From patchwork Thu Jul 14 08:59:20 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: William Wu X-Patchwork-Id: 9229447 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C5A8E6075D for ; Thu, 14 Jul 2016 09:00:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B4CAC25D99 for ; Thu, 14 Jul 2016 09:00:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A948028159; Thu, 14 Jul 2016 09:00:40 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 53BE625D99 for ; Thu, 14 Jul 2016 09:00:40 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bNcVc-0001hO-1p; Thu, 14 Jul 2016 09:00:40 +0000 Received: from regular1.263xmail.com ([211.150.99.135]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bNcVZ-0001bX-TL for linux-rockchip@lists.infradead.org; Thu, 14 Jul 2016 09:00:38 +0000 Received: from william.wu?rock-chips.com (unknown [192.168.167.87]) by regular1.263xmail.com (Postfix) with SMTP id 8979F1E857; Thu, 14 Jul 2016 17:00:09 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 Received: from localhost.localdomain (localhost [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id 7FB66350; Thu, 14 Jul 2016 17:00:03 +0800 (CST) X-RL-SENDER: william.wu@rock-chips.com X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: william.wu@rock-chips.com X-UNIQUE-TAG: <3713e67bb4216ddbf301394df8f131fc> X-ATTACHMENT-NUM: 0 X-SENDER: wulf@rock-chips.com X-DNS-TYPE: 0 Received: from unknown (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith SMTP id 32065YIIUDF; Thu, 14 Jul 2016 17:00:08 +0800 (CST) From: William Wu To: gregkh@linuxfoundation.org, balbi@kernel.org, heiko@sntech.de Subject: [PATCH v7 3/5] usb: dwc3: make usb2 phy utmi interface configurable in DT Date: Thu, 14 Jul 2016 16:59:20 +0800 Message-Id: <1468486762-21960-4-git-send-email-william.wu@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1468486762-21960-1-git-send-email-william.wu@rock-chips.com> References: <1468486762-21960-1-git-send-email-william.wu@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160714_020038_391398_7F7877A0 X-CRM114-Status: GOOD ( 12.11 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: huangtao@rock-chips.com, mark.rutland@arm.com, sergei.shtylyov@cogentembedded.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, kever.yang@rock-chips.com, dianders@google.com, linux-rockchip@lists.infradead.org, robh+dt@kernel.org, eddie.cai@rock-chips.com, William Wu , briannorris@google.com, John.Youn@synopsys.com MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add snps,phyif-utmi-width devicetree property to configure the UTMI+ PHY with an 8- or 16-bit interface. UTMI+ PHY interface is a hardware property, and it's platform dependent. Normally,the PHYIF can be configured during coreconsultant. But for some specific USB cores(e.g. rk3399 SoC DWC3), the default PHYIF configuration value is fault, so we need to reconfigure it by software. And refer to the DWC3 databook, the GUSB2PHYCFG.USBTRDTIM must be set to the corresponding value according to the UTMI+ PHY interface. Signed-off-by: William Wu --- Changes in v7: - remove quirk and use only one property to configure utmi (Heiko, Rob Herring) Changes in v6: - use '-' instead of '_' in dts (Rob Herring) Changes in v5: - None Changes in v4: - rebase on top of balbi testing/next, remove pdata (balbi) Changes in v3: - None Changes in v2: - add a quirk for phyif_utmi (balbi) Documentation/devicetree/bindings/usb/dwc3.txt | 3 +++ drivers/usb/dwc3/core.c | 25 +++++++++++++++++++++++++ drivers/usb/dwc3/core.h | 10 ++++++++++ 3 files changed, 38 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt index 020b0e9..00cc541 100644 --- a/Documentation/devicetree/bindings/usb/dwc3.txt +++ b/Documentation/devicetree/bindings/usb/dwc3.txt @@ -47,6 +47,9 @@ Optional properties: - snps,hird-threshold: HIRD threshold - snps,hsphy_interface: High-Speed PHY interface selection between "utmi" for UTMI+ and "ulpi" for ULPI when the DWC_USB3_HSPHY_INTERFACE has value 3. + - snps,phyif-utmi-width: the value to configure the core to support a UTMI+ PHY + with an 8- or 16-bit interface. Value 8 select 8-bit + interface, value 16 select 16-bit interface. - snps,quirk-frame-length-adjustment: Value for GFLADJ_30MHZ field of GFLADJ register for post-silicon frame length adjustment when the fladj_30mhz_sdbnd signal is invalid or incorrect. diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 0b7bfd2..40c54db 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -408,6 +408,8 @@ static void dwc3_cache_hwparams(struct dwc3 *dwc) static int dwc3_phy_setup(struct dwc3 *dwc) { u32 reg; + u32 usbtrdtim; + u8 phyif; int ret; reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); @@ -503,6 +505,16 @@ static int dwc3_phy_setup(struct dwc3 *dwc) if (dwc->dis_u2_freeclk_exists_quirk) reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS; + if (dwc->phyif_utmi_width > 0) { + reg &= ~(DWC3_GUSB2PHYCFG_PHYIF_MASK | + DWC3_GUSB2PHYCFG_USBTRDTIM_MASK); + usbtrdtim = (dwc->phyif_utmi_width == 16) ? + USBTRDTIM_UTMI_16_BIT : USBTRDTIM_UTMI_8_BIT; + phyif = (dwc->phyif_utmi_width == 16) ? 1 : 0; + reg |= DWC3_GUSB2PHYCFG_PHYIF(phyif) | + DWC3_GUSB2PHYCFG_USBTRDTIM(usbtrdtim); + } + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); return 0; @@ -900,6 +912,19 @@ static int dwc3_probe(struct platform_device *pdev) "snps,is-utmi-l1-suspend"); device_property_read_u8(dev, "snps,hird-threshold", &hird_threshold); + + ret = device_property_read_u8(dev, "snps,phyif-utmi-width", + &dwc->phyif_utmi_width); + if (ret < 0) { + dwc->phyif_utmi_width = 0; + } else if (dwc->phyif_utmi_width != 16 && + dwc->phyif_utmi_width != 8) { + dev_err(dev, "unsupported utmi interface width %d\n", + dwc->phyif_utmi_width); + ret = -EINVAL; + goto err0; + } + dwc->usb3_lpm_capable = device_property_read_bool(dev, "snps,usb3_lpm_capable"); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index f321a5c..99a72c7 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -203,6 +203,12 @@ #define DWC3_GUSB2PHYCFG_SUSPHY (1 << 6) #define DWC3_GUSB2PHYCFG_ULPI_UTMI (1 << 4) #define DWC3_GUSB2PHYCFG_ENBLSLPM (1 << 8) +#define DWC3_GUSB2PHYCFG_PHYIF(n) (n << 3) +#define DWC3_GUSB2PHYCFG_PHYIF_MASK DWC3_GUSB2PHYCFG_PHYIF(1) +#define DWC3_GUSB2PHYCFG_USBTRDTIM(n) (n << 10) +#define DWC3_GUSB2PHYCFG_USBTRDTIM_MASK DWC3_GUSB2PHYCFG_USBTRDTIM(0xf) +#define USBTRDTIM_UTMI_8_BIT 9 +#define USBTRDTIM_UTMI_16_BIT 5 /* Global USB2 PHY Vendor Control Register */ #define DWC3_GUSB2PHYACC_NEWREGREQ (1 << 25) @@ -770,6 +776,9 @@ struct dwc3_scratchpad_array { * @test_mode_nr: test feature selector * @lpm_nyet_threshold: LPM NYET response threshold * @hird_threshold: HIRD threshold + * @phyif_utmi_width: UTMI+ PHY interface width value + * 8 - 8 bits + * 16 - 16 bits * @hsphy_interface: "utmi" or "ulpi" * @connected: true when we're connected to a host, false otherwise * @delayed_status: true when gadget driver asks for delayed status @@ -917,6 +926,7 @@ struct dwc3 { u8 test_mode_nr; u8 lpm_nyet_threshold; u8 hird_threshold; + u8 phyif_utmi_width; const char *hsphy_interface;