From patchwork Wed Jul 5 17:19:51 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 784766 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3x2nj202Mrz9s7C for ; Thu, 6 Jul 2017 03:21:26 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="hh20oOeM"; dkim-atps=neutral Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752113AbdGERVY (ORCPT ); Wed, 5 Jul 2017 13:21:24 -0400 Received: from mail-lf0-f65.google.com ([209.85.215.65]:33994 "EHLO mail-lf0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752093AbdGERVU (ORCPT ); Wed, 5 Jul 2017 13:21:20 -0400 Received: by mail-lf0-f65.google.com with SMTP id g21so21599197lfk.1; Wed, 05 Jul 2017 10:21:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=HnXmqSwxGLvnpKGKu839/B0zROd2v0ty3LJ8EyF7xKo=; b=hh20oOeMRaFUIGBpzlo3blwlD3ZuRUudwaEhhFn9Kk1NETOwneIlw4/wszdhD1tXWv sncQVG+5LrSA6SfbQmFVKzd0qZzWHVK3jgXiyDSMQ5VkOVGZTv15Iw4qyh2FP/dzLAG3 tkzhb4Qg3uZZfX2cgdM7JIAJkiO8naU5aPdXxcF44mMs/z8qjnd40iS3JSo3R/yTj7jc Q5YKmuUpBD3pHRMjWr35YH0Z8TEVWDX+gICjgvaXAseX1fc4Zfwu+QV0THpdgW8KcGhj qz+l6EMZ8iEEZ3Cjg0b+kw55osXg3aovRQeH8dxkpVpBUlon9gd/d2+5y265UeniAaoW O19g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=HnXmqSwxGLvnpKGKu839/B0zROd2v0ty3LJ8EyF7xKo=; b=ll2hLysuJAr0umOPVLs9riNeFFNZKAW9Y3psv3EHbcj0xkO0E5tts1eauull5TEQ+x Nh59I17X4sheEd1qPbtlb/Nq4uALRlLwqxgL71V4GKpOIIBtTFyO1cNK5TvstUzIV1Zx ZxsBgiFDljXs5vZJqKS8bOU4pKHUf+TXCfTCdM2J7TIdAJJg4YxXBDlxfJIhh6CyVKet M7VbPMJ3E2dOwSsKMtMSYJItrpHeWv13uJOauSHT9+U7aGhgZTGmqelHDR/168A1Fiht j19xW7hjwfeCOVopQBDqwTDQFhchvktOHCLDQ4ew4pOb3m5ev1kZrR/prRV8SOEG57I7 XjzQ== X-Gm-Message-State: AKS2vOx1O+Pxm9OvLxLSyktDE/m66DmDNMvnD7imAywDOlQmk+etLHUw RpZnTaGosOpJ8g== X-Received: by 10.25.160.66 with SMTP id j63mr14982173lfe.38.1499275278543; Wed, 05 Jul 2017 10:21:18 -0700 (PDT) Received: from localhost.localdomain (ppp109-252-91-87.pppoe.spdop.ru. [109.252.91.87]) by smtp.gmail.com with ESMTPSA id e14sm4664343lji.53.2017.07.05.10.21.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 05 Jul 2017 10:21:17 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Felipe Balbi , Greg Kroah-Hartman , Peter Chen , Jonathan Hunter Cc: Marc Dietrich , Nicolas Chauvet , linux-usb@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH v1 2/9] usb: chipidea: udc: Support SKB alignment quirk Date: Wed, 5 Jul 2017 20:19:51 +0300 Message-Id: <719de7513f42948f5f75742c31f4cc09582411fd.1499273075.git.digetx@gmail.com> X-Mailer: git-send-email 2.13.2 In-Reply-To: References: In-Reply-To: References: Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org NVIDIA Tegra20 UDC can't cope with unaligned DMA and require a USB gadget quirk that avoids SKB buffer alignment to be set in order to make Ethernet Gadget working. Later Tegra generations do not require that quirk. Let's add a new platform data flag that allows to enable USB gadget quirk for platforms that require it. Signed-off-by: Dmitry Osipenko Acked-by: Peter Chen --- drivers/usb/chipidea/udc.c | 3 +++ include/linux/usb/chipidea.h | 1 + 2 files changed, 4 insertions(+) diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index d68b125796f9..404f10513339 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -1899,6 +1899,9 @@ static int udc_start(struct ci_hdrc *ci) ci->gadget.name = ci->platdata->name; ci->gadget.otg_caps = otg_caps; + if (ci->platdata->flags & CI_HDRC_REQUIRES_ALIGNED_DMA) + ci->gadget.quirk_avoids_skb_reserve = 1; + if (ci->is_otg && (otg_caps->hnp_support || otg_caps->srp_support || otg_caps->adp_support)) ci->gadget.is_otg = 1; diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h index c5fdfcf99828..d725cff7268d 100644 --- a/include/linux/usb/chipidea.h +++ b/include/linux/usb/chipidea.h @@ -58,6 +58,7 @@ struct ci_hdrc_platform_data { #define CI_HDRC_OVERRIDE_TX_BURST BIT(10) #define CI_HDRC_OVERRIDE_RX_BURST BIT(11) #define CI_HDRC_OVERRIDE_PHY_CONTROL BIT(12) /* Glue layer manages phy */ +#define CI_HDRC_REQUIRES_ALIGNED_DMA BIT(13) enum usb_dr_mode dr_mode; #define CI_HDRC_CONTROLLER_RESET_EVENT 0 #define CI_HDRC_CONTROLLER_STOPPED_EVENT 1