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authorXulei <B33228@freescale.com>2013-03-11 17:56:34 +0000
committerAndy Fleming <afleming@freescale.com>2013-05-02 16:56:44 -0500
commit99d7b0a43ddec619739f38dc6a92777a4595182c (patch)
treee99b9173294e59e451c70d258595d88156967bfd /arch/powerpc/cpu
parent57966101c827fcfa215aedee59f0e5aa558b7604 (diff)
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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>
Diffstat (limited to 'arch/powerpc/cpu')
-rw-r--r--arch/powerpc/cpu/mpc85xx/cmd_errata.c3
-rw-r--r--arch/powerpc/cpu/mpc85xx/cpu_init.c14
2 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
index 5d72f4c..422782c 100644
--- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c
+++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
@@ -255,6 +255,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
#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;
}
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c
index de9d916..53713e3 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu_init.c
+++ b/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