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>

arch/arm/cpu/armv8/fsl-layerscape/Kconfig

@@ -17,6 +17,7 @@ config ARCH_LS1043A
 	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 @@ config ARCH_LS1046A
 	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 @@ config ARCH_LS2080A
 	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 @@ endmenu
 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"
 

arch/arm/cpu/armv8/fsl-layerscape/soc.c

@@ -119,6 +119,44 @@ static void erratum_a008997(void)
 #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 @@ void fsl_lsch3_early_init_f(void)
 	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 @@ void fsl_lsch2_early_init_f(void)
 	erratum_a009008();
 	erratum_a009798();
 	erratum_a008997();
+	erratum_a009007();
 }
 #endif
 

arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h

@@ -347,6 +347,14 @@ struct ccsr_gur {
 #define SCFG_USB_TXVREFTUNE			0x9
 #define SCFG_USB_SQRXTUNE_MASK		0x7
 #define SCFG_USB_PCSTXSWINGFULL		0x47
+#define SCFG_USB_PHY1			0x084F0000
+#define SCFG_USB_PHY2			0x08500000
+#define SCFG_USB_PHY3			0x08510000
+#define SCFG_USB_PHY_RX_OVRD_IN_HI		0x200c
+#define USB_PHY_RX_EQ_VAL_1		0x0000
+#define USB_PHY_RX_EQ_VAL_2		0x0080
+#define USB_PHY_RX_EQ_VAL_3		0x0380
+#define USB_PHY_RX_EQ_VAL_4		0x0b80
 
 #define SCFG_SNPCNFGCR_SECRDSNP		0x80000000
 #define SCFG_SNPCNFGCR_SECWRSNP		0x40000000

arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h

@@ -137,6 +137,15 @@
 #define SCFG_USB_SQRXTUNE_MASK	0x7
 #define SCFG_QSPICLKCTLR	0x10
 
+#define DCSR_BASE		0x700000000ULL
+#define DCSR_USB_PHY1			0x4600000
+#define DCSR_USB_PHY2			0x4610000
+#define DCSR_USB_PHY_RX_OVRD_IN_HI	0x200C
+#define USB_PHY_RX_EQ_VAL_1		0x0000
+#define USB_PHY_RX_EQ_VAL_2		0x0080
+#define USB_PHY_RX_EQ_VAL_3		0x0380
+#define USB_PHY_RX_EQ_VAL_4		0x0b80
+
 #define TP_ITYP_AV		0x00000001	/* Initiator available */
 #define TP_ITYP_TYPE(x)	(((x) & 0x6) >> 1)	/* Initiator Type */
 #define TP_ITYP_TYPE_ARM	0x0