132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2014 Marvell Technology Group Ltd.
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*
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* Antoine Tenart <antoine.tenart@free-electrons.com>
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*/
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#include <linux/clk.h>
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#include <linux/dma-mapping.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/phy/phy.h>
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#include <linux/platform_device.h>
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#include <linux/usb/chipidea.h>
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#include <linux/usb/hcd.h>
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#include <linux/usb/ulpi.h>
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#include "ci.h"
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struct ci_hdrc_usb2_priv {
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struct platform_device *ci_pdev;
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struct clk *clk;
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};
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static const struct ci_hdrc_platform_data ci_default_pdata = {
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.capoffset = DEF_CAPOFFSET,
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.flags = CI_HDRC_DISABLE_STREAMING,
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};
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static const struct ci_hdrc_platform_data ci_zynq_pdata = {
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.capoffset = DEF_CAPOFFSET,
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};
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static const struct ci_hdrc_platform_data ci_zevio_pdata = {
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.capoffset = DEF_CAPOFFSET,
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.flags = CI_HDRC_REGS_SHARED | CI_HDRC_FORCE_FULLSPEED,
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};
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static const struct of_device_id ci_hdrc_usb2_of_match[] = {
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{ .compatible = "chipidea,usb2" },
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{ .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata },
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{ .compatible = "lsi,zevio-usb", .data = &ci_zevio_pdata },
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{ }
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};
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MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match);
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static int ci_hdrc_usb2_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct ci_hdrc_usb2_priv *priv;
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struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev);
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int ret;
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const struct of_device_id *match;
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if (!ci_pdata) {
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ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL);
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if (!ci_pdata)
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return -ENOMEM;
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*ci_pdata = ci_default_pdata; /* struct copy */
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}
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match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev);
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if (match && match->data) {
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/* struct copy */
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*ci_pdata = *(struct ci_hdrc_platform_data *)match->data;
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}
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->clk = devm_clk_get_optional(dev, NULL);
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if (IS_ERR(priv->clk))
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return PTR_ERR(priv->clk);
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ret = clk_prepare_enable(priv->clk);
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if (ret) {
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dev_err(dev, "failed to enable the clock: %d\n", ret);
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return ret;
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}
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ci_pdata->name = dev_name(dev);
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priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
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pdev->num_resources, ci_pdata);
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if (IS_ERR(priv->ci_pdev)) {
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ret = PTR_ERR(priv->ci_pdev);
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if (ret != -EPROBE_DEFER)
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dev_err(dev,
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"failed to register ci_hdrc platform device: %d\n",
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ret);
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goto clk_err;
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}
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platform_set_drvdata(pdev, priv);
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pm_runtime_no_callbacks(dev);
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pm_runtime_enable(dev);
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return 0;
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clk_err:
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clk_disable_unprepare(priv->clk);
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return ret;
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}
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static int ci_hdrc_usb2_remove(struct platform_device *pdev)
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{
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struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev);
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pm_runtime_disable(&pdev->dev);
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ci_hdrc_remove_device(priv->ci_pdev);
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clk_disable_unprepare(priv->clk);
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return 0;
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}
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static struct platform_driver ci_hdrc_usb2_driver = {
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.probe = ci_hdrc_usb2_probe,
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.remove = ci_hdrc_usb2_remove,
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.driver = {
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.name = "chipidea-usb2",
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.of_match_table = of_match_ptr(ci_hdrc_usb2_of_match),
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},
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};
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module_platform_driver(ci_hdrc_usb2_driver);
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MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx");
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MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
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MODULE_LICENSE("GPL");
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