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19#include <linux/module.h>
20#include <linux/platform_device.h>
21#include <linux/slab.h>
22#include <linux/of.h>
23#include <linux/io.h>
24#include <linux/usb/omap_usb.h>
25#include <linux/usb/phy_companion.h>
26#include <linux/clk.h>
27#include <linux/err.h>
28#include <linux/pm_runtime.h>
29#include <linux/delay.h>
30#include <linux/usb/omap_control_usb.h>
31
32
33
34
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37
38
39
40
41
42int omap_usb2_set_comparator(struct phy_companion *comparator)
43{
44 struct omap_usb *phy;
45 struct usb_phy *x = usb_get_phy(USB_PHY_TYPE_USB2);
46
47 if (IS_ERR(x))
48 return -ENODEV;
49
50 phy = phy_to_omapusb(x);
51 phy->comparator = comparator;
52 return 0;
53}
54EXPORT_SYMBOL_GPL(omap_usb2_set_comparator);
55
56static int omap_usb_set_vbus(struct usb_otg *otg, bool enabled)
57{
58 struct omap_usb *phy = phy_to_omapusb(otg->phy);
59
60 if (!phy->comparator)
61 return -ENODEV;
62
63 return phy->comparator->set_vbus(phy->comparator, enabled);
64}
65
66static int omap_usb_start_srp(struct usb_otg *otg)
67{
68 struct omap_usb *phy = phy_to_omapusb(otg->phy);
69
70 if (!phy->comparator)
71 return -ENODEV;
72
73 return phy->comparator->start_srp(phy->comparator);
74}
75
76static int omap_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
77{
78 struct usb_phy *phy = otg->phy;
79
80 otg->host = host;
81 if (!host)
82 phy->state = OTG_STATE_UNDEFINED;
83
84 return 0;
85}
86
87static int omap_usb_set_peripheral(struct usb_otg *otg,
88 struct usb_gadget *gadget)
89{
90 struct usb_phy *phy = otg->phy;
91
92 otg->gadget = gadget;
93 if (!gadget)
94 phy->state = OTG_STATE_UNDEFINED;
95
96 return 0;
97}
98
99static int omap_usb2_suspend(struct usb_phy *x, int suspend)
100{
101 u32 ret;
102 struct omap_usb *phy = phy_to_omapusb(x);
103
104 if (suspend && !phy->is_suspended) {
105 omap_control_usb_phy_power(phy->control_dev, 0);
106 pm_runtime_put_sync(phy->dev);
107 phy->is_suspended = 1;
108 } else if (!suspend && phy->is_suspended) {
109 ret = pm_runtime_get_sync(phy->dev);
110 if (ret < 0) {
111 dev_err(phy->dev, "get_sync failed with err %d\n",
112 ret);
113 return ret;
114 }
115 omap_control_usb_phy_power(phy->control_dev, 1);
116 phy->is_suspended = 0;
117 }
118
119 return 0;
120}
121
122static int omap_usb2_probe(struct platform_device *pdev)
123{
124 struct omap_usb *phy;
125 struct usb_otg *otg;
126
127 phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
128 if (!phy) {
129 dev_err(&pdev->dev, "unable to allocate memory for USB2 PHY\n");
130 return -ENOMEM;
131 }
132
133 otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
134 if (!otg) {
135 dev_err(&pdev->dev, "unable to allocate memory for USB OTG\n");
136 return -ENOMEM;
137 }
138
139 phy->dev = &pdev->dev;
140
141 phy->phy.dev = phy->dev;
142 phy->phy.label = "omap-usb2";
143 phy->phy.set_suspend = omap_usb2_suspend;
144 phy->phy.otg = otg;
145 phy->phy.type = USB_PHY_TYPE_USB2;
146
147 phy->control_dev = omap_get_control_dev();
148 if (IS_ERR(phy->control_dev)) {
149 dev_dbg(&pdev->dev, "Failed to get control device\n");
150 return -ENODEV;
151 }
152
153 phy->is_suspended = 1;
154 omap_control_usb_phy_power(phy->control_dev, 0);
155
156 otg->set_host = omap_usb_set_host;
157 otg->set_peripheral = omap_usb_set_peripheral;
158 otg->set_vbus = omap_usb_set_vbus;
159 otg->start_srp = omap_usb_start_srp;
160 otg->phy = &phy->phy;
161
162 phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
163 if (IS_ERR(phy->wkupclk)) {
164 dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
165 return PTR_ERR(phy->wkupclk);
166 }
167 clk_prepare(phy->wkupclk);
168
169 phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
170 if (IS_ERR(phy->optclk))
171 dev_vdbg(&pdev->dev, "unable to get refclk960m\n");
172 else
173 clk_prepare(phy->optclk);
174
175 usb_add_phy_dev(&phy->phy);
176
177 platform_set_drvdata(pdev, phy);
178
179 pm_runtime_enable(phy->dev);
180
181 return 0;
182}
183
184static int omap_usb2_remove(struct platform_device *pdev)
185{
186 struct omap_usb *phy = platform_get_drvdata(pdev);
187
188 clk_unprepare(phy->wkupclk);
189 if (!IS_ERR(phy->optclk))
190 clk_unprepare(phy->optclk);
191 usb_remove_phy(&phy->phy);
192
193 return 0;
194}
195
196#ifdef CONFIG_PM_RUNTIME
197
198static int omap_usb2_runtime_suspend(struct device *dev)
199{
200 struct platform_device *pdev = to_platform_device(dev);
201 struct omap_usb *phy = platform_get_drvdata(pdev);
202
203 clk_disable(phy->wkupclk);
204 if (!IS_ERR(phy->optclk))
205 clk_disable(phy->optclk);
206
207 return 0;
208}
209
210static int omap_usb2_runtime_resume(struct device *dev)
211{
212 u32 ret = 0;
213 struct platform_device *pdev = to_platform_device(dev);
214 struct omap_usb *phy = platform_get_drvdata(pdev);
215
216 ret = clk_enable(phy->wkupclk);
217 if (ret < 0) {
218 dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
219 goto err0;
220 }
221
222 if (!IS_ERR(phy->optclk)) {
223 ret = clk_enable(phy->optclk);
224 if (ret < 0) {
225 dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
226 goto err1;
227 }
228 }
229
230 return 0;
231
232err1:
233 clk_disable(phy->wkupclk);
234
235err0:
236 return ret;
237}
238
239static const struct dev_pm_ops omap_usb2_pm_ops = {
240 SET_RUNTIME_PM_OPS(omap_usb2_runtime_suspend, omap_usb2_runtime_resume,
241 NULL)
242};
243
244#define DEV_PM_OPS (&omap_usb2_pm_ops)
245#else
246#define DEV_PM_OPS NULL
247#endif
248
249#ifdef CONFIG_OF
250static const struct of_device_id omap_usb2_id_table[] = {
251 { .compatible = "ti,omap-usb2" },
252 {}
253};
254MODULE_DEVICE_TABLE(of, omap_usb2_id_table);
255#endif
256
257static struct platform_driver omap_usb2_driver = {
258 .probe = omap_usb2_probe,
259 .remove = omap_usb2_remove,
260 .driver = {
261 .name = "omap-usb2",
262 .owner = THIS_MODULE,
263 .pm = DEV_PM_OPS,
264 .of_match_table = of_match_ptr(omap_usb2_id_table),
265 },
266};
267
268module_platform_driver(omap_usb2_driver);
269
270MODULE_ALIAS("platform: omap_usb2");
271MODULE_AUTHOR("Texas Instruments Inc.");
272MODULE_DESCRIPTION("OMAP USB2 phy driver");
273MODULE_LICENSE("GPL v2");
274
