// SPDX-License-Identifier: GPL-2.0-only /* Fix for Trust Philips SPK6327 (145f:024b) * Modifier keys report as Array (0x00) instead of Variable (0x02) * causing LCtrl, LAlt, Super etc. to all act as LShift */ #include "vmlinux.h" #include "hid_bpf.h" #include "hid_bpf_helpers.h" #include <bpf/bpf_tracing.h> #define VID_TRUST 0x145F #define PID_SPK6327 0x024B HID_BPF_CONFIG( HID_DEVICE(BUS_USB, HID_GROUP_GENERIC, VID_TRUST, PID_SPK6327) ); SEC(HID_BPF_RDESC_FIXUP) int BPF_PROG(hid_fix_rdesc, struct hid_bpf_ctx *hctx) { __u8 *data = hid_bpf_get_data(hctx, 0, 4096); if (!data) return 0; /* Fix modifier keys: Input Array (0x00) -> Input Variable (0x02) */ if (data[101] == 0x00) data[101] = 0x02; return 0; } HID_BPF_OPS(trust_spk6327) = { .hid_rdesc_fixup = (void *)hid_fix_rdesc, }; SEC("syscall") int probe(struct hid_bpf_probe_args *ctx) { /* Only apply to interface 1 (169 bytes) not interface 0 (62 bytes) */ if (ctx->rdesc_size == 169) ctx->retval = 0; else ctx->retval = -EINVAL; return 0; } char _license[] SEC("license") = "GPL";