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

York Sun
2015-03-19T16:45:40Z

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(+)

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_ */
--
1.7.9.5