[U-Boot] [PATCH 05/14] armv8: Add workaround for USB erratum A-009798

yinbo.zhu yinbo.zhu at nxp.com
Wed May 17 11:06:34 UTC 2017


From: Suresh Gupta <suresh.gupta at freescale.com>

USB High Speed Squelch Threshold Adjustment
This patch is adding the erratum for LS1043 and LS2080 SoCs.

Signed-off-by: Sriram Dash <sriram.dash at nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat at nxp.com>
Signed-off-by: yinbo.zhu <yinbo.zhu at nxp.com>
---
 arch/arm/cpu/armv8/fsl-layerscape/Kconfig          |  5 +++++
 arch/arm/cpu/armv8/fsl-layerscape/soc.c            | 22 ++++++++++++++++++++++
 .../include/asm/arch-fsl-layerscape/immap_lsch2.h  |  5 +++++
 .../include/asm/arch-fsl-layerscape/immap_lsch3.h  |  2 ++
 4 files changed, 34 insertions(+)

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
index 4b87dd2..aff66fb 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
+++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -5,6 +5,7 @@ config ARCH_LS1012A
 	select SYS_FSL_DDR_BE
 	select SYS_FSL_MMDC
 	select SYS_FSL_ERRATUM_A010315
+	select SYS_FSL_ERRATUM_A009798
 	select ARCH_EARLY_INIT_R
 	select BOARD_EARLY_INIT_F
 	select SYS_FSL_HAS_CCI400
@@ -18,6 +19,7 @@ config ARCH_LS1043A
 	select SYS_FSL_DDR_VER_50
 	select SYS_FSL_ERRATUM_A008850
 	select SYS_FSL_ERRATUM_A009660
+	select SYS_FSL_ERRATUM_A009798
 	select SYS_FSL_ERRATUM_A009663
 	select SYS_FSL_ERRATUM_A009929
 	select SYS_FSL_ERRATUM_A009942
@@ -44,6 +46,7 @@ config ARCH_LS1046A
 	select SYS_FSL_ERRATUM_A009942
 	select SYS_FSL_ERRATUM_A010165
 	select SYS_FSL_ERRATUM_A010539
+	select SYS_FSL_ERRATUM_A009798
 	select SYS_FSL_HAS_DDR4
 	select SYS_FSL_SRDS_2
 	select ARCH_EARLY_INIT_R
@@ -71,6 +74,7 @@ config ARCH_LS1088A
 	select SYS_FSL_ERRATUM_A010165
 	select SYS_FSL_ERRATUM_A008511
 	select SYS_FSL_ERRATUM_A008850
+	select SYS_FSL_ERRATUM_A009798
 	select ARCH_EARLY_INIT_R
 	select BOARD_EARLY_INIT_F
 	select SYS_FSL_EC1
@@ -101,6 +105,7 @@ config ARCH_LS2080A
 	select SYS_FSL_ERRATUM_A008514
 	select SYS_FSL_ERRATUM_A008585
 	select SYS_FSL_ERRATUM_A009635
+	select SYS_FSL_ERRATUM_A009798
 	select SYS_FSL_ERRATUM_A009663
 	select SYS_FSL_ERRATUM_A009801
 	select SYS_FSL_ERRATUM_A009803
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
index 1544eaa..8d0f1b8 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
@@ -28,6 +28,25 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+static void erratum_a009798(void)
+{
+#ifdef CONFIG_SYS_FSL_ERRATUM_A009798
+#if defined(CONFIG_LS1043A) || defined(CONFIG_LS1046A)
+u32 __iomem *scfg = (u32 __iomem *)SCFG_BASE;
+u32 val = scfg_in32(scfg + SCFG_USB3PRM1CR_USB1 / 4);
+scfg_out32(scfg + SCFG_USB3PRM1CR_USB1 / 4 , val & USB_SQRXTUNE);
+val = gur_in32(scfg + SCFG_USB3PRM1CR_USB2 / 4);
+scfg_out32(scfg + SCFG_USB3PRM1CR_USB2 / 4 , val & USB_SQRXTUNE);
+val = scfg_in32(scfg + SCFG_USB3PRM1CR_USB3 / 4);
+scfg_out32(scfg + SCFG_USB3PRM1CR_USB3 / 4 , val & USB_SQRXTUNE);
+#elif defined(CONFIG_LS2080A) || defined(CONFIG_LS2085A)
+u32 __iomem *scfg = (u32 __iomem *)SCFG_BASE;
+u32 val = scfg_in32(scfg + SCFG_USB3PRM1CR / 4);
+scfg_out32(scfg + SCFG_USB3PRM1CR / 4, val & USB_SQRXTUNE);
+#endif
+#endif /* CONFIG_SYS_FSL_ERRATUM_A009798 */
+}
+
 bool soc_has_dp_ddr(void)
 {
 	struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
@@ -200,6 +219,8 @@ void fsl_lsch3_early_init_f(void)
 #endif
 	erratum_a008514();
 	erratum_a008336();
+	erratum_a009008();
+	erratum_a009798();
 #ifdef CONFIG_CHAIN_OF_TRUST
 	/* In case of Secure Boot, the IBR configures the SMMU
 	* to allow only Secure transactions.
@@ -471,6 +492,7 @@ void fsl_lsch2_early_init_f(void)
 	erratum_a009929();
 	erratum_a009660();
 	erratum_a010539();
+	erratum_a009798();
 }
 #endif
 
diff --git a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
index 5210b8c..5763586 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
@@ -198,6 +198,11 @@ struct ccsr_gur {
 #define FSL_CHASSIS2_DEVDISR2_10GEC1_2	0x00400000
 #define FSL_CHASSIS2_DEVDISR2_10GEC1_3	0x80000000
 #define FSL_CHASSIS2_DEVDISR2_10GEC1_4	0x40000000
+#define SCFG_USB3PRM1CR_USB2           0x07C
+#define SCFG_USB3PRM1CR_USB3           0x088
+#define USB_TXVREFTUNE                 0x9
+#define USB_SQRXTUNE                   0xFC7FFFFF
+
 	u32     devdisr2;       /* Device disable control 2 */
 	u32     devdisr3;       /* Device disable control 3 */
 	u32     devdisr4;       /* Device disable control 4 */
diff --git a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
index f5e8adb..5e458ae 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch3.h
@@ -140,6 +140,8 @@
 #define SCFG_BASE		0x01fc0000
 #define SCFG_USB3PRM1CR			0x000
 #define SCFG_USB3PRM1CR_INIT		0x27672b2a
+#define USB_TXVREFTUNE                 0x9
+#define USB_SQRXTUNE                   0xFC7FFFFF
 #define SCFG_QSPICLKCTLR	0x10
 
 #define TP_ITYP_AV		0x00000001	/* Initiator available */
-- 
2.1.0.27.g96db324



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