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Thu, 10 Sep 2020 09:12:25 +0000 From: Peter Chen To: balbi@kernel.org Cc: linux-usb@vger.kernel.org, linux-imx@nxp.com, pawell@cadence.com, rogerq@ti.com, gregkh@linuxfoundation.org, jun.li@nxp.com, Peter Chen Subject: [PATCH v2 4/8] usb: cdns3: gadget: add CHAIN and ISP bit for sg list use case Date: Thu, 10 Sep 2020 17:11:26 +0800 Message-Id: <20200910091130.20937-5-peter.chen@nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200910091130.20937-1-peter.chen@nxp.com> References: <20200910091130.20937-1-peter.chen@nxp.com> Content-Type: text/plain X-ClientProxiedBy: SG2PR06CA0134.apcprd06.prod.outlook.com (2603:1096:1:1f::12) To AM7PR04MB7157.eurprd04.prod.outlook.com (2603:10a6:20b:118::20) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from b29397-desktop.ap.freescale.net (119.31.174.66) by SG2PR06CA0134.apcprd06.prod.outlook.com (2603:1096:1:1f::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3370.16 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 78376ace-9890-481d-203f-08d85569a1d3 X-MS-Exchange-CrossTenant-AuthSource: AM7PR04MB7157.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Sep 2020 09:12:25.0717 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: a/diTPMN2jnaA6Pw4DIls55LHs2QQm3e/E328q3ezpGowcLNirkzy85db7Kb77vQTWTQJq3MIwYpRXRuujUktA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6PR04MB4168 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org For sg buffer list use case, we need to add ISP for each TRB, and add CHAIN bit for each TRB except for the last TRB. Signed-off-by: Peter Chen --- drivers/usb/cdns3/gadget.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c index f1626df65255..1df4ee2857e9 100644 --- a/drivers/usb/cdns3/gadget.c +++ b/drivers/usb/cdns3/gadget.c @@ -1220,8 +1220,14 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep, else priv_req->trb->control = cpu_to_le32(control); - if (sg_supported) + if (sg_supported) { + trb->control |= TRB_ISP; + /* Don't set chain bit for last TRB */ + if (sg_iter < num_trb - 1) + trb->control |= TRB_CHAIN; + s = sg_next(s); + } control = 0; ++sg_iter; -- 2.17.1