From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pg1-x542.google.com ([2607:f8b0:4864:20::542]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gwMKT-0003DA-OQ for barebox@lists.infradead.org; Wed, 20 Feb 2019 07:30:14 +0000 Received: by mail-pg1-x542.google.com with SMTP id r11so11421074pgp.6 for ; Tue, 19 Feb 2019 23:30:05 -0800 (PST) From: Andrey Smirnov Date: Tue, 19 Feb 2019 23:29:23 -0800 Message-Id: <20190220072930.14300-19-andrew.smirnov@gmail.com> In-Reply-To: <20190220072930.14300-1-andrew.smirnov@gmail.com> References: <20190220072930.14300-1-andrew.smirnov@gmail.com> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 18/25] phy: Port i.MX8MQ USB PHY driver from Linux To: barebox@lists.infradead.org Cc: Andrey Smirnov Port i.MX8MQ USB PHY driver from Linux. Signed-off-by: Andrey Smirnov --- drivers/phy/Kconfig | 2 + drivers/phy/Makefile | 1 + drivers/phy/freescale/Kconfig | 4 + drivers/phy/freescale/Makefile | 1 + drivers/phy/freescale/phy-fsl-imx8mq-usb.c | 130 +++++++++++++++++++++ 5 files changed, 138 insertions(+) create mode 100644 drivers/phy/freescale/Kconfig create mode 100644 drivers/phy/freescale/Makefile create mode 100644 drivers/phy/freescale/phy-fsl-imx8mq-usb.c diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index b0c8b9bf0..b5cefb2ff 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -22,4 +22,6 @@ config USB_NOP_XCEIV built-in with usb ip or which are autonomous and doesn't require any phy programming such as ISP1x04 etc. +source "drivers/phy/freescale/Kconfig" + endif diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 8fc85953b..179c55e60 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_GENERIC_PHY) += phy-core.o obj-$(CONFIG_USB_NOP_XCEIV) += usb-nop-xceiv.o +obj-y += freescale/ diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig new file mode 100644 index 000000000..8e56dd7e7 --- /dev/null +++ b/drivers/phy/freescale/Kconfig @@ -0,0 +1,4 @@ +config PHY_FSL_IMX8MQ_USB + bool "Freescale i.MX8M USB3 PHY" + default SOC_IMX8MQ + diff --git a/drivers/phy/freescale/Makefile b/drivers/phy/freescale/Makefile new file mode 100644 index 000000000..dc2b3f1f2 --- /dev/null +++ b/drivers/phy/freescale/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_PHY_FSL_IMX8MQ_USB) += phy-fsl-imx8mq-usb.o diff --git a/drivers/phy/freescale/phy-fsl-imx8mq-usb.c b/drivers/phy/freescale/phy-fsl-imx8mq-usb.c new file mode 100644 index 000000000..1aef2b300 --- /dev/null +++ b/drivers/phy/freescale/phy-fsl-imx8mq-usb.c @@ -0,0 +1,130 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Copyright (c) 2017 NXP. */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + + +#define PHY_CTRL0 0x0 +#define PHY_CTRL0_REF_SSP_EN BIT(2) + +#define PHY_CTRL1 0x4 +#define PHY_CTRL1_RESET BIT(0) +#define PHY_CTRL1_COMMONONN BIT(1) +#define PHY_CTRL1_ATERESET BIT(3) +#define PHY_CTRL1_VDATSRCENB0 BIT(19) +#define PHY_CTRL1_VDATDETENB0 BIT(20) + +#define PHY_CTRL2 0x8 +#define PHY_CTRL2_TXENABLEN0 BIT(8) + +struct imx8mq_usb_phy { + struct phy *phy; + struct clk *clk; + void __iomem *base; +}; + +static int imx8mq_usb_phy_init(struct phy *phy) +{ + struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy); + u32 value; + + value = readl(imx_phy->base + PHY_CTRL1); + value &= ~(PHY_CTRL1_VDATSRCENB0 | PHY_CTRL1_VDATDETENB0 | + PHY_CTRL1_COMMONONN); + value |= PHY_CTRL1_RESET | PHY_CTRL1_ATERESET; + writel(value, imx_phy->base + PHY_CTRL1); + + value = readl(imx_phy->base + PHY_CTRL0); + value |= PHY_CTRL0_REF_SSP_EN; + writel(value, imx_phy->base + PHY_CTRL0); + + value = readl(imx_phy->base + PHY_CTRL2); + value |= PHY_CTRL2_TXENABLEN0; + writel(value, imx_phy->base + PHY_CTRL2); + + value = readl(imx_phy->base + PHY_CTRL1); + value &= ~(PHY_CTRL1_RESET | PHY_CTRL1_ATERESET); + writel(value, imx_phy->base + PHY_CTRL1); + + return 0; +} + +static int imx8mq_phy_power_on(struct phy *phy) +{ + struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy); + + return clk_enable(imx_phy->clk); +} + +static int imx8mq_phy_power_off(struct phy *phy) +{ + struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy); + + clk_disable(imx_phy->clk); + + return 0; +} + +static struct phy_ops imx8mq_usb_phy_ops = { + .init = imx8mq_usb_phy_init, + .power_on = imx8mq_phy_power_on, + .power_off = imx8mq_phy_power_off, +}; + +static struct phy *imx8mq_usb_phy_xlate(struct device_d *dev, + struct of_phandle_args *args) +{ + struct imx8mq_usb_phy *imx_phy = dev->priv; + + return imx_phy->phy; +} + +static int imx8mq_usb_phy_probe(struct device_d *dev) +{ + struct phy_provider *phy_provider; + struct imx8mq_usb_phy *imx_phy; + + imx_phy = xzalloc(sizeof(*imx_phy)); + + dev->priv = imx_phy; + + imx_phy->clk = clk_get(dev, "phy"); + if (IS_ERR(imx_phy->clk)) + return PTR_ERR(imx_phy->clk); + + imx_phy->base = dev_get_mem_region(dev, 0); + if (IS_ERR(imx_phy->base)) + return PTR_ERR(imx_phy->base); + + imx_phy->phy = phy_create(dev, NULL, &imx8mq_usb_phy_ops, NULL); + if (IS_ERR(imx_phy->phy)) + return PTR_ERR(imx_phy->phy); + + phy_set_drvdata(imx_phy->phy, imx_phy); + + phy_provider = of_phy_provider_register(dev, imx8mq_usb_phy_xlate); + + return PTR_ERR_OR_ZERO(phy_provider); +} + +static const struct of_device_id imx8mq_usb_phy_of_match[] = { + {.compatible = "fsl,imx8mq-usb-phy",}, + { }, +}; + +static struct driver_d imx8mq_usb_phy_driver = { + .name = "imx8mq-usb-phy", + .probe = imx8mq_usb_phy_probe, + .of_compatible = DRV_OF_COMPAT(imx8mq_usb_phy_of_match), +}; +device_platform_driver(imx8mq_usb_phy_driver); -- 2.20.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox