LXR linux/drivers/usb/chipidea/ci_hdrc

   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 struct ci_hdrc_platform_data ci_zynq_pdata = {
  32        .capoffset      = DEF_CAPOFFSET,
  33};
  34
  35static const struct of_device_id ci_hdrc_usb2_of_match[] = {
  36        { .compatible = "chipidea,usb2"},
  37        { .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata},
  38        { }
  39};
  40MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
  41
  42static int ci_hdrc_usb2_probe(struct platform_device *pdev)
  43{
  44        struct device *dev = &pdev->dev;
  45        struct ci_hdrc_usb2_priv *priv;
  46        struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
  47        int ret;
  48        const struct of_device_id *match;
  49
  50        if (!ci_pdata) {
  51                ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
  52                if (!ci_pdata)
  53                        return -ENOMEM;
  54                *ci_pdata = ci_default_pdata;   /* struct copy */
  55        }
  56
  57        match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
  58        if (match && match->data) {
  59                /* struct copy */
  60                *ci_pdata = *(struct ci_hdrc_platform_data *)match->data;
  61        }
  62
  63        priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
  64        if (!priv)
  65                return -ENOMEM;
  66
  67        priv->clk = devm_clk_get(dev, NULL);
  68        if (!IS_ERR(priv->clk)) {
  69                ret = clk_prepare_enable(priv->clk);
  70                if (ret) {
  71                        dev_err(dev, "failed to enable the clock: %d\n", ret);
  72                        return ret;
  73                }
  74        }
  75
  76        ci_pdata->name = dev_name(dev);
  77
  78        priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
  79                                           pdev->num_resources, ci_pdata);
  80        if (IS_ERR(priv->ci_pdev)) {
  81                ret = PTR_ERR(priv->ci_pdev);
  82                if (ret != -EPROBE_DEFER)
  83                        dev_err(dev,
  84                                "failed to register ci_hdrc platform device: %d\n",
  85                                ret);
  86                goto clk_err;
  87        }
  88
  89        platform_set_drvdata(pdev, priv);
  90
  91        pm_runtime_no_callbacks(dev);
  92        pm_runtime_enable(dev);
  93
  94        return 0;
  95
  96clk_err:
  97        if (!IS_ERR(priv->clk))
  98                clk_disable_unprepare(priv->clk);
  99        return ret;
 100}
 101
 102static int ci_hdrc_usb2_remove(struct platform_device *pdev)
 103{
 104        struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
 105
 106        pm_runtime_disable(&pdev->dev);
 107        ci_hdrc_remove_device(priv->ci_pdev);
 108        clk_disable_unprepare(priv->clk);
 109
 110        return 0;
 111}
 112
 113static struct platform_driver ci_hdrc_usb2_driver = {
 114        .probe  = ci_hdrc_usb2_probe,
 115        .remove = ci_hdrc_usb2_remove,
 116        .driver = {
 117                .name           = "chipidea-usb2",
 118                .of_match_table = of_match_ptr(ci_hdrc_usb2_of_match),
 119        },
 120};
 121module_platform_driver(ci_hdrc_usb2_driver);
 122
 123MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
 124MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
 125MODULE_LICENSE("GPL");
 126