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