diff options
| author | Timur Tabi <timur@freescale.com> | 2011-04-01 13:19:36 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2011-04-28 22:09:23 -0500 |
| commit | da30b9fd97f031a6b6863359f3d4c6633e5c7035 (patch) | |
| tree | 8193ca2746ebc44306440f5e203f954e95d88586 /arch/powerpc/cpu | |
| parent | 82c9dfdc20b1bf86e732e61e7230cfa7c933247f (diff) | |
powerpc/85xx: Implement work-around for P4080 erratum SERDES-A005
SerDes PLL bandwidth default setting is incorrect when no lanes are
configured as PCI Express.
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/cpu')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cmd_errata.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c | 48 |
2 files changed, 51 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index 05648169ad..7b9f77362c 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -47,6 +47,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) #if defined(CONFIG_SYS_P4080_ERRATUM_SERDES9) puts("Work-around for Erratum SERDES9 enabled\n"); #endif +#if defined(CONFIG_SYS_P4080_ERRATUM_SERDES_A005) + puts("Work-around for Erratum SERDES-A005 enabled\n"); +#endif #if defined(CONFIG_SYS_P4080_ERRATUM_CPU22) puts("Work-around for Erratum CPU22 enabled\n"); #endif diff --git a/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c b/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c index d39f96352e..edacdb813f 100644 --- a/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c +++ b/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c @@ -386,6 +386,52 @@ static void p4080_erratum_serdes8(serdes_corenet_t *regs, ccsr_gur_t *gur, } #endif +#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES_A005 +/* + * If PCIe is not selected as a protocol for any lanes driven by a given PLL, + * that PLL should have SRDSBnPLLCR1[PLLBW_SEL] = 0. + */ +static void p4080_erratum_serdes_a005(serdes_corenet_t *regs, unsigned int cfg) +{ + enum srds_prtcl device; + + switch (cfg) { + case 0x13: + case 0x16: + /* + * If SRDS_PRTCL = 0x13 or 0x16, set SRDSB1PLLCR1[PLLBW_SEL] + * to 0. + */ + clrbits_be32(®s->bank[FSL_SRDS_BANK_1].pllcr1, + SRDS_PLLCR1_PLL_BWSEL); + break; + case 0x19: + /* + * If SRDS_PRTCL = 0x19, set SRDSB1PLLCR1[PLLBW_SEL] to 0 and + * SRDSB3PLLCR1[PLLBW_SEL] to 1. + */ + clrbits_be32(®s->bank[FSL_SRDS_BANK_1].pllcr1, + SRDS_PLLCR1_PLL_BWSEL); + setbits_be32(®s->bank[FSL_SRDS_BANK_3].pllcr1, + SRDS_PLLCR1_PLL_BWSEL); + break; + } + + /* + * Set SRDSBnPLLCR1[PLLBW_SEL] to 0 for each bank that selects XAUI + * before XAUI is initialized. + */ + for (device = XAUI_FM1; device <= XAUI_FM2; device++) { + if (is_serdes_configured(device)) { + int bank = serdes_get_bank_by_device(cfg, device); + + clrbits_be32(®s->bank[bank].pllcr1, + SRDS_PLLCR1_PLL_BWSEL); + } + } +} +#endif + void fsl_serdes_init(void) { ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); @@ -570,6 +616,8 @@ void fsl_serdes_init(void) puts("\n"); #endif +#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES_A005 + p4080_erratum_serdes_a005(srds_regs, cfg); #endif for (idx = 0; idx < SRDS_MAX_BANK; idx++) { |