armv8/ls1043a: Implement workaround for PEX erratum A009929

Consecutive write transactions from core to PCI express outbound
path hangs after 25 to 30 transactions depending on core freq.
This erratum enable the mbist clock through COP register setting.

Signed-off-by: Mingkai Hu <Mingkai.Hu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
index 984eaf9..23d6b73 100644 (file)
--- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
@@ -197,6 +197,19 @@ int sata_init(void)
 }
 #endif
 
+static void erratum_a009929(void)
+{
+#ifdef CONFIG_SYS_FSL_ERRATUM_A009929
+       struct ccsr_gur *gur = (void *)CONFIG_SYS_FSL_GUTS_ADDR;
+       u32 __iomem *dcsr_cop_ccp = (void *)CONFIG_SYS_DCSR_COP_CCP_ADDR;
+       u32 rstrqmr1 = gur_in32(&gur->rstrqmr1);
+
+       rstrqmr1 |= 0x00000400;
+       gur_out32(&gur->rstrqmr1, rstrqmr1);
+       writel(0x01000000, dcsr_cop_ccp);
+#endif
+}
+
 void fsl_lsch2_early_init_f(void)
 {
        struct ccsr_cci400 *cci = (struct ccsr_cci400 *)CONFIG_SYS_CCI400_ADDR;
@@ -216,6 +229,9 @@ void fsl_lsch2_early_init_f(void)
         */
        out_le32(&cci->slave[4].snoop_ctrl,
                 CCI400_DVM_MESSAGE_REQ_EN | CCI400_SNOOP_REQ_EN);
+
+       /* Erratum */
+       erratum_a009929();
 }
 #endif
 

diff --git a/arch/arm/include/asm/arch-fsl-layerscape/config.h b/arch/arm/include/asm/arch-fsl-layerscape/config.h
index 6e5224e..49b113d 100644 (file)
--- a/arch/arm/include/asm/arch-fsl-layerscape/config.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/config.h
@@ -166,6 +166,7 @@
 #define GICD_BASE              0x01401000
 #define GICC_BASE              0x01402000
 
+#define CONFIG_SYS_FSL_ERRATUM_A009929
 #else
 #error SoC not defined
 #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 65a785c..21b803f 100644 (file)
--- a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
@@ -12,6 +12,7 @@
 #define CONFIG_SYS_IMMR                                0x01000000
 #define CONFIG_SYS_DCSRBAR                     0x20000000
 #define CONFIG_SYS_DCSR_DCFG_ADDR      (CONFIG_SYS_DCSRBAR + 0x00140000)
+#define CONFIG_SYS_DCSR_COP_CCP_ADDR   (CONFIG_SYS_DCSRBAR + 0x02008040)
 
 #define CONFIG_SYS_FSL_DDR_ADDR                        (CONFIG_SYS_IMMR + 0x00080000)
 #define CONFIG_SYS_CCI400_ADDR                 (CONFIG_SYS_IMMR + 0x00180000)