drivers/hid/hid-petalynx.c

Source file repositories/reference/linux-study-clean/drivers/hid/hid-petalynx.c

File Facts

System
Linux kernel
Corpus path
drivers/hid/hid-petalynx.c
Extension
.c
Size
2669 bytes
Lines
107
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 (usage->hid & HID_USAGE) {
		case 0x05a: pl_map_key_clear(KEY_TEXT);		break;
		case 0x05b: pl_map_key_clear(KEY_RED);		break;
		case 0x05c: pl_map_key_clear(KEY_GREEN);	break;
		case 0x05d: pl_map_key_clear(KEY_YELLOW);	break;
		case 0x05e: pl_map_key_clear(KEY_BLUE);		break;
		default:
			return 0;
		}
		return 1;
	}

	if ((usage->hid & HID_USAGE_PAGE) == HID_UP_CONSUMER) {
		switch (usage->hid & HID_USAGE) {
		case 0x0f6: pl_map_key_clear(KEY_NEXT);		break;
		case 0x0fa: pl_map_key_clear(KEY_BACK);		break;
		default:
			return 0;
		}
		return 1;
	}

	return 0;
}

static int pl_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
	int ret;

	hdev->quirks |= HID_QUIRK_NOGET;

	ret = hid_parse(hdev);
	if (ret) {
		hid_err(hdev, "parse failed\n");
		goto err_free;
	}

	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	if (ret) {
		hid_err(hdev, "hw start failed\n");
		goto err_free;
	}

	return 0;
err_free:
	return ret;
}

static const struct hid_device_id pl_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_PETALYNX, USB_DEVICE_ID_PETALYNX_MAXTER_REMOTE) },
	{ }
};
MODULE_DEVICE_TABLE(hid, pl_devices);

static struct hid_driver pl_driver = {
	.name = "petalynx",
	.id_table = pl_devices,
	.report_fixup = pl_report_fixup,
	.input_mapping = pl_input_mapping,
	.probe = pl_probe,
};
module_hid_driver(pl_driver);

MODULE_DESCRIPTION("HID driver for some petalynx \"special\" devices");
MODULE_LICENSE("GPL");

Annotation

Implementation Notes