1 files changed, 168 insertions, 0 deletions
diff --git a/drivers/usb/musb/phy-am335x-control.c b/drivers/usb/musb/phy-am335x-control.c
new file mode 100644
index 0000000000..a241c84fed
--- /dev/null
+++ b/drivers/usb/musb/phy-am335x-control.c
@@ -0,0 +1,168 @@
+#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);