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[109.252.55.77]) by smtp.gmail.com with ESMTPSA id c64sm759986lfc.4.2017.08.09.05.19.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 09 Aug 2017 05:19:57 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Felipe Balbi , Greg Kroah-Hartman , Peter Chen , Jonathan Hunter , Stephen Warren Cc: Marc Dietrich , Nicolas Chauvet , =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= , linux-usb@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH v5 2/8] usb: chipidea: udc: Support SKB alignment quirk Date: Wed, 9 Aug 2017 15:19:28 +0300 Message-Id: X-Mailer: git-send-email 2.13.3 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 6502c13331e8..fe8a90543ea3 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -1896,6 +1896,9 @@ 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