diff options
| author | Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com> | 2012-07-09 08:52:41 +0000 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-09-01 14:58:10 +0200 |
| commit | 89473d233f0d8ef74c6aac37fe3258ef3d3efc06 (patch) | |
| tree | c798a414e8c103be95166def21606b5179f44c17 /arch | |
| parent | c50afc1dab78a1a72bc37b60d97864e56b52cc5c (diff) | |
arm/davinci: fix DDR2/mDDR memory controller initialization for Omap L138
follow section 15.2.13.1 (Initializing Following Device Power Up or Reset) of
OMAP-L138 DSP+ARM Processor Technical Reference Manual
Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com>
Acked-by: Christian Riesch <christian.riesch@omicron.at>
Tested-by: Christian Riesch <christian.riesch@omicron.at>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c | 26 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-davinci/hardware.h | 1 |
2 files changed, 20 insertions, 7 deletions
diff --git a/arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c b/arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c index df7d6a24ba..ff2e2e33df 100644 --- a/arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c +++ b/arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c @@ -190,13 +190,21 @@ int da850_ddr_setup(void) setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_LOCK); setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_POWERDWN); - - setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_IOPWRDWN); } - + setbits_le32(&davinci_syscfg1_regs->vtpio_ctl, VTP_IOPWRDWN); writel(CONFIG_SYS_DA850_DDR2_DDRPHYCR, &dv_ddr2_regs_ctrl->ddrphycr); - clrbits_le32(&davinci_syscfg1_regs->ddr_slew, - (1 << DDR_SLEW_CMOSEN_BIT)); + + if (CONFIG_SYS_DA850_DDR2_SDBCR & (1 << DV_DDR_SDCR_DDR2EN_SHIFT)) { + /* DDR2 */ + clrbits_le32(&davinci_syscfg1_regs->ddr_slew, + (1 << DDR_SLEW_DDR_PDENA_BIT) | + (1 << DDR_SLEW_CMOSEN_BIT)); + } else { + /* MOBILE DDR */ + setbits_le32(&davinci_syscfg1_regs->ddr_slew, + (1 << DDR_SLEW_DDR_PDENA_BIT) | + (1 << DDR_SLEW_CMOSEN_BIT)); + } /* * SDRAM Configuration Register (SDCR): @@ -216,7 +224,11 @@ int da850_ddr_setup(void) writel(tmp, &dv_ddr2_regs_ctrl->sdbcr); /* write memory configuration and timing */ - writel(CONFIG_SYS_DA850_DDR2_SDBCR2, &dv_ddr2_regs_ctrl->sdbcr2); + if (!(CONFIG_SYS_DA850_DDR2_SDBCR & (1 << DV_DDR_SDCR_DDR2EN_SHIFT))) { + /* MOBILE DDR only*/ + writel(CONFIG_SYS_DA850_DDR2_SDBCR2, + &dv_ddr2_regs_ctrl->sdbcr2); + } writel(CONFIG_SYS_DA850_DDR2_SDTIMR, &dv_ddr2_regs_ctrl->sdtimr); writel(CONFIG_SYS_DA850_DDR2_SDTIMR2, &dv_ddr2_regs_ctrl->sdtimr2); @@ -240,7 +252,7 @@ int da850_ddr_setup(void) /* disable self refresh */ clrbits_le32(&dv_ddr2_regs_ctrl->sdrcr, - DV_DDR_SDRCR_LPMODEN | DV_DDR_SDRCR_LPMODEN); + DV_DDR_SDRCR_LPMODEN | DV_DDR_SDRCR_MCLKSTOPEN); writel(CONFIG_SYS_DA850_DDR2_PBBPR, &dv_ddr2_regs_ctrl->pbbpr); return 0; diff --git a/arch/arm/include/asm/arch-davinci/hardware.h b/arch/arm/include/asm/arch-davinci/hardware.h index f6b7a2caef..acb0fe2339 100644 --- a/arch/arm/include/asm/arch-davinci/hardware.h +++ b/arch/arm/include/asm/arch-davinci/hardware.h @@ -506,6 +506,7 @@ struct davinci_syscfg1_regs { ((struct davinci_syscfg1_regs *)DAVINCI_SYSCFG1_BASE) #define DDR_SLEW_CMOSEN_BIT 4 +#define DDR_SLEW_DDR_PDENA_BIT 5 #define VTP_POWERDWN (1 << 6) #define VTP_LOCK (1 << 7) |