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>
27 struct platform_device *dwc3;
28 struct platform_device *usb2_phy;
29 struct platform_device *usb3_phy;
35 static int dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
37 struct nop_usb_xceiv_platform_data pdata;
38 struct platform_device *pdev;
41 memset(&pdata, 0x00, sizeof(pdata));
43 pdev = platform_device_alloc("nop_usb_xceiv", PLATFORM_DEVID_AUTO);
47 exynos->usb2_phy = pdev;
48 pdata.type = USB_PHY_TYPE_USB2;
50 ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata));
54 pdev = platform_device_alloc("nop_usb_xceiv", PLATFORM_DEVID_AUTO);
60 exynos->usb3_phy = pdev;
61 pdata.type = USB_PHY_TYPE_USB3;
63 ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata));
67 ret = platform_device_add(exynos->usb2_phy);
71 ret = platform_device_add(exynos->usb3_phy);
78 platform_device_del(exynos->usb2_phy);
81 platform_device_put(exynos->usb3_phy);
84 platform_device_put(exynos->usb2_phy);
89 static u64 dwc3_exynos_dma_mask = DMA_BIT_MASK(32);
91 static int dwc3_exynos_probe(struct platform_device *pdev)
93 struct platform_device *dwc3;
94 struct dwc3_exynos *exynos;
96 struct device *dev = &pdev->dev;
100 exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL);
102 dev_err(dev, "not enough memory\n");
107 * Right now device-tree probed devices don't get dma_mask set.
108 * Since shared usb code relies on it, set it here for now.
109 * Once we move to full device tree support this will vanish off.
111 if (!pdev->dev.dma_mask)
112 pdev->dev.dma_mask = &dwc3_exynos_dma_mask;
114 platform_set_drvdata(pdev, exynos);
116 ret = dwc3_exynos_register_phys(exynos);
118 dev_err(dev, "couldn't register PHYs\n");
122 dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
124 dev_err(dev, "couldn't allocate dwc3 device\n");
128 clk = devm_clk_get(dev, "usbdrd30");
130 dev_err(dev, "couldn't get clock\n");
135 dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
137 dwc3->dev.parent = dev;
138 dwc3->dev.dma_mask = dev->dma_mask;
139 dwc3->dev.dma_parms = dev->dma_parms;
144 clk_enable(exynos->clk);
146 ret = platform_device_add_resources(dwc3, pdev->resource,
147 pdev->num_resources);
149 dev_err(dev, "couldn't add resources to dwc3 device\n");
153 ret = platform_device_add(dwc3);
155 dev_err(dev, "failed to register dwc3 device\n");
164 platform_device_put(dwc3);
169 static int dwc3_exynos_remove(struct platform_device *pdev)
171 struct dwc3_exynos *exynos = platform_get_drvdata(pdev);
173 platform_device_unregister(exynos->dwc3);
174 platform_device_unregister(exynos->usb2_phy);
175 platform_device_unregister(exynos->usb3_phy);
177 clk_disable(exynos->clk);
183 static const struct of_device_id exynos_dwc3_match[] = {
184 { .compatible = "samsung,exynos5250-dwusb3" },
187 MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
190 static struct platform_driver dwc3_exynos_driver = {
191 .probe = dwc3_exynos_probe,
192 .remove = dwc3_exynos_remove,
194 .name = "exynos-dwc3",
195 .of_match_table = of_match_ptr(exynos_dwc3_match),
199 module_platform_driver(dwc3_exynos_driver);
201 MODULE_ALIAS("platform:exynos-dwc3");
202 MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
203 MODULE_LICENSE("GPL");
204 MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");