drivers/hid/hid-gembird.c
Source file repositories/reference/linux-study-clean/drivers/hid/hid-gembird.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/hid/hid-gembird.c- Extension
.c- Size
- 3324 bytes
- Lines
- 114
- 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.
- 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.
- Allocates kernel memory; connect allocation flags and lifetime to context constraints.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/device.hlinux/hid.hlinux/module.hhid-ids.h
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
sizeof(gembird_jpd_faulty_rdesc))) {
new_rdesc = devm_kzalloc(&hdev->dev, new_size, GFP_KERNEL);
if (new_rdesc == NULL)
return rdesc;
dev_info(&hdev->dev,
"fixing Gembird JPD-DualForce 2 report descriptor.\n");
/* start by copying the end of the rdesc */
memcpy(new_rdesc + delta_size, rdesc, *rsize);
/* add the correct beginning */
memcpy(new_rdesc, rdesc, GEMBIRD_START_FAULTY_RDESC);
/* replace the faulty part with the fixed one */
memcpy(new_rdesc + GEMBIRD_START_FAULTY_RDESC,
gembird_jpd_fixed_rdesc,
sizeof(gembird_jpd_fixed_rdesc));
*rsize = new_size;
rdesc = new_rdesc;
}
return rdesc;
}
static const struct hid_device_id gembird_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_GEMBIRD,
USB_DEVICE_ID_GEMBIRD_JPD_DUALFORCE2) },
{ }
};
MODULE_DEVICE_TABLE(hid, gembird_devices);
static struct hid_driver gembird_driver = {
.name = "gembird",
.id_table = gembird_devices,
.report_fixup = gembird_report_fixup,
};
module_hid_driver(gembird_driver);
MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
MODULE_DESCRIPTION("HID Gembird joypad driver");
MODULE_LICENSE("GPL");
Annotation
- Immediate include surface: `linux/device.h`, `linux/hid.h`, `linux/module.h`, `hid-ids.h`.
- Atlas domain: Driver Families / drivers/hid.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.