The Rapoo M50 Plus Silent mouse has 2 side buttons in addition to the left, right and middles buttons. However, its original HID descriptor has a Usage Maximum of 3, preventing the side buttons to work. This HID-BPF driver changes that usage to 5. Link: https://gitlab.freedesktop.org/libinput/libinput/-/issues/1015 Link: https://gitlab.freedesktop.org/libevdev/udev-hid-bpf/-/merge_requests/116 Signed-off-by: José Expósito <jose.exposito89@xxxxxxxxx> Signed-off-by: Benjamin Tissoires <bentiss@xxxxxxxxxx> --- drivers/hid/bpf/progs/Rapoo__M50-Plus-Silent.bpf.c | 148 +++++++++++++++++++++ 1 file changed, 148 insertions(+) diff --git a/drivers/hid/bpf/progs/Rapoo__M50-Plus-Silent.bpf.c b/drivers/hid/bpf/progs/Rapoo__M50-Plus-Silent.bpf.c new file mode 100644 index 0000000000000000000000000000000000000000..6b379e45f531dbe843fe59fd98cc12d3fd3c8cc8 --- /dev/null +++ b/drivers/hid/bpf/progs/Rapoo__M50-Plus-Silent.bpf.c @@ -0,0 +1,148 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright (c) 2024 José Expósito + */ + +#include "vmlinux.h" +#include "hid_bpf.h" +#include "hid_bpf_helpers.h" +#include <bpf/bpf_tracing.h> + +#define VID_RAPOO 0x24AE +#define PID_M50 0x2015 +#define RDESC_SIZE 186 + +HID_BPF_CONFIG( + HID_DEVICE(BUS_USB, HID_GROUP_GENERIC, VID_RAPOO, PID_M50) +); + +/* + * The Rapoo M50 Plus Silent mouse has 2 side buttons in addition to the left, + * right and middle buttons. However, its original HID descriptor has a Usage + * Maximum of 3, preventing the side buttons to work. This HID-BPF driver + * changes that usage to 5. + * + * For reference, this is the original report descriptor: + * + * 0x05, 0x01, // Usage Page (Generic Desktop) 0 + * 0x09, 0x02, // Usage (Mouse) 2 + * 0xa1, 0x01, // Collection (Application) 4 + * 0x85, 0x01, // Report ID (1) 6 + * 0x09, 0x01, // Usage (Pointer) 8 + * 0xa1, 0x00, // Collection (Physical) 10 + * 0x05, 0x09, // Usage Page (Button) 12 + * 0x19, 0x01, // Usage Minimum (1) 14 + * 0x29, 0x03, // Usage Maximum (3) 16 <- change to 0x05 + * 0x15, 0x00, // Logical Minimum (0) 18 + * 0x25, 0x01, // Logical Maximum (1) 20 + * 0x75, 0x01, // Report Size (1) 22 + * 0x95, 0x05, // Report Count (5) 24 + * 0x81, 0x02, // Input (Data,Var,Abs) 26 + * 0x75, 0x03, // Report Size (3) 28 + * 0x95, 0x01, // Report Count (1) 30 + * 0x81, 0x01, // Input (Cnst,Arr,Abs) 32 + * 0x05, 0x01, // Usage Page (Generic Desktop) 34 + * 0x09, 0x30, // Usage (X) 36 + * 0x09, 0x31, // Usage (Y) 38 + * 0x16, 0x01, 0x80, // Logical Minimum (-32767) 40 + * 0x26, 0xff, 0x7f, // Logical Maximum (32767) 43 + * 0x75, 0x10, // Report Size (16) 46 + * 0x95, 0x02, // Report Count (2) 48 + * 0x81, 0x06, // Input (Data,Var,Rel) 50 + * 0x09, 0x38, // Usage (Wheel) 52 + * 0x15, 0x81, // Logical Minimum (-127) 54 + * 0x25, 0x7f, // Logical Maximum (127) 56 + * 0x75, 0x08, // Report Size (8) 58 + * 0x95, 0x01, // Report Count (1) 60 + * 0x81, 0x06, // Input (Data,Var,Rel) 62 + * 0xc0, // End Collection 64 + * 0xc0, // End Collection 65 + * 0x05, 0x0c, // Usage Page (Consumer Devices) 66 + * 0x09, 0x01, // Usage (Consumer Control) 68 + * 0xa1, 0x01, // Collection (Application) 70 + * 0x85, 0x02, // Report ID (2) 72 + * 0x75, 0x10, // Report Size (16) 74 + * 0x95, 0x01, // Report Count (1) 76 + * 0x15, 0x01, // Logical Minimum (1) 78 + * 0x26, 0x8c, 0x02, // Logical Maximum (652) 80 + * 0x19, 0x01, // Usage Minimum (1) 83 + * 0x2a, 0x8c, 0x02, // Usage Maximum (652) 85 + * 0x81, 0x00, // Input (Data,Arr,Abs) 88 + * 0xc0, // End Collection 90 + * 0x05, 0x01, // Usage Page (Generic Desktop) 91 + * 0x09, 0x80, // Usage (System Control) 93 + * 0xa1, 0x01, // Collection (Application) 95 + * 0x85, 0x03, // Report ID (3) 97 + * 0x09, 0x82, // Usage (System Sleep) 99 + * 0x09, 0x81, // Usage (System Power Down) 101 + * 0x09, 0x83, // Usage (System Wake Up) 103 + * 0x15, 0x00, // Logical Minimum (0) 105 + * 0x25, 0x01, // Logical Maximum (1) 107 + * 0x19, 0x01, // Usage Minimum (1) 109 + * 0x29, 0x03, // Usage Maximum (3) 111 + * 0x75, 0x01, // Report Size (1) 113 + * 0x95, 0x03, // Report Count (3) 115 + * 0x81, 0x02, // Input (Data,Var,Abs) 117 + * 0x95, 0x05, // Report Count (5) 119 + * 0x81, 0x01, // Input (Cnst,Arr,Abs) 121 + * 0xc0, // End Collection 123 + * 0x05, 0x01, // Usage Page (Generic Desktop) 124 + * 0x09, 0x00, // Usage (Undefined) 126 + * 0xa1, 0x01, // Collection (Application) 128 + * 0x85, 0x05, // Report ID (5) 130 + * 0x06, 0x00, 0xff, // Usage Page (Vendor Defined Page 1) 132 + * 0x09, 0x01, // Usage (Vendor Usage 1) 135 + * 0x15, 0x81, // Logical Minimum (-127) 137 + * 0x25, 0x7f, // Logical Maximum (127) 139 + * 0x75, 0x08, // Report Size (8) 141 + * 0x95, 0x07, // Report Count (7) 143 + * 0xb1, 0x02, // Feature (Data,Var,Abs) 145 + * 0xc0, // End Collection 147 + * 0x06, 0x00, 0xff, // Usage Page (Vendor Defined Page 1) 148 + * 0x09, 0x0e, // Usage (Vendor Usage 0x0e) 151 + * 0xa1, 0x01, // Collection (Application) 153 + * 0x85, 0xba, // Report ID (186) 155 + * 0x95, 0x1f, // Report Count (31) 157 + * 0x75, 0x08, // Report Size (8) 159 + * 0x26, 0xff, 0x00, // Logical Maximum (255) 161 + * 0x15, 0x00, // Logical Minimum (0) 164 + * 0x09, 0x01, // Usage (Vendor Usage 1) 166 + * 0x91, 0x02, // Output (Data,Var,Abs) 168 + * 0x85, 0xba, // Report ID (186) 170 + * 0x95, 0x1f, // Report Count (31) 172 + * 0x75, 0x08, // Report Size (8) 174 + * 0x26, 0xff, 0x00, // Logical Maximum (255) 176 + * 0x15, 0x00, // Logical Minimum (0) 179 + * 0x09, 0x01, // Usage (Vendor Usage 1) 181 + * 0x81, 0x02, // Input (Data,Var,Abs) 183 + * 0xc0, // End Collection 185 + */ + +SEC(HID_BPF_RDESC_FIXUP) +int BPF_PROG(hid_rdesc_fixup_rapoo_m50, struct hid_bpf_ctx *hctx) +{ + __u8 *data = hid_bpf_get_data(hctx, 0, HID_MAX_DESCRIPTOR_SIZE); + + if (!data) + return 0; /* EPERM check */ + + if (data[17] == 0x03) + data[17] = 0x05; + + return 0; +} + +HID_BPF_OPS(rapoo_m50) = { + .hid_rdesc_fixup = (void *)hid_rdesc_fixup_rapoo_m50, +}; + +SEC("syscall") +int probe(struct hid_bpf_probe_args *ctx) +{ + ctx->retval = ctx->rdesc_size != RDESC_SIZE; + if (ctx->retval) + ctx->retval = -EINVAL; + + return 0; +} + +char _license[] SEC("license") = "GPL"; -- 2.47.0
