From patchwork Tue Jul 5 05:23:51 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 102048 Delivered-To: patch@linaro.org Received: by 10.140.28.4 with SMTP id 4csp127014qgy; Mon, 4 Jul 2016 22:24:43 -0700 (PDT) X-Received: by 10.66.85.197 with SMTP id j5mr29257060paz.87.1467696278398; Mon, 04 Jul 2016 22:24:38 -0700 (PDT) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 87si2191372pfn.73.2016.07.04.22.24.38; Mon, 04 Jul 2016 22:24:38 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754577AbcGEFY2 (ORCPT + 30 others); Tue, 5 Jul 2016 01:24:28 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:57782 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754465AbcGEFYJ (ORCPT ); Tue, 5 Jul 2016 01:24:09 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id u655McDG018412; Tue, 5 Jul 2016 00:22:38 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id u655O8ae016942; Tue, 5 Jul 2016 00:24:08 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.294.0; Tue, 5 Jul 2016 00:24:07 -0500 Received: from a0393678ub.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id u655Nv2U001289; Tue, 5 Jul 2016 00:24:06 -0500 From: Kishon Vijay Abraham I To: CC: , Subject: [PATCH 04/10] phy: da8xx-usb: new driver for DA8xx SoC USB PHY Date: Tue, 5 Jul 2016 10:53:51 +0530 Message-ID: <1467696237-27831-5-git-send-email-kishon@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1467696237-27831-1-git-send-email-kishon@ti.com> References: <1467696237-27831-1-git-send-email-kishon@ti.com> MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: David Lechner This is a new phy driver for the SoC USB controllers on the TI DA8xx family of microcontrollers. The USB 1.1 PHY is just a simple on/off. The USB 2.0 PHY also allows overriding the VBUS and ID pins. Signed-off-by: David Lechner Signed-off-by: Kishon Vijay Abraham I --- drivers/phy/Kconfig | 10 ++ drivers/phy/Makefile | 1 + drivers/phy/phy-da8xx-usb.c | 245 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 256 insertions(+) create mode 100644 drivers/phy/phy-da8xx-usb.c -- 1.7.9.5 diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index b869b98..02afc624 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -44,6 +44,16 @@ config ARMADA375_USBCLUSTER_PHY depends on OF && HAS_IOMEM select GENERIC_PHY +config PHY_DA8XX_USB + tristate "TI DA8xx USB PHY Driver" + depends on ARCH_DAVINCI_DA8XX + select GENERIC_PHY + select MFD_SYSCON + help + Enable this to support the USB PHY on DA8xx SoCs. + + This driver controls both the USB 1.1 PHY and the USB 2.0 PHY. + config PHY_DM816X_USB tristate "TI dm816x USB PHY driver" depends on ARCH_OMAP2PLUS diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 9c3e73c..fa8480e 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_GENERIC_PHY) += phy-core.o obj-$(CONFIG_PHY_BCM_NS_USB2) += phy-bcm-ns-usb2.o obj-$(CONFIG_PHY_BERLIN_USB) += phy-berlin-usb.o obj-$(CONFIG_PHY_BERLIN_SATA) += phy-berlin-sata.o +obj-$(CONFIG_PHY_DA8XX_USB) += phy-da8xx-usb.o obj-$(CONFIG_PHY_DM816X_USB) += phy-dm816x-usb.o obj-$(CONFIG_ARMADA375_USBCLUSTER_PHY) += phy-armada375-usb2.o obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o diff --git a/drivers/phy/phy-da8xx-usb.c b/drivers/phy/phy-da8xx-usb.c new file mode 100644 index 0000000..b2e59b6 --- /dev/null +++ b/drivers/phy/phy-da8xx-usb.c @@ -0,0 +1,245 @@ +/* + * phy-da8xx-usb - TI DaVinci DA8xx USB PHY driver + * + * Copyright (C) 2016 David Lechner + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * 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 +#include + +struct da8xx_usb_phy { + struct phy_provider *phy_provider; + struct phy *usb11_phy; + struct phy *usb20_phy; + struct clk *usb11_clk; + struct clk *usb20_clk; + struct regmap *regmap; +}; + +static int da8xx_usb11_phy_power_on(struct phy *phy) +{ + struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); + int ret; + + ret = clk_prepare_enable(d_phy->usb11_clk); + if (ret) + return ret; + + regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, + CFGCHIP2_USB1SUSPENDM); + + return 0; +} + +static int da8xx_usb11_phy_power_off(struct phy *phy) +{ + struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); + + regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, 0); + + clk_disable_unprepare(d_phy->usb11_clk); + + return 0; +} + +static const struct phy_ops da8xx_usb11_phy_ops = { + .power_on = da8xx_usb11_phy_power_on, + .power_off = da8xx_usb11_phy_power_off, + .owner = THIS_MODULE, +}; + +static int da8xx_usb20_phy_power_on(struct phy *phy) +{ + struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); + int ret; + + ret = clk_prepare_enable(d_phy->usb20_clk); + if (ret) + return ret; + + regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, 0); + + return 0; +} + +static int da8xx_usb20_phy_power_off(struct phy *phy) +{ + struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); + + regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, + CFGCHIP2_OTGPWRDN); + + clk_disable_unprepare(d_phy->usb20_clk); + + return 0; +} + +static int da8xx_usb20_phy_set_mode(struct phy *phy, enum phy_mode mode) +{ + struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); + u32 val; + + switch (mode) { + case PHY_MODE_USB_HOST: /* Force VBUS valid, ID = 0 */ + val = CFGCHIP2_OTGMODE_FORCE_HOST; + break; + case PHY_MODE_USB_DEVICE: /* Force VBUS valid, ID = 1 */ + val = CFGCHIP2_OTGMODE_FORCE_DEVICE; + break; + case PHY_MODE_USB_OTG: /* Don't override the VBUS/ID comparators */ + val = CFGCHIP2_OTGMODE_NO_OVERRIDE; + break; + default: + return -EINVAL; + } + + regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGMODE_MASK, + val); + + return 0; +} + +static const struct phy_ops da8xx_usb20_phy_ops = { + .power_on = da8xx_usb20_phy_power_on, + .power_off = da8xx_usb20_phy_power_off, + .set_mode = da8xx_usb20_phy_set_mode, + .owner = THIS_MODULE, +}; + +static struct phy *da8xx_usb_phy_of_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct da8xx_usb_phy *d_phy = dev_get_drvdata(dev); + + if (!d_phy) + return ERR_PTR(-ENODEV); + + switch (args->args[0]) { + case 0: + return d_phy->usb20_phy; + case 1: + return d_phy->usb11_phy; + default: + return ERR_PTR(-EINVAL); + } +} + +static int da8xx_usb_phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; + struct da8xx_usb_phy *d_phy; + + d_phy = devm_kzalloc(dev, sizeof(*d_phy), GFP_KERNEL); + if (!d_phy) + return -ENOMEM; + + if (node) + d_phy->regmap = syscon_regmap_lookup_by_compatible( + "ti,da830-cfgchip"); + else + d_phy->regmap = syscon_regmap_lookup_by_pdevname("syscon.0"); + if (IS_ERR(d_phy->regmap)) { + dev_err(dev, "Failed to get syscon\n"); + return PTR_ERR(d_phy->regmap); + } + + d_phy->usb11_clk = devm_clk_get(dev, "usb11_phy"); + if (IS_ERR(d_phy->usb11_clk)) { + dev_err(dev, "Failed to get usb11_phy clock\n"); + return PTR_ERR(d_phy->usb11_clk); + } + + d_phy->usb20_clk = devm_clk_get(dev, "usb20_phy"); + if (IS_ERR(d_phy->usb20_clk)) { + dev_err(dev, "Failed to get usb20_phy clock\n"); + return PTR_ERR(d_phy->usb20_clk); + } + + d_phy->usb11_phy = devm_phy_create(dev, node, &da8xx_usb11_phy_ops); + if (IS_ERR(d_phy->usb11_phy)) { + dev_err(dev, "Failed to create usb11 phy\n"); + return PTR_ERR(d_phy->usb11_phy); + } + + d_phy->usb20_phy = devm_phy_create(dev, node, &da8xx_usb20_phy_ops); + if (IS_ERR(d_phy->usb20_phy)) { + dev_err(dev, "Failed to create usb20 phy\n"); + return PTR_ERR(d_phy->usb20_phy); + } + + platform_set_drvdata(pdev, d_phy); + phy_set_drvdata(d_phy->usb11_phy, d_phy); + phy_set_drvdata(d_phy->usb20_phy, d_phy); + + if (node) { + d_phy->phy_provider = devm_of_phy_provider_register(dev, + da8xx_usb_phy_of_xlate); + if (IS_ERR(d_phy->phy_provider)) { + dev_err(dev, "Failed to create phy provider\n"); + return PTR_ERR(d_phy->phy_provider); + } + } else { + int ret; + + ret = phy_create_lookup(d_phy->usb11_phy, "usb-phy", "ohci.0"); + if (ret) + dev_warn(dev, "Failed to create usb11 phy lookup\n"); + ret = phy_create_lookup(d_phy->usb20_phy, "usb-phy", + "musb-da8xx"); + if (ret) + dev_warn(dev, "Failed to create usb20 phy lookup\n"); + } + + return 0; +} + +static int da8xx_usb_phy_remove(struct platform_device *pdev) +{ + struct da8xx_usb_phy *d_phy = platform_get_drvdata(pdev); + + if (!pdev->dev.of_node) { + phy_remove_lookup(d_phy->usb20_phy, "usb-phy", "musb-da8xx"); + phy_remove_lookup(d_phy->usb11_phy, "usb-phy", "ohci.0"); + } + + return 0; +} + +static const struct of_device_id da8xx_usb_phy_ids[] = { + { .compatible = "ti,da830-usb-phy" }, + { } +}; +MODULE_DEVICE_TABLE(of, da8xx_usb_phy_ids); + +static struct platform_driver da8xx_usb_phy_driver = { + .probe = da8xx_usb_phy_probe, + .remove = da8xx_usb_phy_remove, + .driver = { + .name = "da8xx-usb-phy", + .of_match_table = da8xx_usb_phy_ids, + }, +}; + +module_platform_driver(da8xx_usb_phy_driver); + +MODULE_ALIAS("platform:da8xx-usb-phy"); +MODULE_AUTHOR("David Lechner "); +MODULE_DESCRIPTION("TI DA8xx USB PHY driver"); +MODULE_LICENSE("GPL v2");