Commit | Line | Data |
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d28a9689 AT |
1 | /** |
2 | * dwc3-exynos.c - Samsung EXYNOS DWC3 Specific Glue layer | |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com | |
6 | * | |
7 | * Author: Anton Tikhomirov <av.tikhomirov@samsung.com> | |
8 | * | |
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. | |
13 | */ | |
14 | ||
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> | |
d28a9689 | 21 | #include <linux/clk.h> |
d720f057 FB |
22 | #include <linux/usb/otg.h> |
23 | #include <linux/usb/nop-usb-xceiv.h> | |
accefdd4 | 24 | #include <linux/of.h> |
d28a9689 | 25 | |
d28a9689 AT |
26 | struct dwc3_exynos { |
27 | struct platform_device *dwc3; | |
d720f057 FB |
28 | struct platform_device *usb2_phy; |
29 | struct platform_device *usb3_phy; | |
d28a9689 AT |
30 | struct device *dev; |
31 | ||
32 | struct clk *clk; | |
33 | }; | |
34 | ||
41ac7b3a | 35 | static int dwc3_exynos_register_phys(struct dwc3_exynos *exynos) |
d720f057 FB |
36 | { |
37 | struct nop_usb_xceiv_platform_data pdata; | |
38 | struct platform_device *pdev; | |
39 | int ret; | |
40 | ||
41 | memset(&pdata, 0x00, sizeof(pdata)); | |
42 | ||
b0e45ddb | 43 | pdev = platform_device_alloc("nop_usb_xceiv", PLATFORM_DEVID_AUTO); |
d720f057 FB |
44 | if (!pdev) |
45 | return -ENOMEM; | |
46 | ||
47 | exynos->usb2_phy = pdev; | |
48 | pdata.type = USB_PHY_TYPE_USB2; | |
49 | ||
50 | ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata)); | |
51 | if (ret) | |
52 | goto err1; | |
53 | ||
b0e45ddb | 54 | pdev = platform_device_alloc("nop_usb_xceiv", PLATFORM_DEVID_AUTO); |
d720f057 FB |
55 | if (!pdev) { |
56 | ret = -ENOMEM; | |
57 | goto err1; | |
58 | } | |
59 | ||
60 | exynos->usb3_phy = pdev; | |
61 | pdata.type = USB_PHY_TYPE_USB3; | |
62 | ||
63 | ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata)); | |
64 | if (ret) | |
65 | goto err2; | |
66 | ||
67 | ret = platform_device_add(exynos->usb2_phy); | |
68 | if (ret) | |
69 | goto err2; | |
70 | ||
71 | ret = platform_device_add(exynos->usb3_phy); | |
72 | if (ret) | |
73 | goto err3; | |
74 | ||
75 | return 0; | |
76 | ||
77 | err3: | |
78 | platform_device_del(exynos->usb2_phy); | |
79 | ||
80 | err2: | |
81 | platform_device_put(exynos->usb3_phy); | |
82 | ||
83 | err1: | |
84 | platform_device_put(exynos->usb2_phy); | |
85 | ||
86 | return ret; | |
87 | } | |
88 | ||
accefdd4 VG |
89 | static u64 dwc3_exynos_dma_mask = DMA_BIT_MASK(32); |
90 | ||
41ac7b3a | 91 | static int dwc3_exynos_probe(struct platform_device *pdev) |
d28a9689 | 92 | { |
d28a9689 AT |
93 | struct platform_device *dwc3; |
94 | struct dwc3_exynos *exynos; | |
95 | struct clk *clk; | |
20b97dc1 | 96 | struct device *dev = &pdev->dev; |
d28a9689 | 97 | |
d28a9689 AT |
98 | int ret = -ENOMEM; |
99 | ||
20b97dc1 | 100 | exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL); |
d28a9689 | 101 | if (!exynos) { |
20b97dc1 JH |
102 | dev_err(dev, "not enough memory\n"); |
103 | return -ENOMEM; | |
d28a9689 AT |
104 | } |
105 | ||
accefdd4 VG |
106 | /* |
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. | |
110 | */ | |
111 | if (!pdev->dev.dma_mask) | |
112 | pdev->dev.dma_mask = &dwc3_exynos_dma_mask; | |
113 | ||
d28a9689 AT |
114 | platform_set_drvdata(pdev, exynos); |
115 | ||
d720f057 FB |
116 | ret = dwc3_exynos_register_phys(exynos); |
117 | if (ret) { | |
20b97dc1 JH |
118 | dev_err(dev, "couldn't register PHYs\n"); |
119 | return ret; | |
d720f057 FB |
120 | } |
121 | ||
124dafde | 122 | dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); |
d28a9689 | 123 | if (!dwc3) { |
20b97dc1 JH |
124 | dev_err(dev, "couldn't allocate dwc3 device\n"); |
125 | return -ENOMEM; | |
d28a9689 AT |
126 | } |
127 | ||
20b97dc1 | 128 | clk = devm_clk_get(dev, "usbdrd30"); |
d28a9689 | 129 | if (IS_ERR(clk)) { |
20b97dc1 | 130 | dev_err(dev, "couldn't get clock\n"); |
d28a9689 | 131 | ret = -EINVAL; |
20b97dc1 | 132 | goto err1; |
d28a9689 AT |
133 | } |
134 | ||
20b97dc1 | 135 | dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask); |
d28a9689 | 136 | |
20b97dc1 JH |
137 | dwc3->dev.parent = dev; |
138 | dwc3->dev.dma_mask = dev->dma_mask; | |
139 | dwc3->dev.dma_parms = dev->dma_parms; | |
d28a9689 | 140 | exynos->dwc3 = dwc3; |
20b97dc1 | 141 | exynos->dev = dev; |
d28a9689 AT |
142 | exynos->clk = clk; |
143 | ||
144 | clk_enable(exynos->clk); | |
145 | ||
d28a9689 AT |
146 | ret = platform_device_add_resources(dwc3, pdev->resource, |
147 | pdev->num_resources); | |
148 | if (ret) { | |
20b97dc1 JH |
149 | dev_err(dev, "couldn't add resources to dwc3 device\n"); |
150 | goto err2; | |
d28a9689 AT |
151 | } |
152 | ||
153 | ret = platform_device_add(dwc3); | |
154 | if (ret) { | |
20b97dc1 JH |
155 | dev_err(dev, "failed to register dwc3 device\n"); |
156 | goto err2; | |
d28a9689 AT |
157 | } |
158 | ||
159 | return 0; | |
160 | ||
20b97dc1 | 161 | err2: |
d28a9689 | 162 | clk_disable(clk); |
d28a9689 | 163 | err1: |
20b97dc1 JH |
164 | platform_device_put(dwc3); |
165 | ||
d28a9689 AT |
166 | return ret; |
167 | } | |
168 | ||
fb4e98ab | 169 | static int dwc3_exynos_remove(struct platform_device *pdev) |
d28a9689 AT |
170 | { |
171 | struct dwc3_exynos *exynos = platform_get_drvdata(pdev); | |
d28a9689 AT |
172 | |
173 | platform_device_unregister(exynos->dwc3); | |
d720f057 FB |
174 | platform_device_unregister(exynos->usb2_phy); |
175 | platform_device_unregister(exynos->usb3_phy); | |
d28a9689 | 176 | |
d28a9689 | 177 | clk_disable(exynos->clk); |
d28a9689 AT |
178 | |
179 | return 0; | |
180 | } | |
181 | ||
accefdd4 VG |
182 | #ifdef CONFIG_OF |
183 | static const struct of_device_id exynos_dwc3_match[] = { | |
fe29db8f | 184 | { .compatible = "samsung,exynos5250-dwusb3" }, |
accefdd4 VG |
185 | {}, |
186 | }; | |
187 | MODULE_DEVICE_TABLE(of, exynos_dwc3_match); | |
188 | #endif | |
189 | ||
d28a9689 AT |
190 | static struct platform_driver dwc3_exynos_driver = { |
191 | .probe = dwc3_exynos_probe, | |
7690417d | 192 | .remove = dwc3_exynos_remove, |
d28a9689 AT |
193 | .driver = { |
194 | .name = "exynos-dwc3", | |
accefdd4 | 195 | .of_match_table = of_match_ptr(exynos_dwc3_match), |
d28a9689 AT |
196 | }, |
197 | }; | |
198 | ||
199 | module_platform_driver(dwc3_exynos_driver); | |
200 | ||
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"); |