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Thu, 8 Aug 2019 09:41:45 +0000 (GMT) From: Marek Szyprowski To: linux-usb@vger.kernel.org, linux-samsung-soc@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Greg Kroah-Hartman , Martin Blumenstingl , Marek Szyprowski , Mathias Nyman , Felipe Balbi , Bartlomiej Zolnierkiewicz , Krzysztof Kozlowski , Jochen Sprickerhof , Anand Moon Subject: [PATCH v2 1/2 RESEND] usb: core: phy: add support for PHY calibration Date: Thu, 8 Aug 2019 11:41:27 +0200 Message-Id: <20190808094128.27213-2-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190808094128.27213-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0VSfyxUcQD39d699+7m2utovlOx3fqxtPwotbeRnWX1zNqsVn8wceWFOOwe J1lNlHFJwmR+5fwI1+GcX0VJmAuLuP6ohmUobChkmR/L89B/n5/fz3fffQlEUiawIUIjohll hDxcionQpu6V/hO+c97+TqZqF6out1ZAdSdP4FRSaS1Gla+PAmpgQI9TppYCjModaDOnSl48 RKiaum84Vd01glPdJT0olWTIFsgs6Nd5Izg9mZGF06Vvps1pgzYVo98V6nA6vUELaH3DBkov Gmx9CF+RWxATHqpilI7ugaIQ03wCFlVqfTtJp0ESwLilGggJSLrArymzqBqICAlZCaCuXY/z ZAnA38ud22QRwOHVAnSnUjSkQ3ijAsDlmSJkt5LXUgW4FEY6Q/WsGuOwFSmDZeXDGBdCyFYE vl2Z2zIsSR+Yv7yOcxglD8PSRzNbupg8C6fSCwE/Zwdf6tsRDgtJdziVUAy4gyCpxWHNeI05 H/KEDxYGER5bwhljA87jA7AvKw3lC0kAjvVX4zxJA9CUmLs94Qo7jYMCNSA273cM1rY48rIH rEhNxTkZknvgl9m9nIxswsymZwgvi2FKsoRPH4F5xprd2fefhrYjNOzVHOJkCfl08xmfUBnA Lu//VDEAWmDNxLCKYIY9FcHEOrByBRsTEexwI1JhAJt/p2/D+OcVaFu73gFIAkgtxB96vf0l ArmKjVN0AEggUivxqMrLXyIOksfdYZSRAcqYcIbtAPsJVGotjjf77ichg+XRTBjDRDHKHdec ENokgKrAsueabF+DqrX3Zo+Z24+x6e5LUuygd6ZfQMzFu4Wj1P2cMFc2cEKzZn+rZOmKbf3V +MZmr3mhp+joar7o/MnmjfrYwZzsz7KMoHOr62fuySzwVhRtnPHrypJfe1xQGfLzgqVCOfrR MXJh8PhQbWri6cm6fU6TYUN/PeKnfl1GpSgbIne2R5Ss/B++aANSNwMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpjkeLIzCtJLcpLzFFi42I5/e/4Xd3Id96xBou22FhsnLGe1eJY2xN2 i+bF69kslv69x2hx/vwGdovLu+awWcw4v4/JYtGyVmaLdRtvsVusPXKX3eLYopMsFs2bprA6 8HjsnHWX3ePphMnsHov3vGTy2LSqk81j/9w17B59W1YxemzY8o/F4/MmuQCOKD2bovzSklSF jPziElulaEMLIz1DSws9IxNLPUNj81grI1MlfTublNSczLLUIn27BL2My+8b2AoWi1c0r1nI 3MD4WLiLkZNDQsBEYt6lNcxdjFwcQgJLGSV2XL/IApGQkTg5rYEVwhaW+HOtiw2i6BOjRMPX 84wgCTYBQ4mutyAJTg4RASeJzrWnwYqYBQ4yS1y8uJcdJCEs4Cdx7tlnsAYWAVWJxd2vwBp4 BWwlXvTNZYTYIC+xesMBZhCbU8BO4kXDArC4EFDN731tLBMY+RYwMqxiFEktLc5Nzy021CtO zC0uzUvXS87P3cQIjINtx35u3sF4aWPwIUYBDkYlHt6CE96xQqyJZcWVuYcYJTiYlUR475V5 xgrxpiRWVqUW5ccXleakFh9iNAU6aiKzlGhyPjBG80riDU0NzS0sDc2NzY3NLJTEeTsEDsYI CaQnlqRmp6YWpBbB9DFxcEo1ME59GjphlexLYd6G1lUcXnp7bvU4b9HW9DD7/UzzAdfiJRO4 GfdMadjT0y8qe+pidkk/f8G14x91C7oUQ/ddPnJ9bZABa+CUgmhPZYHEA4Xm+1xsFvw70b+7 L753UqWswdKaaW5rt0dOWeV6cYKFTjfHHeXpqcXT0kU9/pZddP6y/Xio1vWnS5RYijMSDbWY i4oTATajDFCZAgAA X-CMS-MailID: 20190808094146eucas1p2a5a88ce5e7a87d47c4bcececab4df9a5 X-Msg-Generator: CA X-RootMTR: 20190808094146eucas1p2a5a88ce5e7a87d47c4bcececab4df9a5 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20190808094146eucas1p2a5a88ce5e7a87d47c4bcececab4df9a5 References: <20190808094128.27213-1-m.szyprowski@samsung.com> Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some PHYs (for example Exynos5 USB3.0 DRD PHY) require calibration to be done after every USB HCD reset. Generic PHY framework has been already extended with phy_calibrate() function in commit 36914111e682 ("drivers: phy: add calibrate method"). This patch adds support for it to generic PHY handling code in USB HCD core. Signed-off-by: Marek Szyprowski Tested-by: Anand Moon Tested-by: Jochen Sprickerhof --- drivers/usb/core/hcd.c | 7 +++++++ drivers/usb/core/phy.c | 21 +++++++++++++++++++++ drivers/usb/core/phy.h | 1 + 3 files changed, 29 insertions(+) diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 88533938ce19..b89936c1df23 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -2291,6 +2291,9 @@ int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) hcd->state = HC_STATE_RESUMING; status = hcd->driver->bus_resume(hcd); clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); + if (status == 0) + status = usb_phy_roothub_calibrate(hcd->phy_roothub); + if (status == 0) { struct usb_device *udev; int port1; @@ -2864,6 +2867,10 @@ int usb_add_hcd(struct usb_hcd *hcd, } hcd->rh_pollable = 1; + retval = usb_phy_roothub_calibrate(hcd->phy_roothub); + if (retval) + goto err_hcd_driver_setup; + /* NOTE: root hub and controller capabilities may not be the same */ if (device_can_wakeup(hcd->self.controller) && device_can_wakeup(&hcd->self.root_hub->dev)) diff --git a/drivers/usb/core/phy.c b/drivers/usb/core/phy.c index 7580493b867a..fb1588e7c282 100644 --- a/drivers/usb/core/phy.c +++ b/drivers/usb/core/phy.c @@ -151,6 +151,27 @@ int usb_phy_roothub_set_mode(struct usb_phy_roothub *phy_roothub, } EXPORT_SYMBOL_GPL(usb_phy_roothub_set_mode); +int usb_phy_roothub_calibrate(struct usb_phy_roothub *phy_roothub) +{ + struct usb_phy_roothub *roothub_entry; + struct list_head *head; + int err; + + if (!phy_roothub) + return 0; + + head = &phy_roothub->list; + + list_for_each_entry(roothub_entry, head, list) { + err = phy_calibrate(roothub_entry->phy); + if (err) + return err; + } + + return 0; +} +EXPORT_SYMBOL_GPL(usb_phy_roothub_calibrate); + int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub) { struct usb_phy_roothub *roothub_entry; diff --git a/drivers/usb/core/phy.h b/drivers/usb/core/phy.h index dad564e2d2d4..20a267cd986b 100644 --- a/drivers/usb/core/phy.h +++ b/drivers/usb/core/phy.h @@ -18,6 +18,7 @@ int usb_phy_roothub_exit(struct usb_phy_roothub *phy_roothub); int usb_phy_roothub_set_mode(struct usb_phy_roothub *phy_roothub, enum phy_mode mode); +int usb_phy_roothub_calibrate(struct usb_phy_roothub *phy_roothub); int usb_phy_roothub_power_on(struct usb_phy_roothub *phy_roothub); void usb_phy_roothub_power_off(struct usb_phy_roothub *phy_roothub); 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Thu, 8 Aug 2019 09:41:45 +0000 (GMT) From: Marek Szyprowski To: linux-usb@vger.kernel.org, linux-samsung-soc@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Greg Kroah-Hartman , Martin Blumenstingl , Marek Szyprowski , Mathias Nyman , Felipe Balbi , Bartlomiej Zolnierkiewicz , Krzysztof Kozlowski , Jochen Sprickerhof , Anand Moon Subject: [PATCH v2 2/2 RESEND] usb: dwc3: remove generic PHY calibrate() calls Date: Thu, 8 Aug 2019 11:41:28 +0200 Message-Id: <20190808094128.27213-3-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190808094128.27213-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrCKsWRmVeSWpSXmKPExsWy7djP87rR77xjDQ5OFrPYOGM9q8Wxtifs Fs2L17NZLP17j9Hi/PkN7BaXd81hs5hxfh+TxaJlrcwW6zbeYrdYe+Quu8WxRSdZLJo3TWF1 4PHYOesuu8fTCZPZPRbvecnksWlVJ5vH/rlr2D36tqxi9Niw5R+Lx+dNcgEcUVw2Kak5mWWp Rfp2CVwZk/7OZC5o466YdbaXtYFxGWcXIyeHhICJxJsZ81m7GLk4hARWMEq8PnqTGSQhJPCF UeLXmlKIxGdGiX131rLAdCz9u4oFomg5o8S6T6oQRUANqw9+YQdJsAkYSnS97WIDsUUEHCSW LL3DBlLELLCbWWLvz3dgCWGBAIn1MxrB1rEIqEo8eL4SbCqvgK3En0eb2SC2yUus3nAArIZT wE7iRcMCRpBBEgKr2CV2dG1kgihykXi8aD47hC0s8er4FihbRuL/zvlMEA3NjBIPz61lh3B6 GCUuN81ghKiyljh8/CIwCDiA7tOUWL9LHyLsKDHtzTp2kLCEAJ/EjbeCIGFmIHPStunMEGFe iY42IYhqNYlZx9fBrT144RIzhO0hMfXyamZICE1klJg9Zy/rBEb5WQjLFjAyrmIUTy0tzk1P LTbOSy3XK07MLS7NS9dLzs/dxAhMO6f/Hf+6g3Hfn6RDjAIcjEo8vCdOeccKsSaWFVfmHmKU 4GBWEuG9V+YZK8SbklhZlVqUH19UmpNafIhRmoNFSZy3muFBtJBAemJJanZqakFqEUyWiYNT qoHxpmVKhirL8etBWTs/cLnpek3mOfmm3CY7cPEbf733llPKMiQu8CuHGeo6Tkt+dnQnqyC3 jynjc8W1tXbnjjw0Mq6wkEtN3W61u8bKtP38vu9vNm3WflDMNrfyULiP7N0t2bt0PkVI7Ns0 7clVhj4Zb+kM/x21r75Nt+3cfO21doX2WnP947lKLMUZiYZazEXFiQAQWEAnNwMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpjkeLIzCtJLcpLzFFi42I5/e/4Xd2od96xBlMbFS02zljPanGs7Qm7 RfPi9WwWS//eY7Q4f34Du8XlXXPYLGac38dksWhZK7PFuo232C3WHrnLbnFs0UkWi+ZNU1gd eDx2zrrL7vF0wmR2j8V7XjJ5bFrVyeaxf+4ado++LasYPTZs+cfi8XmTXABHlJ5NUX5pSapC Rn5xia1StKGFkZ6hpYWekYmlnqGxeayVkamSvp1NSmpOZllqkb5dgl7GpL8zmQvauCtmne1l bWBcxtnFyMkhIWAisfTvKpYuRi4OIYGljBI/v+5hg0jISJyc1sAKYQtL/LnWxQZR9IlR4vPf FnaQBJuAoUTX2y6wBhEBJ4nOtafBipgFDjJLXLy4F6xIWMBPYuejRrBJLAKqEg+er2QBsXkF bCX+PNoMtU1eYvWGA8wgNqeAncSLhgWMILYQUM3vfW0sExj5FjAyrGIUSS0tzk3PLTbSK07M LS7NS9dLzs/dxAiMg23Hfm7Zwdj1LvgQowAHoxIPb8EJ71gh1sSy4srcQ4wSHMxKIrz3yjxj hXhTEiurUovy44tKc1KLDzGaAh01kVlKNDkfGKN5JfGGpobmFpaG5sbmxmYWSuK8HQIHY4QE 0hNLUrNTUwtSi2D6mDg4pRoY97CmXNUWPvVn3tkodhaXsqD/2szGAtxvtzQfq66Y7z4nhOOz xNXVxVtnFjzUjbW7PFsn4ugH4xixAuPa+R88LFPSju+J6qgufuMTumdRf/DkbfKdux+82zGd 6cT7hBlT5tm97W18XqfIvzdz1oqVuZ5RTy/tTw79+Sn0tXvbreUl0jb7F5U9UWIpzkg01GIu Kk4EABIURCCZAgAA X-CMS-MailID: 20190808094146eucas1p27c673846a5a9be0c55f1f87c89af4adf X-Msg-Generator: CA X-RootMTR: 20190808094146eucas1p27c673846a5a9be0c55f1f87c89af4adf X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20190808094146eucas1p27c673846a5a9be0c55f1f87c89af4adf References: <20190808094128.27213-1-m.szyprowski@samsung.com> Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Calls to USB2 generic PHY calibrate() method has been moved to HCD core, which now successfully handles generic PHYs and their calibration after every HCD reset. This fixes all the timing issues related to PHY calibration done directly from DWC3 driver: incorrect operation after system suspend/resume or USB3.0 detection failure when XHCI-plat driver compiled as separate module. Signed-off-by: Marek Szyprowski Tested-by: Anand Moon Tested-by: Jochen Sprickerhof Acked-by: Felipe Balbi --- drivers/usb/dwc3/core.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index c9bb93a2c81e..7dd6d419254d 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -168,7 +168,6 @@ static void __dwc3_set_mode(struct work_struct *work) otg_set_vbus(dwc->usb2_phy->otg, true); phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST); phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST); - phy_calibrate(dwc->usb2_generic_phy); } break; case DWC3_GCTL_PRTCAP_DEVICE: @@ -1166,7 +1165,6 @@ static int dwc3_core_init_mode(struct dwc3 *dwc) dev_err(dev, "failed to initialize host\n"); return ret; } - phy_calibrate(dwc->usb2_generic_phy); break; case USB_DR_MODE_OTG: INIT_WORK(&dwc->drd_work, __dwc3_set_mode);