1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (C) 2014 Marvell Technology Group Ltd.
  4 *
  5 * Antoine Tenart <antoine.tenart@free-electrons.com>
  6 */
  7
  8#include <linux/clk.h>
  9#include <linux/dma-mapping.h>
 10#include <linux/module.h>
 11#include <linux/of.h>
 12#include <linux/phy/phy.h>
 13#include <linux/platform_device.h>
 14#include <linux/property.h>
 15#include <linux/usb/chipidea.h>
 16#include <linux/usb/hcd.h>
 17#include <linux/usb/ulpi.h>
 18
 19#include "ci.h"
 20
 21struct ci_hdrc_usb2_priv {
 22	struct platform_device	*ci_pdev;
 23	struct clk		*clk;
 24};
 25
 26static const struct ci_hdrc_platform_data ci_default_pdata = {
 27	.capoffset	= DEF_CAPOFFSET,
 28	.flags		= CI_HDRC_DISABLE_STREAMING,
 29};
 30
 31static const struct ci_hdrc_platform_data ci_zynq_pdata = {
 32	.capoffset	= DEF_CAPOFFSET,
 33	.flags          = CI_HDRC_PHY_VBUS_CONTROL,
 34};
 35
 36static const struct ci_hdrc_platform_data ci_zevio_pdata = {
 37	.capoffset	= DEF_CAPOFFSET,
 38	.flags		= CI_HDRC_REGS_SHARED | CI_HDRC_FORCE_FULLSPEED,
 39};
 40
 41static const struct of_device_id ci_hdrc_usb2_of_match[] = {
 42	{ .compatible = "chipidea,usb2" },
 43	{ .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata },
 44	{ .compatible = "lsi,zevio-usb", .data = &ci_zevio_pdata },
 45	{ }
 46};
 47MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
 48
 49static int ci_hdrc_usb2_probe(struct platform_device *pdev)
 50{
 51	struct device *dev = &pdev->dev;
 52	struct ci_hdrc_usb2_priv *priv;
 53	struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
 54	const struct ci_hdrc_platform_data *data;
 55	int ret;
 56
 57	if (!ci_pdata) {
 58		ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
 59		if (!ci_pdata)
 60			return -ENOMEM;
 61		*ci_pdata = ci_default_pdata;	/* struct copy */
 62	}
 63
 64	data = device_get_match_data(&pdev->dev);
 65	if (data)
 66		/* struct copy */
 67		*ci_pdata = *data;
 68
 69	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 70	if (!priv)
 71		return -ENOMEM;
 72
 73	priv->clk = devm_clk_get_optional(dev, NULL);
 74	if (IS_ERR(priv->clk))
 75		return PTR_ERR(priv->clk);
 76
 77	ret = clk_prepare_enable(priv->clk);
 78	if (ret) {
 79		dev_err(dev, "failed to enable the clock: %d\n", ret);
 80		return ret;
 81	}
 82
 83	ci_pdata->name = dev_name(dev);
 84
 85	priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
 86					   pdev->num_resources, ci_pdata);
 87	if (IS_ERR(priv->ci_pdev)) {
 88		ret = PTR_ERR(priv->ci_pdev);
 89		if (ret != -EPROBE_DEFER)
 90			dev_err(dev,
 91				"failed to register ci_hdrc platform device: %d\n",
 92				ret);
 93		goto clk_err;
 94	}
 95
 96	platform_set_drvdata(pdev, priv);
 97
 98	pm_runtime_no_callbacks(dev);
 99	pm_runtime_enable(dev);
100
101	return 0;
102
103clk_err:
104	clk_disable_unprepare(priv->clk);
105	return ret;
106}
107
108static void ci_hdrc_usb2_remove(struct platform_device *pdev)
109{
110	struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
111
112	pm_runtime_disable(&pdev->dev);
113	ci_hdrc_remove_device(priv->ci_pdev);
114	clk_disable_unprepare(priv->clk);
115}
116
117static struct platform_driver ci_hdrc_usb2_driver = {
118	.probe	= ci_hdrc_usb2_probe,
119	.remove_new = ci_hdrc_usb2_remove,
120	.driver	= {
121		.name		= "chipidea-usb2",
122		.of_match_table	= ci_hdrc_usb2_of_match,
123	},
124};
125module_platform_driver(ci_hdrc_usb2_driver);
126
127MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
128MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
129MODULE_LICENSE("GPL");