3 * Copyright (c) 2013, Intel Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.
19 #include <linux/device.h>
20 #include <linux/platform_device.h>
21 #include <linux/module.h>
22 #include <linux/interrupt.h>
23 #include <linux/irq.h>
24 #include <linux/slab.h>
25 #include <linux/delay.h>
26 #include <linux/hid-sensor-hub.h>
27 #include <linux/iio/iio.h>
28 #include <linux/iio/sysfs.h>
29 #include <linux/iio/buffer.h>
30 #include <linux/iio/trigger_consumer.h>
31 #include <linux/iio/triggered_buffer.h>
32 #include "../common/hid-sensors/hid-sensor-trigger.h"
34 enum incl_3d_channel {
41 struct incl_3d_state {
42 struct hid_sensor_hub_callbacks callbacks;
43 struct hid_sensor_common common_attributes;
44 struct hid_sensor_hub_attribute_info incl[INCLI_3D_CHANNEL_MAX];
45 u32 incl_val[INCLI_3D_CHANNEL_MAX];
52 static const u32 incl_3d_addresses[INCLI_3D_CHANNEL_MAX] = {
53 HID_USAGE_SENSOR_ORIENT_TILT_X,
54 HID_USAGE_SENSOR_ORIENT_TILT_Y,
55 HID_USAGE_SENSOR_ORIENT_TILT_Z
58 /* Channel definitions */
59 static const struct iio_chan_spec incl_3d_channels[] = {
63 .channel2 = IIO_MOD_X,
64 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
65 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
66 BIT(IIO_CHAN_INFO_SCALE) |
67 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
68 BIT(IIO_CHAN_INFO_HYSTERESIS),
69 .scan_index = CHANNEL_SCAN_INDEX_X,
73 .channel2 = IIO_MOD_Y,
74 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
75 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
76 BIT(IIO_CHAN_INFO_SCALE) |
77 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
78 BIT(IIO_CHAN_INFO_HYSTERESIS),
79 .scan_index = CHANNEL_SCAN_INDEX_Y,
83 .channel2 = IIO_MOD_Z,
84 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
85 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
86 BIT(IIO_CHAN_INFO_SCALE) |
87 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
88 BIT(IIO_CHAN_INFO_HYSTERESIS),
89 .scan_index = CHANNEL_SCAN_INDEX_Z,
93 /* Adjust channel real bits based on report descriptor */
94 static void incl_3d_adjust_channel_bit_mask(struct iio_chan_spec *chan,
97 chan->scan_type.sign = 's';
98 /* Real storage bits will change based on the report desc. */
99 chan->scan_type.realbits = size * 8;
100 /* Maximum size of a sample to capture is u32 */
101 chan->scan_type.storagebits = sizeof(u32) * 8;
104 /* Channel read_raw handler */
105 static int incl_3d_read_raw(struct iio_dev *indio_dev,
106 struct iio_chan_spec const *chan,
110 struct incl_3d_state *incl_state = iio_priv(indio_dev);
119 case IIO_CHAN_INFO_RAW:
120 poll_value = hid_sensor_read_poll_value(
121 &incl_state->common_attributes);
125 hid_sensor_power_state(&incl_state->common_attributes, true);
126 msleep_interruptible(poll_value * 2);
129 incl_state->incl[chan->scan_index].report_id;
130 address = incl_3d_addresses[chan->scan_index];
132 *val = sensor_hub_input_attr_get_raw_value(
133 incl_state->common_attributes.hsdev,
134 HID_USAGE_SENSOR_INCLINOMETER_3D, address,
138 hid_sensor_power_state(&incl_state->common_attributes,
142 hid_sensor_power_state(&incl_state->common_attributes, false);
143 ret_type = IIO_VAL_INT;
145 case IIO_CHAN_INFO_SCALE:
146 *val = incl_state->scale_pre_decml;
147 *val2 = incl_state->scale_post_decml;
148 ret_type = incl_state->scale_precision;
150 case IIO_CHAN_INFO_OFFSET:
151 *val = incl_state->value_offset;
152 ret_type = IIO_VAL_INT;
154 case IIO_CHAN_INFO_SAMP_FREQ:
155 ret_type = hid_sensor_read_samp_freq_value(
156 &incl_state->common_attributes, val, val2);
158 case IIO_CHAN_INFO_HYSTERESIS:
159 ret_type = hid_sensor_read_raw_hyst_value(
160 &incl_state->common_attributes, val, val2);
170 /* Channel write_raw handler */
171 static int incl_3d_write_raw(struct iio_dev *indio_dev,
172 struct iio_chan_spec const *chan,
177 struct incl_3d_state *incl_state = iio_priv(indio_dev);
181 case IIO_CHAN_INFO_SAMP_FREQ:
182 ret = hid_sensor_write_samp_freq_value(
183 &incl_state->common_attributes, val, val2);
185 case IIO_CHAN_INFO_HYSTERESIS:
186 ret = hid_sensor_write_raw_hyst_value(
187 &incl_state->common_attributes, val, val2);
196 static const struct iio_info incl_3d_info = {
197 .driver_module = THIS_MODULE,
198 .read_raw = &incl_3d_read_raw,
199 .write_raw = &incl_3d_write_raw,
202 /* Function to push data to buffer */
203 static void hid_sensor_push_data(struct iio_dev *indio_dev, u8 *data, int len)
205 dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
206 iio_push_to_buffers(indio_dev, (u8 *)data);
209 /* Callback handler to send event after all samples are received and captured */
210 static int incl_3d_proc_event(struct hid_sensor_hub_device *hsdev,
214 struct iio_dev *indio_dev = platform_get_drvdata(priv);
215 struct incl_3d_state *incl_state = iio_priv(indio_dev);
217 dev_dbg(&indio_dev->dev, "incl_3d_proc_event\n");
218 if (atomic_read(&incl_state->common_attributes.data_ready))
219 hid_sensor_push_data(indio_dev,
220 (u8 *)incl_state->incl_val,
221 sizeof(incl_state->incl_val));
226 /* Capture samples in local storage */
227 static int incl_3d_capture_sample(struct hid_sensor_hub_device *hsdev,
229 size_t raw_len, char *raw_data,
232 struct iio_dev *indio_dev = platform_get_drvdata(priv);
233 struct incl_3d_state *incl_state = iio_priv(indio_dev);
237 case HID_USAGE_SENSOR_ORIENT_TILT_X:
238 incl_state->incl_val[CHANNEL_SCAN_INDEX_X] = *(u32 *)raw_data;
240 case HID_USAGE_SENSOR_ORIENT_TILT_Y:
241 incl_state->incl_val[CHANNEL_SCAN_INDEX_Y] = *(u32 *)raw_data;
243 case HID_USAGE_SENSOR_ORIENT_TILT_Z:
244 incl_state->incl_val[CHANNEL_SCAN_INDEX_Z] = *(u32 *)raw_data;
254 /* Parse report which is specific to an usage id*/
255 static int incl_3d_parse_report(struct platform_device *pdev,
256 struct hid_sensor_hub_device *hsdev,
257 struct iio_chan_spec *channels,
259 struct incl_3d_state *st)
263 ret = sensor_hub_input_get_attribute_info(hsdev,
266 HID_USAGE_SENSOR_ORIENT_TILT_X,
267 &st->incl[CHANNEL_SCAN_INDEX_X]);
270 incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_X],
271 st->incl[CHANNEL_SCAN_INDEX_X].size);
273 ret = sensor_hub_input_get_attribute_info(hsdev,
276 HID_USAGE_SENSOR_ORIENT_TILT_Y,
277 &st->incl[CHANNEL_SCAN_INDEX_Y]);
280 incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Y],
281 st->incl[CHANNEL_SCAN_INDEX_Y].size);
283 ret = sensor_hub_input_get_attribute_info(hsdev,
286 HID_USAGE_SENSOR_ORIENT_TILT_Z,
287 &st->incl[CHANNEL_SCAN_INDEX_Z]);
290 incl_3d_adjust_channel_bit_mask(&channels[CHANNEL_SCAN_INDEX_Z],
291 st->incl[CHANNEL_SCAN_INDEX_Z].size);
293 dev_dbg(&pdev->dev, "incl_3d %x:%x, %x:%x, %x:%x\n",
295 st->incl[0].report_id,
296 st->incl[1].index, st->incl[1].report_id,
297 st->incl[2].index, st->incl[2].report_id);
299 st->scale_precision = hid_sensor_format_scale(
300 HID_USAGE_SENSOR_INCLINOMETER_3D,
301 &st->incl[CHANNEL_SCAN_INDEX_X],
302 &st->scale_pre_decml, &st->scale_post_decml);
304 /* Set Sensitivity field ids, when there is no individual modifier */
305 if (st->common_attributes.sensitivity.index < 0) {
306 sensor_hub_input_get_attribute_info(hsdev,
307 HID_FEATURE_REPORT, usage_id,
308 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
309 HID_USAGE_SENSOR_DATA_ORIENTATION,
310 &st->common_attributes.sensitivity);
311 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
312 st->common_attributes.sensitivity.index,
313 st->common_attributes.sensitivity.report_id);
318 /* Function to initialize the processing for usage id */
319 static int hid_incl_3d_probe(struct platform_device *pdev)
322 static char *name = "incli_3d";
323 struct iio_dev *indio_dev;
324 struct incl_3d_state *incl_state;
325 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
326 struct iio_chan_spec *channels;
328 indio_dev = devm_iio_device_alloc(&pdev->dev,
329 sizeof(struct incl_3d_state));
330 if (indio_dev == NULL)
333 platform_set_drvdata(pdev, indio_dev);
335 incl_state = iio_priv(indio_dev);
336 incl_state->common_attributes.hsdev = hsdev;
337 incl_state->common_attributes.pdev = pdev;
339 ret = hid_sensor_parse_common_attributes(hsdev,
340 HID_USAGE_SENSOR_INCLINOMETER_3D,
341 &incl_state->common_attributes);
343 dev_err(&pdev->dev, "failed to setup common attributes\n");
347 channels = kmemdup(incl_3d_channels, sizeof(incl_3d_channels),
350 dev_err(&pdev->dev, "failed to duplicate channels\n");
354 ret = incl_3d_parse_report(pdev, hsdev, channels,
355 HID_USAGE_SENSOR_INCLINOMETER_3D, incl_state);
357 dev_err(&pdev->dev, "failed to setup attributes\n");
358 goto error_free_dev_mem;
361 indio_dev->channels = channels;
362 indio_dev->num_channels = ARRAY_SIZE(incl_3d_channels);
363 indio_dev->dev.parent = &pdev->dev;
364 indio_dev->info = &incl_3d_info;
365 indio_dev->name = name;
366 indio_dev->modes = INDIO_DIRECT_MODE;
368 ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
371 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
372 goto error_free_dev_mem;
374 atomic_set(&incl_state->common_attributes.data_ready, 0);
375 ret = hid_sensor_setup_trigger(indio_dev, name,
376 &incl_state->common_attributes);
378 dev_err(&pdev->dev, "trigger setup failed\n");
379 goto error_unreg_buffer_funcs;
382 ret = iio_device_register(indio_dev);
384 dev_err(&pdev->dev, "device register failed\n");
385 goto error_remove_trigger;
388 incl_state->callbacks.send_event = incl_3d_proc_event;
389 incl_state->callbacks.capture_sample = incl_3d_capture_sample;
390 incl_state->callbacks.pdev = pdev;
391 ret = sensor_hub_register_callback(hsdev,
392 HID_USAGE_SENSOR_INCLINOMETER_3D,
393 &incl_state->callbacks);
395 dev_err(&pdev->dev, "callback reg failed\n");
396 goto error_iio_unreg;
402 iio_device_unregister(indio_dev);
403 error_remove_trigger:
404 hid_sensor_remove_trigger(&incl_state->common_attributes);
405 error_unreg_buffer_funcs:
406 iio_triggered_buffer_cleanup(indio_dev);
408 kfree(indio_dev->channels);
412 /* Function to deinitialize the processing for usage id */
413 static int hid_incl_3d_remove(struct platform_device *pdev)
415 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
416 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
417 struct incl_3d_state *incl_state = iio_priv(indio_dev);
419 sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_INCLINOMETER_3D);
420 iio_device_unregister(indio_dev);
421 hid_sensor_remove_trigger(&incl_state->common_attributes);
422 iio_triggered_buffer_cleanup(indio_dev);
423 kfree(indio_dev->channels);
428 static struct platform_device_id hid_incl_3d_ids[] = {
430 /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
431 .name = "HID-SENSOR-200086",
435 MODULE_DEVICE_TABLE(platform, hid_incl_3d_ids);
437 static struct platform_driver hid_incl_3d_platform_driver = {
438 .id_table = hid_incl_3d_ids,
440 .name = KBUILD_MODNAME,
442 .probe = hid_incl_3d_probe,
443 .remove = hid_incl_3d_remove,
445 module_platform_driver(hid_incl_3d_platform_driver);
447 MODULE_DESCRIPTION("HID Sensor Inclinometer 3D");
448 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
449 MODULE_LICENSE("GPL");