Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752628AbbETCLp (ORCPT ); Tue, 19 May 2015 22:11:45 -0400 Received: from mail-oi0-f44.google.com ([209.85.218.44]:33342 "EHLO mail-oi0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751261AbbETCKR (ORCPT ); Tue, 19 May 2015 22:10:17 -0400 From: Rob Herring To: Greg Kroah-Hartman , Peter Chen , Kishon Vijay Abraham I Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Arnd Bergmann , Alan Stern , Rob Herring Subject: [PATCH v2 3/6] phy: add Marvell HSIC 28nm PHY Date: Tue, 19 May 2015 21:10:02 -0500 Message-Id: <1432087805-16671-4-git-send-email-robh@kernel.org> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1432087805-16671-1-git-send-email-robh@kernel.org> References: <1432087805-16671-1-git-send-email-robh@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7714 Lines: 252 Add PHY driver for the Marvell HSIC 28nm PHY. This PHY is found in PXA1928 SOC. Signed-off-by: Rob Herring Cc: Kishon Vijay Abraham I --- drivers/phy/Kconfig | 10 +++ drivers/phy/Makefile | 1 + drivers/phy/phy-pxa-28nm-hsic.c | 193 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 204 insertions(+) create mode 100644 drivers/phy/phy-pxa-28nm-hsic.c diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 71409a1..7d56c44 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -52,6 +52,16 @@ config PHY_EXYNOS_MIPI_VIDEO Support for MIPI CSI-2 and MIPI DSI DPHY found on Samsung S5P and EXYNOS SoCs. +config PHY_PXA_28NM_HSIC + tristate "Marvell USB HSIC 28nm PHY Driver" + select GENERIC_PHY + help + Enable this to support Marvell USB HSIC PHY driver for Marvell + SoC. This driver will do the PHY initialization and shutdown. + The PHY driver will be used by Marvell ehci driver. + + To compile this driver as a module, choose M here. + config PHY_PXA_28NM_USB2 tristate "Marvell USB 2.0 28nm PHY Driver" select GENERIC_PHY diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 8524307..2c16963 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -11,6 +11,7 @@ obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o obj-$(CONFIG_PHY_PXA_28NM_USB2) += phy-pxa-28nm-usb2.o +obj-$(CONFIG_PHY_PXA_28NM_HSIC) += phy-pxa-28nm-hsic.o obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o obj-$(CONFIG_PHY_MIPHY28LP) += phy-miphy28lp.o obj-$(CONFIG_PHY_MIPHY365X) += phy-miphy365x.o diff --git a/drivers/phy/phy-pxa-28nm-hsic.c b/drivers/phy/phy-pxa-28nm-hsic.c new file mode 100644 index 0000000..83e0d4d --- /dev/null +++ b/drivers/phy/phy-pxa-28nm-hsic.c @@ -0,0 +1,193 @@ +/* + * Copyright (C) 2015 Linaro, Ltd. + * Rob Herring + * + * Based on vendor driver: + * Copyright (C) 2013 Marvell Inc. + * Author: Chao Xie + * + * 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 +#include + +#define PHY_28NM_HSIC_CTRL 0x08 +#define PHY_28NM_HSIC_IMPCAL_CAL 0x18 +#define PHY_28NM_HSIC_PLL_CTRL01 0x1c +#define PHY_28NM_HSIC_PLL_CTRL2 0x20 +#define PHY_28NM_HSIC_INT 0x28 + +#define PHY_28NM_HSIC_PLL_SELLPFR_SHIFT 26 +#define PHY_28NM_HSIC_PLL_FBDIV_SHIFT 0 +#define PHY_28NM_HSIC_PLL_REFDIV_SHIFT 9 + +#define PHY_28NM_HSIC_S2H_PU_PLL BIT(10) +#define PHY_28NM_HSIC_H2S_PLL_LOCK BIT(15) +#define PHY_28NM_HSIC_S2H_HSIC_EN BIT(7) +#define S2H_DRV_SE0_4RESUME BIT(14) +#define PHY_28NM_HSIC_H2S_IMPCAL_DONE BIT(27) + +#define PHY_28NM_HSIC_CONNECT_INT BIT(1) +#define PHY_28NM_HSIC_HS_READY_INT BIT(2) + +struct mv_hsic_phy { + struct phy *phy; + struct platform_device *pdev; + void __iomem *base; + struct clk *clk; +}; + +static bool wait_for_reg(void __iomem *reg, u32 mask, unsigned long timeout) +{ + timeout += jiffies; + while (time_is_after_eq_jiffies(timeout)) { + if ((readl(reg) & mask) == mask) + return true; + msleep(1); + } + return false; +} + +static int mv_hsic_phy_power_on(struct phy *phy) +{ + struct mv_hsic_phy *mv_phy = phy_get_drvdata(phy); + struct platform_device *pdev = mv_phy->pdev; + void __iomem *base = mv_phy->base; + + clk_prepare_enable(mv_phy->clk); + + /* Set reference clock */ + writel(0x1 << PHY_28NM_HSIC_PLL_SELLPFR_SHIFT | + 0xf0 << PHY_28NM_HSIC_PLL_FBDIV_SHIFT | + 0xd << PHY_28NM_HSIC_PLL_REFDIV_SHIFT, + base + PHY_28NM_HSIC_PLL_CTRL01); + + /* Turn on PLL */ + writel(readl(base + PHY_28NM_HSIC_PLL_CTRL2) | + PHY_28NM_HSIC_S2H_PU_PLL, + base + PHY_28NM_HSIC_PLL_CTRL2); + + /* Make sure PHY PLL is locked */ + if (!wait_for_reg(base + PHY_28NM_HSIC_PLL_CTRL2, + PHY_28NM_HSIC_H2S_PLL_LOCK, HZ / 10)) { + dev_err(&pdev->dev, "HSIC PHY PLL not locked after 100mS."); + return -ETIMEDOUT; + } + + /* Avoid SE0 state when resume for some device will take it as reset */ + writel(readl(base + PHY_28NM_HSIC_CTRL) & ~S2H_DRV_SE0_4RESUME, + base + PHY_28NM_HSIC_CTRL); + + /* Enable HSIC PHY */ + writel(readl(base + PHY_28NM_HSIC_CTRL) | PHY_28NM_HSIC_S2H_HSIC_EN, + base + PHY_28NM_HSIC_CTRL); + + /* Calibration Timing + * ____________________________ + * CAL START ___| + * ____________________ + * CAL_DONE ___________| + * | 400us | + */ + + /* Make sure PHY Calibration is ready */ + if (!wait_for_reg(base + PHY_28NM_HSIC_IMPCAL_CAL, + PHY_28NM_HSIC_H2S_IMPCAL_DONE, HZ / 10)) { + dev_warn(&pdev->dev, "HSIC PHY READY not set after 100mS."); + return -ETIMEDOUT; + } + + /* Waiting for HSIC connect int*/ + if (!wait_for_reg(base + PHY_28NM_HSIC_INT, + PHY_28NM_HSIC_CONNECT_INT, HZ / 5)) { + dev_warn(&pdev->dev, "HSIC wait for connect interrupt timeout."); + return -ETIMEDOUT; + } + + return 0; +} + +static int mv_hsic_phy_power_off(struct phy *phy) +{ + struct mv_hsic_phy *mv_phy = phy_get_drvdata(phy); + void __iomem *base = mv_phy->base; + + writel(readl(base + PHY_28NM_HSIC_CTRL) & ~PHY_28NM_HSIC_S2H_HSIC_EN, + base + PHY_28NM_HSIC_CTRL); + + clk_disable_unprepare(mv_phy->clk); + return 0; +} + +static const struct phy_ops hsic_ops = { + .power_on = mv_hsic_phy_power_on, + .power_off = mv_hsic_phy_power_off, +}; + +static int mv_hsic_phy_probe(struct platform_device *pdev) +{ + struct phy_provider *phy_provider; + struct mv_hsic_phy *mv_phy; + struct resource *r; + + mv_phy = devm_kzalloc(&pdev->dev, sizeof(*mv_phy), GFP_KERNEL); + if (!mv_phy) + return -ENOMEM; + + mv_phy->pdev = pdev; + + mv_phy->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(mv_phy->clk)) { + dev_err(&pdev->dev, "failed to get clock.\n"); + return PTR_ERR(mv_phy->clk); + } + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + mv_phy->base = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(mv_phy->base)) + return PTR_ERR(mv_phy->base); + + mv_phy->phy = devm_phy_create(&pdev->dev, pdev->dev.of_node, &hsic_ops); + if (IS_ERR(mv_phy->phy)) + return PTR_ERR(mv_phy->phy); + + phy_set_drvdata(mv_phy->phy, mv_phy); + + phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate); + return PTR_ERR_OR_ZERO(phy_provider); +} + +static const struct of_device_id mv_hsic_phy_dt_match[] = { + { .compatible = "marvell,pxa1928-hsic-phy", }, + {}, +}; +MODULE_DEVICE_TABLE(of, mv_hsic_phy_dt_match); + +static struct platform_driver mv_hsic_phy_driver = { + .probe = mv_hsic_phy_probe, + .driver = { + .name = "mv-hsic-phy", + .of_match_table = of_match_ptr(mv_hsic_phy_dt_match), + }, +}; +module_platform_driver(mv_hsic_phy_driver); + +MODULE_AUTHOR("Rob Herring "); +MODULE_DESCRIPTION("Marvell HSIC phy driver"); +MODULE_LICENSE("GPL v2"); -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/