2 * dwc3-exynos.c - Samsung EXYNOS DWC3 Specific Glue layer
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com
7 * Author: Anton Tikhomirov <av.tikhomirov@samsung.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/platform_device.h>
19 #include <linux/platform_data/dwc3-exynos.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/clk.h>
22 #include <linux/usb/otg.h>
23 #include <linux/usb/nop-usb-xceiv.h>
28 struct platform_device *dwc3;
29 struct platform_device *usb2_phy;
30 struct platform_device *usb3_phy;
36 static int __devinit dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
38 struct nop_usb_xceiv_platform_data pdata;
39 struct platform_device *pdev;
42 memset(&pdata, 0x00, sizeof(pdata));
44 pdev = platform_device_alloc("nop_usb_xceiv", 0);
48 exynos->usb2_phy = pdev;
49 pdata.type = USB_PHY_TYPE_USB2;
51 ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata));
55 pdev = platform_device_alloc("nop_usb_xceiv", 1);
61 exynos->usb3_phy = pdev;
62 pdata.type = USB_PHY_TYPE_USB3;
64 ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata));
68 ret = platform_device_add(exynos->usb2_phy);
72 ret = platform_device_add(exynos->usb3_phy);
79 platform_device_del(exynos->usb2_phy);
82 platform_device_put(exynos->usb3_phy);
85 platform_device_put(exynos->usb2_phy);
90 static int __devinit dwc3_exynos_probe(struct platform_device *pdev)
92 struct dwc3_exynos_data *pdata = pdev->dev.platform_data;
93 struct platform_device *dwc3;
94 struct dwc3_exynos *exynos;
99 exynos = kzalloc(sizeof(*exynos), GFP_KERNEL);
101 dev_err(&pdev->dev, "not enough memory\n");
105 platform_set_drvdata(pdev, exynos);
107 ret = dwc3_exynos_register_phys(exynos);
109 dev_err(&pdev->dev, "couldn't register PHYs\n");
113 dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
115 dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
119 clk = clk_get(&pdev->dev, "usbdrd30");
121 dev_err(&pdev->dev, "couldn't get clock\n");
126 dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask);
128 dwc3->dev.parent = &pdev->dev;
129 dwc3->dev.dma_mask = pdev->dev.dma_mask;
130 dwc3->dev.dma_parms = pdev->dev.dma_parms;
132 exynos->dev = &pdev->dev;
135 clk_enable(exynos->clk);
137 /* PHY initialization */
139 dev_dbg(&pdev->dev, "missing platform data\n");
142 pdata->phy_init(pdev, pdata->phy_type);
145 ret = platform_device_add_resources(dwc3, pdev->resource,
146 pdev->num_resources);
148 dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n");
152 ret = platform_device_add(dwc3);
154 dev_err(&pdev->dev, "failed to register dwc3 device\n");
161 if (pdata && pdata->phy_exit)
162 pdata->phy_exit(pdev, pdata->phy_type);
167 platform_device_put(dwc3);
174 static int __devexit dwc3_exynos_remove(struct platform_device *pdev)
176 struct dwc3_exynos *exynos = platform_get_drvdata(pdev);
177 struct dwc3_exynos_data *pdata = pdev->dev.platform_data;
179 platform_device_unregister(exynos->dwc3);
180 platform_device_unregister(exynos->usb2_phy);
181 platform_device_unregister(exynos->usb3_phy);
183 if (pdata && pdata->phy_exit)
184 pdata->phy_exit(pdev, pdata->phy_type);
186 clk_disable(exynos->clk);
187 clk_put(exynos->clk);
194 static struct platform_driver dwc3_exynos_driver = {
195 .probe = dwc3_exynos_probe,
196 .remove = __devexit_p(dwc3_exynos_remove),
198 .name = "exynos-dwc3",
202 module_platform_driver(dwc3_exynos_driver);
204 MODULE_ALIAS("platform:exynos-dwc3");
205 MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
206 MODULE_LICENSE("GPL");
207 MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");