x86/xen: resume timer irqs early
[linux/fpc-iii.git] / drivers / usb / phy / phy-am335x-control.c
blob22cf07d62e4c68f04378b18a70555eb782ba25ff
1 #include <linux/module.h>
2 #include <linux/platform_device.h>
3 #include <linux/err.h>
4 #include <linux/of.h>
5 #include <linux/io.h>
7 struct phy_control {
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 {
13 struct device *dev;
14 void __iomem *phy_reg;
15 void __iomem *wkup;
16 spinlock_t lock;
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 static void am335x_phy_power(struct phy_control *phy_ctrl, u32 id, bool on)
31 struct am335x_control_usb *usb_ctrl;
32 u32 val;
33 u32 reg;
35 usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl);
37 switch (id) {
38 case 0:
39 reg = AM335X_USB0_CTRL;
40 break;
41 case 1:
42 reg = AM335X_USB1_CTRL;
43 break;
44 default:
45 WARN_ON(1);
46 return;
49 val = readl(usb_ctrl->phy_reg + reg);
50 if (on) {
51 val &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN);
52 val |= USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN;
53 } else {
54 val |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN;
57 writel(val, usb_ctrl->phy_reg + reg);
60 static const struct phy_control ctrl_am335x = {
61 .phy_power = am335x_phy_power,
64 static const struct of_device_id omap_control_usb_id_table[] = {
65 { .compatible = "ti,am335x-usb-ctrl-module", .data = &ctrl_am335x },
68 MODULE_DEVICE_TABLE(of, omap_control_usb_id_table);
70 static struct platform_driver am335x_control_driver;
71 static int match(struct device *dev, void *data)
73 struct device_node *node = (struct device_node *)data;
74 return dev->of_node == node &&
75 dev->driver == &am335x_control_driver.driver;
78 struct phy_control *am335x_get_phy_control(struct device *dev)
80 struct device_node *node;
81 struct am335x_control_usb *ctrl_usb;
83 node = of_parse_phandle(dev->of_node, "ti,ctrl_mod", 0);
84 if (!node)
85 return NULL;
87 dev = bus_find_device(&platform_bus_type, NULL, node, match);
88 ctrl_usb = dev_get_drvdata(dev);
89 if (!ctrl_usb)
90 return NULL;
91 return &ctrl_usb->phy_ctrl;
93 EXPORT_SYMBOL_GPL(am335x_get_phy_control);
95 static int am335x_control_usb_probe(struct platform_device *pdev)
97 struct resource *res;
98 struct am335x_control_usb *ctrl_usb;
99 const struct of_device_id *of_id;
100 const struct phy_control *phy_ctrl;
102 of_id = of_match_node(omap_control_usb_id_table, pdev->dev.of_node);
103 if (!of_id)
104 return -EINVAL;
106 phy_ctrl = of_id->data;
108 ctrl_usb = devm_kzalloc(&pdev->dev, sizeof(*ctrl_usb), GFP_KERNEL);
109 if (!ctrl_usb) {
110 dev_err(&pdev->dev, "unable to alloc memory for control usb\n");
111 return -ENOMEM;
114 ctrl_usb->dev = &pdev->dev;
116 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
117 ctrl_usb->phy_reg = devm_ioremap_resource(&pdev->dev, res);
118 if (IS_ERR(ctrl_usb->phy_reg))
119 return PTR_ERR(ctrl_usb->phy_reg);
120 spin_lock_init(&ctrl_usb->lock);
121 ctrl_usb->phy_ctrl = *phy_ctrl;
123 dev_set_drvdata(ctrl_usb->dev, ctrl_usb);
124 return 0;
127 static struct platform_driver am335x_control_driver = {
128 .probe = am335x_control_usb_probe,
129 .driver = {
130 .name = "am335x-control-usb",
131 .owner = THIS_MODULE,
132 .of_match_table = of_match_ptr(omap_control_usb_id_table),
136 module_platform_driver(am335x_control_driver);
137 MODULE_LICENSE("GPL v2");