Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752670AbcCXXx7 (ORCPT ); Thu, 24 Mar 2016 19:53:59 -0400 Received: from vern.gendns.com ([50.115.127.205]:33392 "EHLO vern.gendns.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1750859AbcCXXxw (ORCPT ); Thu, 24 Mar 2016 19:53:52 -0400 From: David Lechner Cc: petr@barix.com, sergei.shtylyov@cogentembedded.com, David.Laight@ACULAB.COM, David Lechner , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Russell King , Sekhar Nori , Kevin Hilman , Kishon Vijay Abraham I , Greg Kroah-Hartman , Alan Stern , Bin Liu , Lee Jones , devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS), linux-kernel@vger.kernel.org (open list), linux-arm-kernel@lists.infradead.org (moderated list:ARM PORT), linux-usb@vger.kernel.org (open list:USB SUBSYSTEM) Subject: [PATCH v3 09/16] phy: da8xx-usb: new driver for DA8xx SoC USB PHY Date: Thu, 24 Mar 2016 18:51:34 -0500 Message-Id: <1458863503-31121-10-git-send-email-david@lechnology.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1458863503-31121-1-git-send-email-david@lechnology.com> References: <1458863503-31121-1-git-send-email-david@lechnology.com> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - vern.gendns.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - lechnology.com X-Get-Message-Sender-Via: vern.gendns.com: authenticated_id: davidmain+lechnology.com/only user confirmed/virtual account not confirmed X-Authenticated-Sender: vern.gendns.com: davidmain@lechnology.com X-Source: X-Source-Args: X-Source-Dir: To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 9412 Lines: 338 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 --- v3 changes: * Uses syscon device for CFGCHIP2 instead of using it directly. * Got rid of nop inline funtions * Correct suffix on funtions to match ops.* * Added header file for extern method. drivers/phy/Kconfig | 10 ++ drivers/phy/Makefile | 1 + drivers/phy/phy-da8xx-usb.c | 249 ++++++++++++++++++++++++++++++++++++++ include/linux/phy/phy-da8xx-usb.h | 19 +++ 4 files changed, 279 insertions(+) create mode 100644 drivers/phy/phy-da8xx-usb.c create mode 100644 include/linux/phy/phy-da8xx-usb.h diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 26566db..c1d315f 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -35,6 +35,16 @@ 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 24596a9..722e01c 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_GENERIC_PHY) += phy-core.o obj-$(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..687d9a0 --- /dev/null +++ b/drivers/phy/phy-da8xx-usb.c @@ -0,0 +1,249 @@ +/* + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 +#include +#include +#include + +struct da8xx_usbphy { + 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_usbphy *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, CFGCHIP2_REG, CFGCHIP2_USB1SUSPENDM, + CFGCHIP2_USB1SUSPENDM); + + return 0; +} + +static int da8xx_usb11_phy_power_off(struct phy *phy) +{ + struct da8xx_usbphy *d_phy = phy_get_drvdata(phy); + + regmap_write_bits(d_phy->regmap, CFGCHIP2_REG, 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_init(struct phy *phy) +{ + struct da8xx_usbphy *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, CFGCHIP2_REG, CFGCHIP2_OTGPWRDN, 0); + + return 0; +} + +static int da8xx_usb20_phy_shutdown(struct phy *phy) +{ + struct da8xx_usbphy *d_phy = phy_get_drvdata(phy); + + regmap_write_bits(d_phy->regmap, CFGCHIP2_REG, CFGCHIP2_OTGPWRDN, + CFGCHIP2_OTGPWRDN); + + clk_disable_unprepare(d_phy->usb20_clk); + + return 0; +} + +static const struct phy_ops da8xx_usb20_phy_ops = { + .power_on = da8xx_usb20_phy_init, + .power_off = da8xx_usb20_phy_shutdown, + .owner = THIS_MODULE, +}; + +int da8xx_usb20_phy_set_mode(struct phy *phy, enum musb_mode mode) +{ + struct da8xx_usbphy *d_phy = phy_get_drvdata(phy); + u32 val; + + switch (mode) { + case MUSB_HOST: /* Force VBUS valid, ID = 0 */ + val = CFGCHIP2_FORCE_HOST; + break; + case MUSB_PERIPHERAL: /* Force VBUS valid, ID = 1 */ + val = CFGCHIP2_FORCE_DEVICE; + break; + case MUSB_OTG: /* Don't override the VBUS/ID comparators */ + val = CFGCHIP2_NO_OVERRIDE; + break; + default: + return -EINVAL; + } + + regmap_write_bits(d_phy->regmap, CFGCHIP2_REG, CFGCHIP2_OTGMODE_MASK, + val); + + return 0; +} +EXPORT_SYMBOL_GPL(da8xx_usb20_phy_set_mode); + +static struct phy *da8xx_usbphy_of_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct da8xx_usbphy *d_phy = dev_get_drvdata(dev); + + if (!d_phy) + return ERR_PTR(-ENODEV); + + switch (args->args[0]) { + case 1: + return d_phy->usb11_phy; + case 2: + return d_phy->usb20_phy; + default: + return ERR_PTR(-EINVAL); + } +} + +static int da8xx_usbphy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; + struct da8xx_usbphy *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_usbphy_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, "usbphy", "ohci.0"); + if (ret) + dev_warn(dev, "Failed to create usb11 phy lookup .\n"); + ret = phy_create_lookup(d_phy->usb20_phy, "usbphy", "musb-da8xx"); + if (ret) + dev_warn(dev, "Failed to create usb20 phy lookup .\n"); + } + + return 0; +} + +static int da8xx_usbphy_remove(struct platform_device *pdev) +{ + struct da8xx_usbphy *d_phy = platform_get_drvdata(pdev); + + if (!pdev->dev.of_node) { + phy_remove_lookup(d_phy->usb20_phy, "usbphy", "musb-da8xx"); + phy_remove_lookup(d_phy->usb11_phy, "usbphy", "ohci.0"); + } + + return 0; +} + +static const struct of_device_id da8xx_usbphy_ids[] = { + { .compatible = "ti,da830-usbphy" }, + { } +}; +MODULE_DEVICE_TABLE(of, da8xx_usbphy_ids); + +static struct platform_driver da8xx_usbphy_driver = { + .probe = da8xx_usbphy_probe, + .remove = da8xx_usbphy_remove, + .driver = { + .name = "da8xx-usbphy", + .of_match_table = da8xx_usbphy_ids, + }, +}; + +module_platform_driver(da8xx_usbphy_driver); + +MODULE_ALIAS("platform:da8xx-usbphy"); +MODULE_AUTHOR("David Lechner "); +MODULE_DESCRIPTION("TI DA8xx USB PHY driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/phy/phy-da8xx-usb.h b/include/linux/phy/phy-da8xx-usb.h new file mode 100644 index 0000000..5d1b39e --- /dev/null +++ b/include/linux/phy/phy-da8xx-usb.h @@ -0,0 +1,19 @@ +/* + * phy-da8xx-usb.h - TI 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; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __PHY_DA8XX_USB_H +#define __PHY_DA8XX_USB_H + +#include + +extern int da8xx_usb20_phy_set_mode(struct phy *phy, enum musb_mode mode); + +#endif /* __PHY_DA8XX_USB_H */ -- 1.9.1