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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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36
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 struct omap_usb *phy = phy_to_omapusb(x);
102 int ret;
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", ret);
112 return ret;
113 }
114 omap_control_usb_phy_power(phy->control_dev, 1);
115 phy->is_suspended = 0;
116 }
117
118 return 0;
119}
120
121static int omap_usb2_probe(struct platform_device *pdev)
122{
123 struct omap_usb *phy;
124 struct usb_otg *otg;
125
126 phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
127 if (!phy) {
128 dev_err(&pdev->dev, "unable to allocate memory for USB2 PHY\n");
129 return -ENOMEM;
130 }
131
132 otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
133 if (!otg) {
134 dev_err(&pdev->dev, "unable to allocate memory for USB OTG\n");
135 return -ENOMEM;
136 }
137
138 phy->dev = &pdev->dev;
139
140 phy->phy.dev = phy->dev;
141 phy->phy.label = "omap-usb2";
142 phy->phy.set_suspend = omap_usb2_suspend;
143 phy->phy.otg = otg;
144 phy->phy.type = USB_PHY_TYPE_USB2;
145
146 phy->control_dev = omap_get_control_dev();
147 if (IS_ERR(phy->control_dev)) {
148 dev_dbg(&pdev->dev, "Failed to get control device\n");
149 return -ENODEV;
150 }
151
152 phy->is_suspended = 1;
153 omap_control_usb_phy_power(phy->control_dev, 0);
154
155 otg->set_host = omap_usb_set_host;
156 otg->set_peripheral = omap_usb_set_peripheral;
157 otg->set_vbus = omap_usb_set_vbus;
158 otg->start_srp = omap_usb_start_srp;
159 otg->phy = &phy->phy;
160
161 phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
162 if (IS_ERR(phy->wkupclk)) {
163 dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
164 return PTR_ERR(phy->wkupclk);
165 }
166 clk_prepare(phy->wkupclk);
167
168 phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
169 if (IS_ERR(phy->optclk))
170 dev_vdbg(&pdev->dev, "unable to get refclk960m\n");
171 else
172 clk_prepare(phy->optclk);
173
174 usb_add_phy_dev(&phy->phy);
175
176 platform_set_drvdata(pdev, phy);
177
178 pm_runtime_enable(phy->dev);
179
180 return 0;
181}
182
183static int omap_usb2_remove(struct platform_device *pdev)
184{
185 struct omap_usb *phy = platform_get_drvdata(pdev);
186
187 clk_unprepare(phy->wkupclk);
188 if (!IS_ERR(phy->optclk))
189 clk_unprepare(phy->optclk);
190 usb_remove_phy(&phy->phy);
191
192 return 0;
193}
194
195#ifdef CONFIG_PM_RUNTIME
196
197static int omap_usb2_runtime_suspend(struct device *dev)
198{
199 struct platform_device *pdev = to_platform_device(dev);
200 struct omap_usb *phy = platform_get_drvdata(pdev);
201
202 clk_disable(phy->wkupclk);
203 if (!IS_ERR(phy->optclk))
204 clk_disable(phy->optclk);
205
206 return 0;
207}
208
209static int omap_usb2_runtime_resume(struct device *dev)
210{
211 struct platform_device *pdev = to_platform_device(dev);
212 struct omap_usb *phy = platform_get_drvdata(pdev);
213 int ret;
214
215 ret = clk_enable(phy->wkupclk);
216 if (ret < 0) {
217 dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
218 goto err0;
219 }
220
221 if (!IS_ERR(phy->optclk)) {
222 ret = clk_enable(phy->optclk);
223 if (ret < 0) {
224 dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
225 goto err1;
226 }
227 }
228
229 return 0;
230
231err1:
232 clk_disable(phy->wkupclk);
233
234err0:
235 return ret;
236}
237
238static const struct dev_pm_ops omap_usb2_pm_ops = {
239 SET_RUNTIME_PM_OPS(omap_usb2_runtime_suspend, omap_usb2_runtime_resume,
240 NULL)
241};
242
243#define DEV_PM_OPS (&omap_usb2_pm_ops)
244#else
245#define DEV_PM_OPS NULL
246#endif
247
248#ifdef CONFIG_OF
249static const struct of_device_id omap_usb2_id_table[] = {
250 { .compatible = "ti,omap-usb2" },
251 {}
252};
253MODULE_DEVICE_TABLE(of, omap_usb2_id_table);
254#endif
255
256static struct platform_driver omap_usb2_driver = {
257 .probe = omap_usb2_probe,
258 .remove = omap_usb2_remove,
259 .driver = {
260 .name = "omap-usb2",
261 .owner = THIS_MODULE,
262 .pm = DEV_PM_OPS,
263 .of_match_table = of_match_ptr(omap_usb2_id_table),
264 },
265};
266
267module_platform_driver(omap_usb2_driver);
268
269MODULE_ALIAS("platform: omap_usb2");
270MODULE_AUTHOR("Texas Instruments Inc.");
271MODULE_DESCRIPTION("OMAP USB2 phy driver");
272MODULE_LICENSE("GPL v2");
273
