+++ /dev/null
-/* linux/drivers/usb/phy/phy-samsung-usb2.c
- *
- * Copyright (c) 2012 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * Author: Praveen Paneri <p.paneri@samsung.com>
- *
- * Samsung USB2.0 PHY transceiver; talks to S3C HS OTG controller, EHCI-S5P and
- * OHCI-EXYNOS controllers.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * 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 <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/of.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/samsung_usb_phy.h>
-#include <linux/platform_data/samsung-usbphy.h>
-
-#include "phy-samsung-usb.h"
-
-static int samsung_usbphy_set_host(struct usb_otg *otg, struct usb_bus *host)
-{
- if (!otg)
- return -ENODEV;
-
- if (!otg->host)
- otg->host = host;
-
- return 0;
-}
-
-static bool exynos5_phyhost_is_on(void __iomem *regs)
-{
- u32 reg;
-
- reg = readl(regs + EXYNOS5_PHY_HOST_CTRL0);
-
- return !(reg & HOST_CTRL0_SIDDQ);
-}
-
-static void samsung_exynos5_usb2phy_enable(struct samsung_usbphy *sphy)
-{
- void __iomem *regs = sphy->regs;
- u32 phyclk = sphy->ref_clk_freq;
- u32 phyhost;
- u32 phyotg;
- u32 phyhsic;
- u32 ehcictrl;
- u32 ohcictrl;
-
- /*
- * phy_usage helps in keeping usage count for phy
- * so that the first consumer enabling the phy is also
- * the last consumer to disable it.
- */
-
- atomic_inc(&sphy->phy_usage);
-
- if (exynos5_phyhost_is_on(regs)) {
- dev_info(sphy->dev, "Already power on PHY\n");
- return;
- }
-
- /* Host configuration */
- phyhost = readl(regs + EXYNOS5_PHY_HOST_CTRL0);
-
- /* phy reference clock configuration */
- phyhost &= ~HOST_CTRL0_FSEL_MASK;
- phyhost |= HOST_CTRL0_FSEL(phyclk);
-
- /* host phy reset */
- phyhost &= ~(HOST_CTRL0_PHYSWRST |
- HOST_CTRL0_PHYSWRSTALL |
- HOST_CTRL0_SIDDQ |
- /* Enable normal mode of operation */
- HOST_CTRL0_FORCESUSPEND |
- HOST_CTRL0_FORCESLEEP);
-
- /* Link reset */
- phyhost |= (HOST_CTRL0_LINKSWRST |
- HOST_CTRL0_UTMISWRST |
- /* COMMON Block configuration during suspend */
- HOST_CTRL0_COMMONON_N);
- writel(phyhost, regs + EXYNOS5_PHY_HOST_CTRL0);
- udelay(10);
- phyhost &= ~(HOST_CTRL0_LINKSWRST |
- HOST_CTRL0_UTMISWRST);
- writel(phyhost, regs + EXYNOS5_PHY_HOST_CTRL0);
-
- /* OTG configuration */
- phyotg = readl(regs + EXYNOS5_PHY_OTG_SYS);
-
- /* phy reference clock configuration */
- phyotg &= ~OTG_SYS_FSEL_MASK;
- phyotg |= OTG_SYS_FSEL(phyclk);
-
- /* Enable normal mode of operation */
- phyotg &= ~(OTG_SYS_FORCESUSPEND |
- OTG_SYS_SIDDQ_UOTG |
- OTG_SYS_FORCESLEEP |
- OTG_SYS_REFCLKSEL_MASK |
- /* COMMON Block configuration during suspend */
- OTG_SYS_COMMON_ON);
-
- /* OTG phy & link reset */
- phyotg |= (OTG_SYS_PHY0_SWRST |
- OTG_SYS_LINKSWRST_UOTG |
- OTG_SYS_PHYLINK_SWRESET |
- OTG_SYS_OTGDISABLE |
- /* Set phy refclk */
- OTG_SYS_REFCLKSEL_CLKCORE);
-
- writel(phyotg, regs + EXYNOS5_PHY_OTG_SYS);
- udelay(10);
- phyotg &= ~(OTG_SYS_PHY0_SWRST |
- OTG_SYS_LINKSWRST_UOTG |
- OTG_SYS_PHYLINK_SWRESET);
- writel(phyotg, regs + EXYNOS5_PHY_OTG_SYS);
-
- /* HSIC phy configuration */
- phyhsic = (HSIC_CTRL_REFCLKDIV_12 |
- HSIC_CTRL_REFCLKSEL |
- HSIC_CTRL_PHYSWRST);
- writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL1);
- writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL2);
- udelay(10);
- phyhsic &= ~HSIC_CTRL_PHYSWRST;
- writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL1);
- writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL2);
-
- udelay(80);
-
- /* enable EHCI DMA burst */
- ehcictrl = readl(regs + EXYNOS5_PHY_HOST_EHCICTRL);
- ehcictrl |= (HOST_EHCICTRL_ENAINCRXALIGN |
- HOST_EHCICTRL_ENAINCR4 |
- HOST_EHCICTRL_ENAINCR8 |
- HOST_EHCICTRL_ENAINCR16);
- writel(ehcictrl, regs + EXYNOS5_PHY_HOST_EHCICTRL);
-
- /* set ohci_suspend_on_n */
- ohcictrl = readl(regs + EXYNOS5_PHY_HOST_OHCICTRL);
- ohcictrl |= HOST_OHCICTRL_SUSPLGCY;
- writel(ohcictrl, regs + EXYNOS5_PHY_HOST_OHCICTRL);
-}
-
-static void samsung_usb2phy_enable(struct samsung_usbphy *sphy)
-{
- void __iomem *regs = sphy->regs;
- u32 phypwr;
- u32 phyclk;
- u32 rstcon;
-
- /* set clock frequency for PLL */
- phyclk = sphy->ref_clk_freq;
- phypwr = readl(regs + SAMSUNG_PHYPWR);
- rstcon = readl(regs + SAMSUNG_RSTCON);
-
- switch (sphy->drv_data->cpu_type) {
- case TYPE_S3C64XX:
- phyclk &= ~PHYCLK_COMMON_ON_N;
- phypwr &= ~PHYPWR_NORMAL_MASK;
- rstcon |= RSTCON_SWRST;
- break;
- case TYPE_EXYNOS4X12:
- phypwr &= ~(PHYPWR_NORMAL_MASK_HSIC0 |
- PHYPWR_NORMAL_MASK_HSIC1 |
- PHYPWR_NORMAL_MASK_PHY1);
- rstcon |= RSTCON_HOSTPHY_SWRST;
- case TYPE_EXYNOS4210:
- phypwr &= ~PHYPWR_NORMAL_MASK_PHY0;
- rstcon |= RSTCON_SWRST;
- default:
- break;
- }
-
- writel(phyclk, regs + SAMSUNG_PHYCLK);
- /* Configure PHY0 for normal operation*/
- writel(phypwr, regs + SAMSUNG_PHYPWR);
- /* reset all ports of PHY and Link */
- writel(rstcon, regs + SAMSUNG_RSTCON);
- udelay(10);
- if (sphy->drv_data->cpu_type == TYPE_EXYNOS4X12)
- rstcon &= ~RSTCON_HOSTPHY_SWRST;
- rstcon &= ~RSTCON_SWRST;
- writel(rstcon, regs + SAMSUNG_RSTCON);
-}
-
-static void samsung_exynos5_usb2phy_disable(struct samsung_usbphy *sphy)
-{
- void __iomem *regs = sphy->regs;
- u32 phyhost;
- u32 phyotg;
- u32 phyhsic;
-
- if (atomic_dec_return(&sphy->phy_usage) > 0) {
- dev_info(sphy->dev, "still being used\n");
- return;
- }
-
- phyhsic = (HSIC_CTRL_REFCLKDIV_12 |
- HSIC_CTRL_REFCLKSEL |
- HSIC_CTRL_SIDDQ |
- HSIC_CTRL_FORCESLEEP |
- HSIC_CTRL_FORCESUSPEND);
- writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL1);
- writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL2);
-
- phyhost = readl(regs + EXYNOS5_PHY_HOST_CTRL0);
- phyhost |= (HOST_CTRL0_SIDDQ |
- HOST_CTRL0_FORCESUSPEND |
- HOST_CTRL0_FORCESLEEP |
- HOST_CTRL0_PHYSWRST |
- HOST_CTRL0_PHYSWRSTALL);
- writel(phyhost, regs + EXYNOS5_PHY_HOST_CTRL0);
-
- phyotg = readl(regs + EXYNOS5_PHY_OTG_SYS);
- phyotg |= (OTG_SYS_FORCESUSPEND |
- OTG_SYS_SIDDQ_UOTG |
- OTG_SYS_FORCESLEEP);
- writel(phyotg, regs + EXYNOS5_PHY_OTG_SYS);
-}
-
-static void samsung_usb2phy_disable(struct samsung_usbphy *sphy)
-{
- void __iomem *regs = sphy->regs;
- u32 phypwr;
-
- phypwr = readl(regs + SAMSUNG_PHYPWR);
-
- switch (sphy->drv_data->cpu_type) {
- case TYPE_S3C64XX:
- phypwr |= PHYPWR_NORMAL_MASK;
- break;
- case TYPE_EXYNOS4X12:
- phypwr |= (PHYPWR_NORMAL_MASK_HSIC0 |
- PHYPWR_NORMAL_MASK_HSIC1 |
- PHYPWR_NORMAL_MASK_PHY1);
- case TYPE_EXYNOS4210:
- phypwr |= PHYPWR_NORMAL_MASK_PHY0;
- default:
- break;
- }
-
- /* Disable analog and otg block power */
- writel(phypwr, regs + SAMSUNG_PHYPWR);
-}
-
-/*
- * The function passed to the usb driver for phy initialization
- */
-static int samsung_usb2phy_init(struct usb_phy *phy)
-{
- struct samsung_usbphy *sphy;
- struct usb_bus *host = NULL;
- unsigned long flags;
- int ret = 0;
-
- sphy = phy_to_sphy(phy);
-
- host = phy->otg->host;
-
- /* Enable the phy clock */
- ret = clk_prepare_enable(sphy->clk);
- if (ret) {
- dev_err(sphy->dev, "%s: clk_prepare_enable failed\n", __func__);
- return ret;
- }
-
- spin_lock_irqsave(&sphy->lock, flags);
-
- if (host) {
- /* setting default phy-type for USB 2.0 */
- if (!strstr(dev_name(host->controller), "ehci") ||
- !strstr(dev_name(host->controller), "ohci"))
- samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_HOST);
- } else {
- samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_DEVICE);
- }
-
- /* Disable phy isolation */
- if (sphy->plat && sphy->plat->pmu_isolation)
- sphy->plat->pmu_isolation(false);
- else if (sphy->drv_data->set_isolation)
- sphy->drv_data->set_isolation(sphy, false);
-
- /* Selecting Host/OTG mode; After reset USB2.0PHY_CFG: HOST */
- samsung_usbphy_cfg_sel(sphy);
-
- /* Initialize usb phy registers */
- sphy->drv_data->phy_enable(sphy);
-
- spin_unlock_irqrestore(&sphy->lock, flags);
-
- /* Disable the phy clock */
- clk_disable_unprepare(sphy->clk);
-
- return ret;
-}
-
-/*
- * The function passed to the usb driver for phy shutdown
- */
-static void samsung_usb2phy_shutdown(struct usb_phy *phy)
-{
- struct samsung_usbphy *sphy;
- struct usb_bus *host = NULL;
- unsigned long flags;
-
- sphy = phy_to_sphy(phy);
-
- host = phy->otg->host;
-
- if (clk_prepare_enable(sphy->clk)) {
- dev_err(sphy->dev, "%s: clk_prepare_enable failed\n", __func__);
- return;
- }
-
- spin_lock_irqsave(&sphy->lock, flags);
-
- if (host) {
- /* setting default phy-type for USB 2.0 */
- if (!strstr(dev_name(host->controller), "ehci") ||
- !strstr(dev_name(host->controller), "ohci"))
- samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_HOST);
- } else {
- samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_DEVICE);
- }
-
- /* De-initialize usb phy registers */
- sphy->drv_data->phy_disable(sphy);
-
- /* Enable phy isolation */
- if (sphy->plat && sphy->plat->pmu_isolation)
- sphy->plat->pmu_isolation(true);
- else if (sphy->drv_data->set_isolation)
- sphy->drv_data->set_isolation(sphy, true);
-
- spin_unlock_irqrestore(&sphy->lock, flags);
-
- clk_disable_unprepare(sphy->clk);
-}
-
-static int samsung_usb2phy_probe(struct platform_device *pdev)
-{
- struct samsung_usbphy *sphy;
- struct usb_otg *otg;
- struct samsung_usbphy_data *pdata = dev_get_platdata(&pdev->dev);
- const struct samsung_usbphy_drvdata *drv_data;
- struct device *dev = &pdev->dev;
- struct resource *phy_mem;
- void __iomem *phy_base;
- struct clk *clk;
- int ret;
-
- phy_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- phy_base = devm_ioremap_resource(dev, phy_mem);
- if (IS_ERR(phy_base))
- return PTR_ERR(phy_base);
-
- sphy = devm_kzalloc(dev, sizeof(*sphy), GFP_KERNEL);
- if (!sphy)
- return -ENOMEM;
-
- otg = devm_kzalloc(dev, sizeof(*otg), GFP_KERNEL);
- if (!otg)
- return -ENOMEM;
-
- drv_data = samsung_usbphy_get_driver_data(pdev);
-
- if (drv_data->cpu_type == TYPE_EXYNOS5250)
- clk = devm_clk_get(dev, "usbhost");
- else
- clk = devm_clk_get(dev, "otg");
-
- if (IS_ERR(clk)) {
- dev_err(dev, "Failed to get usbhost/otg clock\n");
- return PTR_ERR(clk);
- }
-
- sphy->dev = dev;
-
- if (dev->of_node) {
- ret = samsung_usbphy_parse_dt(sphy);
- if (ret < 0)
- return ret;
- } else {
- if (!pdata) {
- dev_err(dev, "no platform data specified\n");
- return -EINVAL;
- }
- }
-
- sphy->plat = pdata;
- sphy->regs = phy_base;
- sphy->clk = clk;
- sphy->drv_data = drv_data;
- sphy->phy.dev = sphy->dev;
- sphy->phy.label = "samsung-usb2phy";
- sphy->phy.type = USB_PHY_TYPE_USB2;
- sphy->phy.init = samsung_usb2phy_init;
- sphy->phy.shutdown = samsung_usb2phy_shutdown;
-
- sphy->ref_clk_freq = samsung_usbphy_get_refclk_freq(sphy);
- if (sphy->ref_clk_freq < 0)
- return -EINVAL;
-
- sphy->phy.otg = otg;
- sphy->phy.otg->phy = &sphy->phy;
- sphy->phy.otg->set_host = samsung_usbphy_set_host;
-
- spin_lock_init(&sphy->lock);
-
- platform_set_drvdata(pdev, sphy);
-
- return usb_add_phy_dev(&sphy->phy);
-}
-
-static int samsung_usb2phy_remove(struct platform_device *pdev)
-{
- struct samsung_usbphy *sphy = platform_get_drvdata(pdev);
-
- usb_remove_phy(&sphy->phy);
-
- if (sphy->pmuregs)
- iounmap(sphy->pmuregs);
- if (sphy->sysreg)
- iounmap(sphy->sysreg);
-
- return 0;
-}
-
-static const struct samsung_usbphy_drvdata usb2phy_s3c64xx = {
- .cpu_type = TYPE_S3C64XX,
- .devphy_en_mask = S3C64XX_USBPHY_ENABLE,
- .rate_to_clksel = samsung_usbphy_rate_to_clksel_64xx,
- .set_isolation = NULL, /* TODO */
- .phy_enable = samsung_usb2phy_enable,
- .phy_disable = samsung_usb2phy_disable,
-};
-
-static const struct samsung_usbphy_drvdata usb2phy_exynos4 = {
- .cpu_type = TYPE_EXYNOS4210,
- .devphy_en_mask = EXYNOS_USBPHY_ENABLE,
- .hostphy_en_mask = EXYNOS_USBPHY_ENABLE,
- .rate_to_clksel = samsung_usbphy_rate_to_clksel_64xx,
- .set_isolation = samsung_usbphy_set_isolation_4210,
- .phy_enable = samsung_usb2phy_enable,
- .phy_disable = samsung_usb2phy_disable,
-};
-
-static const struct samsung_usbphy_drvdata usb2phy_exynos4x12 = {
- .cpu_type = TYPE_EXYNOS4X12,
- .devphy_en_mask = EXYNOS_USBPHY_ENABLE,
- .hostphy_en_mask = EXYNOS_USBPHY_ENABLE,
- .rate_to_clksel = samsung_usbphy_rate_to_clksel_4x12,
- .set_isolation = samsung_usbphy_set_isolation_4210,
- .phy_enable = samsung_usb2phy_enable,
- .phy_disable = samsung_usb2phy_disable,
-};
-
-static struct samsung_usbphy_drvdata usb2phy_exynos5 = {
- .cpu_type = TYPE_EXYNOS5250,
- .hostphy_en_mask = EXYNOS_USBPHY_ENABLE,
- .hostphy_reg_offset = EXYNOS_USBHOST_PHY_CTRL_OFFSET,
- .rate_to_clksel = samsung_usbphy_rate_to_clksel_4x12,
- .set_isolation = samsung_usbphy_set_isolation_4210,
- .phy_enable = samsung_exynos5_usb2phy_enable,
- .phy_disable = samsung_exynos5_usb2phy_disable,
-};
-
-#ifdef CONFIG_OF
-static const struct of_device_id samsung_usbphy_dt_match[] = {
- {
- .compatible = "samsung,s3c64xx-usb2phy",
- .data = &usb2phy_s3c64xx,
- }, {
- .compatible = "samsung,exynos4210-usb2phy",
- .data = &usb2phy_exynos4,
- }, {
- .compatible = "samsung,exynos4x12-usb2phy",
- .data = &usb2phy_exynos4x12,
- }, {
- .compatible = "samsung,exynos5250-usb2phy",
- .data = &usb2phy_exynos5
- },
- {},
-};
-MODULE_DEVICE_TABLE(of, samsung_usbphy_dt_match);
-#endif
-
-static struct platform_device_id samsung_usbphy_driver_ids[] = {
- {
- .name = "s3c64xx-usb2phy",
- .driver_data = (unsigned long)&usb2phy_s3c64xx,
- }, {
- .name = "exynos4210-usb2phy",
- .driver_data = (unsigned long)&usb2phy_exynos4,
- }, {
- .name = "exynos4x12-usb2phy",
- .driver_data = (unsigned long)&usb2phy_exynos4x12,
- }, {
- .name = "exynos5250-usb2phy",
- .driver_data = (unsigned long)&usb2phy_exynos5,
- },
- {},
-};
-
-MODULE_DEVICE_TABLE(platform, samsung_usbphy_driver_ids);
-
-static struct platform_driver samsung_usb2phy_driver = {
- .probe = samsung_usb2phy_probe,
- .remove = samsung_usb2phy_remove,
- .id_table = samsung_usbphy_driver_ids,
- .driver = {
- .name = "samsung-usb2phy",
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(samsung_usbphy_dt_match),
- },
-};
-
-module_platform_driver(samsung_usb2phy_driver);
-
-MODULE_DESCRIPTION("Samsung USB 2.0 phy controller");
-MODULE_AUTHOR("Praveen Paneri <p.paneri@samsung.com>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:samsung-usb2phy");
projects / platform / kernel / linux-exynos.git / commitdiff