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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * HID Sensors Driver
4 * Copyright (c) 2014, Intel Corporation.
5 */
6#include <linux/device.h>
7#include <linux/platform_device.h>
8#include <linux/module.h>
9#include <linux/mod_devicetable.h>
10#include <linux/slab.h>
11#include <linux/hid-sensor-hub.h>
12#include <linux/iio/iio.h>
13#include <linux/iio/buffer.h>
14#include "../common/hid-sensors/hid-sensor-trigger.h"
15
16static const u32 prox_usage_ids[] = {
17 HID_USAGE_SENSOR_HUMAN_PRESENCE,
18 HID_USAGE_SENSOR_HUMAN_PROXIMITY,
19 HID_USAGE_SENSOR_HUMAN_ATTENTION,
20};
21
22#define MAX_CHANNELS ARRAY_SIZE(prox_usage_ids)
23
24enum {
25 HID_HUMAN_PRESENCE,
26 HID_HUMAN_PROXIMITY,
27 HID_HUMAN_ATTENTION,
28};
29
30struct prox_state {
31 struct hid_sensor_hub_callbacks callbacks;
32 struct hid_sensor_common common_attributes;
33 struct hid_sensor_hub_attribute_info prox_attr[MAX_CHANNELS];
34 struct iio_chan_spec channels[MAX_CHANNELS];
35 u32 channel2usage[MAX_CHANNELS];
36 u32 human_presence[MAX_CHANNELS];
37 int scale_pre_decml;
38 int scale_post_decml;
39 int scale_precision;
40 unsigned long scan_mask[2]; /* One entry plus one terminator. */
41 int num_channels;
42};
43
44static const u32 prox_sensitivity_addresses[] = {
45 HID_USAGE_SENSOR_HUMAN_PRESENCE,
46 HID_USAGE_SENSOR_DATA_PRESENCE,
47};
48
49#define PROX_CHANNEL(_is_proximity, _channel) \
50 {\
51 .type = _is_proximity ? IIO_PROXIMITY : IIO_ATTENTION,\
52 .info_mask_separate = \
53 (_is_proximity ? BIT(IIO_CHAN_INFO_RAW) :\
54 BIT(IIO_CHAN_INFO_PROCESSED)) |\
55 BIT(IIO_CHAN_INFO_OFFSET) |\
56 BIT(IIO_CHAN_INFO_SCALE) |\
57 BIT(IIO_CHAN_INFO_SAMP_FREQ) |\
58 BIT(IIO_CHAN_INFO_HYSTERESIS),\
59 .indexed = _is_proximity,\
60 .channel = _channel,\
61 }
62
63/* Channel definitions (same order as prox_usage_ids) */
64static const struct iio_chan_spec prox_channels[] = {
65 PROX_CHANNEL(true, HID_HUMAN_PRESENCE),
66 PROX_CHANNEL(true, HID_HUMAN_PROXIMITY),
67 PROX_CHANNEL(false, 0),
68};
69
70/* Adjust channel real bits based on report descriptor */
71static void prox_adjust_channel_bit_mask(struct iio_chan_spec *channels,
72 int channel, int size)
73{
74 channels[channel].scan_type.sign = 's';
75 /* Real storage bits will change based on the report desc. */
76 channels[channel].scan_type.realbits = size * 8;
77 /* Maximum size of a sample to capture is u32 */
78 channels[channel].scan_type.storagebits = sizeof(u32) * 8;
79}
80
81/* Channel read_raw handler */
82static int prox_read_raw(struct iio_dev *indio_dev,
83 struct iio_chan_spec const *chan,
84 int *val, int *val2,
85 long mask)
86{
87 struct prox_state *prox_state = iio_priv(indio_dev);
88 struct hid_sensor_hub_device *hsdev;
89 int report_id;
90 u32 address;
91 int ret_type;
92 s32 min;
93
94 *val = 0;
95 *val2 = 0;
96 switch (mask) {
97 case IIO_CHAN_INFO_RAW:
98 if (chan->scan_index >= prox_state->num_channels)
99 return -EINVAL;
100 address = prox_state->channel2usage[chan->scan_index];
101 report_id = prox_state->prox_attr[chan->scan_index].report_id;
102 hsdev = prox_state->common_attributes.hsdev;
103 min = prox_state->prox_attr[chan->scan_index].logical_minimum;
104 hid_sensor_power_state(&prox_state->common_attributes, true);
105 *val = sensor_hub_input_attr_get_raw_value(hsdev,
106 hsdev->usage,
107 address,
108 report_id,
109 SENSOR_HUB_SYNC,
110 min < 0);
111 if (prox_state->channel2usage[chan->scan_index] ==
112 HID_USAGE_SENSOR_HUMAN_ATTENTION)
113 *val *= 100;
114 hid_sensor_power_state(&prox_state->common_attributes, false);
115 ret_type = IIO_VAL_INT;
116 break;
117 case IIO_CHAN_INFO_SCALE:
118 *val = prox_state->scale_pre_decml;
119 *val2 = prox_state->scale_post_decml;
120 ret_type = prox_state->scale_precision;
121 break;
122 case IIO_CHAN_INFO_OFFSET:
123 *val = hid_sensor_convert_exponent(
124 prox_state->prox_attr[chan->scan_index].unit_expo);
125 ret_type = IIO_VAL_INT;
126 break;
127 case IIO_CHAN_INFO_SAMP_FREQ:
128 ret_type = hid_sensor_read_samp_freq_value(
129 &prox_state->common_attributes, val, val2);
130 break;
131 case IIO_CHAN_INFO_HYSTERESIS:
132 ret_type = hid_sensor_read_raw_hyst_value(
133 &prox_state->common_attributes, val, val2);
134 break;
135 default:
136 ret_type = -EINVAL;
137 break;
138 }
139
140 return ret_type;
141}
142
143/* Channel write_raw handler */
144static int prox_write_raw(struct iio_dev *indio_dev,
145 struct iio_chan_spec const *chan,
146 int val,
147 int val2,
148 long mask)
149{
150 struct prox_state *prox_state = iio_priv(indio_dev);
151 int ret = 0;
152
153 switch (mask) {
154 case IIO_CHAN_INFO_SAMP_FREQ:
155 ret = hid_sensor_write_samp_freq_value(
156 &prox_state->common_attributes, val, val2);
157 break;
158 case IIO_CHAN_INFO_HYSTERESIS:
159 ret = hid_sensor_write_raw_hyst_value(
160 &prox_state->common_attributes, val, val2);
161 break;
162 default:
163 ret = -EINVAL;
164 }
165
166 return ret;
167}
168
169static const struct iio_info prox_info = {
170 .read_raw = &prox_read_raw,
171 .write_raw = &prox_write_raw,
172};
173
174/* Callback handler to send event after all samples are received and captured */
175static int prox_proc_event(struct hid_sensor_hub_device *hsdev,
176 unsigned usage_id,
177 void *priv)
178{
179 struct iio_dev *indio_dev = platform_get_drvdata(priv);
180 struct prox_state *prox_state = iio_priv(indio_dev);
181
182 dev_dbg(&indio_dev->dev, "prox_proc_event\n");
183 if (atomic_read(&prox_state->common_attributes.data_ready)) {
184 dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
185 iio_push_to_buffers(indio_dev, &prox_state->human_presence);
186 }
187
188 return 0;
189}
190
191/* Capture samples in local storage */
192static int prox_capture_sample(struct hid_sensor_hub_device *hsdev,
193 unsigned usage_id,
194 size_t raw_len, char *raw_data,
195 void *priv)
196{
197 struct iio_dev *indio_dev = platform_get_drvdata(priv);
198 struct prox_state *prox_state = iio_priv(indio_dev);
199 int multiplier = 1;
200 int chan;
201
202 for (chan = 0; chan < prox_state->num_channels; chan++)
203 if (prox_state->channel2usage[chan] == usage_id)
204 break;
205 if (chan == prox_state->num_channels)
206 return -EINVAL;
207
208 if (usage_id == HID_USAGE_SENSOR_HUMAN_ATTENTION)
209 multiplier = 100;
210
211 switch (raw_len) {
212 case 1:
213 prox_state->human_presence[chan] = *(u8 *)raw_data * multiplier;
214 return 0;
215 case 4:
216 prox_state->human_presence[chan] = *(u32 *)raw_data * multiplier;
217 return 0;
218 }
219
220 return -EINVAL;
221}
222
223/* Parse report which is specific to an usage id*/
224static int prox_parse_report(struct platform_device *pdev,
225 struct hid_sensor_hub_device *hsdev,
226 struct prox_state *st)
227{
228 struct iio_chan_spec *channels = st->channels;
229 int index = 0;
230 int ret;
231 int i;
232
233 for (i = 0; i < MAX_CHANNELS; i++) {
234 u32 usage_id = prox_usage_ids[i];
235
236 ret = sensor_hub_input_get_attribute_info(hsdev,
237 HID_INPUT_REPORT,
238 hsdev->usage,
239 usage_id,
240 &st->prox_attr[index]);
241 if (ret < 0)
242 continue;
243 st->channel2usage[index] = usage_id;
244 st->scan_mask[0] |= BIT(index);
245 channels[index] = prox_channels[i];
246 channels[index].scan_index = index;
247 prox_adjust_channel_bit_mask(channels, index,
248 st->prox_attr[index].size);
249 dev_dbg(&pdev->dev, "prox %x:%x\n", st->prox_attr[index].index,
250 st->prox_attr[index].report_id);
251 index++;
252 }
253
254 if (!index)
255 return ret;
256
257 st->num_channels = index;
258
259 return 0;
260}
261
262/* Function to initialize the processing for usage id */
263static int hid_prox_probe(struct platform_device *pdev)
264{
265 struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev);
266 int ret = 0;
267 static const char *name = "prox";
268 struct iio_dev *indio_dev;
269 struct prox_state *prox_state;
270
271 indio_dev = devm_iio_device_alloc(&pdev->dev,
272 sizeof(struct prox_state));
273 if (!indio_dev)
274 return -ENOMEM;
275 platform_set_drvdata(pdev, indio_dev);
276
277 prox_state = iio_priv(indio_dev);
278 prox_state->common_attributes.hsdev = hsdev;
279 prox_state->common_attributes.pdev = pdev;
280
281 ret = hid_sensor_parse_common_attributes(hsdev, hsdev->usage,
282 &prox_state->common_attributes,
283 prox_sensitivity_addresses,
284 ARRAY_SIZE(prox_sensitivity_addresses));
285 if (ret) {
286 dev_err(&pdev->dev, "failed to setup common attributes\n");
287 return ret;
288 }
289
290 ret = prox_parse_report(pdev, hsdev, prox_state);
291 if (ret) {
292 dev_err(&pdev->dev, "failed to setup attributes\n");
293 return ret;
294 }
295
296 indio_dev->num_channels = prox_state->num_channels;
297 indio_dev->channels = prox_state->channels;
298 indio_dev->available_scan_masks = prox_state->scan_mask;
299 indio_dev->info = &prox_info;
300 indio_dev->name = name;
301 indio_dev->modes = INDIO_DIRECT_MODE;
302
303 atomic_set(&prox_state->common_attributes.data_ready, 0);
304
305 ret = hid_sensor_setup_trigger(indio_dev, name,
306 &prox_state->common_attributes);
307 if (ret) {
308 dev_err(&pdev->dev, "trigger setup failed\n");
309 return ret;
310 }
311
312 ret = iio_device_register(indio_dev);
313 if (ret) {
314 dev_err(&pdev->dev, "device register failed\n");
315 goto error_remove_trigger;
316 }
317
318 prox_state->callbacks.send_event = prox_proc_event;
319 prox_state->callbacks.capture_sample = prox_capture_sample;
320 prox_state->callbacks.pdev = pdev;
321 ret = sensor_hub_register_callback(hsdev, hsdev->usage,
322 &prox_state->callbacks);
323 if (ret < 0) {
324 dev_err(&pdev->dev, "callback reg failed\n");
325 goto error_iio_unreg;
326 }
327
328 return ret;
329
330error_iio_unreg:
331 iio_device_unregister(indio_dev);
332error_remove_trigger:
333 hid_sensor_remove_trigger(indio_dev, &prox_state->common_attributes);
334 return ret;
335}
336
337/* Function to deinitialize the processing for usage id */
338static void hid_prox_remove(struct platform_device *pdev)
339{
340 struct hid_sensor_hub_device *hsdev = dev_get_platdata(&pdev->dev);
341 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
342 struct prox_state *prox_state = iio_priv(indio_dev);
343
344 sensor_hub_remove_callback(hsdev, hsdev->usage);
345 iio_device_unregister(indio_dev);
346 hid_sensor_remove_trigger(indio_dev, &prox_state->common_attributes);
347}
348
349static const struct platform_device_id hid_prox_ids[] = {
350 {
351 /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
352 .name = "HID-SENSOR-200011",
353 },
354 {
355 /* Format: HID-SENSOR-tag-usage_id_in_hex_lowercase */
356 .name = "HID-SENSOR-LISS-0226",
357 },
358 { /* sentinel */ }
359};
360MODULE_DEVICE_TABLE(platform, hid_prox_ids);
361
362static struct platform_driver hid_prox_platform_driver = {
363 .id_table = hid_prox_ids,
364 .driver = {
365 .name = KBUILD_MODNAME,
366 .pm = &hid_sensor_pm_ops,
367 },
368 .probe = hid_prox_probe,
369 .remove = hid_prox_remove,
370};
371module_platform_driver(hid_prox_platform_driver);
372
373MODULE_DESCRIPTION("HID Sensor Proximity");
374MODULE_AUTHOR("Archana Patni <archana.patni@intel.com>");
375MODULE_LICENSE("GPL");
376MODULE_IMPORT_NS("IIO_HID");
1/*
2 * HID Sensors Driver
3 * Copyright (c) 2014, Intel Corporation.
4 *
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.
8 *
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
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program.
16 *
17 */
18#include <linux/device.h>
19#include <linux/platform_device.h>
20#include <linux/module.h>
21#include <linux/interrupt.h>
22#include <linux/irq.h>
23#include <linux/slab.h>
24#include <linux/delay.h>
25#include <linux/hid-sensor-hub.h>
26#include <linux/iio/iio.h>
27#include <linux/iio/sysfs.h>
28#include <linux/iio/buffer.h>
29#include <linux/iio/trigger_consumer.h>
30#include <linux/iio/triggered_buffer.h>
31#include "../common/hid-sensors/hid-sensor-trigger.h"
32
33#define CHANNEL_SCAN_INDEX_PRESENCE 0
34
35struct prox_state {
36 struct hid_sensor_hub_callbacks callbacks;
37 struct hid_sensor_common common_attributes;
38 struct hid_sensor_hub_attribute_info prox_attr;
39 u32 human_presence;
40};
41
42/* Channel definitions */
43static const struct iio_chan_spec prox_channels[] = {
44 {
45 .type = IIO_PROXIMITY,
46 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
47 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
48 BIT(IIO_CHAN_INFO_SCALE) |
49 BIT(IIO_CHAN_INFO_SAMP_FREQ) |
50 BIT(IIO_CHAN_INFO_HYSTERESIS),
51 .scan_index = CHANNEL_SCAN_INDEX_PRESENCE,
52 }
53};
54
55/* Adjust channel real bits based on report descriptor */
56static void prox_adjust_channel_bit_mask(struct iio_chan_spec *channels,
57 int channel, int size)
58{
59 channels[channel].scan_type.sign = 's';
60 /* Real storage bits will change based on the report desc. */
61 channels[channel].scan_type.realbits = size * 8;
62 /* Maximum size of a sample to capture is u32 */
63 channels[channel].scan_type.storagebits = sizeof(u32) * 8;
64}
65
66/* Channel read_raw handler */
67static int prox_read_raw(struct iio_dev *indio_dev,
68 struct iio_chan_spec const *chan,
69 int *val, int *val2,
70 long mask)
71{
72 struct prox_state *prox_state = iio_priv(indio_dev);
73 int report_id = -1;
74 u32 address;
75 int ret_type;
76
77 *val = 0;
78 *val2 = 0;
79 switch (mask) {
80 case IIO_CHAN_INFO_RAW:
81 switch (chan->scan_index) {
82 case CHANNEL_SCAN_INDEX_PRESENCE:
83 report_id = prox_state->prox_attr.report_id;
84 address =
85 HID_USAGE_SENSOR_HUMAN_PRESENCE;
86 break;
87 default:
88 report_id = -1;
89 break;
90 }
91 if (report_id >= 0) {
92 hid_sensor_power_state(&prox_state->common_attributes,
93 true);
94 *val = sensor_hub_input_attr_get_raw_value(
95 prox_state->common_attributes.hsdev,
96 HID_USAGE_SENSOR_PROX, address,
97 report_id,
98 SENSOR_HUB_SYNC);
99 hid_sensor_power_state(&prox_state->common_attributes,
100 false);
101 } else {
102 *val = 0;
103 return -EINVAL;
104 }
105 ret_type = IIO_VAL_INT;
106 break;
107 case IIO_CHAN_INFO_SCALE:
108 *val = prox_state->prox_attr.units;
109 ret_type = IIO_VAL_INT;
110 break;
111 case IIO_CHAN_INFO_OFFSET:
112 *val = hid_sensor_convert_exponent(
113 prox_state->prox_attr.unit_expo);
114 ret_type = IIO_VAL_INT;
115 break;
116 case IIO_CHAN_INFO_SAMP_FREQ:
117 ret_type = hid_sensor_read_samp_freq_value(
118 &prox_state->common_attributes, val, val2);
119 break;
120 case IIO_CHAN_INFO_HYSTERESIS:
121 ret_type = hid_sensor_read_raw_hyst_value(
122 &prox_state->common_attributes, val, val2);
123 break;
124 default:
125 ret_type = -EINVAL;
126 break;
127 }
128
129 return ret_type;
130}
131
132/* Channel write_raw handler */
133static int prox_write_raw(struct iio_dev *indio_dev,
134 struct iio_chan_spec const *chan,
135 int val,
136 int val2,
137 long mask)
138{
139 struct prox_state *prox_state = iio_priv(indio_dev);
140 int ret = 0;
141
142 switch (mask) {
143 case IIO_CHAN_INFO_SAMP_FREQ:
144 ret = hid_sensor_write_samp_freq_value(
145 &prox_state->common_attributes, val, val2);
146 break;
147 case IIO_CHAN_INFO_HYSTERESIS:
148 ret = hid_sensor_write_raw_hyst_value(
149 &prox_state->common_attributes, val, val2);
150 break;
151 default:
152 ret = -EINVAL;
153 }
154
155 return ret;
156}
157
158static const struct iio_info prox_info = {
159 .driver_module = THIS_MODULE,
160 .read_raw = &prox_read_raw,
161 .write_raw = &prox_write_raw,
162};
163
164/* Function to push data to buffer */
165static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
166 int len)
167{
168 dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
169 iio_push_to_buffers(indio_dev, data);
170}
171
172/* Callback handler to send event after all samples are received and captured */
173static int prox_proc_event(struct hid_sensor_hub_device *hsdev,
174 unsigned usage_id,
175 void *priv)
176{
177 struct iio_dev *indio_dev = platform_get_drvdata(priv);
178 struct prox_state *prox_state = iio_priv(indio_dev);
179
180 dev_dbg(&indio_dev->dev, "prox_proc_event\n");
181 if (atomic_read(&prox_state->common_attributes.data_ready))
182 hid_sensor_push_data(indio_dev,
183 &prox_state->human_presence,
184 sizeof(prox_state->human_presence));
185
186 return 0;
187}
188
189/* Capture samples in local storage */
190static int prox_capture_sample(struct hid_sensor_hub_device *hsdev,
191 unsigned usage_id,
192 size_t raw_len, char *raw_data,
193 void *priv)
194{
195 struct iio_dev *indio_dev = platform_get_drvdata(priv);
196 struct prox_state *prox_state = iio_priv(indio_dev);
197 int ret = -EINVAL;
198
199 switch (usage_id) {
200 case HID_USAGE_SENSOR_HUMAN_PRESENCE:
201 prox_state->human_presence = *(u32 *)raw_data;
202 ret = 0;
203 break;
204 default:
205 break;
206 }
207
208 return ret;
209}
210
211/* Parse report which is specific to an usage id*/
212static int prox_parse_report(struct platform_device *pdev,
213 struct hid_sensor_hub_device *hsdev,
214 struct iio_chan_spec *channels,
215 unsigned usage_id,
216 struct prox_state *st)
217{
218 int ret;
219
220 ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
221 usage_id,
222 HID_USAGE_SENSOR_HUMAN_PRESENCE,
223 &st->prox_attr);
224 if (ret < 0)
225 return ret;
226 prox_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_PRESENCE,
227 st->prox_attr.size);
228
229 dev_dbg(&pdev->dev, "prox %x:%x\n", st->prox_attr.index,
230 st->prox_attr.report_id);
231
232 /* Set Sensitivity field ids, when there is no individual modifier */
233 if (st->common_attributes.sensitivity.index < 0) {
234 sensor_hub_input_get_attribute_info(hsdev,
235 HID_FEATURE_REPORT, usage_id,
236 HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
237 HID_USAGE_SENSOR_DATA_PRESENCE,
238 &st->common_attributes.sensitivity);
239 dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
240 st->common_attributes.sensitivity.index,
241 st->common_attributes.sensitivity.report_id);
242 }
243 return ret;
244}
245
246/* Function to initialize the processing for usage id */
247static int hid_prox_probe(struct platform_device *pdev)
248{
249 int ret = 0;
250 static const char *name = "prox";
251 struct iio_dev *indio_dev;
252 struct prox_state *prox_state;
253 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
254
255 indio_dev = devm_iio_device_alloc(&pdev->dev,
256 sizeof(struct prox_state));
257 if (!indio_dev)
258 return -ENOMEM;
259 platform_set_drvdata(pdev, indio_dev);
260
261 prox_state = iio_priv(indio_dev);
262 prox_state->common_attributes.hsdev = hsdev;
263 prox_state->common_attributes.pdev = pdev;
264
265 ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_PROX,
266 &prox_state->common_attributes);
267 if (ret) {
268 dev_err(&pdev->dev, "failed to setup common attributes\n");
269 return ret;
270 }
271
272 indio_dev->channels = kmemdup(prox_channels, sizeof(prox_channels),
273 GFP_KERNEL);
274 if (!indio_dev->channels) {
275 dev_err(&pdev->dev, "failed to duplicate channels\n");
276 return -ENOMEM;
277 }
278
279 ret = prox_parse_report(pdev, hsdev,
280 (struct iio_chan_spec *)indio_dev->channels,
281 HID_USAGE_SENSOR_PROX, prox_state);
282 if (ret) {
283 dev_err(&pdev->dev, "failed to setup attributes\n");
284 goto error_free_dev_mem;
285 }
286
287 indio_dev->num_channels = ARRAY_SIZE(prox_channels);
288 indio_dev->dev.parent = &pdev->dev;
289 indio_dev->info = &prox_info;
290 indio_dev->name = name;
291 indio_dev->modes = INDIO_DIRECT_MODE;
292
293 ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
294 NULL, NULL);
295 if (ret) {
296 dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
297 goto error_free_dev_mem;
298 }
299 atomic_set(&prox_state->common_attributes.data_ready, 0);
300 ret = hid_sensor_setup_trigger(indio_dev, name,
301 &prox_state->common_attributes);
302 if (ret) {
303 dev_err(&pdev->dev, "trigger setup failed\n");
304 goto error_unreg_buffer_funcs;
305 }
306
307 ret = iio_device_register(indio_dev);
308 if (ret) {
309 dev_err(&pdev->dev, "device register failed\n");
310 goto error_remove_trigger;
311 }
312
313 prox_state->callbacks.send_event = prox_proc_event;
314 prox_state->callbacks.capture_sample = prox_capture_sample;
315 prox_state->callbacks.pdev = pdev;
316 ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_PROX,
317 &prox_state->callbacks);
318 if (ret < 0) {
319 dev_err(&pdev->dev, "callback reg failed\n");
320 goto error_iio_unreg;
321 }
322
323 return ret;
324
325error_iio_unreg:
326 iio_device_unregister(indio_dev);
327error_remove_trigger:
328 hid_sensor_remove_trigger(&prox_state->common_attributes);
329error_unreg_buffer_funcs:
330 iio_triggered_buffer_cleanup(indio_dev);
331error_free_dev_mem:
332 kfree(indio_dev->channels);
333 return ret;
334}
335
336/* Function to deinitialize the processing for usage id */
337static int hid_prox_remove(struct platform_device *pdev)
338{
339 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
340 struct iio_dev *indio_dev = platform_get_drvdata(pdev);
341 struct prox_state *prox_state = iio_priv(indio_dev);
342
343 sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_PROX);
344 iio_device_unregister(indio_dev);
345 hid_sensor_remove_trigger(&prox_state->common_attributes);
346 iio_triggered_buffer_cleanup(indio_dev);
347 kfree(indio_dev->channels);
348
349 return 0;
350}
351
352static const struct platform_device_id hid_prox_ids[] = {
353 {
354 /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
355 .name = "HID-SENSOR-200011",
356 },
357 { /* sentinel */ }
358};
359MODULE_DEVICE_TABLE(platform, hid_prox_ids);
360
361static struct platform_driver hid_prox_platform_driver = {
362 .id_table = hid_prox_ids,
363 .driver = {
364 .name = KBUILD_MODNAME,
365 .pm = &hid_sensor_pm_ops,
366 },
367 .probe = hid_prox_probe,
368 .remove = hid_prox_remove,
369};
370module_platform_driver(hid_prox_platform_driver);
371
372MODULE_DESCRIPTION("HID Sensor Proximity");
373MODULE_AUTHOR("Archana Patni <archana.patni@intel.com>");
374MODULE_LICENSE("GPL");