From patchwork Tue Jun 2 11:14:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: liulongfang X-Patchwork-Id: 11583621 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 37D9C14F6 for ; Tue, 2 Jun 2020 11:15:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2882B206E2 for ; Tue, 2 Jun 2020 11:15:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725919AbgFBLPT (ORCPT ); Tue, 2 Jun 2020 07:15:19 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:49082 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725802AbgFBLPT (ORCPT ); Tue, 2 Jun 2020 07:15:19 -0400 Received: from DGGEMS401-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 4D2DE3FCE16B86E10F39; Tue, 2 Jun 2020 19:15:17 +0800 (CST) Received: from huawei.com (10.67.165.24) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.487.0; Tue, 2 Jun 2020 19:15:07 +0800 From: Longfang Liu To: CC: , , , Subject: [PATCH] USB: ehci: reopen solution for Synopsys HC bug Date: Tue, 2 Jun 2020 19:14:49 +0800 Message-ID: <1591096489-9586-1-git-send-email-liulongfang@huawei.com> X-Mailer: git-send-email 2.8.1 MIME-Version: 1.0 X-Originating-IP: [10.67.165.24] X-CFilter-Loop: Reflected Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org A Synopsys USB2.0 core used in Huawei Kunpeng920 SoC has a bug which might cause the host controller not issuing ping. The detailed description and solution: Link: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/commit/?id=2f7ac6c199978d0a0e407a12534201aa675a6482 Signed-off-by: Longfang Liu Reviewed-by: Yicong Yang --- drivers/usb/host/ehci-pci.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index 1a48ab1..7ff2cbd 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -216,6 +216,13 @@ static int ehci_pci_setup(struct usb_hcd *hcd) ehci_info(ehci, "applying MosChip frame-index workaround\n"); ehci->frame_index_bug = 1; break; + case PCI_VENDOR_ID_HUAWEI: + /* Synopsys HC bug */ + if (pdev->device == 0xa239) { + ehci_info(ehci, "applying Synopsys HC workaround\n"); + ehci->has_synopsys_hc_bug = 1; + } + break; } /* optional debug port, normally in the first BAR */