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#include <common.h>
#include <init.h>
#include <io.h>
#include <linux/err.h>
struct phy_control {
void (*phy_power)(struct phy_control *phy_ctrl, u32 id, bool on);
void (*phy_wkup)(struct phy_control *phy_ctrl, u32 id, bool on);
};
struct am335x_control_usb {
struct device_d *dev;
void __iomem *phy_reg;
void __iomem *wkup;
spinlock_t lock;
struct phy_control phy_ctrl;
};
#define AM335X_USB0_CTRL 0x0
#define AM335X_USB1_CTRL 0x8
#define AM335x_USB_WKUP 0x0
#define USBPHY_CM_PWRDN (1 << 0)
#define USBPHY_OTG_PWRDN (1 << 1)
#define USBPHY_OTGVDET_EN (1 << 19)
#define USBPHY_OTGSESSEND_EN (1 << 20)
#define AM335X_PHY0_WK_EN (1 << 0)
#define AM335X_PHY1_WK_EN (1 << 8)
static void am335x_phy_wkup(struct phy_control *phy_ctrl, u32 id, bool on)
{
struct am335x_control_usb *usb_ctrl;
u32 val;
u32 reg;
usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl);
switch (id) {
case 0:
reg = AM335X_PHY0_WK_EN;
break;
case 1:
reg = AM335X_PHY1_WK_EN;
break;
default:
WARN_ON(1);
return;
}
spin_lock(&usb_ctrl->lock);
val = readl(usb_ctrl->wkup);
if (on)
val |= reg;
else
val &= ~reg;
writel(val, usb_ctrl->wkup);
spin_unlock(&usb_ctrl->lock);
}
static void am335x_phy_power(struct phy_control *phy_ctrl, u32 id, bool on)
{
struct am335x_control_usb *usb_ctrl;
u32 val;
u32 reg;
usb_ctrl = container_of(phy_ctrl, struct am335x_control_usb, phy_ctrl);
switch (id) {
case 0:
reg = AM335X_USB0_CTRL;
break;
case 1:
reg = AM335X_USB1_CTRL;
break;
default:
WARN_ON(1);
return;
}
val = readl(usb_ctrl->phy_reg + reg);
if (on) {
val &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN);
val |= USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN;
} else {
val |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN;
}
writel(val, usb_ctrl->phy_reg + reg);
}
static const struct phy_control ctrl_am335x = {
.phy_power = am335x_phy_power,
.phy_wkup = am335x_phy_wkup,
};
static __maybe_unused struct of_device_id omap_control_usb_dt_ids[] = {
{
.compatible = "ti,am335x-usb-ctrl-module", .data = (unsigned long)&ctrl_am335x
}, {
/* sentinel */
},
};
struct phy_control *am335x_get_phy_control(struct device_d *dev)
{
struct device_node *node;
struct am335x_control_usb *ctrl_usb;
node = of_parse_phandle(dev->device_node, "ti,ctrl_mod", 0);
if (!node)
return NULL;
dev = of_find_device_by_node(node);
if (!dev)
return NULL;
ctrl_usb = dev->priv;
if (!ctrl_usb)
return NULL;
return &ctrl_usb->phy_ctrl;
}
EXPORT_SYMBOL(am335x_get_phy_control);
static int am335x_control_usb_probe(struct device_d *dev)
{
/*struct resource *res;*/
struct am335x_control_usb *ctrl_usb;
const struct phy_control *phy_ctrl;
int ret;
ret = dev_get_drvdata(dev, (unsigned long *)&phy_ctrl);
if (ret)
return ret;
ctrl_usb = xzalloc(sizeof(*ctrl_usb));
if (!ctrl_usb) {
dev_err(dev, "unable to alloc memory for control usb\n");
return -ENOMEM;
}
ctrl_usb->dev = dev;
ctrl_usb->phy_reg = dev_request_mem_region(dev, 0);
if (IS_ERR(ctrl_usb->phy_reg))
return PTR_ERR(ctrl_usb->phy_reg);
ctrl_usb->wkup = dev_request_mem_region(dev, 1);
if (IS_ERR(ctrl_usb->wkup))
return PTR_ERR(ctrl_usb->wkup);
spin_lock_init(&ctrl_usb->lock);
ctrl_usb->phy_ctrl = *phy_ctrl;
dev->priv = ctrl_usb;
return 0;
};
static struct driver_d am335x_control_driver = {
.name = "am335x-control-usb",
.probe = am335x_control_usb_probe,
.of_compatible = DRV_OF_COMPAT(omap_control_usb_dt_ids),
};
device_platform_driver(am335x_control_driver);
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