From patchwork Wed Apr 10 08:08:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 10893383 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 933E21708 for ; Wed, 10 Apr 2019 08:15:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7E7D8289EE for ; Wed, 10 Apr 2019 08:15:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 720C5289F1; Wed, 10 Apr 2019 08:15:18 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EAC2D289EE for ; Wed, 10 Apr 2019 08:15:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729128AbfDJIPR (ORCPT ); Wed, 10 Apr 2019 04:15:17 -0400 Received: from relmlor1.renesas.com ([210.160.252.171]:36407 "EHLO relmlie5.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727281AbfDJIPR (ORCPT ); Wed, 10 Apr 2019 04:15:17 -0400 X-IronPort-AV: E=Sophos;i="5.60,332,1549897200"; d="scan'208";a="12836963" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie5.idc.renesas.com with ESMTP; 10 Apr 2019 17:15:15 +0900 Received: from be1yocto.ree.adwin.renesas.com (unknown [172.29.43.62]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 8138C426FF85; Wed, 10 Apr 2019 17:15:13 +0900 (JST) From: Biju Das To: Kishon Vijay Abraham I , Yoshihiro Shimoda Cc: Biju Das , Simon Horman , Wolfram Sang , Simon Horman , Geert Uytterhoeven , Chris Paterson , Fabrizio Castro , linux-renesas-soc@vger.kernel.org Subject: [PATCH V4 02/13] phy: renesas: phy-rcar-gen2: Add support for r8a77470 Date: Wed, 10 Apr 2019 09:08:24 +0100 Message-Id: <1554883715-41725-3-git-send-email-biju.das@bp.renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1554883715-41725-1-git-send-email-biju.das@bp.renesas.com> References: <1554883715-41725-1-git-send-email-biju.das@bp.renesas.com> Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds support for RZ/G1C (r8a77470) SoC. RZ/G1C SoC has a PLL register shared between hsusb0 and hsusb1. Compared to other RZ/G1 and R-Car Gen2/3, USB Host needs to deassert the pll reset. Signed-off-by: Biju Das Reviewed-by: Yoshihiro Shimoda --- V3-->V4 * No Change V2-->V3 * No change V1-->V2 * Incorporated shimoda-san's review comment Ref: https://patchwork.kernel.org/patch/10655855/ --- drivers/phy/renesas/phy-rcar-gen2.c | 86 ++++++++++++++++++++++++++++++++++++- 1 file changed, 84 insertions(+), 2 deletions(-) diff --git a/drivers/phy/renesas/phy-rcar-gen2.c b/drivers/phy/renesas/phy-rcar-gen2.c index 72eeb06..5897386 100644 --- a/drivers/phy/renesas/phy-rcar-gen2.c +++ b/drivers/phy/renesas/phy-rcar-gen2.c @@ -4,6 +4,7 @@ * * Copyright (C) 2014 Renesas Solutions Corp. * Copyright (C) 2014 Cogent Embedded, Inc. + * Copyright (C) 2019 Renesas Electronics Corp. */ #include @@ -15,6 +16,7 @@ #include #include #include +#include #define USBHS_LPSTS 0x02 #define USBHS_UGCTRL 0x80 @@ -35,6 +37,8 @@ #define USBHS_UGCTRL2_USB0SEL 0x00000030 #define USBHS_UGCTRL2_USB0SEL_PCI 0x00000010 #define USBHS_UGCTRL2_USB0SEL_HS_USB 0x00000030 +#define USBHS_UGCTRL2_USB0SEL_USB20 0x00000010 +#define USBHS_UGCTRL2_USB0SEL_HS_USB20 0x00000020 /* USB General status register (UGSTS) */ #define USBHS_UGSTS_LOCK 0x00000100 /* From technical update */ @@ -180,6 +184,60 @@ static int rcar_gen2_phy_power_off(struct phy *p) return 0; } +static int rz_g1c_phy_power_on(struct phy *p) +{ + struct rcar_gen2_phy *phy = phy_get_drvdata(p); + struct rcar_gen2_phy_driver *drv = phy->channel->drv; + void __iomem *base = drv->base; + unsigned long flags; + u32 value; + + spin_lock_irqsave(&drv->lock, flags); + + /* Power on USBHS PHY */ + value = readl(base + USBHS_UGCTRL); + value &= ~USBHS_UGCTRL_PLLRESET; + writel(value, base + USBHS_UGCTRL); + + /* As per the data sheet wait 340 micro sec for power stable */ + udelay(340); + + if (phy->select_value == USBHS_UGCTRL2_USB0SEL_HS_USB20) { + value = readw(base + USBHS_LPSTS); + value |= USBHS_LPSTS_SUSPM; + writew(value, base + USBHS_LPSTS); + } + + spin_unlock_irqrestore(&drv->lock, flags); + + return 0; +} + +static int rz_g1c_phy_power_off(struct phy *p) +{ + struct rcar_gen2_phy *phy = phy_get_drvdata(p); + struct rcar_gen2_phy_driver *drv = phy->channel->drv; + void __iomem *base = drv->base; + unsigned long flags; + u32 value; + + spin_lock_irqsave(&drv->lock, flags); + /* Power off USBHS PHY */ + if (phy->select_value == USBHS_UGCTRL2_USB0SEL_HS_USB20) { + value = readw(base + USBHS_LPSTS); + value &= ~USBHS_LPSTS_SUSPM; + writew(value, base + USBHS_LPSTS); + } + + value = readl(base + USBHS_UGCTRL); + value |= USBHS_UGCTRL_PLLRESET; + writel(value, base + USBHS_UGCTRL); + + spin_unlock_irqrestore(&drv->lock, flags); + + return 0; +} + static const struct phy_ops rcar_gen2_phy_ops = { .init = rcar_gen2_phy_init, .exit = rcar_gen2_phy_exit, @@ -188,6 +246,14 @@ static const struct phy_ops rcar_gen2_phy_ops = { .owner = THIS_MODULE, }; +static const struct phy_ops rz_g1c_phy_ops = { + .init = rcar_gen2_phy_init, + .exit = rcar_gen2_phy_exit, + .power_on = rz_g1c_phy_power_on, + .power_off = rz_g1c_phy_power_off, + .owner = THIS_MODULE, +}; + static const struct of_device_id rcar_gen2_phy_match_table[] = { { .compatible = "renesas,usb-phy-r8a7790" }, { .compatible = "renesas,usb-phy-r8a7791" }, @@ -224,11 +290,20 @@ static const u32 select_mask[] = { [2] = USBHS_UGCTRL2_USB2SEL, }; -static const u32 select_value[][PHYS_PER_CHANNEL] = { +static const u32 pci_select_value[][PHYS_PER_CHANNEL] = { [0] = { USBHS_UGCTRL2_USB0SEL_PCI, USBHS_UGCTRL2_USB0SEL_HS_USB }, [2] = { USBHS_UGCTRL2_USB2SEL_PCI, USBHS_UGCTRL2_USB2SEL_USB30 }, }; +static const u32 usb20_select_value[][PHYS_PER_CHANNEL] = { + { USBHS_UGCTRL2_USB0SEL_USB20, USBHS_UGCTRL2_USB0SEL_HS_USB20 }, +}; + +static struct soc_device_attribute soc_r8a77470[] = { + { .soc_id = "r8a77470" }, + { /* sentinel */ } +}; + static int rcar_gen2_phy_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -238,6 +313,8 @@ static int rcar_gen2_phy_probe(struct platform_device *pdev) struct resource *res; void __iomem *base; struct clk *clk; + const struct phy_ops *gen2_phy_ops = &rcar_gen2_phy_ops; + const u32 (*select_value)[PHYS_PER_CHANNEL] = pci_select_value; int i = 0; if (!dev->of_node) { @@ -266,6 +343,11 @@ static int rcar_gen2_phy_probe(struct platform_device *pdev) drv->clk = clk; drv->base = base; + if (soc_device_match(soc_r8a77470)) { + select_value = usb20_select_value; + gen2_phy_ops = &rz_g1c_phy_ops; + } + drv->num_channels = of_get_child_count(dev->of_node); drv->channels = devm_kcalloc(dev, drv->num_channels, sizeof(struct rcar_gen2_channel), @@ -297,7 +379,7 @@ static int rcar_gen2_phy_probe(struct platform_device *pdev) phy->select_value = select_value[channel_num][n]; phy->phy = devm_phy_create(dev, NULL, - &rcar_gen2_phy_ops); + gen2_phy_ops); if (IS_ERR(phy->phy)) { dev_err(dev, "Failed to create PHY\n"); return PTR_ERR(phy->phy);