// SPDX-License-Identifier: GPL-2.0-only/* * hid-sensor-custom.c * Copyright (c) 2015, Intel Corporation. */ #include <linux/ctype.h>#include <linux/dmi.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/init.h>#include <linux/miscdevice.h>#include <linux/kfifo.h>#include <linux/sched.h>#include <linux/wait.h>#include <linux/poll.h>#include <linux/bsearch.h>#include <linux/platform_device.h>#include <linux/hid-sensor-hub.h> #define HID_CUSTOM_NAME_LENGTH 64#define HID_CUSTOM_MAX_CORE_ATTRS 10#define HID_CUSTOM_TOTAL_ATTRS (HID_CUSTOM_MAX_CORE_ATTRS + 1)#define HID_CUSTOM_FIFO_SIZE 4096#define HID_CUSTOM_MAX_FEATURE_BYTES 64#define HID_SENSOR_USAGE_LENGTH (4 + 1) struct hid_sensor_custom_field { int report_id; char group_name[HID_CUSTOM_NAME_LENGTH]; struct hid_sensor_hub_attribute_info attribute; struct device_attribute sd_attrs[HID_CUSTOM_MAX_CORE_ATTRS]; char attr_name[HID_CUSTOM_TOTAL_ATTRS][HID_CUSTOM_NAME_LENGTH]; struct attribute *attrs[HID_CUSTOM_TOTAL_ATTRS]; struct attribute_group hid_custom_attribute_group;}; struct hid_sensor_custom { struct mutex mutex; struct platform_device *pdev; struct hid_sensor_hub_device *hsdev; struct hid_sensor_hub_callbacks callbacks; int sensor_field_count; struct hid_sensor_custom_field *fields; int input_field_count; int input_report_size; int input_report_recd_size; bool input_skip_sample; bool enable; struct hid_sensor_custom_field *power_state; struct hid_sensor_custom_field *report_state; struct miscdevice custom_dev; struct kfifo data_fifo; unsigned long misc_opened; wait_queue_head_t wait; struct platform_device *custom_pdev;}; /* Header for each sample to user space via dev interface */struct hid_sensor_sample { u32 usage_id; u64 timestamp; u32 raw_len;} __packed; static struct attribute hid_custom_attrs[HID_CUSTOM_TOTAL_ATTRS] = { {.name = "name", .mode = S_IRUGO}, {.name = "units", .mode = S_IRUGO}, {.name = "unit-expo", .mode = S_IRUGO}, {.name = "minimum", .mode = S_IRUGO}, {.name = "maximum", .mode = S_IRUGO}, {.name = "size", .mode = S_IRUGO}, {.name = "value", .mode = S_IWUSR | S_IRUGO}, {.name = NULL}}; static const struct hid_custom_usage_desc { int usage_id; char *desc;} hid_custom_usage_desc_table[] = { {0x200201, "event-sensor-state"}, {0x200202, "event-sensor-event"}, {0x200301, "property-friendly-name"}, {0x200302, "property-persistent-unique-id"}, {0x200303, "property-sensor-status"}, {0x200304, "property-min-report-interval"}, {0x200305, "property-sensor-manufacturer"}, {0x200306, "property-sensor-model"}, {0x200307, "property-sensor-serial-number"}, {0x200308, "property-sensor-description"}, {0x200309, "property-sensor-connection-type"}, {0x20030A, "property-sensor-device-path"}, {0x20030B, "property-hardware-revision"}, {0x20030C, "property-firmware-version"}, {0x20030D, "property-release-date"}, {0x20030E, "property-report-interval"}, {0x20030F, "property-change-sensitivity-absolute"}, {0x200310, "property-change-sensitivity-percent-range"}, {0x200311, "property-change-sensitivity-percent-relative"}, {0x200312, "property-accuracy"}, {0x200313, "property-resolution"}, {0x200314, "property-maximum"}, {0x200315, "property-minimum"}, {0x200316, "property-reporting-state"}, {0x200317, "property-sampling-rate"}, {0x200318, "property-response-curve"}, {0x200319, "property-power-state"}, {0x200540, "data-field-custom"}, {0x200541, "data-field-custom-usage"}, {0x200542, "data-field-custom-boolean-array"}, {0x200543, "data-field-custom-value"}, {0x200544, "data-field-custom-value_1"}, {0x200545, "data-field-custom-value_2"}, {0x200546, "data-field-custom-value_3"}, {0x200547, "data-field-custom-value_4"}, {0x200548, "data-field-custom-value_5"}, {0x200549, "data-field-custom-value_6"}, {0x20054A, "data-field-custom-value_7"}, {0x20054B, "data-field-custom-value_8"}, {0x20054C, "data-field-custom-value_9"}, {0x20054D, "data-field-custom-value_10"}, {0x20054E, "data-field-custom-value_11"}, {0x20054F, "data-field-custom-value_12"}, {0x200550, "data-field-custom-value_13"}, {0x200551, "data-field-custom-value_14"}, {0x200552, "data-field-custom-value_15"}, {0x200553, "data-field-custom-value_16"}, {0x200554, "data-field-custom-value_17"}, {0x200555, "data-field-custom-value_18"}, {0x200556, "data-field-custom-value_19"}, {0x200557, "data-field-custom-value_20"}, {0x200558, "data-field-custom-value_21"}, {0x200559, "data-field-custom-value_22"}, {0x20055A, "data-field-custom-value_23"}, {0x20055B, "data-field-custom-value_24"}, {0x20055C, "data-field-custom-value_25"}, {0x20055D, "data-field-custom-value_26"}, {0x20055E, "data-field-custom-value_27"}, {0x20055F, "data-field-custom-value_28"},}; static int usage_id_cmp(const void *p1, const void *p2){ if (*(int *)p1 < *(int *)p2) return -1; if (*(int *)p1 > *(int *)p2) return 1; return 0;} static ssize_t enable_sensor_show(struct device *dev, struct device_attribute *attr, char *buf){ struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); return sysfs_emit(buf, "%d\n", sensor_inst->enable);} static int set_power_report_state(struct hid_sensor_custom *sensor_inst, bool state){ int power_val = -1; int report_val = -1; u32 power_state_usage_id; u32 report_state_usage_id; int ret; /* * It is possible that the power/report state ids are not present. * In this case this function will return success. But if the * ids are present, then it will return error if set fails. */ if (state) { power_state_usage_id = HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM; report_state_usage_id = HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM; } else { power_state_usage_id = HID_USAGE_SENSOR_PROP_POWER_STATE_D4_POWER_OFF_ENUM; report_state_usage_id = HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM; } if (sensor_inst->power_state) power_val = hid_sensor_get_usage_index(sensor_inst->hsdev, sensor_inst->power_state->attribute.report_id, sensor_inst->power_state->attribute.index, power_state_usage_id); if (sensor_inst->report_state) report_val = hid_sensor_get_usage_index(sensor_inst->hsdev, sensor_inst->report_state->attribute.report_id, sensor_inst->report_state->attribute.index, report_state_usage_id); if (power_val >= 0) { power_val += sensor_inst->power_state->attribute.logical_minimum; ret = sensor_hub_set_feature(sensor_inst->hsdev, sensor_inst->power_state->attribute.report_id, sensor_inst->power_state->attribute.index, sizeof(power_val), &power_val); if (ret) { hid_err(sensor_inst->hsdev->hdev, "Set power state failed\n"); return ret; } } if (report_val >= 0) { report_val += sensor_inst->report_state->attribute.logical_minimum; ret = sensor_hub_set_feature(sensor_inst->hsdev, sensor_inst->report_state->attribute.report_id, sensor_inst->report_state->attribute.index, sizeof(report_val), &report_val); if (ret) { hid_err(sensor_inst->hsdev->hdev, "Set report state failed\n"); return ret; } } return 0;} static ssize_t enable_sensor_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count){ struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); int value; int ret = -EINVAL; if (kstrtoint(buf, 0, &value) != 0) return -EINVAL; mutex_lock(&sensor_inst->mutex); if (value && !sensor_inst->enable) { ret = sensor_hub_device_open(sensor_inst->hsdev); if (ret) goto unlock_state; ret = set_power_report_state(sensor_inst, true); if (ret) { sensor_hub_device_close(sensor_inst->hsdev); goto unlock_state; } sensor_inst->enable = true; } else if (!value && sensor_inst->enable) { ret = set_power_report_state(sensor_inst, false); sensor_hub_device_close(sensor_inst->hsdev); sensor_inst->enable = false; }unlock_state: mutex_unlock(&sensor_inst->mutex); if (ret < 0) return ret; return count;}static DEVICE_ATTR_RW(enable_sensor); static struct attribute *enable_sensor_attrs[] = { &dev_attr_enable_sensor.attr, NULL,}; static const struct attribute_group enable_sensor_attr_group = { .attrs = enable_sensor_attrs,}; static ssize_t show_value(struct device *dev, struct device_attribute *attr, char *buf){ struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); struct hid_sensor_hub_attribute_info *attribute; int index, usage, field_index; char name[HID_CUSTOM_NAME_LENGTH]; bool feature = false; bool input = false; int value = 0; if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage, name) == 3) { feature = true; field_index = index + sensor_inst->input_field_count; } else if (sscanf(attr->attr.name, "input-%x-%x-%s", &index, &usage, name) == 3) { input = true; field_index = index; } else return -EINVAL; if (!strncmp(name, "value", strlen("value"))) { u32 report_id; int ret; attribute = &sensor_inst->fields[field_index].attribute; report_id = attribute->report_id; if (feature) { u8 values[HID_CUSTOM_MAX_FEATURE_BYTES]; int len = 0; u64 value = 0; int i = 0; ret = sensor_hub_get_feature(sensor_inst->hsdev, report_id, index, sizeof(values), values); if (ret < 0) return ret; while (i < ret) { if (i + attribute->size > ret) { len += scnprintf(&buf[len], PAGE_SIZE - len, "%d ", values[i]); break; } switch (attribute->size) { case 2: value = (u64) *(u16 *)&values[i]; i += attribute->size; break; case 4: value = (u64) *(u32 *)&values[i]; i += attribute->size; break; case 8: value = *(u64 *)&values[i]; i += attribute->size; break; default: value = (u64) values[i]; ++i; break; } len += scnprintf(&buf[len], PAGE_SIZE - len, "%lld ", value); } len += scnprintf(&buf[len], PAGE_SIZE - len, "\n"); return len; } else if (input) value = sensor_hub_input_attr_get_raw_value( sensor_inst->hsdev, sensor_inst->hsdev->usage, usage, report_id, SENSOR_HUB_SYNC, false); } else if (!strncmp(name, "units", strlen("units"))) value = sensor_inst->fields[field_index].attribute.units; else if (!strncmp(name, "unit-expo", strlen("unit-expo"))) value = sensor_inst->fields[field_index].attribute.unit_expo; else if (!strncmp(name, "size", strlen("size"))) value = sensor_inst->fields[field_index].attribute.size; else if (!strncmp(name, "minimum", strlen("minimum"))) value = sensor_inst->fields[field_index].attribute. logical_minimum; else if (!strncmp(name, "maximum", strlen("maximum"))) value = sensor_inst->fields[field_index].attribute. logical_maximum; else if (!strncmp(name, "name", strlen("name"))) { struct hid_custom_usage_desc *usage_desc; usage_desc = bsearch(&usage, hid_custom_usage_desc_table, ARRAY_SIZE(hid_custom_usage_desc_table), sizeof(struct hid_custom_usage_desc), usage_id_cmp); if (usage_desc) return sysfs_emit(buf, "%s\n", usage_desc->desc); else return sysfs_emit(buf, "not-specified\n"); } else return -EINVAL; return sysfs_emit(buf, "%d\n", value);} static ssize_t store_value(struct device *dev, struct device_attribute *attr, const char *buf, size_t count){ struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); int index, field_index, usage; char name[HID_CUSTOM_NAME_LENGTH]; int value, ret; if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage, name) == 3) { field_index = index + sensor_inst->input_field_count; } else return -EINVAL; if (!strncmp(name, "value", strlen("value"))) { u32 report_id; if (kstrtoint(buf, 0, &value) != 0) return -EINVAL; report_id = sensor_inst->fields[field_index].attribute. report_id; ret = sensor_hub_set_feature(sensor_inst->hsdev, report_id, index, sizeof(value), &value); if (ret) return ret; } else return -EINVAL; return count;} static int hid_sensor_capture_sample(struct hid_sensor_hub_device *hsdev, unsigned usage_id, size_t raw_len, char *raw_data, void *priv){ struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv); struct hid_sensor_sample header; /* If any error occurs in a sample, rest of the fields are ignored */ if (sensor_inst->input_skip_sample) { hid_err(sensor_inst->hsdev->hdev, "Skipped remaining data\n"); return 0; } hid_dbg(sensor_inst->hsdev->hdev, "%s received %d of %d\n", __func__, (int) (sensor_inst->input_report_recd_size + raw_len), sensor_inst->input_report_size); if (!test_bit(0, &sensor_inst->misc_opened)) return 0; if (!sensor_inst->input_report_recd_size) { int required_size = sizeof(struct hid_sensor_sample) + sensor_inst->input_report_size; header.usage_id = hsdev->usage; header.raw_len = sensor_inst->input_report_size; header.timestamp = ktime_get_real_ns(); if (kfifo_avail(&sensor_inst->data_fifo) >= required_size) { kfifo_in(&sensor_inst->data_fifo, (unsigned char *)&header, sizeof(header)); } else sensor_inst->input_skip_sample = true; } if (kfifo_avail(&sensor_inst->data_fifo) >= raw_len) kfifo_in(&sensor_inst->data_fifo, (unsigned char *)raw_data, raw_len); sensor_inst->input_report_recd_size += raw_len; return 0;} static int hid_sensor_send_event(struct hid_sensor_hub_device *hsdev, unsigned usage_id, void *priv){ struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv); if (!test_bit(0, &sensor_inst->misc_opened)) return 0; sensor_inst->input_report_recd_size = 0; sensor_inst->input_skip_sample = false; wake_up(&sensor_inst->wait); return 0;} static int hid_sensor_custom_add_field(struct hid_sensor_custom *sensor_inst, int index, int report_type, struct hid_report *report, struct hid_field *field){ struct hid_sensor_custom_field *sensor_field; void *fields; fields = krealloc(sensor_inst->fields, (sensor_inst->sensor_field_count + 1) * sizeof(struct hid_sensor_custom_field), GFP_KERNEL); if (!fields) { kfree(sensor_inst->fields); return -ENOMEM; } sensor_inst->fields = fields; sensor_field = &sensor_inst->fields[sensor_inst->sensor_field_count]; sensor_field->attribute.usage_id = sensor_inst->hsdev->usage; if (field->logical) sensor_field->attribute.attrib_id = field->logical; else sensor_field->attribute.attrib_id = field->usage[0].hid; sensor_field->attribute.index = index; sensor_field->attribute.report_id = report->id; sensor_field->attribute.units = field->unit; sensor_field->attribute.unit_expo = field->unit_exponent;Lines 1–500 of 1082. Load more
// SPDX-License-Identifier: GPL-2.0-only /* * hid-sensor-custom.c * Copyright (c) 2015, Intel Corporation. */ #include <linux/ctype.h> #include <linux/dmi.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/miscdevice.h> #include <linux/kfifo.h> #include <linux/sched.h> #include <linux/wait.h> #include <linux/poll.h> #include <linux/bsearch.h> #include <linux/platform_device.h> #include <linux/hid-sensor-hub.h> #define HID_CUSTOM_NAME_LENGTH 64 #define HID_CUSTOM_MAX_CORE_ATTRS 10 #define HID_CUSTOM_TOTAL_ATTRS (HID_CUSTOM_MAX_CORE_ATTRS + 1) #define HID_CUSTOM_FIFO_SIZE 4096 #define HID_CUSTOM_MAX_FEATURE_BYTES 64 #define HID_SENSOR_USAGE_LENGTH (4 + 1) struct hid_sensor_custom_field { int report_id; char group_name[HID_CUSTOM_NAME_LENGTH]; struct hid_sensor_hub_attribute_info attribute; struct device_attribute sd_attrs[HID_CUSTOM_MAX_CORE_ATTRS]; char attr_name[HID_CUSTOM_TOTAL_ATTRS][HID_CUSTOM_NAME_LENGTH]; struct attribute *attrs[HID_CUSTOM_TOTAL_ATTRS]; struct attribute_group hid_custom_attribute_group; }; struct hid_sensor_custom { struct mutex mutex; struct platform_device *pdev; struct hid_sensor_hub_device *hsdev; struct hid_sensor_hub_callbacks callbacks; int sensor_field_count; struct hid_sensor_custom_field *fields; int input_field_count; int input_report_size; int input_report_recd_size; bool input_skip_sample; bool enable; struct hid_sensor_custom_field *power_state; struct hid_sensor_custom_field *report_state; struct miscdevice custom_dev; struct kfifo data_fifo; unsigned long misc_opened; wait_queue_head_t wait; struct platform_device *custom_pdev; }; /* Header for each sample to user space via dev interface */ struct hid_sensor_sample { u32 usage_id; u64 timestamp; u32 raw_len; } __packed; static struct attribute hid_custom_attrs[HID_CUSTOM_TOTAL_ATTRS] = { {.name = "name", .mode = S_IRUGO}, {.name = "units", .mode = S_IRUGO}, {.name = "unit-expo", .mode = S_IRUGO}, {.name = "minimum", .mode = S_IRUGO}, {.name = "maximum", .mode = S_IRUGO}, {.name = "size", .mode = S_IRUGO}, {.name = "value", .mode = S_IWUSR | S_IRUGO}, {.name = NULL} }; static const struct hid_custom_usage_desc { int usage_id; char *desc; } hid_custom_usage_desc_table[] = { {0x200201, "event-sensor-state"}, {0x200202, "event-sensor-event"}, {0x200301, "property-friendly-name"}, {0x200302, "property-persistent-unique-id"}, {0x200303, "property-sensor-status"}, {0x200304, "property-min-report-interval"}, {0x200305, "property-sensor-manufacturer"}, {0x200306, "property-sensor-model"}, {0x200307, "property-sensor-serial-number"}, {0x200308, "property-sensor-description"}, {0x200309, "property-sensor-connection-type"}, {0x20030A, "property-sensor-device-path"}, {0x20030B, "property-hardware-revision"}, {0x20030C, "property-firmware-version"}, {0x20030D, "property-release-date"}, {0x20030E, "property-report-interval"}, {0x20030F, "property-change-sensitivity-absolute"}, {0x200310, "property-change-sensitivity-percent-range"}, {0x200311, "property-change-sensitivity-percent-relative"}, {0x200312, "property-accuracy"}, {0x200313, "property-resolution"}, {0x200314, "property-maximum"}, {0x200315, "property-minimum"}, {0x200316, "property-reporting-state"}, {0x200317, "property-sampling-rate"}, {0x200318, "property-response-curve"}, {0x200319, "property-power-state"}, {0x200540, "data-field-custom"}, {0x200541, "data-field-custom-usage"}, {0x200542, "data-field-custom-boolean-array"}, {0x200543, "data-field-custom-value"}, {0x200544, "data-field-custom-value_1"}, {0x200545, "data-field-custom-value_2"}, {0x200546, "data-field-custom-value_3"}, {0x200547, "data-field-custom-value_4"}, {0x200548, "data-field-custom-value_5"}, {0x200549, "data-field-custom-value_6"}, {0x20054A, "data-field-custom-value_7"}, {0x20054B, "data-field-custom-value_8"}, {0x20054C, "data-field-custom-value_9"}, {0x20054D, "data-field-custom-value_10"}, {0x20054E, "data-field-custom-value_11"}, {0x20054F, "data-field-custom-value_12"}, {0x200550, "data-field-custom-value_13"}, {0x200551, "data-field-custom-value_14"}, {0x200552, "data-field-custom-value_15"}, {0x200553, "data-field-custom-value_16"}, {0x200554, "data-field-custom-value_17"}, {0x200555, "data-field-custom-value_18"}, {0x200556, "data-field-custom-value_19"}, {0x200557, "data-field-custom-value_20"}, {0x200558, "data-field-custom-value_21"}, {0x200559, "data-field-custom-value_22"}, {0x20055A, "data-field-custom-value_23"}, {0x20055B, "data-field-custom-value_24"}, {0x20055C, "data-field-custom-value_25"}, {0x20055D, "data-field-custom-value_26"}, {0x20055E, "data-field-custom-value_27"}, {0x20055F, "data-field-custom-value_28"}, }; static int usage_id_cmp(const void *p1, const void *p2) { if (*(int *)p1 < *(int *)p2) return -1; if (*(int *)p1 > *(int *)p2) return 1; return 0; } static ssize_t enable_sensor_show(struct device *dev, struct device_attribute *attr, char *buf) { struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); return sysfs_emit(buf, "%d\n", sensor_inst->enable); } static int set_power_report_state(struct hid_sensor_custom *sensor_inst, bool state) { int power_val = -1; int report_val = -1; u32 power_state_usage_id; u32 report_state_usage_id; int ret; /* * It is possible that the power/report state ids are not present. * In this case this function will return success. But if the * ids are present, then it will return error if set fails. */ if (state) { power_state_usage_id = HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM; report_state_usage_id = HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM; } else { power_state_usage_id = HID_USAGE_SENSOR_PROP_POWER_STATE_D4_POWER_OFF_ENUM; report_state_usage_id = HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM; } if (sensor_inst->power_state) power_val = hid_sensor_get_usage_index(sensor_inst->hsdev, sensor_inst->power_state->attribute.report_id, sensor_inst->power_state->attribute.index, power_state_usage_id); if (sensor_inst->report_state) report_val = hid_sensor_get_usage_index(sensor_inst->hsdev, sensor_inst->report_state->attribute.report_id, sensor_inst->report_state->attribute.index, report_state_usage_id); if (power_val >= 0) { power_val += sensor_inst->power_state->attribute.logical_minimum; ret = sensor_hub_set_feature(sensor_inst->hsdev, sensor_inst->power_state->attribute.report_id, sensor_inst->power_state->attribute.index, sizeof(power_val), &power_val); if (ret) { hid_err(sensor_inst->hsdev->hdev, "Set power state failed\n"); return ret; } } if (report_val >= 0) { report_val += sensor_inst->report_state->attribute.logical_minimum; ret = sensor_hub_set_feature(sensor_inst->hsdev, sensor_inst->report_state->attribute.report_id, sensor_inst->report_state->attribute.index, sizeof(report_val), &report_val); if (ret) { hid_err(sensor_inst->hsdev->hdev, "Set report state failed\n"); return ret; } } return 0; } static ssize_t enable_sensor_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); int value; int ret = -EINVAL; if (kstrtoint(buf, 0, &value) != 0) return -EINVAL; mutex_lock(&sensor_inst->mutex); if (value && !sensor_inst->enable) { ret = sensor_hub_device_open(sensor_inst->hsdev); if (ret) goto unlock_state; ret = set_power_report_state(sensor_inst, true); if (ret) { sensor_hub_device_close(sensor_inst->hsdev); goto unlock_state; } sensor_inst->enable = true; } else if (!value && sensor_inst->enable) { ret = set_power_report_state(sensor_inst, false); sensor_hub_device_close(sensor_inst->hsdev); sensor_inst->enable = false; } unlock_state: mutex_unlock(&sensor_inst->mutex); if (ret < 0) return ret; return count; } static DEVICE_ATTR_RW(enable_sensor); static struct attribute *enable_sensor_attrs[] = { &dev_attr_enable_sensor.attr, NULL, }; static const struct attribute_group enable_sensor_attr_group = { .attrs = enable_sensor_attrs, }; static ssize_t show_value(struct device *dev, struct device_attribute *attr, char *buf) { struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); struct hid_sensor_hub_attribute_info *attribute; int index, usage, field_index; char name[HID_CUSTOM_NAME_LENGTH]; bool feature = false; bool input = false; int value = 0; if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage, name) == 3) { feature = true; field_index = index + sensor_inst->input_field_count; } else if (sscanf(attr->attr.name, "input-%x-%x-%s", &index, &usage, name) == 3) { input = true; field_index = index; } else return -EINVAL; if (!strncmp(name, "value", strlen("value"))) { u32 report_id; int ret; attribute = &sensor_inst->fields[field_index].attribute; report_id = attribute->report_id; if (feature) { u8 values[HID_CUSTOM_MAX_FEATURE_BYTES]; int len = 0; u64 value = 0; int i = 0; ret = sensor_hub_get_feature(sensor_inst->hsdev, report_id, index, sizeof(values), values); if (ret < 0) return ret; while (i < ret) { if (i + attribute->size > ret) { len += scnprintf(&buf[len], PAGE_SIZE - len, "%d ", values[i]); break; } switch (attribute->size) { case 2: value = (u64) *(u16 *)&values[i]; i += attribute->size; break; case 4: value = (u64) *(u32 *)&values[i]; i += attribute->size; break; case 8: value = *(u64 *)&values[i]; i += attribute->size; break; default: value = (u64) values[i]; ++i; break; } len += scnprintf(&buf[len], PAGE_SIZE - len, "%lld ", value); } len += scnprintf(&buf[len], PAGE_SIZE - len, "\n"); return len; } else if (input) value = sensor_hub_input_attr_get_raw_value( sensor_inst->hsdev, sensor_inst->hsdev->usage, usage, report_id, SENSOR_HUB_SYNC, false); } else if (!strncmp(name, "units", strlen("units"))) value = sensor_inst->fields[field_index].attribute.units; else if (!strncmp(name, "unit-expo", strlen("unit-expo"))) value = sensor_inst->fields[field_index].attribute.unit_expo; else if (!strncmp(name, "size", strlen("size"))) value = sensor_inst->fields[field_index].attribute.size; else if (!strncmp(name, "minimum", strlen("minimum"))) value = sensor_inst->fields[field_index].attribute. logical_minimum; else if (!strncmp(name, "maximum", strlen("maximum"))) value = sensor_inst->fields[field_index].attribute. logical_maximum; else if (!strncmp(name, "name", strlen("name"))) { struct hid_custom_usage_desc *usage_desc; usage_desc = bsearch(&usage, hid_custom_usage_desc_table, ARRAY_SIZE(hid_custom_usage_desc_table), sizeof(struct hid_custom_usage_desc), usage_id_cmp); if (usage_desc) return sysfs_emit(buf, "%s\n", usage_desc->desc); else return sysfs_emit(buf, "not-specified\n"); } else return -EINVAL; return sysfs_emit(buf, "%d\n", value); } static ssize_t store_value(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); int index, field_index, usage; char name[HID_CUSTOM_NAME_LENGTH]; int value, ret; if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage, name) == 3) { field_index = index + sensor_inst->input_field_count; } else return -EINVAL; if (!strncmp(name, "value", strlen("value"))) { u32 report_id; if (kstrtoint(buf, 0, &value) != 0) return -EINVAL; report_id = sensor_inst->fields[field_index].attribute. report_id; ret = sensor_hub_set_feature(sensor_inst->hsdev, report_id, index, sizeof(value), &value); if (ret) return ret; } else return -EINVAL; return count; } static int hid_sensor_capture_sample(struct hid_sensor_hub_device *hsdev, unsigned usage_id, size_t raw_len, char *raw_data, void *priv) { struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv); struct hid_sensor_sample header; /* If any error occurs in a sample, rest of the fields are ignored */ if (sensor_inst->input_skip_sample) { hid_err(sensor_inst->hsdev->hdev, "Skipped remaining data\n"); return 0; } hid_dbg(sensor_inst->hsdev->hdev, "%s received %d of %d\n", __func__, (int) (sensor_inst->input_report_recd_size + raw_len), sensor_inst->input_report_size); if (!test_bit(0, &sensor_inst->misc_opened)) return 0; if (!sensor_inst->input_report_recd_size) { int required_size = sizeof(struct hid_sensor_sample) + sensor_inst->input_report_size; header.usage_id = hsdev->usage; header.raw_len = sensor_inst->input_report_size; header.timestamp = ktime_get_real_ns(); if (kfifo_avail(&sensor_inst->data_fifo) >= required_size) { kfifo_in(&sensor_inst->data_fifo, (unsigned char *)&header, sizeof(header)); } else sensor_inst->input_skip_sample = true; } if (kfifo_avail(&sensor_inst->data_fifo) >= raw_len) kfifo_in(&sensor_inst->data_fifo, (unsigned char *)raw_data, raw_len); sensor_inst->input_report_recd_size += raw_len; return 0; } static int hid_sensor_send_event(struct hid_sensor_hub_device *hsdev, unsigned usage_id, void *priv) { struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv); if (!test_bit(0, &sensor_inst->misc_opened)) return 0; sensor_inst->input_report_recd_size = 0; sensor_inst->input_skip_sample = false; wake_up(&sensor_inst->wait); return 0; } static int hid_sensor_custom_add_field(struct hid_sensor_custom *sensor_inst, int index, int report_type, struct hid_report *report, struct hid_field *field) { struct hid_sensor_custom_field *sensor_field; void *fields; fields = krealloc(sensor_inst->fields, (sensor_inst->sensor_field_count + 1) * sizeof(struct hid_sensor_custom_field), GFP_KERNEL); if (!fields) { kfree(sensor_inst->fields); return -ENOMEM; } sensor_inst->fields = fields; sensor_field = &sensor_inst->fields[sensor_inst->sensor_field_count]; sensor_field->attribute.usage_id = sensor_inst->hsdev->usage; if (field->logical) sensor_field->attribute.attrib_id = field->logical; else sensor_field->attribute.attrib_id = field->usage[0].hid; sensor_field->attribute.index = index; sensor_field->attribute.report_id = report->id; sensor_field->attribute.units = field->unit; sensor_field->attribute.unit_expo = field->unit_exponent;