From patchwork Fri Dec 15 06:37:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hao Qin X-Patchwork-Id: 13494024 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 0BD1ECA68; Fri, 15 Dec 2023 06:40:08 +0000 (UTC) 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="cEqYxVbK" X-UUID: c5d81fb69b1411eea5db2bebc7c28f94-20231215 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=BTCqKfdwdR9v46nV62z59E3sFP0odYPdEQLNmh4+llU=; b=cEqYxVbKs3VPo4AxOjw3XAhJSwoby8Xb4LO9qNx3TRORAGykptMjEOTR/puo2KmVKPuz3xJLInxtvADBMrjeJ4kpdTNAmczVbLphMph+chaV9uJfrdUSsG3jllR/Y2S82ioHy6YcgGYGOr51RrFVWn0fXWYBKd4aA7SKpH2+UIU=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.35,REQID:68d2a743-a06a-49f2-bfb6-3b8bd3ae02c9,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:5d391d7,CLOUDID:0b79d273-1bd3-4f48-b671-ada88705968c,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO, DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: c5d81fb69b1411eea5db2bebc7c28f94-20231215 Received: from mtkmbs14n1.mediatek.inc [(172.21.101.75)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1908214513; Fri, 15 Dec 2023 14:40:01 +0800 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by mtkmbs13n2.mediatek.inc (172.21.101.108) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Fri, 15 Dec 2023 14:40:00 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Fri, 15 Dec 2023 14:39:59 +0800 From: Hao Qin To: Marcel Holtmann , Johan Hedberg , Luiz Von Dentz CC: Sean Wang , Deren Wu , Aaron Hou , Chris Lu , Steve Lee , linux-bluetooth , linux-kernel , linux-mediatek , hao.qin Subject: [PATCH 1/1] Bluetooth: btusb: mediatek: add a recovery method for MT7922 Date: Fri, 15 Dec 2023 14:37:14 +0800 Message-ID: <20231215063714.7684-1-hao.qin@mediatek.com> X-Mailer: git-send-email 2.18.0 Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: "hao.qin" For MT7922, perform a reset before patch download to avoid unexpected problems caused by inconsistency between upper layer status and dongle status. Add USB reset retry to recover from unexpected patch download failure. Signed-off-by: hao.qin --- drivers/bluetooth/btusb.c | 66 +++++++++++++++++++++++++++------------ 1 file changed, 46 insertions(+), 20 deletions(-) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 0926e4451802..778e1a0d9cae 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2812,7 +2812,7 @@ static int btusb_mtk_hci_wmt_sync(struct hci_dev *hdev, * WMT command. */ err = wait_on_bit_timeout(&data->flags, BTUSB_TX_WAIT_VND_EVT, - TASK_INTERRUPTIBLE, HCI_INIT_TIMEOUT); + TASK_INTERRUPTIBLE, HCI_CMD_TIMEOUT); if (err == -EINTR) { bt_dev_err(hdev, "Execution of wmt command interrupted"); clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags); @@ -2994,28 +2994,22 @@ static u32 btusb_mtk_reset_done(struct hci_dev *hdev) return val & MTK_BT_RST_DONE; } -static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data) +static int btusb_mtk_subsys_reset(struct hci_dev *hdev, u32 dev_id) { struct btusb_data *data = hci_get_drvdata(hdev); - struct btmediatek_data *mediatek; u32 val; int err; - /* It's MediaTek specific bluetooth reset mechanism via USB */ - if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) { - bt_dev_err(hdev, "last reset failed? Not resetting again"); - return -EBUSY; - } - - err = usb_autopm_get_interface(data->intf); - if (err < 0) - return err; - - btusb_stop_traffic(data); - usb_kill_anchored_urbs(&data->tx_anchor); - mediatek = hci_get_priv(hdev); - - if (mediatek->dev_id == 0x7925) { + if (dev_id == 0x7922) { + btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val); + val |= 0x00002020; + btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, val); + btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, 0x00010001); + btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val); + val |= (1 << 0); + btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, val); + msleep(100); + } else if (dev_id == 0x7925) { btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val); val |= (1 << 5); btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val); @@ -3053,14 +3047,41 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data) err = readx_poll_timeout(btusb_mtk_reset_done, hdev, val, val & MTK_BT_RST_DONE, 20000, 1000000); if (err < 0) - bt_dev_err(hdev, "Reset timeout"); + bt_dev_err(hdev, "Subsys reset timeout"); + + if (dev_id == 0x7922) + btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF); btusb_mtk_id_get(data, 0x70010200, &val); if (!val) bt_dev_err(hdev, "Can't get device id, subsys reset fail."); - usb_queue_reset_device(data->intf); + return err; +} + +static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data) +{ + struct btusb_data *data = hci_get_drvdata(hdev); + struct btmediatek_data *mediatek; + int err; + + /* It's MediaTek specific bluetooth reset mechanism via USB */ + if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) { + bt_dev_err(hdev, "last reset failed? Not resetting again"); + return -EBUSY; + } + + err = usb_autopm_get_interface(data->intf); + if (err < 0) + return err; + + btusb_stop_traffic(data); + usb_kill_anchored_urbs(&data->tx_anchor); + mediatek = hci_get_priv(hdev); + err = btusb_mtk_subsys_reset(hdev, mediatek->dev_id); + + usb_queue_reset_device(data->intf); clear_bit(BTUSB_HW_RESET_ACTIVE, &data->flags); return err; @@ -3119,6 +3140,8 @@ static int btusb_mtk_setup(struct hci_dev *hdev) fwname = FIRMWARE_MT7668; break; case 0x7922: + btusb_mtk_subsys_reset(hdev, dev_id); + fallthrough; case 0x7961: case 0x7925: if (dev_id == 0x7925) @@ -3134,6 +3157,9 @@ static int btusb_mtk_setup(struct hci_dev *hdev) btusb_mtk_hci_wmt_sync); if (err < 0) { bt_dev_err(hdev, "Failed to set up firmware (%d)", err); + btusb_stop_traffic(data); + usb_kill_anchored_urbs(&data->tx_anchor); + usb_queue_reset_device(data->intf); return err; }