Low Frequency Periodic Singaling (LFPS) Peak-to-Peak Differential
Output Voltage Test Compliance fails using default transmitter settings
Change config of transmitter signal swings by setting register
PCSTXSWINGFULL to 0x47 to pass compliance tests.
Signed-off-by: Sriram Dash
Signed-off-by: Rajesh Bhagat
Signed-off-by: Suresh Gupta
Signed-off-by: Ran Wang
---
Change in v5:
Use clrsetbits_be32() instead.
Change in v4:
Update commit message about register setting.
Rename USB_PCSTXSWINGFULL to SCFG_USB_PCSTXSWINGFULL.
Change in v3:
- none
Change in v2:
In function erratum_a008997():
1.Put a blank line after variable declaration.
arch/arm/cpu/armv7/ls102xa/Kconfig| 6 ++
arch/arm/cpu/armv7/ls102xa/soc.c | 13 +
arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h | 3 +++
3 files changed, 22 insertions(+)
diff --git a/arch/arm/cpu/armv7/ls102xa/Kconfig
b/arch/arm/cpu/armv7/ls102xa/Kconfig
index f09766cf03..ee09dd6fed 100644
--- a/arch/arm/cpu/armv7/ls102xa/Kconfig
+++ b/arch/arm/cpu/armv7/ls102xa/Kconfig
@@ -7,6 +7,7 @@ config ARCH_LS1021A
select SYS_FSL_ERRATUM_A010315
select SYS_FSL_ERRATUM_A009008
select SYS_FSL_ERRATUM_A009798
+ select SYS_FSL_ERRATUM_A008997
select SYS_FSL_SRDS_1
select SYS_HAS_SERDES
select SYS_FSL_DDR_BE if SYS_FSL_DDR
@@ -64,6 +65,11 @@ config SYS_FSL_ERRATUM_A009798
help
Workaround for USB PHY erratum A009798
+config SYS_FSL_ERRATUM_A008997
+ bool
+ help
+ Workaround for USB PHY erratum A008997
+
config SYS_FSL_SRDS_1
bool
diff --git a/arch/arm/cpu/armv7/ls102xa/soc.c b/arch/arm/cpu/armv7/ls102xa/soc.c
index a0e3c85421..f409ad7f44 100644
--- a/arch/arm/cpu/armv7/ls102xa/soc.c
+++ b/arch/arm/cpu/armv7/ls102xa/soc.c
@@ -81,6 +81,18 @@ static void erratum_a009798(void)
#endif /* CONFIG_SYS_FSL_ERRATUM_A009798 */
}
+static void erratum_a008997(void)
+{
+#ifdef CONFIG_SYS_FSL_ERRATUM_A008997
+ u32 __iomem *scfg = (u32 __iomem *)SCFG_BASE;
+
+ clrsetbits_be32(scfg + SCFG_USB3PRM2CR / 4,
+ SCFG_USB_PCSTXSWINGFULL_MASK,
+ SCFG_USB_PCSTXSWINGFULL_VAL);
+#endif /* CONFIG_SYS_FSL_ERRATUM_A008997 */
+}
+
+
void s_init(void)
{
}
@@ -170,6 +182,7 @@ int arch_soc_init(void)
/* Erratum */
erratum_a009008();
erratum_a009798();
+ erratum_a008997();
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 5762d3308a..e5c06170da 100644
--- a/arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h
+++ b/arch/arm/include/asm/arch-ls102xa/immap_ls102xa.h
@@ -177,6 +177,9 @@ struct ccsr_gur {
#define SCFG_USB3PRM1CR0x070
#define SCFG_USB_TXVREFTUNE0x9
#define SCFG_USB_SQRXTUNE_MASK 0x7
+#define SCFG_USB3PRM2CR0x074
+#define SCFG_USB_PCSTXSWINGFULL_MASK 0xFE00
+#define SCFG_USB_PCSTXSWINGFULL_VAL0x8E00
/* Supplemental Configuration Unit */
struct ccsr_scfg {
--
2.14.1
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