From patchwork Fri May 12 21:20:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 13239891 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6B754C77B7C for ; Fri, 12 May 2023 21:30:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=RyC+sBrNP9jY0U1et1wYi4MO7UH4FsSyLmrleV55OIc=; b=gpEtWgohEFI9whAohWA8NUsJke w8lCHfCB4+w6Z++HpqcSOx5/y8J52rZ4fYxmo7HjMLHpqiUeDhGgWahwSYV/cIvHED0QUudFWSXeI YxUkEbxfLWi8Y6SbPlFclgfH1Ez+gIOx8AmHncOrJvQi/Y95JtZsdAarkXzUhbDlCsPoRQpuM9bLi keS/pm8VG6yOi2LL6V9L1giO1e+v9rQRGHhBfSyGcZeXoOK1JpAwAGwob/DWDQla3QSSZEEQwi2Vi jwmJ9m1kt6CTuhkZZrr0+spJ9YMjU8/f6vpNijSjK/zbpRdPWROpwQNbPVBY+o0pulKkAnbYizHEF wVQb1Edg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pxaLE-00D5Kf-2n; Fri, 12 May 2023 21:30:20 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pxaLC-00D5KG-31 for linux-mediatek@lists.infradead.org; Fri, 12 May 2023 21:30:20 +0000 X-UUID: 2e0f3956f10c11ed83ed1395ce914268-20230512 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=RyC+sBrNP9jY0U1et1wYi4MO7UH4FsSyLmrleV55OIc=; b=ZDYToNoQzdgpthB38Zc9NKw3Z4L93/JDBSixMafnMuvDjQBvNPXG1yry+awPg2JalB3hIo+FWVkW1FZeIuUFWSjm4plZ7zvLtjFzgLZZDc6SNihUHvogs97UpZ8gPeqnIfnduO3fWhOwFr40GeFxBrlJLbAXjbxAmmdvqyibeVI=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.24,REQID:bc0bac58-6545-4602-b988-993acd0095a6,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:178d4d4,CLOUDID:0146033b-de1e-4348-bc35-c96f92f1dcbb,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-UUID: 2e0f3956f10c11ed83ed1395ce914268-20230512 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 289182484; Fri, 12 May 2023 14:30:13 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Sat, 13 May 2023 05:20:10 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Sat, 13 May 2023 05:20:10 +0800 From: To: , , CC: , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v6 1/3] Bluetooth: btusb: mediatek: use readx_poll_timeout instead of open coding Date: Sat, 13 May 2023 05:20:07 +0800 Message-ID: X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230512_143019_008134_9DC5F1F9 X-CRM114-Status: GOOD ( 13.56 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: Sean Wang Use readx_poll_timeout instead of open coding to poll the hardware reset status until it is done. Signed-off-by: Sean Wang --- v2: use 20ms as the unit to poll according to the requirement of readx_poll_timeout v3: refine btusb_mtk_reset_done and drop the necessary error check in btusb_mtk_cmd_timeout v4, v5, v6: rebase onto the latest codebase --- drivers/bluetooth/btusb.c | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 2a8e2bb038f5..275e0666503d 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2566,8 +2566,6 @@ static int btusb_setup_realtek(struct hci_dev *hdev) #define MTK_EP_RST_OPT 0x74011890 #define MTK_EP_RST_IN_OUT_OPT 0x00010001 #define MTK_BT_RST_DONE 0x00000100 -#define MTK_BT_RESET_WAIT_MS 100 -#define MTK_BT_RESET_NUM_TRIES 10 static void btusb_mtk_wmt_recv(struct urb *urb) { @@ -2938,6 +2936,16 @@ static int btusb_mtk_id_get(struct btusb_data *data, u32 reg, u32 *id) return btusb_mtk_reg_read(data, reg, id); } +static u32 btusb_mtk_reset_done(struct hci_dev *hdev) +{ + struct btusb_data *data = hci_get_drvdata(hdev); + u32 val = 0; + + btusb_mtk_uhw_reg_read(data, MTK_BT_MISC, &val); + + return val & MTK_BT_RST_DONE; +} + static int btusb_mtk_setup(struct hci_dev *hdev) { struct btusb_data *data = hci_get_drvdata(hdev); @@ -3127,7 +3135,7 @@ static void btusb_mtk_cmd_timeout(struct hci_dev *hdev) { struct btusb_data *data = hci_get_drvdata(hdev); u32 val; - int err, retry = 0; + int err; /* It's MediaTek specific bluetooth reset mechanism via USB */ if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) { @@ -3158,18 +3166,10 @@ static void btusb_mtk_cmd_timeout(struct hci_dev *hdev) btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 0); btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val); - /* Poll the register until reset is completed */ - do { - btusb_mtk_uhw_reg_read(data, MTK_BT_MISC, &val); - if (val & MTK_BT_RST_DONE) { - bt_dev_dbg(hdev, "Bluetooth Reset Successfully"); - break; - } - - bt_dev_dbg(hdev, "Polling Bluetooth Reset CR"); - retry++; - msleep(MTK_BT_RESET_WAIT_MS); - } while (retry < MTK_BT_RESET_NUM_TRIES); + 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"); btusb_mtk_id_get(data, 0x70010200, &val); if (!val)