1 /* 2 * Copyright (C) 2014 Marvell Technology Group Ltd. 3 * 4 * Antoine Tenart <antoine.tenart@free-electrons.com> 5 * 6 * This file is licensed under the terms of the GNU General Public 7 * License version 2. This program is licensed "as is" without any 8 * warranty of any kind, whether express or implied. 9 */ 10 11 #include <linux/clk.h> 12 #include <linux/dma-mapping.h> 13 #include <linux/module.h> 14 #include <linux/of.h> 15 #include <linux/of_platform.h> 16 #include <linux/phy/phy.h> 17 #include <linux/platform_device.h> 18 #include <linux/usb/chipidea.h> 19 #include <linux/usb/hcd.h> 20 #include <linux/usb/ulpi.h> 21 22 #include "ci.h" 23 24 struct ci_hdrc_usb2_priv { 25 struct platform_device *ci_pdev; 26 struct clk *clk; 27 }; 28 29 static const struct ci_hdrc_platform_data ci_default_pdata = { 30 .capoffset = DEF_CAPOFFSET, 31 .flags = CI_HDRC_DISABLE_STREAMING, 32 }; 33 34 static struct ci_hdrc_platform_data ci_zynq_pdata = { 35 .capoffset = DEF_CAPOFFSET, 36 }; 37 38 static const struct of_device_id ci_hdrc_usb2_of_match[] = { 39 { .compatible = "chipidea,usb2"}, 40 { .compatible = "xlnx,zynq-usb-2.20a", .data = &ci_zynq_pdata}, 41 { } 42 }; 43 MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match); 44 45 static int ci_hdrc_usb2_probe(struct platform_device *pdev) 46 { 47 struct device *dev = &pdev->dev; 48 struct ci_hdrc_usb2_priv *priv; 49 struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev); 50 int ret; 51 const struct of_device_id *match; 52 53 if (!ci_pdata) { 54 ci_pdata = devm_kmalloc(dev, sizeof(*ci_pdata), GFP_KERNEL); 55 *ci_pdata = ci_default_pdata; /* struct copy */ 56 } 57 58 match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev); 59 if (match && match->data) { 60 /* struct copy */ 61 *ci_pdata = *(struct ci_hdrc_platform_data *)match->data; 62 } 63 64 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 65 if (!priv) 66 return -ENOMEM; 67 68 priv->clk = devm_clk_get(dev, NULL); 69 if (!IS_ERR(priv->clk)) { 70 ret = clk_prepare_enable(priv->clk); 71 if (ret) { 72 dev_err(dev, "failed to enable the clock: %d\n", ret); 73 return ret; 74 } 75 } 76 77 ci_pdata->name = dev_name(dev); 78 79 priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource, 80 pdev->num_resources, ci_pdata); 81 if (IS_ERR(priv->ci_pdev)) { 82 ret = PTR_ERR(priv->ci_pdev); 83 if (ret != -EPROBE_DEFER) 84 dev_err(dev, 85 "failed to register ci_hdrc platform device: %d\n", 86 ret); 87 goto clk_err; 88 } 89 90 platform_set_drvdata(pdev, priv); 91 92 pm_runtime_no_callbacks(dev); 93 pm_runtime_enable(dev); 94 95 return 0; 96 97 clk_err: 98 if (!IS_ERR(priv->clk)) 99 clk_disable_unprepare(priv->clk); 100 return ret; 101 } 102 103 static int ci_hdrc_usb2_remove(struct platform_device *pdev) 104 { 105 struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev); 106 107 pm_runtime_disable(&pdev->dev); 108 ci_hdrc_remove_device(priv->ci_pdev); 109 clk_disable_unprepare(priv->clk); 110 111 return 0; 112 } 113 114 static struct platform_driver ci_hdrc_usb2_driver = { 115 .probe = ci_hdrc_usb2_probe, 116 .remove = ci_hdrc_usb2_remove, 117 .driver = { 118 .name = "chipidea-usb2", 119 .of_match_table = of_match_ptr(ci_hdrc_usb2_of_match), 120 }, 121 }; 122 module_platform_driver(ci_hdrc_usb2_driver); 123 124 MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx"); 125 MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>"); 126 MODULE_LICENSE("GPL"); 127