1 #include <linux/module.h>
2 #include <linux/platform_device.h>
3 #include <linux/dma-mapping.h>
4 #include <linux/usb/otg.h>
5 #include <linux/usb/usb_phy_generic.h>
6 #include <linux/slab.h>
9 #include <linux/of_address.h>
10 #include <linux/usb/of.h>
12 #include "phy-am335x-control.h"
13 #include "phy-generic.h"
16 struct usb_phy_generic usb_phy_gen;
17 struct phy_control *phy_ctrl;
19 enum usb_dr_mode dr_mode;
22 static int am335x_init(struct usb_phy *phy)
24 struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
26 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, true);
30 static void am335x_shutdown(struct usb_phy *phy)
32 struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
34 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false);
37 static int am335x_phy_probe(struct platform_device *pdev)
39 struct am335x_phy *am_phy;
40 struct device *dev = &pdev->dev;
43 am_phy = devm_kzalloc(dev, sizeof(*am_phy), GFP_KERNEL);
47 am_phy->phy_ctrl = am335x_get_phy_control(dev);
48 if (!am_phy->phy_ctrl)
51 am_phy->id = of_alias_get_id(pdev->dev.of_node, "phy");
53 dev_err(&pdev->dev, "Missing PHY id: %d\n", am_phy->id);
57 am_phy->dr_mode = of_usb_get_dr_mode_by_phy(pdev->dev.of_node, -1);
59 ret = usb_phy_gen_create_phy(dev, &am_phy->usb_phy_gen, NULL);
63 am_phy->usb_phy_gen.phy.init = am335x_init;
64 am_phy->usb_phy_gen.phy.shutdown = am335x_shutdown;
66 platform_set_drvdata(pdev, am_phy);
67 device_init_wakeup(dev, true);
70 * If we leave PHY wakeup enabled then AM33XX wakes up
71 * immediately from DS0. To avoid this we mark dev->power.can_wakeup
72 * to false. The same is checked in suspend routine to decide
73 * on whether to enable PHY wakeup or not.
74 * PHY wakeup works fine in standby mode, there by allowing us to
75 * handle remote wakeup, wakeup on disconnect and connect.
78 device_set_wakeup_enable(dev, false);
79 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false);
81 return usb_add_phy_dev(&am_phy->usb_phy_gen.phy);
84 static int am335x_phy_remove(struct platform_device *pdev)
86 struct am335x_phy *am_phy = platform_get_drvdata(pdev);
88 usb_remove_phy(&am_phy->usb_phy_gen.phy);
92 #ifdef CONFIG_PM_SLEEP
93 static int am335x_phy_suspend(struct device *dev)
95 struct platform_device *pdev = to_platform_device(dev);
96 struct am335x_phy *am_phy = platform_get_drvdata(pdev);
99 * Enable phy wakeup only if dev->power.can_wakeup is true.
100 * Make sure to enable wakeup to support remote wakeup in
101 * standby mode ( same is not supported in OFF(DS0) mode).
103 * echo enabled > /sys/bus/platform/devices/<usb-phy-id>/power/wakeup
106 if (device_may_wakeup(dev))
107 phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, true);
109 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false);
114 static int am335x_phy_resume(struct device *dev)
116 struct platform_device *pdev = to_platform_device(dev);
117 struct am335x_phy *am_phy = platform_get_drvdata(pdev);
119 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, true);
121 if (device_may_wakeup(dev))
122 phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, false);
128 static SIMPLE_DEV_PM_OPS(am335x_pm_ops, am335x_phy_suspend, am335x_phy_resume);
130 static const struct of_device_id am335x_phy_ids[] = {
131 { .compatible = "ti,am335x-usb-phy" },
134 MODULE_DEVICE_TABLE(of, am335x_phy_ids);
136 static struct platform_driver am335x_phy_driver = {
137 .probe = am335x_phy_probe,
138 .remove = am335x_phy_remove,
140 .name = "am335x-phy-driver",
141 .pm = &am335x_pm_ops,
142 .of_match_table = am335x_phy_ids,
146 module_platform_driver(am335x_phy_driver);
147 MODULE_LICENSE("GPL v2");