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>

1 files changed, 21 insertions, 2 deletions

diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c
index 1663a6683ec1..cb7113543153 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 imx23_phy_data = {
 
 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 @@ static int mxs_phy_hw_init(struct mxs_phy *mxs_phy)
                 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;
 }