1 #include <linux/module.h>
2 #include <linux/platform_device.h>
6 #include "am35x-phy-control.h"
8 struct am335x_control_usb {
10 void __iomem *phy_reg;
13 struct phy_control phy_ctrl;
16 #define AM335X_USB0_CTRL 0x0
17 #define AM335X_USB1_CTRL 0x8
18 #define AM335x_USB_WKUP 0x0
20 #define USBPHY_CM_PWRDN (1 << 0)
21 #define USBPHY_OTG_PWRDN (1 << 1)
22 #define USBPHY_OTGVDET_EN (1 << 19)
23 #define USBPHY_OTGSESSEND_EN (1 << 20)
25 #define AM335X_PHY0_WK_EN (1 << 0)
26 #define AM335X_PHY1_WK_EN (1 << 8)
28 static void am335x_phy_wkup(struct phy_control *phy_ctrl, u32 id, bool on)
30 struct am335x_control_usb *usb_ctrl;
34 usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl);
38 reg = AM335X_PHY0_WK_EN;
41 reg = AM335X_PHY1_WK_EN;
48 spin_lock(&usb_ctrl->lock);
49 val = readl(usb_ctrl->wkup);
56 writel(val, usb_ctrl->wkup);
57 spin_unlock(&usb_ctrl->lock);
60 static void am335x_phy_power(struct phy_control *phy_ctrl, u32 id, bool on)
62 struct am335x_control_usb *usb_ctrl;
66 usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl);
70 reg = AM335X_USB0_CTRL;
73 reg = AM335X_USB1_CTRL;
80 val = readl(usb_ctrl->phy_reg + reg);
82 val &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN);
83 val |= USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN;
85 val |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN;
88 writel(val, usb_ctrl->phy_reg + reg);
91 static const struct phy_control ctrl_am335x = {
92 .phy_power = am335x_phy_power,
93 .phy_wkup = am335x_phy_wkup,
96 static const struct of_device_id omap_control_usb_id_table[] = {
97 { .compatible = "ti,am335x-usb-ctrl-module", .data = &ctrl_am335x },
100 MODULE_DEVICE_TABLE(of, omap_control_usb_id_table);
102 static struct platform_driver am335x_control_driver;
103 static int match(struct device *dev, void *data)
105 struct device_node *node = (struct device_node *)data;
106 return dev->of_node == node &&
107 dev->driver == &am335x_control_driver.driver;
110 struct phy_control *am335x_get_phy_control(struct device *dev)
112 struct device_node *node;
113 struct am335x_control_usb *ctrl_usb;
115 node = of_parse_phandle(dev->of_node, "ti,ctrl_mod", 0);
119 dev = bus_find_device(&platform_bus_type, NULL, node, match);
120 ctrl_usb = dev_get_drvdata(dev);
123 return &ctrl_usb->phy_ctrl;
125 EXPORT_SYMBOL_GPL(am335x_get_phy_control);
127 static int am335x_control_usb_probe(struct platform_device *pdev)
129 struct resource *res;
130 struct am335x_control_usb *ctrl_usb;
131 const struct of_device_id *of_id;
132 const struct phy_control *phy_ctrl;
134 of_id = of_match_node(omap_control_usb_id_table, pdev->dev.of_node);
138 phy_ctrl = of_id->data;
140 ctrl_usb = devm_kzalloc(&pdev->dev, sizeof(*ctrl_usb), GFP_KERNEL);
142 dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
146 ctrl_usb->dev = &pdev->dev;
148 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
149 ctrl_usb->phy_reg = devm_ioremap_resource(&pdev->dev, res);
150 if (IS_ERR(ctrl_usb->phy_reg))
151 return PTR_ERR(ctrl_usb->phy_reg);
153 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "wakeup");
154 ctrl_usb->wkup = devm_ioremap_resource(&pdev->dev, res);
155 if (IS_ERR(ctrl_usb->wkup))
156 return PTR_ERR(ctrl_usb->wkup);
158 spin_lock_init(&ctrl_usb->lock);
159 ctrl_usb->phy_ctrl = *phy_ctrl;
161 dev_set_drvdata(ctrl_usb->dev, ctrl_usb);
165 static struct platform_driver am335x_control_driver = {
166 .probe = am335x_control_usb_probe,
168 .name = "am335x-control-usb",
169 .owner = THIS_MODULE,
170 .of_match_table = omap_control_usb_id_table,
174 module_platform_driver(am335x_control_driver);
175 MODULE_LICENSE("GPL v2");