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 21 struct ci_hdrc_usb2_priv { 22 struct platform_device *ci_pdev; 23 struct clk *clk; 24 }; 25 26 static const struct ci_hdrc_platform_data ci_default_pdata = { 27 .capoffset = DEF_CAPOFFSET, 28 .flags = CI_HDRC_DISABLE_STREAMING, 29 }; 30 31 static const struct ci_hdrc_platform_data ci_zynq_pdata = { 32 .capoffset = DEF_CAPOFFSET, 33 .flags = CI_HDRC_PHY_VBUS_CONTROL, 34 }; 35 36 static 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 41 static 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 }; 47 MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match); 48 49 static 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 int ret; 55 const struct of_device_id *match; 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 match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev); 65 if (match && match->data) { 66 /* struct copy */ 67 *ci_pdata = *(struct ci_hdrc_platform_data *)match->data; 68 } 69 70 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 71 if (!priv) 72 return -ENOMEM; 73 74 priv->clk = devm_clk_get_optional(dev, NULL); 75 if (IS_ERR(priv->clk)) 76 return PTR_ERR(priv->clk); 77 78 ret = clk_prepare_enable(priv->clk); 79 if (ret) { 80 dev_err(dev, "failed to enable the clock: %d\n", ret); 81 return ret; 82 } 83 84 ci_pdata->name = dev_name(dev); 85 86 priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource, 87 pdev->num_resources, ci_pdata); 88 if (IS_ERR(priv->ci_pdev)) { 89 ret = PTR_ERR(priv->ci_pdev); 90 if (ret != -EPROBE_DEFER) 91 dev_err(dev, 92 "failed to register ci_hdrc platform device: %d\n", 93 ret); 94 goto clk_err; 95 } 96 97 platform_set_drvdata(pdev, priv); 98 99 pm_runtime_no_callbacks(dev); 100 pm_runtime_enable(dev); 101 102 return 0; 103 104 clk_err: 105 clk_disable_unprepare(priv->clk); 106 return ret; 107 } 108 109 static int ci_hdrc_usb2_remove(struct platform_device *pdev) 110 { 111 struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev); 112 113 pm_runtime_disable(&pdev->dev); 114 ci_hdrc_remove_device(priv->ci_pdev); 115 clk_disable_unprepare(priv->clk); 116 117 return 0; 118 } 119 120 static struct platform_driver ci_hdrc_usb2_driver = { 121 .probe = ci_hdrc_usb2_probe, 122 .remove = ci_hdrc_usb2_remove, 123 .driver = { 124 .name = "chipidea-usb2", 125 .of_match_table = of_match_ptr(ci_hdrc_usb2_of_match), 126 }, 127 }; 128 module_platform_driver(ci_hdrc_usb2_driver); 129 130 MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx"); 131 MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>"); 132 MODULE_LICENSE("GPL"); 133