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 --- Change for v3: * split DDR and UART bugfixes to separate patch series (series 1/3) Change for v2: * fix checkpatch warnings --- arch/arm/cpu/arm926ejs/davinci/da850_lowlevel.c | 26 +++++++++++++++++------ 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 df7d6a2..ff2e2e3 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 b145c6e..56e5743 100644 --- a/arch/arm/include/asm/arch-davinci/hardware.h +++ b/arch/arm/include/asm/arch-davinci/hardware.h @@ -505,6 +505,7 @@ 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)