drivers/hid/hid-holtek-mouse.c

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

File Facts

System
Linux kernel
Corpus path
drivers/hid/hid-holtek-mouse.c
Extension
.c
Size
3404 bytes
Lines
115
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 (hdev->product) {
		case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067:
		case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072:
		case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2:
			if (*rsize >= 122 && rdesc[115] == 0xff && rdesc[116] == 0x7f
					&& rdesc[120] == 0xff && rdesc[121] == 0x7f) {
				hid_info(hdev, "Fixing up report descriptor\n");
				rdesc[116] = rdesc[121] = 0x2f;
			}
			break;
		case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A:
		case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070:
		case USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081:
			if (*rsize >= 113 && rdesc[106] == 0xff && rdesc[107] == 0x7f
					&& rdesc[111] == 0xff && rdesc[112] == 0x7f) {
				hid_info(hdev, "Fixing up report descriptor\n");
				rdesc[107] = rdesc[112] = 0x2f;
			}
			break;
		}

	}
	return rdesc;
}

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

	if (!hid_is_usb(hdev))
		return -EINVAL;

	ret = hid_parse(hdev);
	if (ret) {
		hid_err(hdev, "hid parse failed: %d\n", ret);
		return ret;
	}

	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
	if (ret) {
		hid_err(hdev, "hw start failed: %d\n", ret);
		return ret;
	}

	return 0;
}

static const struct hid_device_id holtek_mouse_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
			USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A067) },
        { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
			USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A070) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
			USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A04A) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
			USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A072) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
			USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A081) },
	{ HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT,
			USB_DEVICE_ID_HOLTEK_ALT_MOUSE_A0C2) },
	{ }
};
MODULE_DEVICE_TABLE(hid, holtek_mouse_devices);

static struct hid_driver holtek_mouse_driver = {
	.name = "holtek_mouse",
	.id_table = holtek_mouse_devices,
	.report_fixup = holtek_mouse_report_fixup,
	.probe = holtek_mouse_probe,
};

module_hid_driver(holtek_mouse_driver);
MODULE_DESCRIPTION("HID driver for Holtek gaming mice");
MODULE_LICENSE("GPL");

Annotation

Implementation Notes