1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright (c) 2015, Intel Corporation.
7 #include <linux/ctype.h>
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>
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
25 #define HID_SENSOR_USAGE_LENGTH (4 + 1)
27 struct hid_sensor_custom_field {
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;
37 struct hid_sensor_custom {
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;
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;
55 struct platform_device *custom_pdev;
58 /* Header for each sample to user space via dev interface */
59 struct hid_sensor_sample {
65 static 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},
76 static const struct hid_custom_usage_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"},
141 static int usage_id_cmp(const void *p1, const void *p2)
143 if (*(int *)p1 < *(int *)p2)
146 if (*(int *)p1 > *(int *)p2)
152 static ssize_t enable_sensor_show(struct device *dev,
153 struct device_attribute *attr, char *buf)
155 struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
157 return sprintf(buf, "%d\n", sensor_inst->enable);
160 static int set_power_report_state(struct hid_sensor_custom *sensor_inst,
165 u32 power_state_usage_id;
166 u32 report_state_usage_id;
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.
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;
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;
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);
197 if (power_val >= 0) {
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,
206 hid_err(sensor_inst->hsdev->hdev,
207 "Set power state failed\n");
212 if (report_val >= 0) {
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,
221 hid_err(sensor_inst->hsdev->hdev,
222 "Set report state failed\n");
230 static ssize_t enable_sensor_store(struct device *dev,
231 struct device_attribute *attr,
232 const char *buf, size_t count)
234 struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
238 if (kstrtoint(buf, 0, &value) != 0)
241 mutex_lock(&sensor_inst->mutex);
242 if (value && !sensor_inst->enable) {
243 ret = sensor_hub_device_open(sensor_inst->hsdev);
247 ret = set_power_report_state(sensor_inst, true);
249 sensor_hub_device_close(sensor_inst->hsdev);
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;
259 mutex_unlock(&sensor_inst->mutex);
265 static DEVICE_ATTR_RW(enable_sensor);
267 static struct attribute *enable_sensor_attrs[] = {
268 &dev_attr_enable_sensor.attr,
272 static const struct attribute_group enable_sensor_attr_group = {
273 .attrs = enable_sensor_attrs,
276 static ssize_t show_value(struct device *dev, struct device_attribute *attr,
279 struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
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;
287 if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage,
290 field_index = index + sensor_inst->input_field_count;
291 } else if (sscanf(attr->attr.name, "input-%x-%x-%s", &index, &usage,
298 if (!strncmp(name, "value", strlen("value"))) {
302 attribute = &sensor_inst->fields[field_index].attribute;
303 report_id = attribute->report_id;
305 u8 values[HID_CUSTOM_MAX_FEATURE_BYTES];
310 ret = sensor_hub_get_feature(sensor_inst->hsdev,
313 sizeof(values), values);
318 if (i + attribute->size > ret) {
319 len += scnprintf(&buf[len],
324 switch (attribute->size) {
326 value = (u64) *(u16 *)&values[i];
327 i += attribute->size;
330 value = (u64) *(u32 *)&values[i];
331 i += attribute->size;
334 value = *(u64 *)&values[i];
335 i += attribute->size;
338 value = (u64) values[i];
342 len += scnprintf(&buf[len], PAGE_SIZE - len,
345 len += scnprintf(&buf[len], PAGE_SIZE - len, "\n");
349 value = sensor_hub_input_attr_get_raw_value(
351 sensor_inst->hsdev->usage,
353 SENSOR_HUB_SYNC, false);
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.
363 else if (!strncmp(name, "maximum", strlen("maximum")))
364 value = sensor_inst->fields[field_index].attribute.
366 else if (!strncmp(name, "name", strlen("name"))) {
367 struct hid_custom_usage_desc *usage_desc;
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),
374 return snprintf(buf, PAGE_SIZE, "%s\n",
377 return sprintf(buf, "not-specified\n");
381 return sprintf(buf, "%d\n", value);
384 static ssize_t store_value(struct device *dev, struct device_attribute *attr,
385 const char *buf, size_t count)
387 struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
388 int index, field_index, usage;
389 char name[HID_CUSTOM_NAME_LENGTH];
392 if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage,
394 field_index = index + sensor_inst->input_field_count;
398 if (!strncmp(name, "value", strlen("value"))) {
401 if (kstrtoint(buf, 0, &value) != 0)
404 report_id = sensor_inst->fields[field_index].attribute.
406 sensor_hub_set_feature(sensor_inst->hsdev, report_id,
407 index, sizeof(value), &value);
414 static int hid_sensor_capture_sample(struct hid_sensor_hub_device *hsdev,
415 unsigned usage_id, size_t raw_len,
416 char *raw_data, void *priv)
418 struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv);
419 struct hid_sensor_sample header;
421 /* If any error occurs in a sample, rest of the fields are ignored */
422 if (sensor_inst->input_skip_sample) {
423 hid_err(sensor_inst->hsdev->hdev, "Skipped remaining data\n");
427 hid_dbg(sensor_inst->hsdev->hdev, "%s received %d of %d\n", __func__,
428 (int) (sensor_inst->input_report_recd_size + raw_len),
429 sensor_inst->input_report_size);
431 if (!test_bit(0, &sensor_inst->misc_opened))
434 if (!sensor_inst->input_report_recd_size) {
435 int required_size = sizeof(struct hid_sensor_sample) +
436 sensor_inst->input_report_size;
437 header.usage_id = hsdev->usage;
438 header.raw_len = sensor_inst->input_report_size;
439 header.timestamp = ktime_get_real_ns();
440 if (kfifo_avail(&sensor_inst->data_fifo) >= required_size) {
441 kfifo_in(&sensor_inst->data_fifo,
442 (unsigned char *)&header,
445 sensor_inst->input_skip_sample = true;
447 if (kfifo_avail(&sensor_inst->data_fifo) >= raw_len)
448 kfifo_in(&sensor_inst->data_fifo, (unsigned char *)raw_data,
451 sensor_inst->input_report_recd_size += raw_len;
456 static int hid_sensor_send_event(struct hid_sensor_hub_device *hsdev,
457 unsigned usage_id, void *priv)
459 struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv);
461 if (!test_bit(0, &sensor_inst->misc_opened))
464 sensor_inst->input_report_recd_size = 0;
465 sensor_inst->input_skip_sample = false;
467 wake_up(&sensor_inst->wait);
472 static int hid_sensor_custom_add_field(struct hid_sensor_custom *sensor_inst,
473 int index, int report_type,
474 struct hid_report *report,
475 struct hid_field *field)
477 struct hid_sensor_custom_field *sensor_field;
480 fields = krealloc(sensor_inst->fields,
481 (sensor_inst->sensor_field_count + 1) *
482 sizeof(struct hid_sensor_custom_field), GFP_KERNEL);
484 kfree(sensor_inst->fields);
487 sensor_inst->fields = fields;
488 sensor_field = &sensor_inst->fields[sensor_inst->sensor_field_count];
489 sensor_field->attribute.usage_id = sensor_inst->hsdev->usage;
491 sensor_field->attribute.attrib_id = field->logical;
493 sensor_field->attribute.attrib_id = field->usage[0].hid;
495 sensor_field->attribute.index = index;
496 sensor_field->attribute.report_id = report->id;
497 sensor_field->attribute.units = field->unit;
498 sensor_field->attribute.unit_expo = field->unit_exponent;
499 sensor_field->attribute.size = (field->report_size / 8);
500 sensor_field->attribute.logical_minimum = field->logical_minimum;
501 sensor_field->attribute.logical_maximum = field->logical_maximum;
503 if (report_type == HID_FEATURE_REPORT)
504 snprintf(sensor_field->group_name,
505 sizeof(sensor_field->group_name), "feature-%x-%x",
506 sensor_field->attribute.index,
507 sensor_field->attribute.attrib_id);
508 else if (report_type == HID_INPUT_REPORT) {
509 snprintf(sensor_field->group_name,
510 sizeof(sensor_field->group_name),
511 "input-%x-%x", sensor_field->attribute.index,
512 sensor_field->attribute.attrib_id);
513 sensor_inst->input_field_count++;
514 sensor_inst->input_report_size += (field->report_size *
515 field->report_count) / 8;
518 memset(&sensor_field->hid_custom_attribute_group, 0,
519 sizeof(struct attribute_group));
520 sensor_inst->sensor_field_count++;
525 static int hid_sensor_custom_add_fields(struct hid_sensor_custom *sensor_inst,
526 struct hid_report_enum *report_enum,
531 struct hid_report *report;
532 struct hid_field *field;
533 struct hid_sensor_hub_device *hsdev = sensor_inst->hsdev;
535 list_for_each_entry(report, &report_enum->report_list, list) {
536 for (i = 0; i < report->maxfield; ++i) {
537 field = report->field[i];
538 if (field->maxusage &&
539 ((field->usage[0].collection_index >=
540 hsdev->start_collection_index) &&
541 (field->usage[0].collection_index <
542 hsdev->end_collection_index))) {
544 ret = hid_sensor_custom_add_field(sensor_inst,
559 static int hid_sensor_custom_add_attributes(struct hid_sensor_custom
562 struct hid_sensor_hub_device *hsdev = sensor_inst->hsdev;
563 struct hid_device *hdev = hsdev->hdev;
567 for (j = 0; j < HID_REPORT_TYPES; ++j) {
568 if (j == HID_OUTPUT_REPORT)
571 ret = hid_sensor_custom_add_fields(sensor_inst,
572 &hdev->report_enum[j], j);
578 /* Create sysfs attributes */
579 for (i = 0; i < sensor_inst->sensor_field_count; ++i) {
581 while (j < HID_CUSTOM_TOTAL_ATTRS &&
582 hid_custom_attrs[j].name) {
583 struct device_attribute *device_attr;
585 device_attr = &sensor_inst->fields[i].sd_attrs[j];
587 snprintf((char *)&sensor_inst->fields[i].attr_name[j],
588 HID_CUSTOM_NAME_LENGTH, "%s-%s",
589 sensor_inst->fields[i].group_name,
590 hid_custom_attrs[j].name);
591 sysfs_attr_init(&device_attr->attr);
592 device_attr->attr.name =
593 (char *)&sensor_inst->fields[i].attr_name[j];
594 device_attr->attr.mode = hid_custom_attrs[j].mode;
595 device_attr->show = show_value;
596 if (hid_custom_attrs[j].mode & S_IWUSR)
597 device_attr->store = store_value;
598 sensor_inst->fields[i].attrs[j] = &device_attr->attr;
601 sensor_inst->fields[i].attrs[j] = NULL;
602 sensor_inst->fields[i].hid_custom_attribute_group.attrs =
603 sensor_inst->fields[i].attrs;
604 sensor_inst->fields[i].hid_custom_attribute_group.name =
605 sensor_inst->fields[i].group_name;
606 ret = sysfs_create_group(&sensor_inst->pdev->dev.kobj,
607 &sensor_inst->fields[i].
608 hid_custom_attribute_group);
612 /* For power or report field store indexes */
613 if (sensor_inst->fields[i].attribute.attrib_id ==
614 HID_USAGE_SENSOR_PROY_POWER_STATE)
615 sensor_inst->power_state = &sensor_inst->fields[i];
616 else if (sensor_inst->fields[i].attribute.attrib_id ==
617 HID_USAGE_SENSOR_PROP_REPORT_STATE)
618 sensor_inst->report_state = &sensor_inst->fields[i];
624 static void hid_sensor_custom_remove_attributes(struct hid_sensor_custom *
629 for (i = 0; i < sensor_inst->sensor_field_count; ++i)
630 sysfs_remove_group(&sensor_inst->pdev->dev.kobj,
631 &sensor_inst->fields[i].
632 hid_custom_attribute_group);
634 kfree(sensor_inst->fields);
637 static ssize_t hid_sensor_custom_read(struct file *file, char __user *buf,
638 size_t count, loff_t *f_ps)
640 struct hid_sensor_custom *sensor_inst;
644 sensor_inst = container_of(file->private_data,
645 struct hid_sensor_custom, custom_dev);
647 if (count < sizeof(struct hid_sensor_sample))
651 if (kfifo_is_empty(&sensor_inst->data_fifo)) {
652 if (file->f_flags & O_NONBLOCK)
655 ret = wait_event_interruptible(sensor_inst->wait,
656 !kfifo_is_empty(&sensor_inst->data_fifo));
660 ret = kfifo_to_user(&sensor_inst->data_fifo, buf, count,
665 } while (copied == 0);
670 static int hid_sensor_custom_release(struct inode *inode, struct file *file)
672 struct hid_sensor_custom *sensor_inst;
674 sensor_inst = container_of(file->private_data,
675 struct hid_sensor_custom, custom_dev);
677 clear_bit(0, &sensor_inst->misc_opened);
682 static int hid_sensor_custom_open(struct inode *inode, struct file *file)
684 struct hid_sensor_custom *sensor_inst;
686 sensor_inst = container_of(file->private_data,
687 struct hid_sensor_custom, custom_dev);
688 /* We essentially have single reader and writer */
689 if (test_and_set_bit(0, &sensor_inst->misc_opened))
692 return stream_open(inode, file);
695 static __poll_t hid_sensor_custom_poll(struct file *file,
696 struct poll_table_struct *wait)
698 struct hid_sensor_custom *sensor_inst;
701 sensor_inst = container_of(file->private_data,
702 struct hid_sensor_custom, custom_dev);
704 poll_wait(file, &sensor_inst->wait, wait);
706 if (!kfifo_is_empty(&sensor_inst->data_fifo))
707 mask = EPOLLIN | EPOLLRDNORM;
712 static const struct file_operations hid_sensor_custom_fops = {
713 .open = hid_sensor_custom_open,
714 .read = hid_sensor_custom_read,
715 .release = hid_sensor_custom_release,
716 .poll = hid_sensor_custom_poll,
717 .llseek = noop_llseek,
720 static int hid_sensor_custom_dev_if_add(struct hid_sensor_custom *sensor_inst)
724 ret = kfifo_alloc(&sensor_inst->data_fifo, HID_CUSTOM_FIFO_SIZE,
729 init_waitqueue_head(&sensor_inst->wait);
731 sensor_inst->custom_dev.minor = MISC_DYNAMIC_MINOR;
732 sensor_inst->custom_dev.name = dev_name(&sensor_inst->pdev->dev);
733 sensor_inst->custom_dev.fops = &hid_sensor_custom_fops,
734 ret = misc_register(&sensor_inst->custom_dev);
736 kfifo_free(&sensor_inst->data_fifo);
742 static void hid_sensor_custom_dev_if_remove(struct hid_sensor_custom
745 wake_up(&sensor_inst->wait);
746 misc_deregister(&sensor_inst->custom_dev);
747 kfifo_free(&sensor_inst->data_fifo);
751 /* luid defined in FW (e.g. ISH). Maybe used to identify sensor. */
752 static const char *const known_sensor_luid[] = { "020B000000000000" };
754 static int get_luid_table_index(unsigned char *usage_str)
758 for (i = 0; i < ARRAY_SIZE(known_sensor_luid); i++) {
759 if (!strncmp(usage_str, known_sensor_luid[i],
760 strlen(known_sensor_luid[i])))
767 static int get_known_custom_sensor_index(struct hid_sensor_hub_device *hsdev)
769 struct hid_sensor_hub_attribute_info sensor_manufacturer = { 0 };
770 struct hid_sensor_hub_attribute_info sensor_luid_info = { 0 };
773 static u16 w_buf[HID_CUSTOM_MAX_FEATURE_BYTES];
774 static char buf[HID_CUSTOM_MAX_FEATURE_BYTES];
777 memset(w_buf, 0, sizeof(w_buf));
778 memset(buf, 0, sizeof(buf));
780 /* get manufacturer info */
781 ret = sensor_hub_input_get_attribute_info(hsdev,
782 HID_FEATURE_REPORT, hsdev->usage,
783 HID_USAGE_SENSOR_PROP_MANUFACTURER, &sensor_manufacturer);
788 sensor_hub_get_feature(hsdev, sensor_manufacturer.report_id,
789 sensor_manufacturer.index, sizeof(w_buf),
791 if (report_size <= 0) {
793 "Failed to get sensor manufacturer info %d\n",
798 /* convert from wide char to char */
799 for (i = 0; i < ARRAY_SIZE(buf) - 1 && w_buf[i]; i++)
800 buf[i] = (char)w_buf[i];
802 /* ensure it's ISH sensor */
803 if (strncmp(buf, "INTEL", strlen("INTEL")))
806 memset(w_buf, 0, sizeof(w_buf));
807 memset(buf, 0, sizeof(buf));
809 /* get real usage id */
810 ret = sensor_hub_input_get_attribute_info(hsdev,
811 HID_FEATURE_REPORT, hsdev->usage,
812 HID_USAGE_SENSOR_PROP_SERIAL_NUM, &sensor_luid_info);
816 report_size = sensor_hub_get_feature(hsdev, sensor_luid_info.report_id,
817 sensor_luid_info.index, sizeof(w_buf),
819 if (report_size <= 0) {
820 hid_err(hsdev->hdev, "Failed to get real usage info %d\n",
825 /* convert from wide char to char */
826 for (i = 0; i < ARRAY_SIZE(buf) - 1 && w_buf[i]; i++)
827 buf[i] = (char)w_buf[i];
829 if (strlen(buf) != strlen(known_sensor_luid[0]) + 5) {
831 "%s luid length not match %zu != (%zu + 5)\n", __func__,
832 strlen(buf), strlen(known_sensor_luid[0]));
836 /* get table index with luid (not matching 'LUID: ' in luid) */
837 return get_luid_table_index(&buf[5]);
840 static struct platform_device *
841 hid_sensor_register_platform_device(struct platform_device *pdev,
842 struct hid_sensor_hub_device *hsdev,
845 char real_usage[HID_SENSOR_USAGE_LENGTH] = { 0 };
846 struct platform_device *custom_pdev;
847 const char *dev_name;
850 /* copy real usage id */
851 memcpy(real_usage, known_sensor_luid[index], 4);
853 /* usage id are all lowcase */
854 for (c = real_usage; *c != '\0'; c++)
857 /* HID-SENSOR-INT-REAL_USAGE_ID */
858 dev_name = kasprintf(GFP_KERNEL, "HID-SENSOR-INT-%s", real_usage);
860 return ERR_PTR(-ENOMEM);
862 custom_pdev = platform_device_register_data(pdev->dev.parent, dev_name,
863 PLATFORM_DEVID_NONE, hsdev,
869 static int hid_sensor_custom_probe(struct platform_device *pdev)
871 struct hid_sensor_custom *sensor_inst;
872 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
876 sensor_inst = devm_kzalloc(&pdev->dev, sizeof(*sensor_inst),
881 sensor_inst->callbacks.capture_sample = hid_sensor_capture_sample;
882 sensor_inst->callbacks.send_event = hid_sensor_send_event;
883 sensor_inst->callbacks.pdev = pdev;
884 sensor_inst->hsdev = hsdev;
885 sensor_inst->pdev = pdev;
886 mutex_init(&sensor_inst->mutex);
887 platform_set_drvdata(pdev, sensor_inst);
889 index = get_known_custom_sensor_index(hsdev);
890 if (index >= 0 && index < ARRAY_SIZE(known_sensor_luid)) {
891 sensor_inst->custom_pdev =
892 hid_sensor_register_platform_device(pdev, hsdev, index);
894 ret = PTR_ERR_OR_ZERO(sensor_inst->custom_pdev);
897 "register_platform_device failed\n");
904 ret = sensor_hub_register_callback(hsdev, hsdev->usage,
905 &sensor_inst->callbacks);
907 dev_err(&pdev->dev, "callback reg failed\n");
911 ret = sysfs_create_group(&sensor_inst->pdev->dev.kobj,
912 &enable_sensor_attr_group);
914 goto err_remove_callback;
916 ret = hid_sensor_custom_add_attributes(sensor_inst);
918 goto err_remove_group;
920 ret = hid_sensor_custom_dev_if_add(sensor_inst);
922 goto err_remove_attributes;
926 err_remove_attributes:
927 hid_sensor_custom_remove_attributes(sensor_inst);
929 sysfs_remove_group(&sensor_inst->pdev->dev.kobj,
930 &enable_sensor_attr_group);
932 sensor_hub_remove_callback(hsdev, hsdev->usage);
937 static int hid_sensor_custom_remove(struct platform_device *pdev)
939 struct hid_sensor_custom *sensor_inst = platform_get_drvdata(pdev);
940 struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
942 if (sensor_inst->custom_pdev) {
943 platform_device_unregister(sensor_inst->custom_pdev);
947 hid_sensor_custom_dev_if_remove(sensor_inst);
948 hid_sensor_custom_remove_attributes(sensor_inst);
949 sysfs_remove_group(&sensor_inst->pdev->dev.kobj,
950 &enable_sensor_attr_group);
951 sensor_hub_remove_callback(hsdev, hsdev->usage);
956 static const struct platform_device_id hid_sensor_custom_ids[] = {
958 .name = "HID-SENSOR-2000e1",
961 .name = "HID-SENSOR-2000e2",
965 MODULE_DEVICE_TABLE(platform, hid_sensor_custom_ids);
967 static struct platform_driver hid_sensor_custom_platform_driver = {
968 .id_table = hid_sensor_custom_ids,
970 .name = KBUILD_MODNAME,
972 .probe = hid_sensor_custom_probe,
973 .remove = hid_sensor_custom_remove,
975 module_platform_driver(hid_sensor_custom_platform_driver);
977 MODULE_DESCRIPTION("HID Sensor Custom and Generic sensor Driver");
978 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
979 MODULE_LICENSE("GPL");