From patchwork Tue Apr 16 22:45:38 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergei Shtylyov X-Patchwork-Id: 2451411 Return-Path: X-Original-To: patchwork-linux-sh@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id DBD62DF230 for ; Tue, 16 Apr 2013 22:46:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965542Ab3DPWqb (ORCPT ); Tue, 16 Apr 2013 18:46:31 -0400 Received: from mail-lb0-f182.google.com ([209.85.217.182]:42072 "EHLO mail-lb0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965529Ab3DPWqa (ORCPT ); Tue, 16 Apr 2013 18:46:30 -0400 Received: by mail-lb0-f182.google.com with SMTP id z13so1049005lbh.27 for ; Tue, 16 Apr 2013 15:46:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-received:from:organization:to:subject:date:user-agent:cc :references:in-reply-to:mime-version:content-type :content-transfer-encoding:message-id:x-gm-message-state; bh=aIOcznj+W2BihJ/aUG9i9leqQfb6S/9CtTcRD6casI8=; b=AuCBQvSEoBr/bU734IrMISsnHnCwX8/i1/TUNzvx5cxW2GDr+44JChZjtowRNQCV5k EFM8HUWfqSXIXoXa//fzR5cFauWecAOUCCKYc1QFKy3u4PNHLkD7eE205s1XIBYLGj4U +As2gendlpSIahrzPW2tar0v2W0xzrIIkOO5/3TkOm61RYBs/MXFMGGmOu5FyOdShN4E z0znfRpIuwWf0fo0WdnDxlmr5k+yD1Ut7yA/M0r9BSltEb8bBrwQqjzm4CAY9L+Whj1A S3tn9qUrSChwI+YE+WAMDxmqOq2/Oval5WqMsh3V57jb4wuH7OxgHDq3MGSp7BpEY5dh oG8w== X-Received: by 10.112.133.72 with SMTP id pa8mr2360632lbb.114.1366152388793; Tue, 16 Apr 2013 15:46:28 -0700 (PDT) Received: from wasted.dev.rtsoft.ru (ppp91-79-82-36.pppoe.mtu-net.ru. [91.79.82.36]) by mx.google.com with ESMTPS id c7sm1603459lbe.6.2013.04.16.15.46.26 (version=TLSv1 cipher=RC4-SHA bits=128/128); Tue, 16 Apr 2013 15:46:27 -0700 (PDT) From: Sergei Shtylyov Organization: Cogent Embedded To: linux-usb@vger.kernel.org Subject: [PATCH v3.1 1/4] rcar-phy: add R8A7778 support Date: Wed, 17 Apr 2013 02:45:38 +0400 User-Agent: KMail/1.13.5 (Linux/2.6.32.26-175.fc12.i686.PAE; KDE/4.4.5; i686; ; ) Cc: gregkh@linuxfoundation.org, balbi@ti.com, linux-sh@vger.kernel.org References: <201304170132.43232.sergei.shtylyov@cogentembedded.com> In-Reply-To: <201304170132.43232.sergei.shtylyov@cogentembedded.com> MIME-Version: 1.0 Message-Id: <201304170245.38987.sergei.shtylyov@cogentembedded.com> X-Gm-Message-State: ALoCoQlnuGOwRsU5pZbV0S4WN9NECY9hZs0jmIoW2dQgemMLKmXU99zCHMpgB+jNY1dGyCBTfROh Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org The driver currently only supports R8A7779 SoC. Compared to it, R8A7778 USB-PHY has extra register range containing two high-speed signal quality characteristic control registers which should be set up during USB-PHY startup depending on whether a ferrite bead is in use or not. So, we now handle an optional second memory range in the driver's probe method, add the 'ferrite_bead' field to the driver's platform data, and add an extra (optional) step to the USB-PHY startup routine which sets up the extended registers. Also mark in the driver's Kconfig section that R8A7778 is now supported and generally clarify that section, uppercasing the word "phy", while at it... The patch has been tested on the Marzen and BOCK-W boards. Signed-off-by: Sergei Shtylyov Acked-by: Felipe Balbi --- Changes since version 3: - removed stray debugging printk() call. Changes since version 2: - moved 'ferrite_bead' bitfield to the start of 'struct rcar_phy_platform_data' which allowed to cut the size of the structure from 8 bytes back to 4; - added a comment about only 2 USB ports on R8A7778' - added an ACK from Felipe Balbi. Changes since the original posting: - made the necessary changes atop of the R8A7779/Marzen pathset version 4. drivers/usb/phy/Kconfig | 8 ++++---- drivers/usb/phy/rcar-phy.c | 37 +++++++++++++++++++++++++++++++------ include/linux/usb/rcar-phy.h | 4 +++- 3 files changed, 38 insertions(+), 11 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-sh" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: renesas/drivers/usb/phy/Kconfig =================================================================== --- renesas.orig/drivers/usb/phy/Kconfig +++ renesas/drivers/usb/phy/Kconfig @@ -55,13 +55,13 @@ config MV_U3D_PHY SoC. config USB_RCAR_PHY - tristate "Renesas R-Car USB phy support" + tristate "Renesas R-Car USB PHY support" depends on USB || USB_GADGET select USB_OTG_UTILS help - Say Y here to add support for the Renesas R-Car USB phy driver. - This chip is typically used as USB phy for USB host, gadget. - This driver supports: R8A7779 + Say Y here to add support for the Renesas R-Car USB common PHY driver. + This device is typically used as USB PHY for USB host, gadget. + This driver supports R8A7778 and R8A7779. To compile this driver as a module, choose M here: the module will be called rcar-phy. Index: renesas/drivers/usb/phy/rcar-phy.c =================================================================== --- renesas.orig/drivers/usb/phy/rcar-phy.c +++ renesas/drivers/usb/phy/rcar-phy.c @@ -26,15 +26,21 @@ #define USBOH0 0x1C #define USBCTL0 0x58 +/* High-speed signal quality characteristic control registers (R8A7778 only) */ +#define HSQCTL1 0x24 +#define HSQCTL2 0x28 + /* USBPCTRL0 */ -#define OVC2 (1 << 10) /* Switches the OVC input pin for port 2: */ +#define OVC2 (1 << 10) /* (R8A7779 only) */ + /* Switches the OVC input pin for port 2: */ /* 1: USB_OVC2, 0: OVC2 */ #define OVC1_VBUS1 (1 << 9) /* Switches the OVC input pin for port 1: */ /* 1: USB_OVC1, 0: OVC1/VBUS1 */ /* Function mode: set to 0 */ #define OVC0 (1 << 8) /* Switches the OVC input pin for port 0: */ /* 1: USB_OVC0 pin, 0: OVC0 */ -#define OVC2_ACT (1 << 6) /* Host mode: OVC2 polarity: */ +#define OVC2_ACT (1 << 6) /* (R8A7779 only) */ + /* Host mode: OVC2 polarity: */ /* 1: active-high, 0: active-low */ #define PENC (1 << 4) /* Function mode: output level of PENC1 pin: */ /* 1: high, 0: low */ @@ -59,6 +65,7 @@ struct rcar_usb_phy_priv { spinlock_t lock; void __iomem *reg0; + void __iomem *reg1; int counter; }; @@ -78,6 +85,7 @@ static int rcar_usb_phy_init(struct usb_ struct device *dev = phy->dev; struct rcar_phy_platform_data *pdata = dev->platform_data; void __iomem *reg0 = priv->reg0; + void __iomem *reg1 = priv->reg1; const u8 ovcn_act[] = { OVC0_ACT, OVC1_ACT, OVC2_ACT }; int i; u32 val; @@ -96,7 +104,16 @@ static int rcar_usb_phy_init(struct usb_ /* (2) start USB-PHY internal PLL */ iowrite32(PHY_ENB | PLL_ENB, (reg0 + USBPCTRL1)); - /* (3) USB module status check */ + /* (3) set USB-PHY in accord with the conditions of usage */ + if (reg1) { + u32 hsqctl1 = pdata->ferrite_bead ? 0x41 : 0; + u32 hsqctl2 = pdata->ferrite_bead ? 0x0d : 7; + + iowrite32(hsqctl1, reg1 + HSQCTL1); + iowrite32(hsqctl2, reg1 + HSQCTL2); + } + + /* (4) USB module status check */ for (i = 0; i < 1024; i++) { udelay(10); val = ioread32(reg0 + USBST); @@ -109,7 +126,7 @@ static int rcar_usb_phy_init(struct usb_ goto phy_init_end; } - /* (4) USB-PHY reset clear */ + /* (5) USB-PHY reset clear */ iowrite32(PHY_ENB | PLL_ENB | PHY_RST, (reg0 + USBPCTRL1)); /* Board specific port settings */ @@ -162,9 +179,9 @@ static void rcar_usb_phy_shutdown(struct static int rcar_usb_phy_probe(struct platform_device *pdev) { struct rcar_usb_phy_priv *priv; - struct resource *res0; + struct resource *res0, *res1; struct device *dev = &pdev->dev; - void __iomem *reg0; + void __iomem *reg0, *reg1 = NULL; int ret; if (!pdev->dev.platform_data) { @@ -182,6 +199,13 @@ static int rcar_usb_phy_probe(struct pla if (IS_ERR(reg0)) return PTR_ERR(reg0); + res1 = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (res1) { + reg1 = devm_ioremap_resource(dev, res1); + if (IS_ERR(reg1)) + return PTR_ERR(reg1); + } + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) { dev_err(dev, "priv data allocation error\n"); @@ -189,6 +213,7 @@ static int rcar_usb_phy_probe(struct pla } priv->reg0 = reg0; + priv->reg1 = reg1; priv->counter = 0; priv->phy.dev = dev; priv->phy.label = dev_name(dev); Index: renesas/include/linux/usb/rcar-phy.h =================================================================== --- renesas.orig/include/linux/usb/rcar-phy.h +++ renesas/include/linux/usb/rcar-phy.h @@ -13,6 +13,8 @@ #include struct rcar_phy_platform_data { + bool ferrite_bead:1; /* (R8A7778 only) */ + bool port1_func:1; /* true: port 1 used by function, false: host */ unsigned penc1:1; /* Output of the PENC1 pin in function mode */ struct { /* Overcurrent pin control for ports 0..2 */ @@ -20,7 +22,7 @@ struct rcar_phy_platform_data { /* Set to false on port 1 in function mode */ bool active_high:1; /* true: active high, false: active low */ /* Set to true on port 1 in function mode */ - } ovc_pin[3]; + } ovc_pin[3]; /* (R8A7778 only has 2 ports) */ }; #endif /* __RCAR_PHY_H */