From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 22E673909A5; Thu, 2 Jul 2026 07:28:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=60.244.123.138 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782977328; cv=none; b=QQFHinbqjFeDEWwid/veYfHCOeuTWnvA2O4WDIFhDLEWc63hDKnLPeA6RrFlT8zpXqKHpMsA4wS+ELYktgNzELaBn1Wbl80qMK4eoWcy5z3SXzIpw8MKDGZ9voB88iiujFGJOBQpYAi8fXfVx8xXuTuFx6mpvlwhFgz0vXVzjAo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782977328; c=relaxed/simple; bh=MmuxUMbyWpSTv6iXMU6eHpbmbJWcIObC9KVSH+TQ2Uo=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=oqOYl8URHNnScqSqqyYLOKG6A2nPymiawp55zzRQKn+M/EwG4sIS8Uc5iYnK5h/xh/5KnxhvNZ3wO4silCmLWuus8l0d7+0LyOqTlj0qhkRel3ic7VaNmf1GLJoGN6vFevCyrf5yPzAPf7rQErndUvtWTSxb5vThUPgC0d+GEMQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=g224jKqu; arc=none smtp.client-ip=60.244.123.138 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="g224jKqu" X-UUID: a76a24ce75e711f1b1788b6acf885367-20260702 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=YrokdWiFgz0+RYg6HbNZ5ygyiWPZhg28Eg4oHlA2GLA=; b=g224jKquWWtAwZvjv8/NmC17exFsGjX9nrG40d4fdwhrz/pOEt9fX/pInwQeVXF9WFZGfZZjpEl4p2sFsXijkHnaf3dspZJ+lqSZ9qNBKEIjlo71Ed3DOX6DotecB0/pP1ryR0nz1m9m4LVswivEBOjEXTbq6m82m1674MhWz4k=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.17,REQID:8de50ae9-5aff-4dd8-905c-ce80bbe09d8a,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:d497b38,CLOUDID:8c9db4c4-4062-4a8f-9776-acbccc936972,B ulkID:nil,BulkQuantity:0,SF:102|136|836|865|888|898,TC:-5,Content:0|15|50| 99|100|102|156|200|213,EDM:-3|-100,IP:nil,URL:0,File:130,RT:0,Bulk:nil,QS: nil,BEC:-1,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC :0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: a76a24ce75e711f1b1788b6acf885367-20260702 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 35107671; Thu, 02 Jul 2026 15:28:43 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.29; Thu, 2 Jul 2026 15:28:41 +0800 Received: from mtksitap99.mediatek.inc (10.233.130.16) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.2562.29 via Frontend Transport; Thu, 2 Jul 2026 15:28:41 +0800 From: Chris Lu To: Marcel Holtmann , Johan Hedberg , Luiz Von Dentz CC: Sean Wang , Will Lee , SS Wu , Steve Lee , linux-bluetooth , linux-kernel , linux-mediatek , Paul Menzel , Chris Lu Subject: [PATCH v8 0/5] Bluetooth: btmtk: Add MT7928 support Date: Thu, 2 Jul 2026 15:28:35 +0800 Message-ID: <20260702072840.1712057-1-chris.lu@mediatek.com> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain This patch series adds support for MT7928 (device ID 0x7935) to the btmtk driver, which requires a new two-stage firmware loading process with CBMCU firmware. The series is organized to fix existing issues first, then improve code quality, and finally add new functionality: Patch 1 fixes a pre-existing security issue in btmtk_setup_firmware_79xx() by adding comprehensive firmware size validation to prevent out-of-bounds memory access with truncated or malicious firmware files. Patch 2 fixes a regression introduced in commit 28b7c5a6db74 ("Bluetooth: btmtk: Add MT6639 (MT7927) Bluetooth support") where SDIO devices would incorrectly log "BT HW ver: 0x0000" due to hardcoded dev_id=0. The fix passes the device ID read from hardware register (0x70010200) to mt79xx_setup(), ensuring SDIO devices display the correct chip ID, matching the USB driver behavior. Patch 3 refactors existing firmware download code by replacing magic numbers with a descriptive BTMTK_WMT_PKT_* enum, making the packet sequencing logic clearer. Patch 4 improves BT firmware logging to provide more useful information for debugging: adds firmware filename before loading and displays chip ID as HW version instead of firmware's hwver field. Patch 5 implements MT7928 firmware download flow, which requires loading CBMCU firmware before Bluetooth firmware. The CBMCU firmware uses a two-phase download sequence: Phase 1 downloads the section containing global descriptor and signature data, Phase 2 downloads the remaining firmware sections. Tested on MT7928 hardware with successful firmware loading and Bluetooth functionality verification. Changes in v8: - Add Patch 1 to fix firmware size validation in btmtk_setup_firmware_79xx() - Add Patch 2 to fix SDIO device logging regression SDIO devices were passing hardcoded 0, causing "BT HW ver: 0x0000" log Changes in v7: - Patch 3 (was Patch 1): Extend magic number refactoring to btmtk_setup_firmware() in addition to btmtk_setup_firmware_79xx() for consistency - Patch 4 (was Patch 2): Fix potential buffer over-read by using %.16s format specifier for hdr->datetime which is a 16-byte array that may not be null-terminated - Patch 5 (was Patch 3): Apply same %.16s fix to CBMCU firmware logging Changes in v6: - Fix timeout handling in btmtk_cbmcu_patch_status() to return -ETIMEDOUT instead of success when polling exhausts retry count - Add integer overflow protection in btmtk_load_cbmcu_firmware() using check_mul_overflow() and check_add_overflow() Changes in v5: - Split into three patches: refactoring, logging improvement, and new feature - Add Patch 2 to improve BT firmware logging independently - Apply same logging improvements to CBMCU firmware in Patch 3 Changes in v4: - Split into two patches: refactoring and new feature - Add BTMTK_WMT_PKT_* enum to improve code readability - Replace magic numbers (0xF0, 0xF1) with descriptive macros Changes in v3: - Add firmware size validation with bounds checking - Improve error messages with context information Changes in v2: - Simplified enum usage by consolidating status definitions Chris Lu (5): Bluetooth: btmtk: Add firmware size validation in btmtk_setup_firmware_79xx() Bluetooth: btmtksdio: Pass hardware dev_id to mt79xx_setup() Bluetooth: btmtk: Replace magic numbers with WMT packet flag enum Bluetooth: btmtk: Improve BT firmware logging Bluetooth: btmtk: Add MT7928 support drivers/bluetooth/btmtk.c | 427 +++++++++++++++++++++++++++++++++- drivers/bluetooth/btmtk.h | 9 + drivers/bluetooth/btmtksdio.c | 6 +- 3 files changed, 430 insertions(+), 12 deletions(-) -- 2.45.2