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d142d6be RZ |
1 | /* |
2 | * Copyright 2012 Freescale Semiconductor, Inc. | |
3 | * | |
4 | * The code contained herein is licensed under the GNU General Public | |
5 | * License. You may obtain a copy of the GNU General Public License | |
6 | * Version 2 or later at the following locations: | |
7 | * | |
8 | * http://www.opensource.org/licenses/gpl-license.html | |
9 | * http://www.gnu.org/copyleft/gpl.html | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/of_platform.h> | |
14 | #include <linux/clk.h> | |
15 | #include <linux/err.h> | |
16 | #include <linux/io.h> | |
a0685330 | 17 | #include <linux/delay.h> |
d142d6be RZ |
18 | |
19 | #include "ci13xxx_imx.h" | |
20 | ||
21 | #define USB_DEV_MAX 4 | |
22 | ||
a0685330 MG |
23 | #define MX25_USB_PHY_CTRL_OFFSET 0x08 |
24 | #define MX25_BM_EXTERNAL_VBUS_DIVIDER BIT(23) | |
25 | ||
f0c910b6 MG |
26 | #define MX53_USB_OTG_PHY_CTRL_0_OFFSET 0x08 |
27 | #define MX53_USB_UH2_CTRL_OFFSET 0x14 | |
28 | #define MX53_USB_UH3_CTRL_OFFSET 0x18 | |
29 | #define MX53_BM_OVER_CUR_DIS_H1 BIT(5) | |
30 | #define MX53_BM_OVER_CUR_DIS_OTG BIT(8) | |
31 | #define MX53_BM_OVER_CUR_DIS_UHx BIT(30) | |
32 | ||
e609108a | 33 | #define MX6_BM_OVER_CUR_DIS BIT(7) |
d142d6be | 34 | |
a7bc2fdf | 35 | struct imx_usbmisc { |
d142d6be RZ |
36 | void __iomem *base; |
37 | spinlock_t lock; | |
38 | struct clk *clk; | |
39 | struct usbmisc_usb_device usbdev[USB_DEV_MAX]; | |
e609108a | 40 | const struct usbmisc_ops *ops; |
d142d6be RZ |
41 | }; |
42 | ||
a7bc2fdf | 43 | static struct imx_usbmisc *usbmisc; |
d142d6be RZ |
44 | |
45 | static struct usbmisc_usb_device *get_usbdev(struct device *dev) | |
46 | { | |
47 | int i, ret; | |
48 | ||
49 | for (i = 0; i < USB_DEV_MAX; i++) { | |
50 | if (usbmisc->usbdev[i].dev == dev) | |
51 | return &usbmisc->usbdev[i]; | |
52 | else if (!usbmisc->usbdev[i].dev) | |
53 | break; | |
54 | } | |
55 | ||
56 | if (i >= USB_DEV_MAX) | |
57 | return ERR_PTR(-EBUSY); | |
58 | ||
59 | ret = usbmisc_get_init_data(dev, &usbmisc->usbdev[i]); | |
60 | if (ret) | |
61 | return ERR_PTR(ret); | |
62 | ||
63 | return &usbmisc->usbdev[i]; | |
64 | } | |
65 | ||
a0685330 MG |
66 | static int usbmisc_imx25_post(struct device *dev) |
67 | { | |
68 | struct usbmisc_usb_device *usbdev; | |
69 | void __iomem *reg; | |
70 | unsigned long flags; | |
71 | u32 val; | |
72 | ||
73 | usbdev = get_usbdev(dev); | |
74 | if (IS_ERR(usbdev)) | |
75 | return PTR_ERR(usbdev); | |
76 | ||
77 | reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET; | |
78 | ||
79 | if (usbdev->evdo) { | |
80 | spin_lock_irqsave(&usbmisc->lock, flags); | |
81 | val = readl(reg); | |
82 | writel(val | MX25_BM_EXTERNAL_VBUS_DIVIDER, reg); | |
83 | spin_unlock_irqrestore(&usbmisc->lock, flags); | |
84 | usleep_range(5000, 10000); /* needed to stabilize voltage */ | |
85 | } | |
86 | ||
87 | return 0; | |
88 | } | |
89 | ||
f0c910b6 MG |
90 | static int usbmisc_imx53_init(struct device *dev) |
91 | { | |
92 | struct usbmisc_usb_device *usbdev; | |
93 | void __iomem *reg = NULL; | |
94 | unsigned long flags; | |
95 | u32 val = 0; | |
96 | ||
97 | usbdev = get_usbdev(dev); | |
98 | if (IS_ERR(usbdev)) | |
99 | return PTR_ERR(usbdev); | |
100 | ||
101 | if (usbdev->disable_oc) { | |
102 | spin_lock_irqsave(&usbmisc->lock, flags); | |
103 | switch (usbdev->index) { | |
104 | case 0: | |
105 | reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET; | |
106 | val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG; | |
107 | break; | |
108 | case 1: | |
109 | reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET; | |
110 | val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1; | |
111 | break; | |
112 | case 2: | |
113 | reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET; | |
114 | val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx; | |
115 | break; | |
116 | case 3: | |
117 | reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET; | |
118 | val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx; | |
119 | break; | |
120 | } | |
121 | if (reg && val) | |
122 | writel(val, reg); | |
123 | spin_unlock_irqrestore(&usbmisc->lock, flags); | |
124 | } | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
d142d6be RZ |
129 | static int usbmisc_imx6q_init(struct device *dev) |
130 | { | |
131 | ||
132 | struct usbmisc_usb_device *usbdev; | |
133 | unsigned long flags; | |
134 | u32 reg; | |
135 | ||
136 | usbdev = get_usbdev(dev); | |
137 | if (IS_ERR(usbdev)) | |
138 | return PTR_ERR(usbdev); | |
139 | ||
140 | if (usbdev->disable_oc) { | |
141 | spin_lock_irqsave(&usbmisc->lock, flags); | |
142 | reg = readl(usbmisc->base + usbdev->index * 4); | |
e609108a | 143 | writel(reg | MX6_BM_OVER_CUR_DIS, |
d142d6be RZ |
144 | usbmisc->base + usbdev->index * 4); |
145 | spin_unlock_irqrestore(&usbmisc->lock, flags); | |
146 | } | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
a0685330 MG |
151 | static const struct usbmisc_ops imx25_usbmisc_ops = { |
152 | .post = usbmisc_imx25_post, | |
153 | }; | |
154 | ||
f0c910b6 MG |
155 | static const struct usbmisc_ops imx53_usbmisc_ops = { |
156 | .init = usbmisc_imx53_init, | |
157 | }; | |
158 | ||
d142d6be RZ |
159 | static const struct usbmisc_ops imx6q_usbmisc_ops = { |
160 | .init = usbmisc_imx6q_init, | |
161 | }; | |
162 | ||
a7bc2fdf | 163 | static const struct of_device_id usbmisc_imx_dt_ids[] = { |
a0685330 MG |
164 | { |
165 | .compatible = "fsl,imx25-usbmisc", | |
166 | .data = &imx25_usbmisc_ops, | |
167 | }, | |
f0c910b6 MG |
168 | { |
169 | .compatible = "fsl,imx53-usbmisc", | |
170 | .data = &imx53_usbmisc_ops, | |
171 | }, | |
e609108a MKB |
172 | { |
173 | .compatible = "fsl,imx6q-usbmisc", | |
174 | .data = &imx6q_usbmisc_ops, | |
175 | }, | |
d142d6be RZ |
176 | { /* sentinel */ } |
177 | }; | |
178 | ||
a7bc2fdf | 179 | static int usbmisc_imx_probe(struct platform_device *pdev) |
d142d6be RZ |
180 | { |
181 | struct resource *res; | |
a7bc2fdf | 182 | struct imx_usbmisc *data; |
d142d6be | 183 | int ret; |
e609108a | 184 | struct of_device_id *tmp_dev; |
d142d6be RZ |
185 | |
186 | if (usbmisc) | |
187 | return -EBUSY; | |
188 | ||
189 | data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); | |
190 | if (!data) | |
191 | return -ENOMEM; | |
192 | ||
193 | spin_lock_init(&data->lock); | |
194 | ||
195 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
148e1134 TR |
196 | data->base = devm_ioremap_resource(&pdev->dev, res); |
197 | if (IS_ERR(data->base)) | |
198 | return PTR_ERR(data->base); | |
d142d6be RZ |
199 | |
200 | data->clk = devm_clk_get(&pdev->dev, NULL); | |
201 | if (IS_ERR(data->clk)) { | |
202 | dev_err(&pdev->dev, | |
203 | "failed to get clock, err=%ld\n", PTR_ERR(data->clk)); | |
204 | return PTR_ERR(data->clk); | |
205 | } | |
206 | ||
207 | ret = clk_prepare_enable(data->clk); | |
208 | if (ret) { | |
209 | dev_err(&pdev->dev, | |
210 | "clk_prepare_enable failed, err=%d\n", ret); | |
211 | return ret; | |
212 | } | |
213 | ||
e609108a MKB |
214 | tmp_dev = (struct of_device_id *) |
215 | of_match_device(usbmisc_imx_dt_ids, &pdev->dev); | |
216 | data->ops = (const struct usbmisc_ops *)tmp_dev->data; | |
00b9a1f9 | 217 | usbmisc = data; |
e609108a | 218 | ret = usbmisc_set_ops(data->ops); |
d142d6be | 219 | if (ret) { |
00b9a1f9 | 220 | usbmisc = NULL; |
d142d6be RZ |
221 | clk_disable_unprepare(data->clk); |
222 | return ret; | |
223 | } | |
224 | ||
d142d6be RZ |
225 | return 0; |
226 | } | |
227 | ||
a7bc2fdf | 228 | static int usbmisc_imx_remove(struct platform_device *pdev) |
d142d6be | 229 | { |
e609108a | 230 | usbmisc_unset_ops(usbmisc->ops); |
d142d6be | 231 | clk_disable_unprepare(usbmisc->clk); |
d48a24db | 232 | usbmisc = NULL; |
d142d6be RZ |
233 | return 0; |
234 | } | |
235 | ||
a7bc2fdf MG |
236 | static struct platform_driver usbmisc_imx_driver = { |
237 | .probe = usbmisc_imx_probe, | |
238 | .remove = usbmisc_imx_remove, | |
d142d6be | 239 | .driver = { |
a7bc2fdf | 240 | .name = "usbmisc_imx", |
d142d6be | 241 | .owner = THIS_MODULE, |
a7bc2fdf | 242 | .of_match_table = usbmisc_imx_dt_ids, |
d142d6be RZ |
243 | }, |
244 | }; | |
245 | ||
0404ae03 | 246 | module_platform_driver(usbmisc_imx_driver); |
d142d6be | 247 | |
a7bc2fdf | 248 | MODULE_ALIAS("platform:usbmisc-imx"); |
d142d6be | 249 | MODULE_LICENSE("GPL v2"); |
a7bc2fdf | 250 | MODULE_DESCRIPTION("driver for imx usb non-core registers"); |
d142d6be | 251 | MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>"); |