powerpc/85xx: Add workaround for errata USB-14 (enable on P204x/P3041/P50x0)

On P204x/P304x/P50x0 Rev1.0, USB transmit will result in false internal
multi-bit ECC errors, which has impact on performance, so software should
disable all ECC reporting from USB1 and USB2.

In formal release document, the errata number should be USB14 instead of USB138.

Signed-off-by: xulei <Lei.Xu@freescale.com>
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: xulei <B33228@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

arch/powerpc/cpu/mpc85xx/cmd_errata.c

@@ -254,6 +254,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 #endif
 #ifdef CONFIG_SYS_P4080_ERRATUM_PCIE_A003
 	puts("Work-around for Erratum PCIe-A003 enabled\n");
+#endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_USB14
+	puts("Work-around for Erratum USB14 enabled\n");
 #endif
 	return 0;
 }

arch/powerpc/cpu/mpc85xx/cpu_init.c

@@ -623,6 +623,20 @@ skip_l2:
 	}
 #endif
 
+#ifdef CONFIG_SYS_FSL_ERRATUM_USB14
+	/* On P204x/P304x/P50x0 Rev1.0, USB transmit will result internal
+	 * multi-bit ECC errors which has impact on performance, so software
+	 * should disable all ECC reporting from USB1 and USB2.
+	 */
+	if (IS_SVR_REV(get_svr(), 1, 0)) {
+		struct dcsr_dcfg_regs *dcfg = (struct dcsr_dcfg_regs *)
+			(CONFIG_SYS_DCSRBAR + CONFIG_SYS_DCSR_DCFG_OFFSET);
+		setbits_be32(&dcfg->ecccr1,
+				(DCSR_DCFG_ECC_DISABLE_USB1 |
+				 DCSR_DCFG_ECC_DISABLE_USB2));
+	}
+#endif
+
 #ifdef CONFIG_FMAN_ENET
 	fman_enet_init();
 #endif

arch/powerpc/include/asm/config_mpc85xx.h

@@ -333,6 +333,7 @@
 #define CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
 #define CONFIG_SYS_FSL_ERRATUM_ESDHC111
 #define CONFIG_SYS_FSL_ERRATUM_NMG_CPU_A011
+#define CONFIG_SYS_FSL_ERRATUM_USB14
 #define CONFIG_SYS_FSL_ERRATUM_CPU_A003999
 #define CONFIG_SYS_FSL_ERRATUM_DDR_A003474
 #define CONFIG_SYS_FSL_SRIO_PCIE_BOOT_MASTER
@@ -365,6 +366,7 @@
 #define CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
 #define CONFIG_SYS_FSL_ERRATUM_ESDHC111
 #define CONFIG_SYS_FSL_ERRATUM_NMG_CPU_A011
+#define CONFIG_SYS_FSL_ERRATUM_USB14
 #define CONFIG_SYS_FSL_ERRATUM_CPU_A003999
 #define CONFIG_SYS_FSL_ERRATUM_DDR_A003474
 #define CONFIG_SYS_FSL_SRIO_PCIE_BOOT_MASTER
@@ -442,6 +444,7 @@
 #define CONFIG_SYS_FSL_USB2_PHY_ENABLE
 #define CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
 #define CONFIG_SYS_FSL_ERRATUM_ESDHC111
+#define CONFIG_SYS_FSL_ERRATUM_USB14
 #define CONFIG_SYS_FSL_ERRATUM_DDR_A003474
 #define CONFIG_SYS_FSL_SRIO_PCIE_BOOT_MASTER
 #define CONFIG_SYS_FSL_SRIO_MAX_PORTS	2
@@ -473,7 +476,7 @@
 #define CONFIG_SYS_FSL_USB2_PHY_ENABLE
 #define CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
 #define CONFIG_SYS_FSL_ERRATUM_ESDHC111
-#define CONFIG_SYS_FSL_ERRATUM_USB138
+#define CONFIG_SYS_FSL_ERRATUM_USB14
 #define CONFIG_SYS_FSL_ERRATUM_DDR_A003
 #define CONFIG_SYS_FSL_ERRATUM_DDR_A003474
 #define CONFIG_SYS_FSL_ERRATUM_A004699

arch/powerpc/include/asm/immap_85xx.h

@@ -3161,4 +3161,13 @@ struct ccsr_cluster_l2 {
 #define CONFIG_SYS_FSL_CLUSTER_1_L2 \
 	(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_CLUSTER_1_L2_OFFSET)
 #endif /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */
+
+#define	CONFIG_SYS_DCSR_DCFG_OFFSET	0X20000
+struct dcsr_dcfg_regs {
+	u8  res_0[0x520];
+	u32 ecccr1;
+#define	DCSR_DCFG_ECC_DISABLE_USB1	0x00008000
+#define	DCSR_DCFG_ECC_DISABLE_USB2	0x00004000
+	u8  res_524[0x1000 - 0x524]; /* 0x524 - 0x1000 */
+};
 #endif /*__IMMAP_85xx__*/