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 }; 34 35 static 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 40 static 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 }; 46 MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match); 47 48 static 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; 102 103 clk_err: 104 clk_disable_unprepare(priv->clk); 105 return ret; 106 } 107 108 static 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 } 118 119 static 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 }; 127 module_platform_driver(ci_hdrc_usb2_driver); 128 129 MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx"); 130 MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>"); 131 MODULE_LICENSE("GPL"); 132