armv7: Add workaround for USB erratum A-009008

USB High Speed (HS) EYE Height Adjustment
USB HS speed eye diagram fails with the default value at
many corners, particularly at a high temperature

Optimal eye at TXREFTUNE value to 0x9 is observed, change
set the same value.

Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
Signed-off-by: Suresh Gupta <suresh.gupta@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/armv7/ls102xa/Kconfig b/arch/arm/cpu/armv7/ls102xa/Kconfig
index 90d99e6..be30dd8 100644 (file)
--- a/arch/arm/cpu/armv7/ls102xa/Kconfig
+++ b/arch/arm/cpu/armv7/ls102xa/Kconfig
@@ -2,6 +2,7 @@ config ARCH_LS1021A
        bool
        select SYS_FSL_ERRATUM_A008378
        select SYS_FSL_ERRATUM_A008407
+       select SYS_FSL_ERRATUM_A009008
        select SYS_FSL_ERRATUM_A009663
        select SYS_FSL_ERRATUM_A009942
        select SYS_FSL_ERRATUM_A010315
@@ -58,6 +59,11 @@ config SYS_CCI400_OFFSET
          Offset for CCI400 base.
          CCI400 base addr = CCSRBAR + CCI400_OFFSET
 
+config SYS_FSL_ERRATUM_A009008
+       bool
+       help
+         Workaround for USB PHY erratum A009008
+
 config SYS_FSL_ERRATUM_A010315
        bool "Workaround for PCIe erratum A010315"
 

diff --git a/arch/arm/cpu/armv7/ls102xa/soc.c b/arch/arm/cpu/armv7/ls102xa/soc.c
index c043b82..eed06a3 100644 (file)
--- a/arch/arm/cpu/armv7/ls102xa/soc.c
+++ b/arch/arm/cpu/armv7/ls102xa/soc.c
@@ -60,6 +60,18 @@ unsigned int get_soc_major_rev(void)
        return major;
 }
 
+static void erratum_a009008(void)
+{
+#ifdef CONFIG_SYS_FSL_ERRATUM_A009008
+       u32 __iomem *scfg = (u32 __iomem *)SCFG_BASE;
+
+       clrsetbits_be32(scfg + SCFG_USB3PRM1CR / 4,
+                       0xF << 6,
+                       SCFG_USB_TXVREFTUNE << 6);
+#endif /* CONFIG_SYS_FSL_ERRATUM_A009008 */
+}
+
+
 void s_init(void)
 {
 }
@@ -147,6 +159,9 @@ int arch_soc_init(void)
         */
        out_be32(&scfg->eddrtqcfg, 0x63b20042);
 
+       /* Erratum */
+       erratum_a009008();
+
        return 0;
 }
 

diff --git a/arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h b/arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h
index 1415b0b..28c1a98 100644 (file)
--- a/arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h
+++ b/arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h
@@ -174,6 +174,10 @@ struct ccsr_gur {
 #define SCFG_PMCINTECR_ETSECERRG1      0x00040000
 #define SCFG_CLUSTERPMCR_WFIL2EN       0x80000000
 
+#define SCFG_BASE                      0x01570000
+#define SCFG_USB3PRM1CR                        0x070
+#define SCFG_USB_TXVREFTUNE            0x9
+
 /* Supplemental Configuration Unit */
 struct ccsr_scfg {
        u32 dpslpcr;