diff options
| author | Xulei <B33228@freescale.com> | 2013-03-11 17:56:34 +0000 |
|---|---|---|
| committer | Andy Fleming <afleming@freescale.com> | 2013-05-02 16:56:44 -0500 |
| commit | 99d7b0a43ddec619739f38dc6a92777a4595182c (patch) | |
| tree | e99b9173294e59e451c70d258595d88156967bfd /arch/powerpc/cpu | |
| parent | 57966101c827fcfa215aedee59f0e5aa558b7604 (diff) | |
| download | blackbird-obmc-uboot-99d7b0a43ddec619739f38dc6a92777a4595182c.tar.gz blackbird-obmc-uboot-99d7b0a43ddec619739f38dc6a92777a4595182c.zip | |
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.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cpu_init.c | 14 |
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 5d72f4c342..422782ca8f 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 de9d916111..53713e31d4 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 |
