123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116 |
- /*
- * HID driver for Gembird Joypad, "PC Game Controller"
- *
- * Copyright (c) 2015 Red Hat, Inc
- * Copyright (c) 2015 Benjamin Tissoires
- */
- /*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- */
- #include <linux/device.h>
- #include <linux/hid.h>
- #include <linux/module.h>
- #include "hid-ids.h"
- #define GEMBIRD_START_FAULTY_RDESC 8
- static const __u8 gembird_jpd_faulty_rdesc[] = {
- 0x75, 0x08, /* Report Size (8) */
- 0x95, 0x05, /* Report Count (5) */
- 0x15, 0x00, /* Logical Minimum (0) */
- 0x26, 0xff, 0x00, /* Logical Maximum (255) */
- 0x35, 0x00, /* Physical Minimum (0) */
- 0x46, 0xff, 0x00, /* Physical Maximum (255) */
- 0x09, 0x30, /* Usage (X) */
- 0x09, 0x31, /* Usage (Y) */
- 0x09, 0x32, /* Usage (Z) */
- 0x09, 0x32, /* Usage (Z) */
- 0x09, 0x35, /* Usage (Rz) */
- 0x81, 0x02, /* Input (Data,Var,Abs) */
- };
- /*
- * we fix the report descriptor by:
- * - marking the first Z axis as constant (so it is ignored by HID)
- * - assign the original second Z to Rx
- * - assign the original Rz to Ry
- */
- static const __u8 gembird_jpd_fixed_rdesc[] = {
- 0x75, 0x08, /* Report Size (8) */
- 0x95, 0x02, /* Report Count (2) */
- 0x15, 0x00, /* Logical Minimum (0) */
- 0x26, 0xff, 0x00, /* Logical Maximum (255) */
- 0x35, 0x00, /* Physical Minimum (0) */
- 0x46, 0xff, 0x00, /* Physical Maximum (255) */
- 0x09, 0x30, /* Usage (X) */
- 0x09, 0x31, /* Usage (Y) */
- 0x81, 0x02, /* Input (Data,Var,Abs) */
- 0x95, 0x01, /* Report Count (1) */
- 0x09, 0x32, /* Usage (Z) */
- 0x81, 0x01, /* Input (Cnst,Arr,Abs) */
- 0x95, 0x02, /* Report Count (2) */
- 0x09, 0x33, /* Usage (Rx) */
- 0x09, 0x34, /* Usage (Ry) */
- 0x81, 0x02, /* Input (Data,Var,Abs) */
- };
- static __u8 *gembird_report_fixup(struct hid_device *hdev, __u8 *rdesc,
- unsigned int *rsize)
- {
- __u8 *new_rdesc;
- /* delta_size is > 0 */
- size_t delta_size = sizeof(gembird_jpd_fixed_rdesc) -
- sizeof(gembird_jpd_faulty_rdesc);
- size_t new_size = *rsize + delta_size;
- if (*rsize >= 31 && !memcmp(&rdesc[GEMBIRD_START_FAULTY_RDESC],
- gembird_jpd_faulty_rdesc,
- 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");
|