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[U-Boot,09/28] armv8/ls2085a: Add workaround for USB erratum A-008751

Message ID 1426783559-26610-9-git-send-email-yorksun@freescale.com
State Superseded
Delegated to: York Sun
Headers show

Commit Message

York Sun March 19, 2015, 4:45 p.m. UTC 
From: Scott Wood <scottwood@freescale.com>

Without this "USB may not work" according to the erratum text, though I
did not notice a problem without it.

Signed-off-by: Scott Wood <scottwood@freescale.com>
---
 arch/arm/cpu/armv8/fsl-lsch3/soc.c           |   11 +++++++++++
 arch/arm/include/asm/arch-fsl-lsch3/config.h |    5 +++++
 2 files changed, 16 insertions(+)
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Patch

diff --git a/arch/arm/cpu/armv8/fsl-lsch3/soc.c b/arch/arm/cpu/armv8/fsl-lsch3/soc.c
index 242a865..17700ef 100644
--- a/arch/arm/cpu/armv8/fsl-lsch3/soc.c
+++ b/arch/arm/cpu/armv8/fsl-lsch3/soc.c
@@ -7,8 +7,19 @@ 
 #include <common.h>
 #include <fsl_ifc.h>
 #include <asm/arch-fsl-lsch3/soc.h>
+#include <asm/io.h>
+
+static void erratum_a008751(void)
+{
+#ifdef CONFIG_SYS_FSL_ERRATUM_A008751
+	u32 __iomem *scfg = (u32 __iomem *)SCFG_BASE;
+
+	writel(0x27672b2a, scfg + SCFG_USB3PRM1CR / 4);
+#endif
+}
 
 void fsl_lsch3_early_init_f(void)
 {
+	erratum_a008751();
 	init_early_memctl_regs();	/* tighten IFC timing */
 }
diff --git a/arch/arm/include/asm/arch-fsl-lsch3/config.h b/arch/arm/include/asm/arch-fsl-lsch3/config.h
index 9121452..a81e3ed 100644
--- a/arch/arm/include/asm/arch-fsl-lsch3/config.h
+++ b/arch/arm/include/asm/arch-fsl-lsch3/config.h
@@ -124,6 +124,10 @@ 
 #define CCI_MN_DVM_DOMAIN_CTL		0x200
 #define CCI_MN_DVM_DOMAIN_CTL_SET	0x210
 
+/* Supplemental Configuration */
+#define SCFG_BASE		0x01fc0000
+#define SCFG_USB3PRM1CR			0x000
+
 #ifdef CONFIG_LS2085A
 #define CONFIG_MAX_CPUS				16
 #define CONFIG_SYS_FSL_IFC_BANK_COUNT		8
@@ -138,6 +142,7 @@ 
 #define CONFIG_SYS_FSL_ERRATUM_A008511
 #define CONFIG_SYS_FSL_ERRATUM_A008514
 #define CONFIG_SYS_FSL_ERRATUM_A008585
+#define CONFIG_SYS_FSL_ERRATUM_A008751
 #endif
 
 #endif /* _ASM_ARMV8_FSL_LSCH3_CONFIG_ */