From patchwork Fri Nov 1 19:45:57 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matt Porter X-Patchwork-Id: 21313 Return-Path: X-Original-To: linaro@patches.linaro.org Delivered-To: linaro@patches.linaro.org Received: from mail-pb0-f72.google.com (mail-pb0-f72.google.com [209.85.160.72]) by ip-10-151-82-157.ec2.internal (Postfix) with ESMTPS id 50DE823908 for ; Fri, 1 Nov 2013 19:46:30 +0000 (UTC) Received: by mail-pb0-f72.google.com with SMTP id jt11sf7987718pbb.11 for ; Fri, 01 Nov 2013 12:46:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:delivered-to:from:to:cc:subject :date:message-id:in-reply-to:references:x-original-sender :x-original-authentication-results:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-unsubscribe; bh=361Xrv1twzrNuRxkh1ZWzHmkteTqSPbmzmJLkTU5tKo=; b=cmTWd8MuCvjl4LET6JzBqfiY27Y9nFs/mJuBI9uh2SeMhP5MVzIezrVLnDQdJefPZx OGVXBUO975Ic3LCJVL1CB4Jl+zP4DqobyKtrnnycc8OzO/mlmZsGxcpXbmcythp4grc/ t4Xk3+kPN2oMPEfa2n8ezXdFZ0k9R4nMUkXnHdFdcT/i3zW4D7zJYhosgTTLKYWC1Ox9 J5/D3IjEDPfnskQC/9qPFyPXI4NdDN4YHnLp7C0SlgzOVnBapzuF7BPpnwTLeetIxDGa omL2ScPfA3ElvBcqpeZ4Gq/4DwyFIlChnrux+aC4+l6yvhlCbN+ILr+MamfLSQ3ju6wC cu9w== X-Gm-Message-State: ALoCoQm24MlhljhrvacbAVpXukTk0ZOY/9QpTyqKFu/qC3eF21tKppRjmvowsRzbGF+zLi/x2zN3 X-Received: by 10.66.188.37 with SMTP id fx5mr505355pac.45.1383335189639; Fri, 01 Nov 2013 12:46:29 -0700 (PDT) MIME-Version: 1.0 X-BeenThere: patchwork-forward@linaro.org Received: by 10.49.85.198 with SMTP id j6ls1417553qez.6.gmail; Fri, 01 Nov 2013 12:46:29 -0700 (PDT) X-Received: by 10.220.48.194 with SMTP id s2mr442145vcf.43.1383335189488; Fri, 01 Nov 2013 12:46:29 -0700 (PDT) Received: from mail-vb0-f41.google.com (mail-vb0-f41.google.com [209.85.212.41]) by mx.google.com with ESMTPS id tw10si1032679vec.120.2013.11.01.12.46.29 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 01 Nov 2013 12:46:29 -0700 (PDT) Received-SPF: neutral (google.com: 209.85.212.41 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) client-ip=209.85.212.41; Received: by mail-vb0-f41.google.com with SMTP id w8so3130332vbj.14 for ; Fri, 01 Nov 2013 12:46:29 -0700 (PDT) X-Received: by 10.52.122.71 with SMTP id lq7mr126980vdb.65.1383335189391; Fri, 01 Nov 2013 12:46:29 -0700 (PDT) X-Forwarded-To: patchwork-forward@linaro.org X-Forwarded-For: patch@linaro.org patchwork-forward@linaro.org Delivered-To: patches@linaro.org Received: by 10.220.174.196 with SMTP id u4csp66776vcz; Fri, 1 Nov 2013 12:46:28 -0700 (PDT) X-Received: by 10.50.11.67 with SMTP id o3mr3509007igb.55.1383335188521; Fri, 01 Nov 2013 12:46:28 -0700 (PDT) Received: from mail-ie0-f169.google.com (mail-ie0-f169.google.com [209.85.223.169]) by mx.google.com with ESMTPS id u10si9870550icp.153.2013.11.01.12.46.28 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 01 Nov 2013 12:46:28 -0700 (PDT) Received-SPF: neutral (google.com: 209.85.223.169 is neither permitted nor denied by best guess record for domain of matt.porter@linaro.org) client-ip=209.85.223.169; Received: by mail-ie0-f169.google.com with SMTP id ar20so8490714iec.28 for ; Fri, 01 Nov 2013 12:46:28 -0700 (PDT) X-Received: by 10.42.92.84 with SMTP id s20mr1338528icm.63.1383335188231; Fri, 01 Nov 2013 12:46:28 -0700 (PDT) Received: from beef.ohporter.com (cpe-98-27-254-98.neo.res.rr.com. [98.27.254.98]) by mx.google.com with ESMTPSA id f5sm5616338igc.4.2013.11.01.12.46.26 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 01 Nov 2013 12:46:27 -0700 (PDT) From: Matt Porter To: Felipe Balbi , Greg Kroah-Hartman , Kishon Vijay Abraham I , Rob Herring , Pawel Moll , Mark Rutland , Kumar Gala , Ian Campbell , Christian Daudt , Paul Zimmerman Cc: Linux USB List , Linux ARM Kernel List , Linux Kernel Mailing List , Devicetree List , Linaro Patches Subject: [PATCH v2 8/9] phy: add Broadcom Kona USB2 PHY driver Date: Fri, 1 Nov 2013 15:45:57 -0400 Message-Id: <1383335158-19730-9-git-send-email-matt.porter@linaro.org> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1383335158-19730-1-git-send-email-matt.porter@linaro.org> References: <1383335158-19730-1-git-send-email-matt.porter@linaro.org> X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: matt.porter@linaro.org X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.212.41 is neither permitted nor denied by best guess record for domain of patch+caf_=patchwork-forward=linaro.org@linaro.org) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Precedence: list Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org List-ID: X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , Add a driver for the internal Broadcom Kona USB 2.0 PHY found on the BCM281xx family of SoCs. Signed-off-by: Matt Porter --- drivers/phy/Kconfig | 6 ++ drivers/phy/Makefile | 2 + drivers/phy/phy-bcm-kona-usb2.c | 161 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 169 insertions(+) create mode 100644 drivers/phy/phy-bcm-kona-usb2.c diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 349bef2..cedada5 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -15,4 +15,10 @@ config GENERIC_PHY phy users can obtain reference to the PHY. All the users of this framework should select this config. +config BCM_KONA_USB2_PHY + tristate "Broadcom Kona USB2 PHY Driver" + depends on GENERIC_PHY + help + Enable this to support the Broadcom Kona USB 2.0 PHY. + endmenu diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 9e9560f..ce83a14 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -3,3 +3,5 @@ # obj-$(CONFIG_GENERIC_PHY) += phy-core.o + +obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o diff --git a/drivers/phy/phy-bcm-kona-usb2.c b/drivers/phy/phy-bcm-kona-usb2.c new file mode 100644 index 0000000..1beea7f --- /dev/null +++ b/drivers/phy/phy-bcm-kona-usb2.c @@ -0,0 +1,161 @@ +/* + * phy-bcm-kona-usb2.c - Broadcom Kona USB2 Phy Driver + * + * Copyright (C) 2013 Linaro Limited + * Matt Porter + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define OTGCTL_OTGSTAT2 (1 << 31) +#define OTGCTL_OTGSTAT1 (1 << 30) +#define OTGCTL_PRST_N_SW (1 << 11) +#define OTGCTL_HRESET_N (1 << 10) +#define OTGCTL_UTMI_LINE_STATE1 (1 << 9) +#define OTGCTL_UTMI_LINE_STATE0 (1 << 8) + +#define P1CTL_SOFT_RESET (1 << 1) +#define P1CTL_NON_DRIVING (1 << 0) + +struct bcm_kona_usb_phy_regs { + u32 ctrl; + u32 cfg; + u32 p1ctl; + u32 status; + u32 bc_cfg; + u32 tp_in; + u32 tp_out; + u32 phy_ctrl; + u32 usbreg; + u32 usbproben; +}; + +struct bcm_kona_usb { + struct bcm_kona_usb_phy_regs *regs; +}; + +static void bcm_kona_usb_phy_power(struct bcm_kona_usb *phy, int on) +{ + u32 val; + + val = readl(&phy->regs->ctrl); + if (on) { + /* Configure and power PHY */ + val &= ~(OTGCTL_OTGSTAT2 | OTGCTL_OTGSTAT1 | + OTGCTL_UTMI_LINE_STATE1 | OTGCTL_UTMI_LINE_STATE0); + val |= OTGCTL_PRST_N_SW | OTGCTL_HRESET_N; + writel(val, &phy->regs->ctrl); + + /* Soft reset PHY */ + val = readl(&phy->regs->p1ctl); + val &= ~P1CTL_NON_DRIVING; + val |= P1CTL_SOFT_RESET; + writel(val, &phy->regs->p1ctl); + writel(val & ~P1CTL_SOFT_RESET, &phy->regs->p1ctl); + /* Reset needs to be asserted for 2ms */ + mdelay(2); + writel(val | P1CTL_SOFT_RESET, &phy->regs->p1ctl); + } else { + val &= ~(OTGCTL_PRST_N_SW | OTGCTL_HRESET_N); + writel(val, &phy->regs->ctrl); + } +} + +static int bcm_kona_usb_phy_power_on(struct phy *gphy) +{ + struct bcm_kona_usb *phy = phy_get_drvdata(gphy); + + bcm_kona_usb_phy_power(phy, 1); + + return 0; +} + +static int bcm_kona_usb_phy_power_off(struct phy *gphy) +{ + struct bcm_kona_usb *phy = phy_get_drvdata(gphy); + + bcm_kona_usb_phy_power(phy, 0); + + return 0; +} + +static struct phy_ops ops = { + .power_on = bcm_kona_usb_phy_power_on, + .power_off = bcm_kona_usb_phy_power_off, + .owner = THIS_MODULE, +}; + +static int bcm_kona_usb2_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct bcm_kona_usb *phy; + struct resource *res; + struct phy *gphy; + struct phy_provider *phy_provider; + + phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + phy->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(phy->regs)) + return PTR_ERR(phy->regs); + + platform_set_drvdata(pdev, phy); + + phy_provider = devm_of_phy_provider_register(dev, + of_phy_simple_xlate); + if (IS_ERR(phy_provider)) + return PTR_ERR(phy_provider); + + gphy = devm_phy_create(dev, &ops, NULL); + if (IS_ERR(gphy)) + return PTR_ERR(gphy); + + /* The Kona PHY supports an 8-bit wide UTMI interface */ + phy_set_bus_width(gphy, 8); + + phy_set_drvdata(gphy, phy); + + return 0; +} + +static const struct of_device_id bcm_kona_usb2_dt_ids[] = { + { .compatible = "brcm,kona-usb2-phy" }, + { /* sentinel */ } +}; + +MODULE_DEVICE_TABLE(of, bcm_kona_usb2_dt_ids); + +static struct platform_driver bcm_kona_usb2_driver = { + .probe = bcm_kona_usb2_probe, + .driver = { + .name = "bcm-kona-usb2", + .owner = THIS_MODULE, + .of_match_table = bcm_kona_usb2_dt_ids, + }, +}; + +module_platform_driver(bcm_kona_usb2_driver); + +MODULE_ALIAS("platform:bcm-kona-usb2"); +MODULE_AUTHOR("Matt Porter"); +MODULE_DESCRIPTION("BCM Kona USB 2.0 PHY driver"); +MODULE_LICENSE("GPL v2");