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 <david@xxxxxxxxxxxxxx> --- v2 changes: This is new patch in v2. drivers/phy/Kconfig | 9 ++ drivers/phy/Makefile | 1 + drivers/phy/phy-da8xx-usb.c | 295 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 305 insertions(+) create mode 100644 drivers/phy/phy-da8xx-usb.c diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 26566db..a6060ea 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -35,6 +35,15 @@ 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 + 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..93a5f4d --- /dev/null +++ b/drivers/phy/phy-da8xx-usb.c @@ -0,0 +1,295 @@ +/* + * phy-da8xx-usb - TI DaVinci DA8XX USB PHY driver + * + * Copyright (C) 2016 David Lechner <david@xxxxxxxxxxxxxx> + * + * 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 <linux/clk.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/module.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> +#include <linux/usb/gadget.h> +#include <linux/usb/musb.h> +#include <linux/usb/otg.h> + +/* DA8xx CFGCHIP2 (USB PHY Control) register bits */ +#define PHYCLKGD (1 << 17) +#define VBUSSENSE (1 << 16) +#define RESET (1 << 15) +#define OTGMODE_MASK (3 << 13) +#define NO_OVERRIDE (0 << 13) +#define FORCE_HOST (1 << 13) +#define FORCE_DEVICE (2 << 13) +#define FORCE_HOST_VBUS_LOW (3 << 13) +#define USB1PHYCLKMUX (1 << 12) +#define USB2PHYCLKMUX (1 << 11) +#define PHYPWRDN (1 << 10) +#define OTGPWRDN (1 << 9) +#define DATPOL (1 << 8) +#define USB1SUSPENDM (1 << 7) +#define PHY_PLLON (1 << 6) +#define SESENDEN (1 << 5) +#define VBDTCTEN (1 << 4) +#define REFFREQ_MASK (0xf << 0) +#define REFFREQ_12MHZ (1 << 0) +#define REFFREQ_24MHZ (2 << 0) +#define REFFREQ_48MHZ (3 << 0) +#define REFFREQ_19_2MHZ (4 << 0) +#define REFFREQ_38_4MHZ (5 << 0) +#define REFFREQ_13MHZ (6 << 0) +#define REFFREQ_26MHZ (7 << 0) +#define REFFREQ_20MHZ (8 << 0) +#define REFFREQ_40MHZ (9 << 0) + +struct da8xx_usbphy { + struct phy_provider *phy_provider; + struct phy *usb11_phy; + struct phy *usb20_phy; + struct clk *usb11_clk; + struct clk *usb20_clk; + void __iomem *phy_ctrl; +}; + +static inline u32 da8xx_usbphy_readl(void __iomem *base) +{ + return readl(base); +} + +static inline void da8xx_usbphy_writel(void __iomem *base, u32 value) +{ + writel(value, base); +} + +static int da8xx_usb11_phy_init(struct phy *phy) +{ + struct da8xx_usbphy *d_phy = phy_get_drvdata(phy); + int ret; + u32 val; + + ret = clk_prepare_enable(d_phy->usb11_clk); + if (ret) + return ret; + + val = da8xx_usbphy_readl(d_phy->phy_ctrl); + val |= USB1SUSPENDM; + da8xx_usbphy_writel(d_phy->phy_ctrl, val); + + return 0; +} + +static int da8xx_usb11_phy_shutdown(struct phy *phy) +{ + struct da8xx_usbphy *d_phy = phy_get_drvdata(phy); + u32 val; + + val = da8xx_usbphy_readl(d_phy->phy_ctrl); + val &= ~USB1SUSPENDM; + da8xx_usbphy_writel(d_phy->phy_ctrl, val); + + clk_disable_unprepare(d_phy->usb11_clk); + + return 0; +} + +static const struct phy_ops da8xx_usb11_phy_ops = { + .power_on = da8xx_usb11_phy_init, + .power_off = da8xx_usb11_phy_shutdown, + .owner = THIS_MODULE, +}; + +static int da8xx_usb20_phy_init(struct phy *phy) +{ + struct da8xx_usbphy *d_phy = phy_get_drvdata(phy); + int ret; + u32 val; + + ret = clk_prepare_enable(d_phy->usb20_clk); + if (ret) + return ret; + + val = da8xx_usbphy_readl(d_phy->phy_ctrl); + val &= ~OTGPWRDN; + da8xx_usbphy_writel(d_phy->phy_ctrl, val); + + return 0; +} + +static int da8xx_usb20_phy_shutdown(struct phy *phy) +{ + struct da8xx_usbphy *d_phy = phy_get_drvdata(phy); + u32 val; + + val = da8xx_usbphy_readl(d_phy->phy_ctrl); + val |= OTGPWRDN; + da8xx_usbphy_writel(d_phy->phy_ctrl, val); + + 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; + + val = da8xx_usbphy_readl(d_phy->phy_ctrl); + + val &= ~OTGMODE_MASK; + switch (mode) { + case MUSB_HOST: /* Force VBUS valid, ID = 0 */ + val |= FORCE_HOST; + break; + case MUSB_PERIPHERAL: /* Force VBUS valid, ID = 1 */ + val |= FORCE_DEVICE; + break; + case MUSB_OTG: /* Don't override the VBUS/ID comparators */ + val |= NO_OVERRIDE; + break; + default: + return -EINVAL; + } + + da8xx_usbphy_writel(d_phy->phy_ctrl, 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; + struct resource *res; + + d_phy = devm_kzalloc(dev, sizeof(*d_phy), GFP_KERNEL); + if (!d_phy) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + d_phy->phy_ctrl = devm_ioremap_resource(dev, res); + if (IS_ERR(d_phy->phy_ctrl)) { + dev_err(dev, "Failed to map resource.\n"); + return PTR_ERR(d_phy->phy_ctrl); + } + + 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 <david@xxxxxxxxxxxxxx>"); +MODULE_DESCRIPTION("TI DA8XX USB PHY driver"); +MODULE_LICENSE("GPL v2"); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html