| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Benjamin Tissoires | 247 | 100.00% | 3 | 100.00% |
| Total | 247 | 3 |
// SPDX-License-Identifier: GPL-2.0-only /* Copyright (c) 2024 Benjamin Tissoires */ #include "vmlinux.h" #include "hid_bpf.h" #include "hid_bpf_helpers.h" #include <bpf/bpf_tracing.h> #define VID_BETOP_2185PC 0x11C0 #define PID_RAPTOR_MACH_2 0x5606 HID_BPF_CONFIG( HID_DEVICE(BUS_USB, HID_GROUP_GENERIC, VID_BETOP_2185PC, PID_RAPTOR_MACH_2), ); /* * For reference, this is the fixed report descriptor * * static const __u8 fixed_rdesc[] = { * 0x05, 0x01, // Usage Page (Generic Desktop) 0 * 0x09, 0x04, // Usage (Joystick) 2 * 0xa1, 0x01, // Collection (Application) 4 * 0x05, 0x01, // Usage Page (Generic Desktop) 6 * 0x85, 0x01, // Report ID (1) 8 * 0x05, 0x01, // Usage Page (Generic Desktop) 10 * 0x09, 0x30, // Usage (X) 12 * 0x75, 0x10, // Report Size (16) 14 * 0x95, 0x01, // Report Count (1) 16 * 0x15, 0x00, // Logical Minimum (0) 18 * 0x26, 0xff, 0x07, // Logical Maximum (2047) 20 * 0x46, 0xff, 0x07, // Physical Maximum (2047) 23 * 0x81, 0x02, // Input (Data,Var,Abs) 26 * 0x05, 0x01, // Usage Page (Generic Desktop) 28 * 0x09, 0x31, // Usage (Y) 30 * 0x75, 0x10, // Report Size (16) 32 * 0x95, 0x01, // Report Count (1) 34 * 0x15, 0x00, // Logical Minimum (0) 36 * 0x26, 0xff, 0x07, // Logical Maximum (2047) 38 * 0x46, 0xff, 0x07, // Physical Maximum (2047) 41 * 0x81, 0x02, // Input (Data,Var,Abs) 44 * 0x05, 0x01, // Usage Page (Generic Desktop) 46 * 0x09, 0x33, // Usage (Rx) 48 * 0x75, 0x10, // Report Size (16) 50 * 0x95, 0x01, // Report Count (1) 52 * 0x15, 0x00, // Logical Minimum (0) 54 * 0x26, 0xff, 0x03, // Logical Maximum (1023) 56 * 0x46, 0xff, 0x03, // Physical Maximum (1023) 59 * 0x81, 0x02, // Input (Data,Var,Abs) 62 * 0x05, 0x00, // Usage Page (Undefined) 64 * 0x09, 0x00, // Usage (Undefined) 66 * 0x75, 0x10, // Report Size (16) 68 * 0x95, 0x01, // Report Count (1) 70 * 0x15, 0x00, // Logical Minimum (0) 72 * 0x26, 0xff, 0x03, // Logical Maximum (1023) 74 * 0x46, 0xff, 0x03, // Physical Maximum (1023) 77 * 0x81, 0x02, // Input (Data,Var,Abs) 80 * 0x05, 0x01, // Usage Page (Generic Desktop) 82 * 0x09, 0x32, // Usage (Z) 84 * 0x75, 0x10, // Report Size (16) 86 * 0x95, 0x01, // Report Count (1) 88 * 0x15, 0x00, // Logical Minimum (0) 90 * 0x26, 0xff, 0x03, // Logical Maximum (1023) 92 * 0x46, 0xff, 0x03, // Physical Maximum (1023) 95 * 0x81, 0x02, // Input (Data,Var,Abs) 98 * 0x05, 0x01, // Usage Page (Generic Desktop) 100 * 0x09, 0x35, // Usage (Rz) 102 * 0x75, 0x10, // Report Size (16) 104 * 0x95, 0x01, // Report Count (1) 106 * 0x15, 0x00, // Logical Minimum (0) 108 * 0x26, 0xff, 0x03, // Logical Maximum (1023) 110 * 0x46, 0xff, 0x03, // Physical Maximum (1023) 113 * 0x81, 0x02, // Input (Data,Var,Abs) 116 * 0x05, 0x01, // Usage Page (Generic Desktop) 118 * 0x09, 0x34, // Usage (Ry) 120 * 0x75, 0x10, // Report Size (16) 122 * 0x95, 0x01, // Report Count (1) 124 * 0x15, 0x00, // Logical Minimum (0) 126 * 0x26, 0xff, 0x07, // Logical Maximum (2047) 128 * 0x46, 0xff, 0x07, // Physical Maximum (2047) 131 * 0x81, 0x02, // Input (Data,Var,Abs) 134 * 0x05, 0x01, // Usage Page (Generic Desktop) 136 * 0x09, 0x36, // Usage (Slider) 138 * 0x75, 0x10, // Report Size (16) 140 * 0x95, 0x01, // Report Count (1) 142 * 0x15, 0x00, // Logical Minimum (0) 144 * 0x26, 0xff, 0x03, // Logical Maximum (1023) 146 * 0x46, 0xff, 0x03, // Physical Maximum (1023) 149 * 0x81, 0x02, // Input (Data,Var,Abs) 152 * 0x05, 0x09, // Usage Page (Button) 154 * 0x19, 0x01, // Usage Minimum (1) 156 * 0x2a, 0x1d, 0x00, // Usage Maximum (29) 158 * 0x15, 0x00, // Logical Minimum (0) 161 * 0x25, 0x01, // Logical Maximum (1) 163 * 0x75, 0x01, // Report Size (1) 165 * 0x96, 0x80, 0x00, // Report Count (128) 167 * 0x81, 0x02, // Input (Data,Var,Abs) 170 * 0x05, 0x01, // Usage Page (Generic Desktop) 172 * 0x09, 0x39, // Usage (Hat switch) 174 * 0x26, 0x07, 0x00, // Logical Maximum (7) 176 // changed (was 239) * 0x46, 0x68, 0x01, // Physical Maximum (360) 179 * 0x65, 0x14, // Unit (EnglishRotation: deg) 182 * 0x75, 0x10, // Report Size (16) 184 * 0x95, 0x01, // Report Count (1) 186 * 0x81, 0x42, // Input (Data,Var,Abs,Null) 188 * 0x05, 0x01, // Usage Page (Generic Desktop) 190 * 0x09, 0x00, // Usage (Undefined) 192 * 0x75, 0x08, // Report Size (8) 194 * 0x95, 0x1d, // Report Count (29) 196 * 0x81, 0x01, // Input (Cnst,Arr,Abs) 198 * 0x15, 0x00, // Logical Minimum (0) 200 * 0x26, 0xef, 0x00, // Logical Maximum (239) 202 * 0x85, 0x58, // Report ID (88) 205 * 0x26, 0xff, 0x00, // Logical Maximum (255) 207 * 0x46, 0xff, 0x00, // Physical Maximum (255) 210 * 0x75, 0x08, // Report Size (8) 213 * 0x95, 0x3f, // Report Count (63) 215 * 0x09, 0x00, // Usage (Undefined) 217 * 0x91, 0x02, // Output (Data,Var,Abs) 219 * 0x85, 0x59, // Report ID (89) 221 * 0x75, 0x08, // Report Size (8) 223 * 0x95, 0x80, // Report Count (128) 225 * 0x09, 0x00, // Usage (Undefined) 227 * 0xb1, 0x02, // Feature (Data,Var,Abs) 229 * 0xc0, // End Collection 231 * }; */ /* * We need to amend the report descriptor for the following: * - the joystick sends its hat_switch data between 0 and 239 but * the kernel expects the logical max to stick into a signed 8 bits * integer. We thus divide it by 30 to match what other joysticks are * doing */ SEC(HID_BPF_RDESC_FIXUP) int BPF_PROG(hid_fix_rdesc_raptor_mach_2, struct hid_bpf_ctx *hctx) { __u8 *data = hid_bpf_get_data(hctx, 0 /* offset */, HID_MAX_DESCRIPTOR_SIZE /* size */); if (!data) return 0; /* EPERM check */ data[177] = 0x07; return 0; } /* * The hat_switch value at offsets 33 and 34 (16 bits) needs * to be reduced to a single 8 bit signed integer. So we * divide it by 30. * Byte 34 is always null, so it is ignored. */ SEC(HID_BPF_DEVICE_EVENT) int BPF_PROG(raptor_mach_2_fix_hat_switch, struct hid_bpf_ctx *hctx) { __u8 *data = hid_bpf_get_data(hctx, 0 /* offset */, 64 /* size */); if (!data) return 0; /* EPERM check */ if (data[0] != 0x01) /* not the joystick report ID */ return 0; data[33] /= 30; return 0; } HID_BPF_OPS(raptor_mach_2) = { .hid_rdesc_fixup = (void *)hid_fix_rdesc_raptor_mach_2, .hid_device_event = (void *)raptor_mach_2_fix_hat_switch, }; SEC("syscall") int probe(struct hid_bpf_probe_args *ctx) { ctx->retval = ctx->rdesc_size != 232; if (ctx->retval) ctx->retval = -EINVAL; /* ensure the kernel isn't fixed already */ if (ctx->rdesc[177] != 0xef) /* Logical Max of 239 */ ctx->retval = -EINVAL; return 0; } char _license[] SEC("license") = "GPL";
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