diff options
Diffstat (limited to 'arch/powerpc/cpu/mpc85xx')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cmd_errata.c | 19 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/cpu_init.c | 69 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/speed.c | 7 |
3 files changed, 95 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c index ee063fd8e9..9d8acd0aa1 100644 --- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c +++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c @@ -113,6 +113,21 @@ static void check_erratum_a4580(uint32_t svr) } #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_A007212 +/* + * This workaround can be implemented in PBI, or by u-boot. + */ +static void check_erratum_a007212(void) +{ + u32 __iomem *plldgdcr = (void *)(CONFIG_SYS_DCSRBAR + 0x21c20); + + if (in_be32(plldgdcr) & 0x1fe) { + /* check if PLL ratio is set by workaround */ + puts("Work-around for Erratum A007212 enabled\n"); + } +} +#endif + static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { #ifdef CONFIG_SYS_FSL_ERRATUM_NMG_CPU_A011 @@ -281,6 +296,10 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) if (has_erratum_a006261()) puts("Work-around for Erratum A006261 enabled\n"); #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_A007212 + check_erratum_a007212(); +#endif + return 0; } diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c index 0a33e8dbc1..941c20e00a 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c @@ -280,6 +280,71 @@ static void corenet_tb_init(void) } #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_A007212 +void fsl_erratum_a007212_workaround(void) +{ + ccsr_gur_t __iomem *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); + u32 ddr_pll_ratio; + u32 __iomem *plldgdcr1 = (void *)(CONFIG_SYS_DCSRBAR + 0x21c20); + u32 __iomem *plldadcr1 = (void *)(CONFIG_SYS_DCSRBAR + 0x21c28); + u32 __iomem *dpdovrcr4 = (void *)(CONFIG_SYS_DCSRBAR + 0x21e80); +#if (CONFIG_NUM_DDR_CONTROLLERS >= 2) + u32 __iomem *plldgdcr2 = (void *)(CONFIG_SYS_DCSRBAR + 0x21c40); + u32 __iomem *plldadcr2 = (void *)(CONFIG_SYS_DCSRBAR + 0x21c48); +#if (CONFIG_NUM_DDR_CONTROLLERS >= 3) + u32 __iomem *plldgdcr3 = (void *)(CONFIG_SYS_DCSRBAR + 0x21c60); + u32 __iomem *plldadcr3 = (void *)(CONFIG_SYS_DCSRBAR + 0x21c68); +#endif +#endif + /* + * Even this workaround applies to selected version of SoCs, it is + * safe to apply to all versions, with the limitation of odd ratios. + * If RCW has disabled DDR PLL, we have to apply this workaround, + * otherwise DDR will not work. + */ + ddr_pll_ratio = (in_be32(&gur->rcwsr[0]) >> + FSL_CORENET_RCWSR0_MEM_PLL_RAT_SHIFT) & + FSL_CORENET_RCWSR0_MEM_PLL_RAT_MASK; + /* check if RCW sets ratio to 0, required by this workaround */ + if (ddr_pll_ratio != 0) + return; + ddr_pll_ratio = (in_be32(&gur->rcwsr[0]) >> + FSL_CORENET_RCWSR0_MEM_PLL_RAT_RESV_SHIFT) & + FSL_CORENET_RCWSR0_MEM_PLL_RAT_MASK; + /* check if reserved bits have the desired ratio */ + if (ddr_pll_ratio == 0) { + printf("Error: Unknown DDR PLL ratio!\n"); + return; + } + ddr_pll_ratio >>= 1; + + setbits_be32(plldadcr1, 0x02000001); +#if (CONFIG_NUM_DDR_CONTROLLERS >= 2) + setbits_be32(plldadcr2, 0x02000001); +#if (CONFIG_NUM_DDR_CONTROLLERS >= 3) + setbits_be32(plldadcr3, 0x02000001); +#endif +#endif + setbits_be32(dpdovrcr4, 0xe0000000); + out_be32(plldgdcr1, 0x08000001 | (ddr_pll_ratio << 1)); +#if (CONFIG_NUM_DDR_CONTROLLERS >= 2) + out_be32(plldgdcr2, 0x08000001 | (ddr_pll_ratio << 1)); +#if (CONFIG_NUM_DDR_CONTROLLERS >= 3) + out_be32(plldgdcr3, 0x08000001 | (ddr_pll_ratio << 1)); +#endif +#endif + udelay(100); + clrbits_be32(plldadcr1, 0x02000001); +#if (CONFIG_NUM_DDR_CONTROLLERS >= 2) + clrbits_be32(plldadcr2, 0x02000001); +#if (CONFIG_NUM_DDR_CONTROLLERS >= 3) + clrbits_be32(plldadcr3, 0x02000001); +#endif +#endif + clrbits_be32(dpdovrcr4, 0xe0000000); +} +#endif + void cpu_init_f (void) { extern void m8560_cpm_reset (void); @@ -349,6 +414,10 @@ void cpu_init_f (void) in_be32(&gur->dcsrcr); #endif +#ifdef CONFIG_SYS_FSL_ERRATUM_A007212 + fsl_erratum_a007212_workaround(); +#endif + } /* Implement a dummy function for those platforms w/o SERDES */ diff --git a/arch/powerpc/cpu/mpc85xx/speed.c b/arch/powerpc/cpu/mpc85xx/speed.c index 488fd5ea76..35dfb0a9a9 100644 --- a/arch/powerpc/cpu/mpc85xx/speed.c +++ b/arch/powerpc/cpu/mpc85xx/speed.c @@ -107,6 +107,13 @@ void get_sys_info(sys_info_t *sys_info) mem_pll_rat = (in_be32(&gur->rcwsr[0]) >> FSL_CORENET_RCWSR0_MEM_PLL_RAT_SHIFT) & FSL_CORENET_RCWSR0_MEM_PLL_RAT_MASK; +#ifdef CONFIG_SYS_FSL_ERRATUM_A007212 + if (mem_pll_rat == 0) { + mem_pll_rat = (in_be32(&gur->rcwsr[0]) >> + FSL_CORENET_RCWSR0_MEM_PLL_RAT_RESV_SHIFT) & + FSL_CORENET_RCWSR0_MEM_PLL_RAT_MASK; + } +#endif /* T4240/T4160 Rev2.0 MEM_PLL_RAT uses a value which is half of * T4240/T4160 Rev1.0. eg. It's 12 in Rev1.0, however, for Rev2.0 * it uses 6. |