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Merge tag 'pm-5.12-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
[linux-2.6-block.git] / drivers / hid / hid-sensor-custom.c
CommitLineData
2025cf9e 1// SPDX-License-Identifier: GPL-2.0-only
4a7de051
SP		 2/*
3 * hid-sensor-custom.c
4 * Copyright (c) 2015, Intel Corporation.
4a7de051
SP		 5 */
6
23931967 7#include <linux/ctype.h>
4a7de051
SP		 8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/init.h>
11#include <linux/miscdevice.h>
12#include <linux/kfifo.h>
13#include <linux/sched.h>
14#include <linux/wait.h>
15#include <linux/poll.h>
16#include <linux/bsearch.h>
17#include <linux/platform_device.h>
18#include <linux/hid-sensor-hub.h>
19
20#define HID_CUSTOM_NAME_LENGTH 64
21#define HID_CUSTOM_MAX_CORE_ATTRS 10
22#define HID_CUSTOM_TOTAL_ATTRS (HID_CUSTOM_MAX_CORE_ATTRS + 1)
23#define HID_CUSTOM_FIFO_SIZE 4096
24#define HID_CUSTOM_MAX_FEATURE_BYTES 64
23931967 25#define HID_SENSOR_USAGE_LENGTH (4 + 1)
4a7de051
SP		 26
27struct hid_sensor_custom_field {
28 int report_id;
29 char group_name[HID_CUSTOM_NAME_LENGTH];
30 struct hid_sensor_hub_attribute_info attribute;
31 struct device_attribute sd_attrs[HID_CUSTOM_MAX_CORE_ATTRS];
32 char attr_name[HID_CUSTOM_TOTAL_ATTRS][HID_CUSTOM_NAME_LENGTH];
33 struct attribute *attrs[HID_CUSTOM_TOTAL_ATTRS];
34 struct attribute_group hid_custom_attribute_group;
35};
36
37struct hid_sensor_custom {
38 struct mutex mutex;
39 struct platform_device *pdev;
40 struct hid_sensor_hub_device *hsdev;
41 struct hid_sensor_hub_callbacks callbacks;
42 int sensor_field_count;
43 struct hid_sensor_custom_field *fields;
44 int input_field_count;
45 int input_report_size;
46 int input_report_recd_size;
47 bool input_skip_sample;
48 bool enable;
49 struct hid_sensor_custom_field *power_state;
50 struct hid_sensor_custom_field *report_state;
51 struct miscdevice custom_dev;
52 struct kfifo data_fifo;
53 unsigned long misc_opened;
54 wait_queue_head_t wait;
23931967 55 struct platform_device *custom_pdev;
4a7de051
SP		 56};
57
58/* Header for each sample to user space via dev interface */
59struct hid_sensor_sample {
60 u32 usage_id;
61 u64 timestamp;
62 u32 raw_len;
63} __packed;
64
65static struct attribute hid_custom_attrs[] = {
66 {.name = "name", .mode = S_IRUGO},
67 {.name = "units", .mode = S_IRUGO},
68 {.name = "unit-expo", .mode = S_IRUGO},
69 {.name = "minimum", .mode = S_IRUGO},
70 {.name = "maximum", .mode = S_IRUGO},
71 {.name = "size", .mode = S_IRUGO},
72 {.name = "value", .mode = S_IWUSR | S_IRUGO},
73 {.name = NULL}
74};
75
76static const struct hid_custom_usage_desc {
77 int usage_id;
78 char *desc;
79} hid_custom_usage_desc_table[] = {
80 {0x200201, "event-sensor-state"},
81 {0x200202, "event-sensor-event"},
82 {0x200301, "property-friendly-name"},
83 {0x200302, "property-persistent-unique-id"},
84 {0x200303, "property-sensor-status"},
85 {0x200304, "property-min-report-interval"},
86 {0x200305, "property-sensor-manufacturer"},
87 {0x200306, "property-sensor-model"},
88 {0x200307, "property-sensor-serial-number"},
89 {0x200308, "property-sensor-description"},
90 {0x200309, "property-sensor-connection-type"},
91 {0x20030A, "property-sensor-device-path"},
92 {0x20030B, "property-hardware-revision"},
93 {0x20030C, "property-firmware-version"},
94 {0x20030D, "property-release-date"},
95 {0x20030E, "property-report-interval"},
96 {0x20030F, "property-change-sensitivity-absolute"},
97 {0x200310, "property-change-sensitivity-percent-range"},
98 {0x200311, "property-change-sensitivity-percent-relative"},
99 {0x200312, "property-accuracy"},
100 {0x200313, "property-resolution"},
101 {0x200314, "property-maximum"},
102 {0x200315, "property-minimum"},
103 {0x200316, "property-reporting-state"},
104 {0x200317, "property-sampling-rate"},
105 {0x200318, "property-response-curve"},
106 {0x200319, "property-power-state"},
107 {0x200540, "data-field-custom"},
108 {0x200541, "data-field-custom-usage"},
109 {0x200542, "data-field-custom-boolean-array"},
110 {0x200543, "data-field-custom-value"},
111 {0x200544, "data-field-custom-value_1"},
112 {0x200545, "data-field-custom-value_2"},
113 {0x200546, "data-field-custom-value_3"},
114 {0x200547, "data-field-custom-value_4"},
115 {0x200548, "data-field-custom-value_5"},
116 {0x200549, "data-field-custom-value_6"},
117 {0x20054A, "data-field-custom-value_7"},
118 {0x20054B, "data-field-custom-value_8"},
119 {0x20054C, "data-field-custom-value_9"},
120 {0x20054D, "data-field-custom-value_10"},
121 {0x20054E, "data-field-custom-value_11"},
122 {0x20054F, "data-field-custom-value_12"},
123 {0x200550, "data-field-custom-value_13"},
124 {0x200551, "data-field-custom-value_14"},
125 {0x200552, "data-field-custom-value_15"},
126 {0x200553, "data-field-custom-value_16"},
127 {0x200554, "data-field-custom-value_17"},
128 {0x200555, "data-field-custom-value_18"},
129 {0x200556, "data-field-custom-value_19"},
130 {0x200557, "data-field-custom-value_20"},
131 {0x200558, "data-field-custom-value_21"},
132 {0x200559, "data-field-custom-value_22"},
133 {0x20055A, "data-field-custom-value_23"},
134 {0x20055B, "data-field-custom-value_24"},
135 {0x20055C, "data-field-custom-value_25"},
136 {0x20055D, "data-field-custom-value_26"},
137 {0x20055E, "data-field-custom-value_27"},
138 {0x20055F, "data-field-custom-value_28"},
139};
140
141static int usage_id_cmp(const void *p1, const void *p2)
142{
143 if (*(int *)p1 < *(int *)p2)
144 return -1;
145
146 if (*(int *)p1 > *(int *)p2)
147 return 1;
148
149 return 0;
150}
151
152static ssize_t enable_sensor_show(struct device *dev,
153 struct device_attribute *attr, char *buf)
154{
77f9f772 155 struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
4a7de051
SP		 156
157 return sprintf(buf, "%d\n", sensor_inst->enable);
158}
159
160static int set_power_report_state(struct hid_sensor_custom *sensor_inst,
161 bool state)
162{
163 int power_val = -1;
164 int report_val = -1;
165 u32 power_state_usage_id;
166 u32 report_state_usage_id;
167 int ret;
168
169 /*
170 * It is possible that the power/report state ids are not present.
171 * In this case this function will return success. But if the
172 * ids are present, then it will return error if set fails.
173 */
174 if (state) {
175 power_state_usage_id =
176 HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM;
177 report_state_usage_id =
178 HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM;
179 } else {
180 power_state_usage_id =
181 HID_USAGE_SENSOR_PROP_POWER_STATE_D4_POWER_OFF_ENUM;
182 report_state_usage_id =
183 HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM;
184 }
185
186 if (sensor_inst->power_state)
187 power_val = hid_sensor_get_usage_index(sensor_inst->hsdev,
188 sensor_inst->power_state->attribute.report_id,
189 sensor_inst->power_state->attribute.index,
190 power_state_usage_id);
191 if (sensor_inst->report_state)
192 report_val = hid_sensor_get_usage_index(sensor_inst->hsdev,
193 sensor_inst->report_state->attribute.report_id,
194 sensor_inst->report_state->attribute.index,
195 report_state_usage_id);
196
197 if (power_val >= 0) {
198 power_val +=
199 sensor_inst->power_state->attribute.logical_minimum;
200 ret = sensor_hub_set_feature(sensor_inst->hsdev,
201 sensor_inst->power_state->attribute.report_id,
202 sensor_inst->power_state->attribute.index,
203 sizeof(power_val),
204 &power_val);
205 if (ret) {
206 hid_err(sensor_inst->hsdev->hdev,
207 "Set power state failed\n");
208 return ret;
209 }
210 }
211
212 if (report_val >= 0) {
213 report_val +=
214 sensor_inst->report_state->attribute.logical_minimum;
215 ret = sensor_hub_set_feature(sensor_inst->hsdev,
216 sensor_inst->report_state->attribute.report_id,
217 sensor_inst->report_state->attribute.index,
218 sizeof(report_val),
219 &report_val);
220 if (ret) {
221 hid_err(sensor_inst->hsdev->hdev,
222 "Set report state failed\n");
223 return ret;
224 }
225 }
226
227 return 0;
228}
229
230static ssize_t enable_sensor_store(struct device *dev,
231 struct device_attribute *attr,
232 const char *buf, size_t count)
233{
77f9f772 234 struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
4a7de051
SP		 235 int value;
236 int ret = -EINVAL;
237
238 if (kstrtoint(buf, 0, &value) != 0)
239 return -EINVAL;
240
241 mutex_lock(&sensor_inst->mutex);
242 if (value && !sensor_inst->enable) {
243 ret = sensor_hub_device_open(sensor_inst->hsdev);
244 if (ret)
245 goto unlock_state;
246
247 ret = set_power_report_state(sensor_inst, true);
248 if (ret) {
249 sensor_hub_device_close(sensor_inst->hsdev);
250 goto unlock_state;
251 }
252 sensor_inst->enable = true;
253 } else if (!value && sensor_inst->enable) {
254 ret = set_power_report_state(sensor_inst, false);
255 sensor_hub_device_close(sensor_inst->hsdev);
256 sensor_inst->enable = false;
257 }
258unlock_state:
259 mutex_unlock(&sensor_inst->mutex);
260 if (ret < 0)
261 return ret;
262
263 return count;
264}
265static DEVICE_ATTR_RW(enable_sensor);
266
267static struct attribute *enable_sensor_attrs[] = {
268 &dev_attr_enable_sensor.attr,
269 NULL,
270};
271
58ee3e08 272static const struct attribute_group enable_sensor_attr_group = {
4a7de051
SP		 273 .attrs = enable_sensor_attrs,
274};
275
276static ssize_t show_value(struct device *dev, struct device_attribute *attr,
277 char *buf)
278{
77f9f772 279 struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
4a7de051
SP		 280 struct hid_sensor_hub_attribute_info *attribute;
281 int index, usage, field_index;
282 char name[HID_CUSTOM_NAME_LENGTH];
283 bool feature = false;
284 bool input = false;
285 int value = 0;
286
4c4480aa 287 if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage,
4a7de051
SP		 288 name) == 3) {
289 feature = true;
290 field_index = index + sensor_inst->input_field_count;
4c4480aa 291 } else if (sscanf(attr->attr.name, "input-%x-%x-%s", &index, &usage,
4a7de051
SP		 292 name) == 3) {
293 input = true;
294 field_index = index;
295 } else
296 return -EINVAL;
297
298 if (!strncmp(name, "value", strlen("value"))) {
299 u32 report_id;
300 int ret;
301
302 attribute = &sensor_inst->fields[field_index].attribute;
303 report_id = attribute->report_id;
304 if (feature) {
305 u8 values[HID_CUSTOM_MAX_FEATURE_BYTES];
306 int len = 0;
307 u64 value = 0;
308 int i = 0;
309
310 ret = sensor_hub_get_feature(sensor_inst->hsdev,
311 report_id,
312 index,
313 sizeof(values), values);
314 if (ret < 0)
315 return ret;
316
317 while (i < ret) {
318 if (i + attribute->size > ret) {
62a1a580 319 len += scnprintf(&buf[len],
4a7de051
SP		 320 PAGE_SIZE - len,
321 "%d ", values[i]);
322 break;
323 }
324 switch (attribute->size) {
325 case 2:
326 value = (u64) *(u16 *)&values[i];
327 i += attribute->size;
328 break;
329 case 4:
330 value = (u64) *(u32 *)&values[i];
331 i += attribute->size;
332 break;
333 case 8:
334 value = *(u64 *)&values[i];
335 i += attribute->size;
336 break;
337 default:
338 value = (u64) values[i];
339 ++i;
340 break;
341 }
62a1a580 342 len += scnprintf(&buf[len], PAGE_SIZE - len,
4a7de051
SP		 343 "%lld ", value);
344 }
62a1a580 345 len += scnprintf(&buf[len], PAGE_SIZE - len, "\n");
4a7de051
SP		 346
347 return len;
348 } else if (input)
349 value = sensor_hub_input_attr_get_raw_value(
350 sensor_inst->hsdev,
351 sensor_inst->hsdev->usage,
352 usage, report_id,
0145b505 353 SENSOR_HUB_SYNC, false);
4a7de051
SP		 354 } else if (!strncmp(name, "units", strlen("units")))
355 value = sensor_inst->fields[field_index].attribute.units;
356 else if (!strncmp(name, "unit-expo", strlen("unit-expo")))
357 value = sensor_inst->fields[field_index].attribute.unit_expo;
358 else if (!strncmp(name, "size", strlen("size")))
359 value = sensor_inst->fields[field_index].attribute.size;
360 else if (!strncmp(name, "minimum", strlen("minimum")))
361 value = sensor_inst->fields[field_index].attribute.
362 logical_minimum;
363 else if (!strncmp(name, "maximum", strlen("maximum")))
364 value = sensor_inst->fields[field_index].attribute.
365 logical_maximum;
366 else if (!strncmp(name, "name", strlen("name"))) {
367 struct hid_custom_usage_desc *usage_desc;
368
369 usage_desc = bsearch(&usage, hid_custom_usage_desc_table,
370 ARRAY_SIZE(hid_custom_usage_desc_table),
371 sizeof(struct hid_custom_usage_desc),
372 usage_id_cmp);
373 if (usage_desc)
374 return snprintf(buf, PAGE_SIZE, "%s\n",
375 usage_desc->desc);
376 else
377 return sprintf(buf, "not-specified\n");
378 } else
379 return -EINVAL;
380
381 return sprintf(buf, "%d\n", value);
382}
383
384static ssize_t store_value(struct device *dev, struct device_attribute *attr,
385 const char *buf, size_t count)
386{
77f9f772 387 struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
4a7de051
SP		 388 int index, field_index, usage;
389 char name[HID_CUSTOM_NAME_LENGTH];
390 int value;
391
4c4480aa 392 if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage,
4a7de051
SP		 393 name) == 3) {
394 field_index = index + sensor_inst->input_field_count;
395 } else
396 return -EINVAL;
397
398 if (!strncmp(name, "value", strlen("value"))) {
399 u32 report_id;
400 int ret;
401
402 if (kstrtoint(buf, 0, &value) != 0)
403 return -EINVAL;
404
405 report_id = sensor_inst->fields[field_index].attribute.
406 report_id;
407 ret = sensor_hub_set_feature(sensor_inst->hsdev, report_id,
408 index, sizeof(value), &value);
409 } else
410 return -EINVAL;
411
412 return count;
413}
414
415static int hid_sensor_capture_sample(struct hid_sensor_hub_device *hsdev,
416 unsigned usage_id, size_t raw_len,
417 char *raw_data, void *priv)
418{
419 struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv);
420 struct hid_sensor_sample header;
421
422 /* If any error occurs in a sample, rest of the fields are ignored */
423 if (sensor_inst->input_skip_sample) {
424 hid_err(sensor_inst->hsdev->hdev, "Skipped remaining data\n");
425 return 0;
426 }
427
428 hid_dbg(sensor_inst->hsdev->hdev, "%s received %d of %d\n", __func__,
429 (int) (sensor_inst->input_report_recd_size + raw_len),
430 sensor_inst->input_report_size);
431
432 if (!test_bit(0, &sensor_inst->misc_opened))
433 return 0;
434
435 if (!sensor_inst->input_report_recd_size) {
436 int required_size = sizeof(struct hid_sensor_sample) +
437 sensor_inst->input_report_size;
438 header.usage_id = hsdev->usage;
439 header.raw_len = sensor_inst->input_report_size;
440 header.timestamp = ktime_get_real_ns();
441 if (kfifo_avail(&sensor_inst->data_fifo) >= required_size) {
442 kfifo_in(&sensor_inst->data_fifo,
443 (unsigned char *)&header,
444 sizeof(header));
445 } else
446 sensor_inst->input_skip_sample = true;
447 }
448 if (kfifo_avail(&sensor_inst->data_fifo) >= raw_len)
449 kfifo_in(&sensor_inst->data_fifo, (unsigned char *)raw_data,
450 raw_len);
451
452 sensor_inst->input_report_recd_size += raw_len;
453
454 return 0;
455}
456
457static int hid_sensor_send_event(struct hid_sensor_hub_device *hsdev,
458 unsigned usage_id, void *priv)
459{
460 struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv);
461
462 if (!test_bit(0, &sensor_inst->misc_opened))
463 return 0;
464
465 sensor_inst->input_report_recd_size = 0;
466 sensor_inst->input_skip_sample = false;
467
468 wake_up(&sensor_inst->wait);
469
470 return 0;
471}
472
473static int hid_sensor_custom_add_field(struct hid_sensor_custom *sensor_inst,
474 int index, int report_type,
475 struct hid_report *report,
476 struct hid_field *field)
477{
478 struct hid_sensor_custom_field *sensor_field;
479 void *fields;
480
481 fields = krealloc(sensor_inst->fields,
482 (sensor_inst->sensor_field_count + 1) *
483 sizeof(struct hid_sensor_custom_field), GFP_KERNEL);
484 if (!fields) {
485 kfree(sensor_inst->fields);
486 return -ENOMEM;
487 }
488 sensor_inst->fields = fields;
489 sensor_field = &sensor_inst->fields[sensor_inst->sensor_field_count];
490 sensor_field->attribute.usage_id = sensor_inst->hsdev->usage;
491 if (field->logical)
492 sensor_field->attribute.attrib_id = field->logical;
493 else
494 sensor_field->attribute.attrib_id = field->usage[0].hid;
495
496 sensor_field->attribute.index = index;
497 sensor_field->attribute.report_id = report->id;
498 sensor_field->attribute.units = field->unit;
499 sensor_field->attribute.unit_expo = field->unit_exponent;
500 sensor_field->attribute.size = (field->report_size / 8);
501 sensor_field->attribute.logical_minimum = field->logical_minimum;
502 sensor_field->attribute.logical_maximum = field->logical_maximum;
503
504 if (report_type == HID_FEATURE_REPORT)
505 snprintf(sensor_field->group_name,
506 sizeof(sensor_field->group_name), "feature-%x-%x",
507 sensor_field->attribute.index,
508 sensor_field->attribute.attrib_id);
509 else if (report_type == HID_INPUT_REPORT) {
510 snprintf(sensor_field->group_name,
511 sizeof(sensor_field->group_name),
512 "input-%x-%x", sensor_field->attribute.index,
513 sensor_field->attribute.attrib_id);
514 sensor_inst->input_field_count++;
515 sensor_inst->input_report_size += (field->report_size *
516 field->report_count) / 8;
517 }
518
519 memset(&sensor_field->hid_custom_attribute_group, 0,
520 sizeof(struct attribute_group));
521 sensor_inst->sensor_field_count++;
522
523 return 0;
524}
525
526static int hid_sensor_custom_add_fields(struct hid_sensor_custom *sensor_inst,
527 struct hid_report_enum *report_enum,
528 int report_type)
529{
530 int i;
531 int ret;
532 struct hid_report *report;
533 struct hid_field *field;
534 struct hid_sensor_hub_device *hsdev = sensor_inst->hsdev;
535
536 list_for_each_entry(report, &report_enum->report_list, list) {
537 for (i = 0; i < report->maxfield; ++i) {
538 field = report->field[i];
539 if (field->maxusage &&
540 ((field->usage[0].collection_index >=
541 hsdev->start_collection_index) &&
542 (field->usage[0].collection_index <
543 hsdev->end_collection_index))) {
544
545 ret = hid_sensor_custom_add_field(sensor_inst,
546 i,
547 report_type,
548 report,
549 field);
550 if (ret)
551 return ret;
552
553 }
554 }
555 }
556
557 return 0;
558}
559
560static int hid_sensor_custom_add_attributes(struct hid_sensor_custom
561 *sensor_inst)
562{
563 struct hid_sensor_hub_device *hsdev = sensor_inst->hsdev;
564 struct hid_device *hdev = hsdev->hdev;
565 int ret = -1;
566 int i, j;
567
568 for (j = 0; j < HID_REPORT_TYPES; ++j) {
569 if (j == HID_OUTPUT_REPORT)
570 continue;
571
572 ret = hid_sensor_custom_add_fields(sensor_inst,
573 &hdev->report_enum[j], j);
574 if (ret)
575 return ret;
576
577 }
578
579 /* Create sysfs attributes */
580 for (i = 0; i < sensor_inst->sensor_field_count; ++i) {
581 j = 0;
582 while (j < HID_CUSTOM_TOTAL_ATTRS &&
583 hid_custom_attrs[j].name) {
584 struct device_attribute *device_attr;
585
586 device_attr = &sensor_inst->fields[i].sd_attrs[j];
587
588 snprintf((char *)&sensor_inst->fields[i].attr_name[j],
589 HID_CUSTOM_NAME_LENGTH, "%s-%s",
590 sensor_inst->fields[i].group_name,
591 hid_custom_attrs[j].name);
592 sysfs_attr_init(&device_attr->attr);
593 device_attr->attr.name =
594 (char *)&sensor_inst->fields[i].attr_name[j];
595 device_attr->attr.mode = hid_custom_attrs[j].mode;
596 device_attr->show = show_value;
597 if (hid_custom_attrs[j].mode & S_IWUSR)
598 device_attr->store = store_value;
599 sensor_inst->fields[i].attrs[j] = &device_attr->attr;
600 ++j;
601 }
602 sensor_inst->fields[i].attrs[j] = NULL;
603 sensor_inst->fields[i].hid_custom_attribute_group.attrs =
604 sensor_inst->fields[i].attrs;
605 sensor_inst->fields[i].hid_custom_attribute_group.name =
606 sensor_inst->fields[i].group_name;
607 ret = sysfs_create_group(&sensor_inst->pdev->dev.kobj,
608 &sensor_inst->fields[i].
609 hid_custom_attribute_group);
610 if (ret)
611 break;
612
613 /* For power or report field store indexes */
614 if (sensor_inst->fields[i].attribute.attrib_id ==
615 HID_USAGE_SENSOR_PROY_POWER_STATE)
616 sensor_inst->power_state = &sensor_inst->fields[i];
617 else if (sensor_inst->fields[i].attribute.attrib_id ==
618 HID_USAGE_SENSOR_PROP_REPORT_STATE)
619 sensor_inst->report_state = &sensor_inst->fields[i];
620 }
621
622 return ret;
623}
624
625static void hid_sensor_custom_remove_attributes(struct hid_sensor_custom *
626 sensor_inst)
627{
628 int i;
629
630 for (i = 0; i < sensor_inst->sensor_field_count; ++i)
631 sysfs_remove_group(&sensor_inst->pdev->dev.kobj,
632 &sensor_inst->fields[i].
633 hid_custom_attribute_group);
634
635 kfree(sensor_inst->fields);
636}
637
638static ssize_t hid_sensor_custom_read(struct file *file, char __user *buf,
639 size_t count, loff_t *f_ps)
640{
641 struct hid_sensor_custom *sensor_inst;
642 unsigned int copied;
643 int ret;
644
645 sensor_inst = container_of(file->private_data,
646 struct hid_sensor_custom, custom_dev);
647
648 if (count < sizeof(struct hid_sensor_sample))
649 return -EINVAL;
650
651 do {
652 if (kfifo_is_empty(&sensor_inst->data_fifo)) {
653 if (file->f_flags & O_NONBLOCK)
654 return -EAGAIN;
655
656 ret = wait_event_interruptible(sensor_inst->wait,
657 !kfifo_is_empty(&sensor_inst->data_fifo));
658 if (ret)
659 return ret;
660 }
661 ret = kfifo_to_user(&sensor_inst->data_fifo, buf, count,
662 &copied);
663 if (ret)
664 return ret;
665
666 } while (copied == 0);
667
668 return copied;
669}
670
671static int hid_sensor_custom_release(struct inode *inode, struct file *file)
672{
673 struct hid_sensor_custom *sensor_inst;
674
675 sensor_inst = container_of(file->private_data,
676 struct hid_sensor_custom, custom_dev);
677
678 clear_bit(0, &sensor_inst->misc_opened);
679
680 return 0;
681}
682
683static int hid_sensor_custom_open(struct inode *inode, struct file *file)
684{
685 struct hid_sensor_custom *sensor_inst;
686
687 sensor_inst = container_of(file->private_data,
688 struct hid_sensor_custom, custom_dev);
689 /* We essentially have single reader and writer */
690 if (test_and_set_bit(0, &sensor_inst->misc_opened))
691 return -EBUSY;
692
3975b097 693 return stream_open(inode, file);
4a7de051
SP		 694}
695
afc9a42b 696static __poll_t hid_sensor_custom_poll(struct file *file,
4a7de051
SP		 697 struct poll_table_struct *wait)
698{
699 struct hid_sensor_custom *sensor_inst;
afc9a42b 700 __poll_t mask = 0;
4a7de051
SP		 701
702 sensor_inst = container_of(file->private_data,
703 struct hid_sensor_custom, custom_dev);
704
705 poll_wait(file, &sensor_inst->wait, wait);
706
707 if (!kfifo_is_empty(&sensor_inst->data_fifo))
a9a08845 708 mask = EPOLLIN | EPOLLRDNORM;
4a7de051
SP		 709
710 return mask;
711}
712
713static const struct file_operations hid_sensor_custom_fops = {
714 .open = hid_sensor_custom_open,
715 .read = hid_sensor_custom_read,
716 .release = hid_sensor_custom_release,
717 .poll = hid_sensor_custom_poll,
718 .llseek = noop_llseek,
719};
720
721static int hid_sensor_custom_dev_if_add(struct hid_sensor_custom *sensor_inst)
722{
723 int ret;
724
725 ret = kfifo_alloc(&sensor_inst->data_fifo, HID_CUSTOM_FIFO_SIZE,
726 GFP_KERNEL);
727 if (ret)
728 return ret;
729
730 init_waitqueue_head(&sensor_inst->wait);
731
732 sensor_inst->custom_dev.minor = MISC_DYNAMIC_MINOR;
733 sensor_inst->custom_dev.name = dev_name(&sensor_inst->pdev->dev);
734 sensor_inst->custom_dev.fops = &hid_sensor_custom_fops,
735 ret = misc_register(&sensor_inst->custom_dev);
736 if (ret) {
737 kfifo_free(&sensor_inst->data_fifo);
738 return ret;
739 }
740 return 0;
741}
742
743static void hid_sensor_custom_dev_if_remove(struct hid_sensor_custom
744 *sensor_inst)
745{
746 wake_up(&sensor_inst->wait);
747 misc_deregister(&sensor_inst->custom_dev);
748 kfifo_free(&sensor_inst->data_fifo);
749
750}
751
23931967
YX		 752/* luid defined in FW (e.g. ISH). Maybe used to identify sensor. */
753static const char *const known_sensor_luid[] = { "020B000000000000" };
754
755static int get_luid_table_index(unsigned char *usage_str)
756{
757 int i;
758
759 for (i = 0; i < ARRAY_SIZE(known_sensor_luid); i++) {
760 if (!strncmp(usage_str, known_sensor_luid[i],
761 strlen(known_sensor_luid[i])))
762 return i;
763 }
764
765 return -ENODEV;
766}
767
768static int get_known_custom_sensor_index(struct hid_sensor_hub_device *hsdev)
769{
770 struct hid_sensor_hub_attribute_info sensor_manufacturer = { 0 };
771 struct hid_sensor_hub_attribute_info sensor_luid_info = { 0 };
772 int report_size;
773 int ret;
774 static u16 w_buf[HID_CUSTOM_MAX_FEATURE_BYTES];
775 static char buf[HID_CUSTOM_MAX_FEATURE_BYTES];
776 int i;
777
778 memset(w_buf, 0, sizeof(w_buf));
779 memset(buf, 0, sizeof(buf));
780
781 /* get manufacturer info */
782 ret = sensor_hub_input_get_attribute_info(hsdev,
783 HID_FEATURE_REPORT, hsdev->usage,
784 HID_USAGE_SENSOR_PROP_MANUFACTURER, &sensor_manufacturer);
785 if (ret < 0)
786 return ret;
787
788 report_size =
789 sensor_hub_get_feature(hsdev, sensor_manufacturer.report_id,
790 sensor_manufacturer.index, sizeof(w_buf),
791 w_buf);
792 if (report_size <= 0) {
793 hid_err(hsdev->hdev,
794 "Failed to get sensor manufacturer info %d\n",
795 report_size);
796 return -ENODEV;
797 }
798
799 /* convert from wide char to char */
800 for (i = 0; i < ARRAY_SIZE(buf) - 1 && w_buf[i]; i++)
801 buf[i] = (char)w_buf[i];
802
803 /* ensure it's ISH sensor */
804 if (strncmp(buf, "INTEL", strlen("INTEL")))
805 return -ENODEV;
806
807 memset(w_buf, 0, sizeof(w_buf));
808 memset(buf, 0, sizeof(buf));
809
810 /* get real usage id */
811 ret = sensor_hub_input_get_attribute_info(hsdev,
812 HID_FEATURE_REPORT, hsdev->usage,
813 HID_USAGE_SENSOR_PROP_SERIAL_NUM, &sensor_luid_info);
814 if (ret < 0)
815 return ret;
816
817 report_size = sensor_hub_get_feature(hsdev, sensor_luid_info.report_id,
818 sensor_luid_info.index, sizeof(w_buf),
819 w_buf);
820 if (report_size <= 0) {
821 hid_err(hsdev->hdev, "Failed to get real usage info %d\n",
822 report_size);
823 return -ENODEV;
824 }
825
826 /* convert from wide char to char */
827 for (i = 0; i < ARRAY_SIZE(buf) - 1 && w_buf[i]; i++)
828 buf[i] = (char)w_buf[i];
829
830 if (strlen(buf) != strlen(known_sensor_luid[0]) + 5) {
831 hid_err(hsdev->hdev,
832 "%s luid length not match %zu != (%zu + 5)\n", __func__,
833 strlen(buf), strlen(known_sensor_luid[0]));
834 return -ENODEV;
835 }
836
837 /* get table index with luid (not matching 'LUID: ' in luid) */
838 return get_luid_table_index(&buf[5]);
839}
840
841static struct platform_device *
842hid_sensor_register_platform_device(struct platform_device *pdev,
843 struct hid_sensor_hub_device *hsdev,
844 int index)
845{
846 char real_usage[HID_SENSOR_USAGE_LENGTH] = { 0 };
847 struct platform_device *custom_pdev;
848 const char *dev_name;
849 char *c;
850
851 /* copy real usage id */
852 memcpy(real_usage, known_sensor_luid[index], 4);
853
854 /* usage id are all lowcase */
855 for (c = real_usage; *c != '\0'; c++)
856 *c = tolower(*c);
857
858 /* HID-SENSOR-INT-REAL_USAGE_ID */
859 dev_name = kasprintf(GFP_KERNEL, "HID-SENSOR-INT-%s", real_usage);
860 if (!dev_name)
861 return ERR_PTR(-ENOMEM);
862
863 custom_pdev = platform_device_register_data(pdev->dev.parent, dev_name,
864 PLATFORM_DEVID_NONE, hsdev,
865 sizeof(*hsdev));
866 kfree(dev_name);
867 return custom_pdev;
868}
869
4a7de051
SP		 870static int hid_sensor_custom_probe(struct platform_device *pdev)
871{
872 struct hid_sensor_custom *sensor_inst;
873 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
874 int ret;
23931967 875 int index;
4a7de051
SP		 876
877 sensor_inst = devm_kzalloc(&pdev->dev, sizeof(*sensor_inst),
878 GFP_KERNEL);
879 if (!sensor_inst)
880 return -ENOMEM;
881
882 sensor_inst->callbacks.capture_sample = hid_sensor_capture_sample;
883 sensor_inst->callbacks.send_event = hid_sensor_send_event;
884 sensor_inst->callbacks.pdev = pdev;
885 sensor_inst->hsdev = hsdev;
886 sensor_inst->pdev = pdev;
887 mutex_init(&sensor_inst->mutex);
888 platform_set_drvdata(pdev, sensor_inst);
23931967
YX		 889
890 index = get_known_custom_sensor_index(hsdev);
891 if (index >= 0 && index < ARRAY_SIZE(known_sensor_luid)) {
892 sensor_inst->custom_pdev =
893 hid_sensor_register_platform_device(pdev, hsdev, index);
894
895 ret = PTR_ERR_OR_ZERO(sensor_inst->custom_pdev);
896 if (ret) {
897 dev_err(&pdev->dev,
898 "register_platform_device failed\n");
899 return ret;
900 }
901
902 return 0;
903 }
904
4a7de051
SP		 905 ret = sensor_hub_register_callback(hsdev, hsdev->usage,
906 &sensor_inst->callbacks);
907 if (ret < 0) {
908 dev_err(&pdev->dev, "callback reg failed\n");
909 return ret;
910 }
911
912 ret = sysfs_create_group(&sensor_inst->pdev->dev.kobj,
913 &enable_sensor_attr_group);
914 if (ret)
915 goto err_remove_callback;
916
917 ret = hid_sensor_custom_add_attributes(sensor_inst);
918 if (ret)
919 goto err_remove_group;
920
921 ret = hid_sensor_custom_dev_if_add(sensor_inst);
922 if (ret)
923 goto err_remove_attributes;
924
925 return 0;
926
927err_remove_attributes:
928 hid_sensor_custom_remove_attributes(sensor_inst);
929err_remove_group:
930 sysfs_remove_group(&sensor_inst->pdev->dev.kobj,
931 &enable_sensor_attr_group);
932err_remove_callback:
933 sensor_hub_remove_callback(hsdev, hsdev->usage);
934
935 return ret;
936}
937
938static int hid_sensor_custom_remove(struct platform_device *pdev)
939{
940 struct hid_sensor_custom *sensor_inst = platform_get_drvdata(pdev);
941 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
942
23931967
YX		 943 if (sensor_inst->custom_pdev) {
944 platform_device_unregister(sensor_inst->custom_pdev);
945 return 0;
946 }
947
4a7de051
SP		 948 hid_sensor_custom_dev_if_remove(sensor_inst);
949 hid_sensor_custom_remove_attributes(sensor_inst);
950 sysfs_remove_group(&sensor_inst->pdev->dev.kobj,
951 &enable_sensor_attr_group);
952 sensor_hub_remove_callback(hsdev, hsdev->usage);
953
954 return 0;
955}
956
0be2bfdc 957static const struct platform_device_id hid_sensor_custom_ids[] = {
4a7de051
SP		 958 {
959 .name = "HID-SENSOR-2000e1",
960 },
961 {
962 .name = "HID-SENSOR-2000e2",
963 },
964 { /* sentinel */ }
965};
966MODULE_DEVICE_TABLE(platform, hid_sensor_custom_ids);
967
968static struct platform_driver hid_sensor_custom_platform_driver = {
969 .id_table = hid_sensor_custom_ids,
970 .driver = {
971 .name = KBUILD_MODNAME,
972 },
973 .probe = hid_sensor_custom_probe,
974 .remove = hid_sensor_custom_remove,
975};
976module_platform_driver(hid_sensor_custom_platform_driver);
977
978MODULE_DESCRIPTION("HID Sensor Custom and Generic sensor Driver");
979MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
980MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)