usb: phy: mxs: Enable IC fixes for related SoCs
Two PHY bugs are fixed by IC logic, but these bits are not
enabled by default, so we enable them at driver.
The two bugs are: MXS_PHY_ABNORMAL_IN_SUSPEND and MXS_PHY_SENDING_SOF_TOO_FAST
which are described at code.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c
index 1663a66..cb71135 100644
--- a/drivers/usb/phy/phy-mxs-usb.c
+++ b/drivers/usb/phy/phy-mxs-usb.c
@@ -31,6 +31,10 @@
#define HW_USBPHY_CTRL_SET 0x34
#define HW_USBPHY_CTRL_CLR 0x38
+#define HW_USBPHY_IP 0x90
+#define HW_USBPHY_IP_SET 0x94
+#define HW_USBPHY_IP_CLR 0x98
+
#define BM_USBPHY_CTRL_SFTRST BIT(31)
#define BM_USBPHY_CTRL_CLKGATE BIT(30)
#define BM_USBPHY_CTRL_ENAUTOSET_USBCLKS BIT(26)
@@ -42,6 +46,8 @@
#define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14)
#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1)
+#define BM_USBPHY_IP_FIX (BIT(17) | BIT(18))
+
#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)
/* Do disconnection between PHY and controller without vbus */
@@ -60,6 +66,14 @@
*/
#define MXS_PHY_SENDING_SOF_TOO_FAST BIT(2)
+/*
+ * IC has bug fixes logic, they include
+ * MXS_PHY_ABNORMAL_IN_SUSPEND and MXS_PHY_SENDING_SOF_TOO_FAST
+ * which are described at above flags, the RTL will handle it
+ * according to different versions.
+ */
+#define MXS_PHY_NEED_IP_FIX BIT(3)
+
struct mxs_phy_data {
unsigned int flags;
};
@@ -70,11 +84,13 @@
static const struct mxs_phy_data imx6q_phy_data = {
.flags = MXS_PHY_SENDING_SOF_TOO_FAST |
- MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS,
+ MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS |
+ MXS_PHY_NEED_IP_FIX,
};
static const struct mxs_phy_data imx6sl_phy_data = {
- .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS,
+ .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS |
+ MXS_PHY_NEED_IP_FIX,
};
static const struct of_device_id mxs_phy_dt_ids[] = {
@@ -118,6 +134,9 @@
BM_USBPHY_CTRL_ENUTMILEVEL3,
base + HW_USBPHY_CTRL_SET);
+ if (mxs_phy->data->flags & MXS_PHY_NEED_IP_FIX)
+ writel(BM_USBPHY_IP_FIX, base + HW_USBPHY_IP_SET);
+
return 0;
}