armv8: Add workaround for USB erratum A-009007
Rx Compliance tests may fail intermittently at high
jitter frequencies using default register values.
Program register USB_PHY_RX_OVRD_IN_HI in certain sequence
to make the Rx compliance test pass.
Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
Signed-off-by: Suresh Gupta <suresh.bhagat@nxp.com>
Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
[YS: Reordered Kconfig options]
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
index b6410d7..3518d86 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
+++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -17,6 +17,7 @@
select SYS_FSL_DDR_VER_50
select SYS_FSL_ERRATUM_A008850
select SYS_FSL_ERRATUM_A008997
+ select SYS_FSL_ERRATUM_A009007
select SYS_FSL_ERRATUM_A009008
select SYS_FSL_ERRATUM_A009660
select SYS_FSL_ERRATUM_A009663
@@ -43,6 +44,7 @@
select SYS_FSL_ERRATUM_A008511
select SYS_FSL_ERRATUM_A008850
select SYS_FSL_ERRATUM_A008997
+ select SYS_FSL_ERRATUM_A009007
select SYS_FSL_ERRATUM_A009008
select SYS_FSL_ERRATUM_A009798
select SYS_FSL_ERRATUM_A009801
@@ -107,6 +109,7 @@
select SYS_FSL_ERRATUM_A008514
select SYS_FSL_ERRATUM_A008585
select SYS_FSL_ERRATUM_A008997
+ select SYS_FSL_ERRATUM_A009007
select SYS_FSL_ERRATUM_A009008
select SYS_FSL_ERRATUM_A009635
select SYS_FSL_ERRATUM_A009663
@@ -260,6 +263,11 @@
config SYS_FSL_ERRATUM_A008997
bool "Workaround for USB PHY erratum A008997"
+config SYS_FSL_ERRATUM_A009007
+ bool
+ help
+ Workaround for USB PHY erratum A009007
+
config SYS_FSL_ERRATUM_A009008
bool "Workaround for USB PHY erratum A009008"
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
index c7180f1..6698c04 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
@@ -119,6 +119,44 @@
#endif /* CONFIG_SYS_FSL_ERRATUM_A008997 */
}
+#if defined(CONFIG_ARCH_LS1043A) || defined(CONFIG_ARCH_LS1046A)
+
+#define PROGRAM_USB_PHY_RX_OVRD_IN_HI(phy) \
+ out_be16((phy) + SCFG_USB_PHY_RX_OVRD_IN_HI, USB_PHY_RX_EQ_VAL_1); \
+ out_be16((phy) + SCFG_USB_PHY_RX_OVRD_IN_HI, USB_PHY_RX_EQ_VAL_2); \
+ out_be16((phy) + SCFG_USB_PHY_RX_OVRD_IN_HI, USB_PHY_RX_EQ_VAL_3); \
+ out_be16((phy) + SCFG_USB_PHY_RX_OVRD_IN_HI, USB_PHY_RX_EQ_VAL_4)
+
+#elif defined(CONFIG_ARCH_LS2080A)
+
+#define PROGRAM_USB_PHY_RX_OVRD_IN_HI(phy) \
+ out_le16((phy) + DCSR_USB_PHY_RX_OVRD_IN_HI, USB_PHY_RX_EQ_VAL_1); \
+ out_le16((phy) + DCSR_USB_PHY_RX_OVRD_IN_HI, USB_PHY_RX_EQ_VAL_2); \
+ out_le16((phy) + DCSR_USB_PHY_RX_OVRD_IN_HI, USB_PHY_RX_EQ_VAL_3); \
+ out_le16((phy) + DCSR_USB_PHY_RX_OVRD_IN_HI, USB_PHY_RX_EQ_VAL_4)
+
+#endif
+
+static void erratum_a009007(void)
+{
+#if defined(CONFIG_ARCH_LS1043A) || defined(CONFIG_ARCH_LS1046A)
+ void __iomem *usb_phy = (void __iomem *)SCFG_USB_PHY1;
+
+ PROGRAM_USB_PHY_RX_OVRD_IN_HI(usb_phy);
+
+ usb_phy = (void __iomem *)SCFG_USB_PHY2;
+ PROGRAM_USB_PHY_RX_OVRD_IN_HI(usb_phy);
+
+ usb_phy = (void __iomem *)SCFG_USB_PHY3;
+ PROGRAM_USB_PHY_RX_OVRD_IN_HI(usb_phy);
+#elif defined(CONFIG_ARCH_LS2080A)
+ void __iomem *dcsr = (void __iomem *)DCSR_BASE;
+
+ PROGRAM_USB_PHY_RX_OVRD_IN_HI(dcsr + DCSR_USB_PHY1);
+ PROGRAM_USB_PHY_RX_OVRD_IN_HI(dcsr + DCSR_USB_PHY2);
+#endif /* CONFIG_SYS_FSL_ERRATUM_A009007 */
+}
+
#if defined(CONFIG_FSL_LSCH3)
/*
* This erratum requires setting a value to eddrtqcr1 to
@@ -268,6 +306,7 @@
erratum_a009008();
erratum_a009798();
erratum_a008997();
+ erratum_a009007();
#ifdef CONFIG_CHAIN_OF_TRUST
/* In case of Secure Boot, the IBR configures the SMMU
* to allow only Secure transactions.
@@ -549,6 +588,7 @@
erratum_a009008();
erratum_a009798();
erratum_a008997();
+ erratum_a009007();
}
#endif