diff options
| author | Liu Gang <Gang.Liu@freescale.com> | 2012-09-28 21:26:19 +0000 |
|---|---|---|
| committer | Andy Fleming <afleming@freescale.com> | 2012-10-22 14:31:12 -0500 |
| commit | d59c5570495a2721f4361275df668193e5f411f9 (patch) | |
| tree | 6f20aaf1baaa778f896cbd18490833dd7b87b89a /arch/powerpc/cpu/mpc85xx/cmd_errata.c | |
| parent | 9c889ece32d41063dd8e66e0c45a8e8c0c297149 (diff) | |
powerpc/srio: Workaround for srio erratrm a004034
Erratum: A-004034
Affects: SRIO
Description: During port initialization, the SRIO port performs
lane synchronization (detecting valid symbols on a lane) and
lane alignment (coordinating multiple lanes to receive valid data
across lanes). Internal errors in lane synchronization and lane
alignment may cause failure to achieve link initialization at
the configured port width.
An SRIO port configured as a 4x port may see one of these scenarios:
1. One or more lanes fails to achieve lane synchronization.
Depending on which lanes fail, this may result in downtraining
from 4x to 1x on lane 0, 4x to 1x on lane R (redundant lane).
2. The link may fail to achieve lane alignment as a 4x, even
though all 4 lanes achieve lane synchronization, and downtrain
to a 1x. An SRIO port configured as a 1x port may fail to complete
port initialization (PnESCSR[PU] never deasserts) because of
scenario 1.
Impact: SRIO port may downtrain to 1x, or may fail to complete
link initialization. Once a port completes link initialization
successfully, it will operate normally.
Signed-off-by: Liu Gang <Gang.Liu@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
Diffstat (limited to 'arch/powerpc/cpu/mpc85xx/cmd_errata.c')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cmd_errata.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index 7e4cc03640..bc7e5e36e2 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -128,6 +128,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) #ifdef CONFIG_SYS_FSL_ERRATUM_A004510 puts("Work-around for Erratum A004510 enabled\n"); #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_SRIO_A004034 + puts("Work-around for Erratum SRIO-A004034 enabled\n"); +#endif return 0; } |