#include <generic-phy.h>
#include <regmap.h>
#include <syscon.h>
+#include <linux/bitops.h>
+#include <linux/err.h>
#define OMAP_USB2_CALIBRATE_FALSE_DISCONNECT BIT(0)
+#define OMAP_USB2_DISABLE_CHG_DET BIT(1)
#define OMAP_DEV_PHY_PD BIT(0)
#define OMAP_USB2_PHY_PD BIT(28)
#define USB2PHY_DISCON_BYP_LATCH BIT(31)
#define USB2PHY_ANA_CONFIG1 (0x4c)
+#define AM654_USB2_OTG_PD BIT(8)
+#define AM654_USB2_VBUS_DET_EN BIT(5)
+#define AM654_USB2_VBUSVALID_DET_EN BIT(4)
+
+#define USB2PHY_CHRG_DET 0x14
+#define USB2PHY_USE_CHG_DET_REG BIT(29)
+#define USB2PHY_DIS_CHG_DET BIT(28)
+
DECLARE_GLOBAL_DATA_PTR;
struct omap_usb2_phy {
.power_off = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD,
};
+static const struct usb_phy_data am654_usb2_data = {
+ .label = "am654_usb2",
+ .flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
+ .mask = AM654_USB2_OTG_PD | AM654_USB2_VBUS_DET_EN |
+ AM654_USB2_VBUSVALID_DET_EN,
+ .power_on = AM654_USB2_VBUS_DET_EN | AM654_USB2_VBUSVALID_DET_EN,
+ .power_off = AM654_USB2_OTG_PD,
+};
+
static const struct udevice_id omap_usb2_id_table[] = {
{
.compatible = "ti,omap5-usb2",
.compatible = "ti,am437x-usb2",
.data = (ulong)&am437x_usb2_data,
},
+ {
+ .compatible = "ti,am654-usb2",
+ .data = (ulong)&am654_usb2_data,
+ },
{},
};
writel(val, priv->phy_base + USB2PHY_ANA_CONFIG1);
}
+ if (priv->flags & OMAP_USB2_DISABLE_CHG_DET) {
+ val = readl(priv->phy_base + USB2PHY_CHRG_DET);
+ val |= USB2PHY_USE_CHG_DET_REG | USB2PHY_DIS_CHG_DET;
+ writel(val, priv->phy_base + USB2PHY_CHRG_DET);
+ }
+
return 0;
}
if (!data)
return -EINVAL;
- if (data->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
- u32 base = dev_read_addr(dev);
+ priv->phy_base = dev_read_addr_ptr(dev);
+
+ if (!priv->phy_base)
+ return -EINVAL;
- if (base == FDT_ADDR_T_NONE)
- return -EINVAL;
- priv->phy_base = (void *)base;
+ if (data->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT)
priv->flags |= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;
- }
+
+ /*
+ * AM654x PG1.0 has a silicon bug that D+ is pulled high after
+ * POR, which could cause enumeration failure with some USB hubs.
+ * Disabling the USB2_PHY Charger Detect function will put D+
+ * into the normal state.
+ *
+ * Using property "ti,dis-chg-det-quirk" in the DT usb2-phy node
+ * to enable this workaround for AM654x PG1.0.
+ */
+ if (dev_read_bool(dev, "ti,dis-chg-det-quirk"))
+ priv->flags |= OMAP_USB2_DISABLE_CHG_DET;
regmap = syscon_regmap_lookup_by_phandle(dev, "syscon-phy-power");
if (!IS_ERR(regmap)) {