From patchwork Wed Jan 15 08:55:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rocky Liao X-Patchwork-Id: 197457 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6D1B6C33CB2 for ; Wed, 15 Jan 2020 08:56:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 41E25222C3 for ; Wed, 15 Jan 2020 08:56:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="YOiu1PRC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729182AbgAOI4H (ORCPT ); Wed, 15 Jan 2020 03:56:07 -0500 Received: from mail25.static.mailgun.info ([104.130.122.25]:27710 "EHLO mail25.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729162AbgAOI4F (ORCPT ); Wed, 15 Jan 2020 03:56:05 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1579078565; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=9Mzek4TbadeoYMk/0W+CHntDAT6lGDwJBFpJtzZP33M=; b=YOiu1PRCL7XtFC5fhaDSOwc6+GAD96tCLI6sZMU3bAC3yfxGC/q5/b7bmG0slqdTWNG9Tg48 9/2VgKs7pm6x80LDZ52MhCpfzd4QqR8azvkWmfRg5tmdzWGslVGQg4S5b9iSHTy0F7wkaOSe /4BSoqWhWjlIwcEsjLwtKV9MATU= X-Mailgun-Sending-Ip: 104.130.122.25 X-Mailgun-Sid: WyI2MTA3ZSIsICJsaW51eC1ibHVldG9vdGhAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e1ed3a3.7f4669ab8730-smtp-out-n03; Wed, 15 Jan 2020 08:56:03 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 2B6C9C447A6; Wed, 15 Jan 2020 08:56:02 +0000 (UTC) Received: from rocky-Inspiron-7590.qca.qualcomm.com (unknown [180.166.53.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: rjliao) by smtp.codeaurora.org (Postfix) with ESMTPSA id 0043BC447AC; Wed, 15 Jan 2020 08:55:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 0043BC447AC Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=rjliao@codeaurora.org From: Rocky Liao To: marcel@holtmann.org, johan.hedberg@gmail.com Cc: mka@chromium.org, linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-arm-msm@vger.kernel.org, bgodavar@codeaurora.org, hemantg@codeaurora.org, Rocky Liao Subject: [PATCH v4 2/3] Bluetooth: hci_qca: Retry btsoc initialize when it fails Date: Wed, 15 Jan 2020 16:55:51 +0800 Message-Id: <20200115085552.11483-2-rjliao@codeaurora.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200115085552.11483-1-rjliao@codeaurora.org> References: <20191225060317.5258-1-rjliao@codeaurora.org> <20200115085552.11483-1-rjliao@codeaurora.org> Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org This patch adds the retry of btsoc initialization when it fails. There are reports that the btsoc initialization may fail on some platforms but the repro ratio is very low. The symptoms is the firmware downloading failed due to the UART write timed out. The failure may be caused by UART, platform HW or the btsoc itself but it's very difficlut to root cause, given the repro ratio is very low. Add a retry for the btsoc initialization can work around most of the failures and make Bluetooth finally works. Signed-off-by: Rocky Liao --- Changes in v2: None Changes in v3: None Changes in v4: -rebased the patch with latet code -refined macro and variable name -updated commit message drivers/bluetooth/hci_qca.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index ecb74965be10..1139142e8eed 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -55,6 +55,9 @@ /* Controller debug log header */ #define QCA_DEBUG_HANDLE 0x2EDC +/* max retry count when init fails */ +#define MAX_INIT_RETRIES 3 + /* Controller dump header */ #define QCA_SSR_DUMP_HANDLE 0x0108 #define QCA_DUMP_PACKET_SIZE 255 @@ -1539,6 +1542,7 @@ static int qca_setup(struct hci_uart *hu) struct hci_dev *hdev = hu->hdev; struct qca_data *qca = hu->priv; unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200; + unsigned int retries = 0; enum qca_btsoc_type soc_type = qca_soc_type(hu); const char *firmware_name = qca_get_firmware_name(hu); int ret; @@ -1559,6 +1563,7 @@ static int qca_setup(struct hci_uart *hu) bt_dev_info(hdev, "setting up %s", qca_is_wcn399x(soc_type) ? "wcn399x" : "ROME"); +retry: ret = qca_power_on(hdev); if (ret) return ret; @@ -1613,6 +1618,20 @@ static int qca_setup(struct hci_uart *hu) * patch/nvm-config is found, so run with original fw/config. */ ret = 0; + } else { + if (retries < MAX_INIT_RETRIES) { + qca_power_shutdown(hu); + if (hu->serdev) { + serdev_device_close(hu->serdev); + ret = serdev_device_open(hu->serdev); + if (ret) { + bt_dev_err(hdev, "failed to open port"); + return ret; + } + } + retries++; + goto retry; + } } /* Setup bdaddr */