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 if (!ci_pdata) 56 return -ENOMEM; 57 *ci_pdata = ci_default_pdata; /* struct copy */ 58 } 59 60 match = of_match_device(ci_hdrc_usb2_of_match, &pdev->dev); 61 if (match && match->data) { 62 /* struct copy */ 63 *ci_pdata = *(struct ci_hdrc_platform_data *)match->data; 64 } 65 66 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 67 if (!priv) 68 return -ENOMEM; 69 70 priv->clk = devm_clk_get(dev, NULL); 71 if (!IS_ERR(priv->clk)) { 72 ret = clk_prepare_enable(priv->clk); 73 if (ret) { 74 dev_err(dev, "failed to enable the clock: %d\n", ret); 75 return ret; 76 } 77 } 78 79 ci_pdata->name = dev_name(dev); 80 81 priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource, 82 pdev->num_resources, ci_pdata); 83 if (IS_ERR(priv->ci_pdev)) { 84 ret = PTR_ERR(priv->ci_pdev); 85 if (ret != -EPROBE_DEFER) 86 dev_err(dev, 87 "failed to register ci_hdrc platform device: %d\n", 88 ret); 89 goto clk_err; 90 } 91 92 platform_set_drvdata(pdev, priv); 93 94 pm_runtime_no_callbacks(dev); 95 pm_runtime_enable(dev); 96 97 return 0; 98 99 clk_err: 100 if (!IS_ERR(priv->clk)) 101 clk_disable_unprepare(priv->clk); 102 return ret; 103 } 104 105 static int ci_hdrc_usb2_remove(struct platform_device *pdev) 106 { 107 struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev); 108 109 pm_runtime_disable(&pdev->dev); 110 ci_hdrc_remove_device(priv->ci_pdev); 111 clk_disable_unprepare(priv->clk); 112 113 return 0; 114 } 115 116 static struct platform_driver ci_hdrc_usb2_driver = { 117 .probe = ci_hdrc_usb2_probe, 118 .remove = ci_hdrc_usb2_remove, 119 .driver = { 120 .name = "chipidea-usb2", 121 .of_match_table = of_match_ptr(ci_hdrc_usb2_of_match), 122 }, 123 }; 124 module_platform_driver(ci_hdrc_usb2_driver); 125 126 MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx"); 127 MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>"); 128 MODULE_LICENSE("GPL"); 129