drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.c

Source file repositories/reference/linux-study-clean/drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.c

File Facts

System
Linux kernel
Corpus path
drivers/hid/amd-sfh-hid/hid_descriptor/amd_sfh_hid_desc.c
Extension
.c
Size
10284 bytes
Lines
290
Domain
Driver Families
Bucket
drivers/hid
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

switch (descriptor_name) {
		case descr_size:
			return sizeof(accel3_report_descriptor);
		case input_size:
			return sizeof(struct accel3_input_report);
		case feature_size:
			return sizeof(struct accel3_feature_report);
		}
		break;
	case gyro_idx:
		switch (descriptor_name) {
		case descr_size:
			return sizeof(gyro3_report_descriptor);
		case input_size:
			return sizeof(struct gyro_input_report);
		case feature_size:
			return sizeof(struct gyro_feature_report);
		}
		break;
	case mag_idx:
		switch (descriptor_name) {
		case descr_size:
			return sizeof(comp3_report_descriptor);
		case input_size:
			return sizeof(struct magno_input_report);
		case feature_size:
			return sizeof(struct magno_feature_report);
		}
		break;
	case als_idx:
	case ACS_IDX: /* ambient color sensor */
		switch (descriptor_name) {
		case descr_size:
			return sizeof(als_report_descriptor);
		case input_size:
			return sizeof(struct als_input_report);
		case feature_size:
			return sizeof(struct als_feature_report);
		}
		break;
	case HPD_IDX:
		switch (descriptor_name) {
		case descr_size:
			return sizeof(hpd_report_descriptor);
		case input_size:
			return sizeof(struct hpd_input_report);
		case feature_size:
			return sizeof(struct hpd_feature_report);
		}
		break;

	default:
		break;
	}
	return 0;
}

static void get_common_features(struct common_feature_property *common, int report_id)
{
	common->report_id = report_id;
	common->connection_type = HID_USAGE_SENSOR_PROPERTY_CONNECTION_TYPE_PC_INTEGRATED_ENUM;
	common->report_state = HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM;
	common->power_state = HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM;
	common->sensor_state = HID_USAGE_SENSOR_STATE_INITIALIZING_ENUM;
	common->report_interval =  HID_DEFAULT_REPORT_INTERVAL;
}

static u8 get_feature_report(int sensor_idx, int report_id, u8 *feature_report)
{
	struct accel3_feature_report acc_feature;
	struct gyro_feature_report gyro_feature;
	struct magno_feature_report magno_feature;
	struct hpd_feature_report hpd_feature;
	struct als_feature_report als_feature;
	u8 report_size = 0;

	if (!feature_report)
		return report_size;

	switch (sensor_idx) {
	case accel_idx: /* accel */
		get_common_features(&acc_feature.common_property, report_id);
		acc_feature.accel_change_sesnitivity = HID_DEFAULT_SENSITIVITY;
		acc_feature.accel_sensitivity_min = HID_DEFAULT_MIN_VALUE;
		acc_feature.accel_sensitivity_max = HID_DEFAULT_MAX_VALUE;
		memcpy(feature_report, &acc_feature, sizeof(acc_feature));
		report_size = sizeof(acc_feature);
		break;
	case gyro_idx: /* gyro */
		get_common_features(&gyro_feature.common_property, report_id);

Annotation

Implementation Notes