usb: chipidea: Add support for Tegra20/30/114/124

obj-$(CONFIG_USB_CHIPIDEA_PCI)	+= ci_hdrc_pci.o

obj-$(CONFIG_USB_CHIPIDEA_OF)	+= usbmisc_imx.o ci_hdrc_imx.o

obj-$(CONFIG_USB_CHIPIDEA_OF)	+= ci_hdrc_tegra.o

/*

 * Copyright (c) 2016, NVIDIA Corporation

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 */

#include <linux/clk.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/reset.h>

#include <linux/usb/chipidea.h>

#include "ci.h"

struct tegra_udc {

	struct ci_hdrc_platform_data data;

	struct platform_device *dev;

	struct usb_phy *phy;

	struct clk *clk;

};

struct tegra_udc_soc_info {

	unsigned long flags;

};

static const struct tegra_udc_soc_info tegra20_udc_soc_info = {

	.flags = CI_HDRC_REQUIRES_ALIGNED_DMA,

};

static const struct tegra_udc_soc_info tegra30_udc_soc_info = {

	.flags = 0,

};

static const struct tegra_udc_soc_info tegra114_udc_soc_info = {

	.flags = 0,

};

static const struct tegra_udc_soc_info tegra124_udc_soc_info = {

	.flags = 0,

};

static const struct of_device_id tegra_udc_of_match[] = {

	{

		.compatible = "nvidia,tegra20-udc",

		.data = &tegra20_udc_soc_info,

	}, {

		.compatible = "nvidia,tegra30-udc",

		.data = &tegra30_udc_soc_info,

	}, {

		.compatible = "nvidia,tegra114-udc",

		.data = &tegra114_udc_soc_info,

	}, {

		.compatible = "nvidia,tegra124-udc",

		.data = &tegra124_udc_soc_info,

	}, {

		/* sentinel */

	}

};

MODULE_DEVICE_TABLE(of, tegra_udc_of_match);

static int tegra_udc_probe(struct platform_device *pdev)

{

	const struct tegra_udc_soc_info *soc;

	struct tegra_udc *udc;

	int err;

	udc = devm_kzalloc(&pdev->dev, sizeof(*udc), GFP_KERNEL);

	if (!udc)

		return -ENOMEM;

	soc = of_device_get_match_data(&pdev->dev);

	if (!soc) {

		dev_err(&pdev->dev, "failed to match OF data\n");

		return -EINVAL;

	}

	udc->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "nvidia,phy", 0);

	if (IS_ERR(udc->phy)) {

		err = PTR_ERR(udc->phy);

		dev_err(&pdev->dev, "failed to get PHY: %d\n", err);

		return err;

	}

	udc->clk = devm_clk_get(&pdev->dev, NULL);

	if (IS_ERR(udc->clk)) {

		err = PTR_ERR(udc->clk);

		dev_err(&pdev->dev, "failed to get clock: %d\n", err);

		return err;

	}

	err = clk_prepare_enable(udc->clk);

	if (err < 0) {

		dev_err(&pdev->dev, "failed to enable clock: %d\n", err);

		return err;

	}

	/*

	 * Tegra's USB PHY driver doesn't implement optional phy_init()

	 * hook, so we have to power on UDC controller before ChipIdea

	 * driver initialization kicks in.

	 */

	usb_phy_set_suspend(udc->phy, 0);

	/* setup and register ChipIdea HDRC device */

	udc->data.name = "tegra-udc";

	udc->data.flags = soc->flags;

	udc->data.usb_phy = udc->phy;

	udc->data.capoffset = DEF_CAPOFFSET;

	udc->dev = ci_hdrc_add_device(&pdev->dev, pdev->resource,

				      pdev->num_resources, &udc->data);

	if (IS_ERR(udc->dev)) {

		err = PTR_ERR(udc->dev);

		dev_err(&pdev->dev, "failed to add HDRC device: %d\n", err);

		goto fail_power_off;

	}

	platform_set_drvdata(pdev, udc);

	return 0;

fail_power_off:

	usb_phy_set_suspend(udc->phy, 1);

	clk_disable_unprepare(udc->clk);

	return err;

}

static int tegra_udc_remove(struct platform_device *pdev)

{

	struct tegra_udc *udc = platform_get_drvdata(pdev);

	usb_phy_set_suspend(udc->phy, 1);

	clk_disable_unprepare(udc->clk);

	return 0;

}

static struct platform_driver tegra_udc_driver = {

	.driver = {

		.name = "tegra-udc",

		.of_match_table = tegra_udc_of_match,

	},

	.probe = tegra_udc_probe,

	.remove = tegra_udc_remove,

};

module_platform_driver(tegra_udc_driver);

MODULE_DESCRIPTION("NVIDIA Tegra USB device mode driver");

MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");

MODULE_ALIAS("platform:tegra-udc");

MODULE_LICENSE("GPL v2");