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Thu, 26 Jul 2018 06:09:01 -0700 Received: from [127.0.0.1] (helo=localhost) by xsj-pvapsmtp01 with smtp (Exim 4.63) (envelope-from ) id 1fig0m-0002AF-Pf; Thu, 26 Jul 2018 06:08:56 -0700 Received: from xsj-pvapsmtp01 (smtp3.xilinx.com [149.199.38.66]) by xsj-smtp-dlp2.xlnx.xilinx.com (8.13.8/8.13.1) with ESMTP id w6QD8oOO028514; Thu, 26 Jul 2018 06:08:50 -0700 Received: from [172.23.64.8] (helo=xhdvnc108.xilinx.com) by xsj-pvapsmtp01 with esmtp (Exim 4.63) (envelope-from ) id 1fig0f-00029b-O0; Thu, 26 Jul 2018 06:08:49 -0700 Received: by xhdvnc108.xilinx.com (Postfix, from userid 15427) id DFC9A604BF; Thu, 26 Jul 2018 18:38:48 +0530 (IST) From: Anurag Kumar Vulisha To: , CC: , , , Anurag Kumar Vulisha Subject: [PATCH v3] usb: dwc3: core: Add quirk for enabling AutoRetry feature in the controller Date: Thu, 26 Jul 2018 18:38:48 +0530 Message-ID: <1532610528-7290-1-git-send-email-anurag.kumar.vulisha@xilinx.com> X-Mailer: git-send-email 2.1.1 X-RCIS-Action: ALLOW X-TM-AS-Product-Ver: IMSS-7.1.0.1224-8.2.0.1013-23620.005 X-TM-AS-User-Approved-Sender: Yes;Yes X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:149.199.60.100;IPV:NLI;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10009020)(39860400002)(346002)(396003)(376002)(136003)(2980300002)(438002)(189003)(199004)(426003)(90966002)(63266004)(478600001)(50226002)(8936002)(336012)(551934003)(36386004)(50466002)(48376002)(36756003)(4326008)(39060400002)(110136005)(2906002)(476003)(486006)(6266002)(54906003)(126002)(16586007)(42186006)(103686004)(47776003)(2616005)(107886003)(356003)(316002)(5660300001)(575784001)(106002)(51416003)(8676002)(81166006)(106466001)(186003)(26005)(81156014)(305945005)(52956003)(107986001)(5001870100001);DIR:OUT;SFP:1101;SCL:1;SRVR:BL0PR02MB4452;H:xsj-pvapsmtpgw02;FPR:;SPF:Pass;LANG:en;PTR:unknown-60-100.xilinx.com,xapps1.xilinx.com;MX:1;A:1; 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Enabling this Auto Retry feature in controller, on seeing any transaction errors makes the core to send a non-terminating ACK transaction packet (that is, ACK TP with Retry=1 and Nump != 0). Doing so will give controller a chance to recover from the error condition. Signed-off-by: Anurag Kumar Vulisha --- Changes in v3: 1. As suggested by Felipe, added OTG related check 2. Corrected the multi-line commenting format Changes in v2: 1. As suggested by Rob Herring & Felipe Balbi removed the quirk logic and setting the AutoRetry bits unconditionally for hostmode --- drivers/usb/dwc3/core.c | 16 ++++++++++++++++ drivers/usb/dwc3/core.h | 3 +++ 2 files changed, 19 insertions(+) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 1038075..bc9e33c 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -883,6 +883,22 @@ static int dwc3_core_init(struct dwc3 *dwc) dwc3_writel(dwc->regs, DWC3_GUCTL1, reg); } + if (dwc->dr_mode == USB_DR_MODE_HOST || + dwc->dr_mode == USB_DR_MODE_OTG) { + reg = dwc3_readl(dwc->regs, DWC3_GUCTL); + + /* + * Enable Auto retry Feature to make the controller operating in + * Host mode on seeing transaction errors(CRC errors or internal + * overrun scenerios) on IN transfers to reply to the device + * with a non-terminating retry ACK (i.e, an ACK transcation + * packet with Retry=1 & Nump != 0) + */ + reg |= DWC3_GUCTL_HSTINAUTORETRY; + + dwc3_writel(dwc->regs, DWC3_GUCTL, reg); + } + /* * Must config both number of packets and max burst settings to enable * RX and/or TX threshold. diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 285ce0e..92a1077 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -227,6 +227,9 @@ #define DWC3_GCTL_GBLHIBERNATIONEN BIT(1) #define DWC3_GCTL_DSBLCLKGTNG BIT(0) +/* Global User Control Register */ +#define DWC3_GUCTL_HSTINAUTORETRY BIT(14) + /* Global User Control 1 Register */ #define DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS BIT(28) #define DWC3_GUCTL1_DEV_L1_EXIT_BY_HW BIT(24) -- 2.1.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: [v3] usb: dwc3: core: Add quirk for enabling AutoRetry feature in the controller From: Anurag Kumar Vulisha Message-Id: <1532610528-7290-1-git-send-email-anurag.kumar.vulisha@xilinx.com> Date: Thu, 26 Jul 2018 18:38:48 +0530 To: balbi@kernel.org, gregkh@linuxfoundation.org Cc: v.anuragkumar@gmail.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Anurag Kumar Vulisha List-ID: QnkgZGVmYXVsdCB3aGVuIGNvcmUgc2VlcyBhbnkgdHJhbnNhY3Rpb24gZXJyb3IoQ1JDIG9yIG92 ZXJmbG93KQppdCByZXBsaWVzIHdpdGggdGVybWluYXRpbmcgcmV0cnkgQUNLIChSZXRyeT0xIGFu ZCBOdW1wID09IDApLgpFbmFibGluZyB0aGlzIEF1dG8gUmV0cnkgZmVhdHVyZSBpbiBjb250cm9s bGVyLCBvbiBzZWVpbmcgYW55CnRyYW5zYWN0aW9uIGVycm9ycyBtYWtlcyB0aGUgY29yZSB0byBz ZW5kIGEgbm9uLXRlcm1pbmF0aW5nIEFDSwp0cmFuc2FjdGlvbiBwYWNrZXQgKHRoYXQgaXMsIEFD SyBUUCB3aXRoIFJldHJ5PTEgYW5kIE51bXAgIT0gMCkuCkRvaW5nIHNvIHdpbGwgZ2l2ZSBjb250 cm9sbGVyIGEgY2hhbmNlIHRvIHJlY292ZXIgZnJvbSB0aGUgZXJyb3IKY29uZGl0aW9uLgoKU2ln bmVkLW9mZi1ieTogQW51cmFnIEt1bWFyIFZ1bGlzaGEgPGFudXJhZy5rdW1hci52dWxpc2hhQHhp bGlueC5jb20+Ci0tLQogQ2hhbmdlcyBpbiB2MzoKCTEuIEFzIHN1Z2dlc3RlZCBieSBGZWxpcGUs IGFkZGVkIE9URyByZWxhdGVkIGNoZWNrCgkyLiBDb3JyZWN0ZWQgdGhlIG11bHRpLWxpbmUgY29t bWVudGluZyBmb3JtYXQKCiBDaGFuZ2VzIGluIHYyOgoJMS4gQXMgc3VnZ2VzdGVkIGJ5IFJvYiBI ZXJyaW5nICYgRmVsaXBlIEJhbGJpIHJlbW92ZWQgdGhlCgkgICBxdWlyayBsb2dpYyBhbmQgc2V0 dGluZyB0aGUgQXV0b1JldHJ5IGJpdHMgdW5jb25kaXRpb25hbGx5CgkgICBmb3IgaG9zdG1vZGUK LS0tCiBkcml2ZXJzL3VzYi9kd2MzL2NvcmUuYyB8IDE2ICsrKysrKysrKysrKysrKysKIGRyaXZl cnMvdXNiL2R3YzMvY29yZS5oIHwgIDMgKysrCiAyIGZpbGVzIGNoYW5nZWQsIDE5IGluc2VydGlv bnMoKykKCmRpZmYgLS1naXQgYS9kcml2ZXJzL3VzYi9kd2MzL2NvcmUuYyBiL2RyaXZlcnMvdXNi L2R3YzMvY29yZS5jCmluZGV4IDEwMzgwNzUuLmJjOWUzM2MgMTAwNjQ0Ci0tLSBhL2RyaXZlcnMv dXNiL2R3YzMvY29yZS5jCisrKyBiL2RyaXZlcnMvdXNiL2R3YzMvY29yZS5jCkBAIC04ODMsNiAr ODgzLDIyIEBAIHN0YXRpYyBpbnQgZHdjM19jb3JlX2luaXQoc3RydWN0IGR3YzMgKmR3YykKIAkJ ZHdjM193cml0ZWwoZHdjLT5yZWdzLCBEV0MzX0dVQ1RMMSwgcmVnKTsKIAl9CiAKKwlpZiAoZHdj LT5kcl9tb2RlID09IFVTQl9EUl9NT0RFX0hPU1QgfHwKKwkgICAgZHdjLT5kcl9tb2RlID09IFVT Ql9EUl9NT0RFX09URykgeworCQlyZWcgPSBkd2MzX3JlYWRsKGR3Yy0+cmVncywgRFdDM19HVUNU TCk7CisKKwkJLyoKKwkJICogRW5hYmxlIEF1dG8gcmV0cnkgRmVhdHVyZSB0byBtYWtlIHRoZSBj b250cm9sbGVyIG9wZXJhdGluZyBpbgorCQkgKiBIb3N0IG1vZGUgb24gc2VlaW5nIHRyYW5zYWN0 aW9uIGVycm9ycyhDUkMgZXJyb3JzIG9yIGludGVybmFsCisJCSAqIG92ZXJydW4gc2NlbmVyaW9z KSBvbiBJTiB0cmFuc2ZlcnMgdG8gcmVwbHkgdG8gdGhlIGRldmljZQorCQkgKiB3aXRoIGEgbm9u LXRlcm1pbmF0aW5nIHJldHJ5IEFDSyAoaS5lLCBhbiBBQ0sgdHJhbnNjYXRpb24KKwkJICogcGFj a2V0IHdpdGggUmV0cnk9MSAmIE51bXAgIT0gMCkKKwkJICovCisJCXJlZyB8PSBEV0MzX0dVQ1RM X0hTVElOQVVUT1JFVFJZOworCisJCWR3YzNfd3JpdGVsKGR3Yy0+cmVncywgRFdDM19HVUNUTCwg cmVnKTsKKwl9CisKIAkvKgogCSAqIE11c3QgY29uZmlnIGJvdGggbnVtYmVyIG9mIHBhY2tldHMg YW5kIG1heCBidXJzdCBzZXR0aW5ncyB0byBlbmFibGUKIAkgKiBSWCBhbmQvb3IgVFggdGhyZXNo b2xkLgpkaWZmIC0tZ2l0IGEvZHJpdmVycy91c2IvZHdjMy9jb3JlLmggYi9kcml2ZXJzL3VzYi9k d2MzL2NvcmUuaAppbmRleCAyODVjZTBlLi45MmExMDc3IDEwMDY0NAotLS0gYS9kcml2ZXJzL3Vz Yi9kd2MzL2NvcmUuaAorKysgYi9kcml2ZXJzL3VzYi9kd2MzL2NvcmUuaApAQCAtMjI3LDYgKzIy Nyw5IEBACiAjZGVmaW5lIERXQzNfR0NUTF9HQkxISUJFUk5BVElPTkVOCUJJVCgxKQogI2RlZmlu ZSBEV0MzX0dDVExfRFNCTENMS0dUTkcJCUJJVCgwKQogCisvKiBHbG9iYWwgVXNlciBDb250cm9s IFJlZ2lzdGVyICovCisjZGVmaW5lIERXQzNfR1VDVExfSFNUSU5BVVRPUkVUUlkJQklUKDE0KQor CiAvKiBHbG9iYWwgVXNlciBDb250cm9sIDEgUmVnaXN0ZXIgKi8KICNkZWZpbmUgRFdDM19HVUNU TDFfVFhfSVBHQVBfTElORUNIRUNLX0RJUwlCSVQoMjgpCiAjZGVmaW5lIERXQzNfR1VDVEwxX0RF Vl9MMV9FWElUX0JZX0hXCUJJVCgyNCkK