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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> | |
d28a9689 AT |
24 | |
25 | #include "core.h" | |
26 | ||
27 | struct dwc3_exynos { | |
28 | struct platform_device *dwc3; | |
d720f057 FB |
29 | struct platform_device *usb2_phy; |
30 | struct platform_device *usb3_phy; | |
d28a9689 AT |
31 | struct device *dev; |
32 | ||
33 | struct clk *clk; | |
34 | }; | |
35 | ||
d720f057 FB |
36 | static int __devinit dwc3_exynos_register_phys(struct dwc3_exynos *exynos) |
37 | { | |
38 | struct nop_usb_xceiv_platform_data pdata; | |
39 | struct platform_device *pdev; | |
40 | int ret; | |
41 | ||
42 | memset(&pdata, 0x00, sizeof(pdata)); | |
43 | ||
44 | pdev = platform_device_alloc("nop_usb_xceiv", 0); | |
45 | if (!pdev) | |
46 | return -ENOMEM; | |
47 | ||
48 | exynos->usb2_phy = pdev; | |
49 | pdata.type = USB_PHY_TYPE_USB2; | |
50 | ||
51 | ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata)); | |
52 | if (ret) | |
53 | goto err1; | |
54 | ||
55 | pdev = platform_device_alloc("nop_usb_xceiv", 1); | |
56 | if (!pdev) { | |
57 | ret = -ENOMEM; | |
58 | goto err1; | |
59 | } | |
60 | ||
61 | exynos->usb3_phy = pdev; | |
62 | pdata.type = USB_PHY_TYPE_USB3; | |
63 | ||
64 | ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata)); | |
65 | if (ret) | |
66 | goto err2; | |
67 | ||
68 | ret = platform_device_add(exynos->usb2_phy); | |
69 | if (ret) | |
70 | goto err2; | |
71 | ||
72 | ret = platform_device_add(exynos->usb3_phy); | |
73 | if (ret) | |
74 | goto err3; | |
75 | ||
76 | return 0; | |
77 | ||
78 | err3: | |
79 | platform_device_del(exynos->usb2_phy); | |
80 | ||
81 | err2: | |
82 | platform_device_put(exynos->usb3_phy); | |
83 | ||
84 | err1: | |
85 | platform_device_put(exynos->usb2_phy); | |
86 | ||
87 | return ret; | |
88 | } | |
89 | ||
d28a9689 AT |
90 | static int __devinit dwc3_exynos_probe(struct platform_device *pdev) |
91 | { | |
92 | struct dwc3_exynos_data *pdata = pdev->dev.platform_data; | |
93 | struct platform_device *dwc3; | |
94 | struct dwc3_exynos *exynos; | |
95 | struct clk *clk; | |
96 | ||
d28a9689 AT |
97 | int ret = -ENOMEM; |
98 | ||
99 | exynos = kzalloc(sizeof(*exynos), GFP_KERNEL); | |
100 | if (!exynos) { | |
101 | dev_err(&pdev->dev, "not enough memory\n"); | |
102 | goto err0; | |
103 | } | |
104 | ||
105 | platform_set_drvdata(pdev, exynos); | |
106 | ||
d720f057 FB |
107 | ret = dwc3_exynos_register_phys(exynos); |
108 | if (ret) { | |
109 | dev_err(&pdev->dev, "couldn't register PHYs\n"); | |
110 | goto err1; | |
111 | } | |
112 | ||
124dafde | 113 | dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); |
d28a9689 AT |
114 | if (!dwc3) { |
115 | dev_err(&pdev->dev, "couldn't allocate dwc3 device\n"); | |
124dafde | 116 | goto err1; |
d28a9689 AT |
117 | } |
118 | ||
119 | clk = clk_get(&pdev->dev, "usbdrd30"); | |
120 | if (IS_ERR(clk)) { | |
121 | dev_err(&pdev->dev, "couldn't get clock\n"); | |
122 | ret = -EINVAL; | |
123 | goto err3; | |
124 | } | |
125 | ||
126 | dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask); | |
127 | ||
128 | dwc3->dev.parent = &pdev->dev; | |
129 | dwc3->dev.dma_mask = pdev->dev.dma_mask; | |
130 | dwc3->dev.dma_parms = pdev->dev.dma_parms; | |
131 | exynos->dwc3 = dwc3; | |
132 | exynos->dev = &pdev->dev; | |
133 | exynos->clk = clk; | |
134 | ||
135 | clk_enable(exynos->clk); | |
136 | ||
137 | /* PHY initialization */ | |
138 | if (!pdata) { | |
139 | dev_dbg(&pdev->dev, "missing platform data\n"); | |
140 | } else { | |
141 | if (pdata->phy_init) | |
142 | pdata->phy_init(pdev, pdata->phy_type); | |
143 | } | |
144 | ||
145 | ret = platform_device_add_resources(dwc3, pdev->resource, | |
146 | pdev->num_resources); | |
147 | if (ret) { | |
148 | dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n"); | |
149 | goto err4; | |
150 | } | |
151 | ||
152 | ret = platform_device_add(dwc3); | |
153 | if (ret) { | |
154 | dev_err(&pdev->dev, "failed to register dwc3 device\n"); | |
155 | goto err4; | |
156 | } | |
157 | ||
158 | return 0; | |
159 | ||
160 | err4: | |
161 | if (pdata && pdata->phy_exit) | |
162 | pdata->phy_exit(pdev, pdata->phy_type); | |
163 | ||
164 | clk_disable(clk); | |
165 | clk_put(clk); | |
166 | err3: | |
167 | platform_device_put(dwc3); | |
d28a9689 AT |
168 | err1: |
169 | kfree(exynos); | |
170 | err0: | |
171 | return ret; | |
172 | } | |
173 | ||
174 | static int __devexit dwc3_exynos_remove(struct platform_device *pdev) | |
175 | { | |
176 | struct dwc3_exynos *exynos = platform_get_drvdata(pdev); | |
177 | struct dwc3_exynos_data *pdata = pdev->dev.platform_data; | |
178 | ||
179 | platform_device_unregister(exynos->dwc3); | |
d720f057 FB |
180 | platform_device_unregister(exynos->usb2_phy); |
181 | platform_device_unregister(exynos->usb3_phy); | |
d28a9689 | 182 | |
d28a9689 AT |
183 | if (pdata && pdata->phy_exit) |
184 | pdata->phy_exit(pdev, pdata->phy_type); | |
185 | ||
186 | clk_disable(exynos->clk); | |
187 | clk_put(exynos->clk); | |
188 | ||
189 | kfree(exynos); | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
194 | static struct platform_driver dwc3_exynos_driver = { | |
195 | .probe = dwc3_exynos_probe, | |
196 | .remove = __devexit_p(dwc3_exynos_remove), | |
197 | .driver = { | |
198 | .name = "exynos-dwc3", | |
199 | }, | |
200 | }; | |
201 | ||
202 | module_platform_driver(dwc3_exynos_driver); | |
203 | ||
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"); |