| 1 | // SPDX-License-Identifier: GPL-2.0+ |
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| 2 | /* |
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| 3 | * HID driver for Topre REALFORCE Keyboards |
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| 4 | * |
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| 5 | * Copyright (c) 2022 Harry Stern <harry@harrystern.net> |
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| 6 | * |
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| 7 | * Based on the hid-macally driver |
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| 8 | */ |
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| 9 | |
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| 10 | #include <linux/hid.h> |
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| 11 | #include <linux/module.h> |
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| 12 | |
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| 13 | #include "hid-ids.h" |
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| 14 | |
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| 15 | MODULE_AUTHOR("Harry Stern <harry@harrystern.net>" ); |
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| 16 | MODULE_DESCRIPTION("REALFORCE R2 Keyboard driver" ); |
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| 17 | MODULE_LICENSE("GPL" ); |
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| 18 | |
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| 19 | /* |
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| 20 | * Fix the REALFORCE R2's non-boot interface's report descriptor to match the |
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| 21 | * events it's actually sending. It claims to send array events but is instead |
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| 22 | * sending variable events. |
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| 23 | */ |
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| 24 | static __u8 *topre_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
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| 25 | unsigned int *rsize) |
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| 26 | { |
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| 27 | if (*rsize >= 119 && rdesc[69] == 0x29 && rdesc[70] == 0xe7 && |
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| 28 | rdesc[71] == 0x81 && rdesc[72] == 0x00) { |
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| 29 | hid_info(hdev, |
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| 30 | "fixing up Topre REALFORCE keyboard report descriptor\n" ); |
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| 31 | rdesc[72] = 0x02; |
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| 32 | } |
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| 33 | return rdesc; |
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| 34 | } |
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| 35 | |
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| 36 | static const struct hid_device_id topre_id_table[] = { |
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| 37 | { HID_USB_DEVICE(USB_VENDOR_ID_TOPRE, |
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| 38 | USB_DEVICE_ID_TOPRE_REALFORCE_R2_108) }, |
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| 39 | { HID_USB_DEVICE(USB_VENDOR_ID_TOPRE, |
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| 40 | USB_DEVICE_ID_TOPRE_REALFORCE_R2_87) }, |
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| 41 | { } |
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| 42 | }; |
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| 43 | MODULE_DEVICE_TABLE(hid, topre_id_table); |
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| 44 | |
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| 45 | static struct hid_driver topre_driver = { |
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| 46 | .name = "topre" , |
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| 47 | .id_table = topre_id_table, |
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| 48 | .report_fixup = topre_report_fixup, |
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| 49 | }; |
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| 50 | |
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| 51 | module_hid_driver(topre_driver); |
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| 52 | |
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