1 #include <linux/module.h>
2 #include <linux/platform_device.h>
8 void (*phy_power)(struct phy_control *phy_ctrl, u32 id, bool on);
9 void (*phy_wkup)(struct phy_control *phy_ctrl, u32 id, bool on);
12 struct am335x_control_usb {
14 void __iomem *phy_reg;
17 struct phy_control phy_ctrl;
20 #define AM335X_USB0_CTRL 0x0
21 #define AM335X_USB1_CTRL 0x8
22 #define AM335x_USB_WKUP 0x0
24 #define USBPHY_CM_PWRDN (1 << 0)
25 #define USBPHY_OTG_PWRDN (1 << 1)
26 #define USBPHY_OTGVDET_EN (1 << 19)
27 #define USBPHY_OTGSESSEND_EN (1 << 20)
29 #define AM335X_PHY0_WK_EN (1 << 0)
30 #define AM335X_PHY1_WK_EN (1 << 8)
32 static void am335x_phy_wkup(struct phy_control *phy_ctrl, u32 id, bool on)
34 struct am335x_control_usb *usb_ctrl;
38 usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl);
42 reg = AM335X_PHY0_WK_EN;
45 reg = AM335X_PHY1_WK_EN;
52 spin_lock(&usb_ctrl->lock);
53 val = readl(usb_ctrl->wkup);
60 writel(val, usb_ctrl->wkup);
61 spin_unlock(&usb_ctrl->lock);
64 static void am335x_phy_power(struct phy_control *phy_ctrl, u32 id, bool on)
66 struct am335x_control_usb *usb_ctrl;
70 usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl);
74 reg = AM335X_USB0_CTRL;
77 reg = AM335X_USB1_CTRL;
84 val = readl(usb_ctrl->phy_reg + reg);
86 val &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN);
87 val |= USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN;
89 val |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN;
92 writel(val, usb_ctrl->phy_reg + reg);
95 static const struct phy_control ctrl_am335x = {
96 .phy_power = am335x_phy_power,
97 .phy_wkup = am335x_phy_wkup,
100 static const struct of_device_id omap_control_usb_id_table[] = {
101 { .compatible = "ti,am335x-usb-ctrl-module", .data = &ctrl_am335x },
104 MODULE_DEVICE_TABLE(of, omap_control_usb_id_table);
106 static struct platform_driver am335x_control_driver;
107 static int match(struct device *dev, void *data)
109 struct device_node *node = (struct device_node *)data;
110 return dev->of_node == node &&
111 dev->driver == &am335x_control_driver.driver;
114 struct phy_control *am335x_get_phy_control(struct device *dev)
116 struct device_node *node;
117 struct am335x_control_usb *ctrl_usb;
119 node = of_parse_phandle(dev->of_node, "ti,ctrl_mod", 0);
123 dev = bus_find_device(&platform_bus_type, NULL, node, match);
124 ctrl_usb = dev_get_drvdata(dev);
127 return &ctrl_usb->phy_ctrl;
129 EXPORT_SYMBOL_GPL(am335x_get_phy_control);
131 static int am335x_control_usb_probe(struct platform_device *pdev)
133 struct resource *res;
134 struct am335x_control_usb *ctrl_usb;
135 const struct of_device_id *of_id;
136 const struct phy_control *phy_ctrl;
138 of_id = of_match_node(omap_control_usb_id_table, pdev->dev.of_node);
142 phy_ctrl = of_id->data;
144 ctrl_usb = devm_kzalloc(&pdev->dev, sizeof(*ctrl_usb), GFP_KERNEL);
146 dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
150 ctrl_usb->dev = &pdev->dev;
152 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
153 ctrl_usb->phy_reg = devm_ioremap_resource(&pdev->dev, res);
154 if (IS_ERR(ctrl_usb->phy_reg))
155 return PTR_ERR(ctrl_usb->phy_reg);
157 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "wakeup");
158 ctrl_usb->wkup = devm_ioremap_resource(&pdev->dev, res);
159 if (IS_ERR(ctrl_usb->wkup))
160 return PTR_ERR(ctrl_usb->wkup);
162 spin_lock_init(&ctrl_usb->lock);
163 ctrl_usb->phy_ctrl = *phy_ctrl;
165 dev_set_drvdata(ctrl_usb->dev, ctrl_usb);
169 static struct platform_driver am335x_control_driver = {
170 .probe = am335x_control_usb_probe,
172 .name = "am335x-control-usb",
173 .owner = THIS_MODULE,
174 .of_match_table = omap_control_usb_id_table,
178 module_platform_driver(am335x_control_driver);
179 MODULE_LICENSE("GPL v2");