usb: phy: Add AM335x PHY driver (3bb869c8) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/usb/phy/Kconfig

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		@@ -86,6 +86,18 @@ config OMAP_USB3
		This driver interacts with the "OMAP Control USB Driver" to power
		on/off the PHY.

		config AM335X_CONTROL_USB
		tristate

		config AM335X_PHY_USB
		tristate "AM335x USB PHY Driver"
		select USB_PHY
		select AM335X_CONTROL_USB
		select NOP_USB_XCEIV
		help
		This driver provides PHY support for that phy which part for the
		AM335x SoC.

		config SAMSUNG_USBPHY
		tristate
		help

drivers/usb/phy/Makefile

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		@@ -16,6 +16,8 @@ obj-$(CONFIG_ISP1301_OMAP) += phy-isp1301-omap.o
		obj-$(CONFIG_MV_U3D_PHY) += phy-mv-u3d-usb.o
		obj-$(CONFIG_NOP_USB_XCEIV) += phy-generic.o
		obj-$(CONFIG_OMAP_CONTROL_USB) += phy-omap-control.o
		obj-$(CONFIG_AM335X_CONTROL_USB) += phy-am335x-control.o
		obj-$(CONFIG_AM335X_PHY_USB) += phy-am335x.o
		obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o
		obj-$(CONFIG_OMAP_USB3) += phy-omap-usb3.o
		obj-$(CONFIG_SAMSUNG_USBPHY) += phy-samsung-usb.o

drivers/usb/phy/am35x-phy-control.h

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		#ifndef _AM335x_PHY_CONTROL_H_
		#define _AM335x_PHY_CONTROL_H_

		struct phy_control {
		void (phy_power)(struct phy_control phy_ctrl, u32 id, bool on);
		void (phy_wkup)(struct phy_control phy_ctrl, u32 id, bool on);
		};

		static inline void phy_ctrl_power(struct phy_control *phy_ctrl, u32 id, bool on)
		{
		phy_ctrl->phy_power(phy_ctrl, id, on);
		}

		static inline void phy_ctrl_wkup(struct phy_control *phy_ctrl, u32 id, bool on)
		{
		phy_ctrl->phy_wkup(phy_ctrl, id, on);
		}

		struct phy_control am335x_get_phy_control(struct device dev);

		#endif

drivers/usb/phy/phy-am335x-control.c

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		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/of.h>
		#include <linux/io.h>

		struct phy_control {
		void (phy_power)(struct phy_control phy_ctrl, u32 id, bool on);
		void (phy_wkup)(struct phy_control phy_ctrl, u32 id, bool on);
		};

		struct am335x_control_usb {
		struct device *dev;
		void __iomem *phy_reg;
		void __iomem *wkup;
		spinlock_t lock;
		struct phy_control phy_ctrl;
		};

		#define AM335X_USB0_CTRL 0x0
		#define AM335X_USB1_CTRL 0x8
		#define AM335x_USB_WKUP 0x0

		#define USBPHY_CM_PWRDN (1 << 0)
		#define USBPHY_OTG_PWRDN (1 << 1)
		#define USBPHY_OTGVDET_EN (1 << 19)
		#define USBPHY_OTGSESSEND_EN (1 << 20)

		static void am335x_phy_power(struct phy_control *phy_ctrl, u32 id, bool on)
		{
		struct am335x_control_usb *usb_ctrl;
		u32 val;
		u32 reg;

		usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl);

		switch (id) {
		case 0:
		reg = AM335X_USB0_CTRL;
		break;
		case 1:
		reg = AM335X_USB1_CTRL;
		break;
		default:
		__WARN();
		return;
		}

		val = readl(usb_ctrl->phy_reg + reg);
		if (on) {
		val &= ~(USBPHY_CM_PWRDN \| USBPHY_OTG_PWRDN);
		val \|= USBPHY_OTGVDET_EN \| USBPHY_OTGSESSEND_EN;
		} else {
		val \|= USBPHY_CM_PWRDN \| USBPHY_OTG_PWRDN;
		}

		writel(val, usb_ctrl->phy_reg + reg);
		}

		static const struct phy_control ctrl_am335x = {
		.phy_power = am335x_phy_power,
		};

		static const struct of_device_id omap_control_usb_id_table[] = {
		{ .compatible = "ti,am335x-usb-ctrl-module", .data = &ctrl_am335x },
		{}
		};
		MODULE_DEVICE_TABLE(of, omap_control_usb_id_table);

		static struct platform_driver am335x_control_driver;
		static int match(struct device dev, void data)
		{
		struct device_node node = (struct device_node )data;
		return dev->of_node == node &&
		dev->driver == &am335x_control_driver.driver;
		}

		struct phy_control am335x_get_phy_control(struct device dev)
		{
		struct device_node *node;
		struct am335x_control_usb *ctrl_usb;

		node = of_parse_phandle(dev->of_node, "ti,ctrl_mod", 0);
		if (!node)
		return NULL;

		dev = bus_find_device(&platform_bus_type, NULL, node, match);
		ctrl_usb = dev_get_drvdata(dev);
		if (!ctrl_usb)
		return NULL;
		return &ctrl_usb->phy_ctrl;
		}
		EXPORT_SYMBOL_GPL(am335x_get_phy_control);

		static int am335x_control_usb_probe(struct platform_device *pdev)
		{
		struct resource *res;
		struct am335x_control_usb *ctrl_usb;
		const struct of_device_id *of_id;
		const struct phy_control *phy_ctrl;

		of_id = of_match_node(omap_control_usb_id_table, pdev->dev.of_node);
		if (!of_id)
		return -EINVAL;

		phy_ctrl = of_id->data;

		ctrl_usb = devm_kzalloc(&pdev->dev, sizeof(*ctrl_usb), GFP_KERNEL);
		if (!ctrl_usb) {
		dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
		return -ENOMEM;
		}

		ctrl_usb->dev = &pdev->dev;

		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
		ctrl_usb->phy_reg = devm_ioremap_resource(&pdev->dev, res);
		if (IS_ERR(ctrl_usb->phy_reg))
		return PTR_ERR(ctrl_usb->phy_reg);
		spin_lock_init(&ctrl_usb->lock);
		ctrl_usb->phy_ctrl = *phy_ctrl;

		dev_set_drvdata(ctrl_usb->dev, ctrl_usb);
		return 0;
		}

		static struct platform_driver am335x_control_driver = {
		.probe = am335x_control_usb_probe,
		.driver = {
		.name = "am335x-control-usb",
		.owner = THIS_MODULE,
		.of_match_table = of_match_ptr(omap_control_usb_id_table),
		},
		};

		module_platform_driver(am335x_control_driver);
		MODULE_LICENSE("GPL v2");

drivers/usb/phy/phy-am335x.c

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		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/dma-mapping.h>
		#include <linux/usb/otg.h>
		#include <linux/usb/usb_phy_gen_xceiv.h>
		#include <linux/slab.h>
		#include <linux/clk.h>
		#include <linux/regulator/consumer.h>
		#include <linux/of.h>
		#include <linux/of_address.h>

		#include "am35x-phy-control.h"
		#include "phy-generic.h"

		struct am335x_phy {
		struct usb_phy_gen_xceiv usb_phy_gen;
		struct phy_control *phy_ctrl;
		int id;
		};

		static int am335x_init(struct usb_phy *phy)
		{
		struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);

		phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, true);
		return 0;
		}

		static void am335x_shutdown(struct usb_phy *phy)
		{
		struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);

		phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false);
		}

		static int am335x_phy_probe(struct platform_device *pdev)
		{
		struct am335x_phy *am_phy;
		struct device *dev = &pdev->dev;
		int ret;

		am_phy = devm_kzalloc(dev, sizeof(*am_phy), GFP_KERNEL);
		if (!am_phy)
		return -ENOMEM;

		am_phy->phy_ctrl = am335x_get_phy_control(dev);
		if (!am_phy->phy_ctrl)
		return -EPROBE_DEFER;
		am_phy->id = of_alias_get_id(pdev->dev.of_node, "phy");
		if (am_phy->id < 0) {
		dev_err(&pdev->dev, "Missing PHY id: %d\n", am_phy->id);
		return am_phy->id;
		}

		ret = usb_phy_gen_create_phy(dev, &am_phy->usb_phy_gen,
		USB_PHY_TYPE_USB2, 0, false, false);
		if (ret)
		return ret;

		ret = usb_add_phy_dev(&am_phy->usb_phy_gen.phy);
		if (ret)
		goto err_add;
		am_phy->usb_phy_gen.phy.init = am335x_init;
		am_phy->usb_phy_gen.phy.shutdown = am335x_shutdown;

		platform_set_drvdata(pdev, am_phy);
		return 0;

		err_add:
		usb_phy_gen_cleanup_phy(&am_phy->usb_phy_gen);
		return ret;
		}

		static int am335x_phy_remove(struct platform_device *pdev)
		{
		struct am335x_phy *am_phy = platform_get_drvdata(pdev);

		usb_remove_phy(&am_phy->usb_phy_gen.phy);
		return 0;
		}

		static const struct of_device_id am335x_phy_ids[] = {
		{ .compatible = "ti,am335x-usb-phy" },
		{ }
		};
		MODULE_DEVICE_TABLE(of, am335x_phy_ids);

		static struct platform_driver am335x_phy_driver = {
		.probe = am335x_phy_probe,
		.remove = am335x_phy_remove,
		.driver = {
		.name = "am335x-phy-driver",
		.owner = THIS_MODULE,
		.of_match_table = of_match_ptr(am335x_phy_ids),
		},
		};

		module_platform_driver(am335x_phy_driver);
		MODULE_LICENSE("GPL v2");