinivas pandruvada 	}
33745fe6f7dSsrinivas pandruvada 	accel_state->common_attributes.data_ready = false;
33845fe6f7dSsrinivas pandruvada 	ret = hid_sensor_setup_trigger(indio_dev, name,
33945fe6f7dSsrinivas pandruvada 					&accel_state->common_attributes);
34045fe6f7dSsrinivas pandruvada 	if (ret < 0) {
34145fe6f7dSsrinivas pandruvada 		dev_err(&pdev->dev, "trigger setup failed\n");
34245fe6f7dSsrinivas pandruvada 		goto error_unreg_buffer_funcs;
34345fe6f7dSsrinivas pandruvada 	}
34445fe6f7dSsrinivas pandruvada 
34545fe6f7dSsrinivas pandruvada 	ret = iio_device_register(indio_dev);
34645fe6f7dSsrinivas pandruvada 	if (ret) {
34745fe6f7dSsrinivas pandruvada 		dev_err(&pdev->dev, "device register failed\n");
34845fe6f7dSsrinivas pandruvada 		goto error_remove_trigger;
34945fe6f7dSsrinivas pandruvada 	}
35045fe6f7dSsrinivas pandruvada 
35145fe6f7dSsrinivas pandruvada 	accel_state->callbacks.send_event = accel_3d_proc_event;
35245fe6f7dSsrinivas pandruvada 	accel_state->callbacks.capture_sample = accel_3d_capture_sample;
35345fe6f7dSsrinivas pandruvada 	accel_state->callbacks.pdev = pdev;
35445fe6f7dSsrinivas pandruvada 	ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D,
35545fe6f7dSsrinivas pandruvada 					&accel_state->callbacks);
35645fe6f7dSsrinivas pandruvada 	if (ret < 0) {
35745fe6f7dSsrinivas pandruvada 		dev_err(&pdev->dev, "callback reg failed\n");
35845fe6f7dSsrinivas pandruvada 		goto error_iio_unreg;
35945fe6f7dSsrinivas pandruvada 	}
36045fe6f7dSsrinivas pandruvada 
36145fe6f7dSsrinivas pandruvada 	return ret;
36245fe6f7dSsrinivas pandruvada 
36345fe6f7dSsrinivas pandruvada error_iio_unreg:
36445fe6f7dSsrinivas pandruvada 	iio_device_unregister(indio_dev);
36545fe6f7dSsrinivas pandruvada error_remove_trigger:
36645fe6f7dSsrinivas pandruvada 	hid_sensor_remove_trigger(indio_dev);
36745fe6f7dSsrinivas pandruvada error_unreg_buffer_funcs:
36845fe6f7dSsrinivas pandruvada 	iio_triggered_buffer_cleanup(indio_dev);
36945fe6f7dSsrinivas pandruvada error_free_dev_mem:
37045fe6f7dSsrinivas pandruvada 	kfree(indio_dev->channels);
37145fe6f7dSsrinivas pandruvada error_free_dev:
37245fe6f7dSsrinivas pandruvada 	iio_device_free(indio_dev);
37345fe6f7dSsrinivas pandruvada error_ret:
37445fe6f7dSsrinivas pandruvada 	return ret;
37545fe6f7dSsrinivas pandruvada }
37645fe6f7dSsrinivas pandruvada 
37745fe6f7dSsrinivas pandruvada /* Function to deinitialize the processing for usage id */
37845fe6f7dSsrinivas pandruvada static int __devinit hid_accel_3d_remove(struct platform_device *pdev)
37945fe6f7dSsrinivas pandruvada {
38045fe6f7dSsrinivas pandruvada 	struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
38145fe6f7dSsrinivas pandruvada 	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
38245fe6f7dSsrinivas pandruvada 
38345fe6f7dSsrinivas pandruvada 	sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D);
38445fe6f7dSsrinivas pandruvada 	iio_device_unregister(indio_dev);
38545fe6f7dSsrinivas pandruvada 	hid_sensor_remove_trigger(indio_dev);
38645fe6f7dSsrinivas pandruvada 	iio_triggered_buffer_cleanup(indio_dev);
38745fe6f7dSsrinivas pandruvada 	kfree(indio_dev->channels);
38845fe6f7dSsrinivas pandruvada 	iio_device_free(indio_dev);
38945fe6f7dSsrinivas pandruvada 
39045fe6f7dSsrinivas pandruvada 	return 0;
39145fe6f7dSsrinivas pandruvada }
39245fe6f7dSsrinivas pandruvada 
39345fe6f7dSsrinivas pandruvada static struct platform_driver hid_accel_3d_platform_driver = {
39445fe6f7dSsrinivas pandruvada 	.driver = {
39545fe6f7dSsrinivas pandruvada 		.name	= DRIVER_NAME,
39645fe6f7dSsrinivas pandruvada 		.owner	= THIS_MODULE,
39745fe6f7dSsrinivas pandruvada 	},
39845fe6f7dSsrinivas pandruvada 	.probe		= hid_accel_3d_probe,
39945fe6f7dSsrinivas pandruvada 	.remove		= hid_accel_3d_remove,
40045fe6f7dSsrinivas pandruvada };
40145fe6f7dSsrinivas pandruvada module_platform_driver(hid_accel_3d_platform_driver);
40245fe6f7dSsrinivas pandruvada 
40345fe6f7dSsrinivas pandruvada MODULE_DESCRIPTION("HID Sensor Accel 3D");
40445fe6f7dSsrinivas pandruvada MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
40545fe6f7dSsrinivas pandruvada MODULE_LICENSE("GPL");
406