Notices and sources

The procedure in src/MtkBt.cpp is ported from drivers/bluetooth/btmtk.c and btmtk.h in Linux v6.18 (https://github.com/torvalds/linux, tag v6.18), SPDX ISC, Copyright (C) 2021 MediaTek Inc.: btmtk_usb_setup (the 0x7925 case), btmtk_setup_firmware_79xx, btmtk_usb_hci_wmt_sync, btmtk_usb_reg_read, btmtk_usb_uhw_reg_read / _write, btmtk_usb_subsys_reset, and the register and opcode constants.

Cross-checked against and partly adapted from kexts/MtkBtFw/MtkBtFw.cpp of https://github.com/thanhnndev/ga403wm-hackintosh, Copyright (c) 2026 thanhnndev and contributors, The Clear BSD License. Adapted parts: the IOUSBHostInterface match on interface 0, the open / work / close pattern, the descriptor walk for the interrupt endpoint and the interrupt drain. Their notice is kept in full at the top of src/MtkBt.cpp and in LICENSES/BSD-3-Clause-Clear-itlmt7925.txt; any binary distribution of MtkBt must carry it.

firmware/BT_RAM_CODE_MT7925_1_1_hdr.bin is MediaTek's, from linux-firmware (https://gitlab.com/kernel-firmware/linux-firmware, commit d5455717ead0, mediatek/mt7925/), unmodified, sha256 be7c18e37221e277baaef853be3a0ba930138ee879f336ff7b185e79ab09a5c9, redistributable under LICENSES/LICENCE.mediatek (for use with MediaTek devices). It is not under ISC or Clear BSD. The build embeds it in the kext.

• BlueToolFixup (acidanthera/BrcmPatchRAM, created by Dhinak G, GPL-2.0) is what lets bluetoothd use the controller after MtkBt has loaded its firmware. Nothing from it is in this repository.
• src/kmod_info.c reproduces the kmod_info block Xcode generates, using Apple's KMOD_EXPLICIT_DECL macro.

Copyright (C) 2026 watchthelight, ISC (LICENSE). A good portion of the code was written with Claude Code (Anthropic).