blob: 22cf07d62e4c68f04378b18a70555eb782ba25ff [file] [log] [blame]
Sebastian Andrzej Siewior3bb869c2013-07-30 21:43:45 +02001#include <linux/module.h>
2#include <linux/platform_device.h>
Sebastian Andrzej Siewior8b841cb2013-08-13 10:57:08 +02003#include <linux/err.h>
Sebastian Andrzej Siewior3bb869c2013-07-30 21:43:45 +02004#include <linux/of.h>
5#include <linux/io.h>
6
7struct 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);
10};
11
12struct 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;
18};
19
20#define AM335X_USB0_CTRL 0x0
21#define AM335X_USB1_CTRL 0x8
22#define AM335x_USB_WKUP 0x0
23
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)
28
29static void am335x_phy_power(struct phy_control *phy_ctrl, u32 id, bool on)
30{
31 struct am335x_control_usb *usb_ctrl;
32 u32 val;
33 u32 reg;
34
35 usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl);
36
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:
Sebastian Andrzej Siewior4ff74572013-08-16 17:32:49 +020045 WARN_ON(1);
46 return;
Sebastian Andrzej Siewior3bb869c2013-07-30 21:43:45 +020047 }
48
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;
55 }
56
57 writel(val, usb_ctrl->phy_reg + reg);
58}
59
60static const struct phy_control ctrl_am335x = {
61 .phy_power = am335x_phy_power,
62};
63
64static const struct of_device_id omap_control_usb_id_table[] = {
65 { .compatible = "ti,am335x-usb-ctrl-module", .data = &ctrl_am335x },
66 {}
67};
68MODULE_DEVICE_TABLE(of, omap_control_usb_id_table);
69
70static struct platform_driver am335x_control_driver;
71static int match(struct device *dev, void *data)
72{
73 struct device_node *node = (struct device_node *)data;
74 return dev->of_node == node &&
75 dev->driver == &am335x_control_driver.driver;
76}
77
78struct phy_control *am335x_get_phy_control(struct device *dev)
79{
80 struct device_node *node;
81 struct am335x_control_usb *ctrl_usb;
82
83 node = of_parse_phandle(dev->of_node, "ti,ctrl_mod", 0);
84 if (!node)
85 return NULL;
86
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;
92}
93EXPORT_SYMBOL_GPL(am335x_get_phy_control);
94
95static int am335x_control_usb_probe(struct platform_device *pdev)
96{
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;
101
102 of_id = of_match_node(omap_control_usb_id_table, pdev->dev.of_node);
103 if (!of_id)
104 return -EINVAL;
105
106 phy_ctrl = of_id->data;
107
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;
112 }
113
114 ctrl_usb->dev = &pdev->dev;
115
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;
122
123 dev_set_drvdata(ctrl_usb->dev, ctrl_usb);
124 return 0;
125}
126
127static 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),
133 },
134};
135
136module_platform_driver(am335x_control_driver);
137MODULE_LICENSE("GPL v2");