From patchwork Fri Sep 10 07:36:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neal Liu X-Patchwork-Id: 12484517 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 79816C433EF for ; Fri, 10 Sep 2021 07:36:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5EEB3610C8 for ; Fri, 10 Sep 2021 07:36:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231586AbhIJHiH (ORCPT ); Fri, 10 Sep 2021 03:38:07 -0400 Received: from twspam01.aspeedtech.com ([211.20.114.71]:25319 "EHLO twspam01.aspeedtech.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231290AbhIJHiH (ORCPT ); Fri, 10 Sep 2021 03:38:07 -0400 Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 18A7GoO4001125; Fri, 10 Sep 2021 15:16:50 +0800 (GMT-8) (envelope-from neal_liu@aspeedtech.com) Received: from NealLiu-PC01.aspeedtech.com (192.168.2.78) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 10 Sep 2021 15:36:23 +0800 From: Neal Liu To: Alan Stern , Greg Kroah-Hartman , Tony Prisk , , , CC: Neal Liu , Tao Ren , Subject: [PATCH v4] usb: ehci: handshake CMD_RUN instead of STS_HALT Date: Fri, 10 Sep 2021 15:36:19 +0800 Message-ID: <20210910073619.26095-1-neal_liu@aspeedtech.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [192.168.2.78] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 18A7GoO4001125 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org For Aspeed, HCHalted status depends on not only Run/Stop but also ASS/PSS status. Handshake CMD_RUN on startup instead. Signed-off-by: Neal Liu Acked-by: Alan Stern Reviewed-by: Tao Ren Tested-by: Tao Ren Reviewed-by: Joel Stanley --- drivers/usb/host/ehci-hcd.c | 11 ++++++++++- drivers/usb/host/ehci-platform.c | 6 ++++++ drivers/usb/host/ehci.h | 1 + 3 files changed, 17 insertions(+), 1 deletion(-) --- Fix STS_HALT handshake failure for Aspeed 2500/2600 platform. Change since v3: - Add more description. Change since v2: - Use my "real" name for both the Signed-off-by: line and the From: line. Change since v1: - Handshake CMD_RUN status on startup instead of easily skip it. --- diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 6bdc6d6bf74d..55f92d25336b 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -634,7 +634,16 @@ static int ehci_run (struct usb_hcd *hcd) /* Wait until HC become operational */ ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ msleep(5); - rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, 0, 100 * 1000); + + /* For Aspeed, STS_HALT also depends on ASS/PSS status. + * Check CMD_RUN instead. + */ + if (ehci->is_aspeed) + rc = ehci_handshake(ehci, &ehci->regs->command, CMD_RUN, + 1, 100 * 1000); + else + rc = ehci_handshake(ehci, &ehci->regs->status, STS_HALT, + 0, 100 * 1000); up_write(&ehci_cf_port_reset_rwsem); diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c index c70f2d0b4aaf..c3dc906274d9 100644 --- a/drivers/usb/host/ehci-platform.c +++ b/drivers/usb/host/ehci-platform.c @@ -297,6 +297,12 @@ static int ehci_platform_probe(struct platform_device *dev) "has-transaction-translator")) hcd->has_tt = 1; + if (of_device_is_compatible(dev->dev.of_node, + "aspeed,ast2500-ehci") || + of_device_is_compatible(dev->dev.of_node, + "aspeed,ast2600-ehci")) + ehci->is_aspeed = 1; + if (soc_device_match(quirk_poll_match)) priv->quirk_poll = true; diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index 80bb823aa9fe..fdd073cc053b 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -219,6 +219,7 @@ struct ehci_hcd { /* one per controller */ unsigned need_oc_pp_cycle:1; /* MPC834X port power */ unsigned imx28_write_fix:1; /* For Freescale i.MX28 */ unsigned spurious_oc:1; + unsigned is_aspeed:1; /* required for usb32 quirk */ #define OHCI_CTRL_HCFS (3 << 6)