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>
29 struct platform_device *dwc3;
30 struct platform_device *usb2_phy;
31 struct platform_device *usb3_phy;
37 static int __devinit dwc3_exynos_register_phys(struct dwc3_exynos *exynos)
39 struct nop_usb_xceiv_platform_data pdata;
40 struct platform_device *pdev;
43 memset(&pdata, 0x00, sizeof(pdata));
45 pdev = platform_device_alloc("nop_usb_xceiv", 0);
49 exynos->usb2_phy = pdev;
50 pdata.type = USB_PHY_TYPE_USB2;
52 ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata));
56 pdev = platform_device_alloc("nop_usb_xceiv", 1);
62 exynos->usb3_phy = pdev;
63 pdata.type = USB_PHY_TYPE_USB3;
65 ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata));
69 ret = platform_device_add(exynos->usb2_phy);
73 ret = platform_device_add(exynos->usb3_phy);
80 platform_device_del(exynos->usb2_phy);
83 platform_device_put(exynos->usb3_phy);
86 platform_device_put(exynos->usb2_phy);
91 static u64 dwc3_exynos_dma_mask = DMA_BIT_MASK(32);
93 static int __devinit dwc3_exynos_probe(struct platform_device *pdev)
95 struct platform_device *dwc3;
96 struct dwc3_exynos *exynos;
101 exynos = kzalloc(sizeof(*exynos), GFP_KERNEL);
103 dev_err(&pdev->dev, "not enough memory\n");
108 * Right now device-tree probed devices don't get dma_mask set.
109 * Since shared usb code relies on it, set it here for now.
110 * Once we move to full device tree support this will vanish off.
112 if (!pdev->dev.dma_mask)
113 pdev->dev.dma_mask = &dwc3_exynos_dma_mask;
115 platform_set_drvdata(pdev, exynos);
117 ret = dwc3_exynos_register_phys(exynos);
119 dev_err(&pdev->dev, "couldn't register PHYs\n");
123 dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
125 dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
129 clk = clk_get(&pdev->dev, "usbdrd30");
131 dev_err(&pdev->dev, "couldn't get clock\n");
136 dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask);
138 dwc3->dev.parent = &pdev->dev;
139 dwc3->dev.dma_mask = pdev->dev.dma_mask;
140 dwc3->dev.dma_parms = pdev->dev.dma_parms;
142 exynos->dev = &pdev->dev;
145 clk_enable(exynos->clk);
147 ret = platform_device_add_resources(dwc3, pdev->resource,
148 pdev->num_resources);
150 dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n");
154 ret = platform_device_add(dwc3);
156 dev_err(&pdev->dev, "failed to register dwc3 device\n");
166 platform_device_put(dwc3);
173 static int __devexit dwc3_exynos_remove(struct platform_device *pdev)
175 struct dwc3_exynos *exynos = platform_get_drvdata(pdev);
177 platform_device_unregister(exynos->dwc3);
178 platform_device_unregister(exynos->usb2_phy);
179 platform_device_unregister(exynos->usb3_phy);
181 clk_disable(exynos->clk);
182 clk_put(exynos->clk);
190 static const struct of_device_id exynos_dwc3_match[] = {
191 { .compatible = "samsung,exynos-dwc3" },
194 MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
197 static struct platform_driver dwc3_exynos_driver = {
198 .probe = dwc3_exynos_probe,
199 .remove = __devexit_p(dwc3_exynos_remove),
201 .name = "exynos-dwc3",
202 .of_match_table = of_match_ptr(exynos_dwc3_match),
206 module_platform_driver(dwc3_exynos_driver);
208 MODULE_ALIAS("platform:exynos-dwc3");
209 MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
210 MODULE_LICENSE("GPL");
211 MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer");