cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ci_hdrc_usb2.c (3250B)

      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/of_platform.h>
     13#include <linux/phy/phy.h>
     14#include <linux/platform_device.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};
     34
     35static const struct ci_hdrc_platform_data ci_zevio_pdata = {
     36	.capoffset	= DEF_CAPOFFSET,
     37	.flags		= CI_HDRC_REGS_SHARED | CI_HDRC_FORCE_FULLSPEED,
     38};
     39
     40static const struct of_device_id ci_hdrc_usb2_of_match[] = {
     41	{ .compatible = "chipidea,usb2" },
     42	{ .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata },
     43	{ .compatible = "lsi,zevio-usb", .data = &ci_zevio_pdata },
     44	{ }
     45};
     46MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
     47
     48static int ci_hdrc_usb2_probe(struct platform_device *pdev)
     49{
     50	struct device *dev = &pdev->dev;
     51	struct ci_hdrc_usb2_priv *priv;
     52	struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
     53	int ret;
     54	const struct of_device_id *match;
     55
     56	if (!ci_pdata) {
     57		ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
     58		if (!ci_pdata)
     59			return -ENOMEM;
     60		*ci_pdata = ci_default_pdata;	/* struct copy */
     61	}
     62
     63	match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
     64	if (match && match->data) {
     65		/* struct copy */
     66		*ci_pdata = *(struct ci_hdrc_platform_data *)match->data;
     67	}
     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 int 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	return 0;
    117}
    118
    119static struct platform_driver ci_hdrc_usb2_driver = {
    120	.probe	= ci_hdrc_usb2_probe,
    121	.remove	= ci_hdrc_usb2_remove,
    122	.driver	= {
    123		.name		= "chipidea-usb2",
    124		.of_match_table	= of_match_ptr(ci_hdrc_usb2_of_match),
    125	},
    126};
    127module_platform_driver(ci_hdrc_usb2_driver);
    128
    129MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
    130MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
    131MODULE_LICENSE("GPL");