diff options
| -rw-r--r-- | arch/arm/include/asm/emif.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/am33xx/ddr.c | 4 | ||||
| -rw-r--r-- | board/ti/am335x/board.c | 15 | ||||
| -rw-r--r-- | board/ti/am335x/board.h | 13 |
4 files changed, 33 insertions, 0 deletions
diff --git a/arch/arm/include/asm/emif.h b/arch/arm/include/asm/emif.h index b00decec6d..9a46340deb 100644 --- a/arch/arm/include/asm/emif.h +++ b/arch/arm/include/asm/emif.h @@ -1171,6 +1171,7 @@ struct emif_regs { u32 sdram_tim1; u32 sdram_tim2; u32 sdram_tim3; + u32 ocp_config; u32 read_idle_ctrl; u32 zq_config; u32 temp_alert_config; diff --git a/arch/arm/mach-omap2/am33xx/ddr.c b/arch/arm/mach-omap2/am33xx/ddr.c index 6acf30c5db..690487e7c3 100644 --- a/arch/arm/mach-omap2/am33xx/ddr.c +++ b/arch/arm/mach-omap2/am33xx/ddr.c @@ -180,6 +180,10 @@ void config_sdram(const struct emif_regs *regs, int nr) writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl); writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw); writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config); + + /* Write REG_COS_COUNT_1, REG_COS_COUNT_2, and REG_PR_OLD_COUNT. */ + if (regs->ocp_config) + writel(regs->ocp_config, &emif_reg[nr]->emif_l3_config); } /** diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c index 111ed3556c..8eaf3e9a5c 100644 --- a/board/ti/am335x/board.c +++ b/board/ti/am335x/board.c @@ -109,6 +109,16 @@ static const struct emif_regs ddr2_emif_reg_data = { .emif_ddr_phy_ctlr_1 = MT47H128M16RT25E_EMIF_READ_LATENCY, }; +static const struct emif_regs ddr2_evm_emif_reg_data = { + .sdram_config = MT47H128M16RT25E_EMIF_SDCFG, + .ref_ctrl = MT47H128M16RT25E_EMIF_SDREF, + .sdram_tim1 = MT47H128M16RT25E_EMIF_TIM1, + .sdram_tim2 = MT47H128M16RT25E_EMIF_TIM2, + .sdram_tim3 = MT47H128M16RT25E_EMIF_TIM3, + .ocp_config = EMIF_OCP_CONFIG_AM335X_EVM, + .emif_ddr_phy_ctlr_1 = MT47H128M16RT25E_EMIF_READ_LATENCY, +}; + static const struct ddr_data ddr3_data = { .datardsratio0 = MT41J128MJT125_RD_DQS, .datawdsratio0 = MT41J128MJT125_WR_DQS, @@ -198,6 +208,7 @@ static struct emif_regs ddr3_beagleblack_emif_reg_data = { .sdram_tim1 = MT41K256M16HA125E_EMIF_TIM1, .sdram_tim2 = MT41K256M16HA125E_EMIF_TIM2, .sdram_tim3 = MT41K256M16HA125E_EMIF_TIM3, + .ocp_config = EMIF_OCP_CONFIG_BEAGLEBONE_BLACK, .zq_config = MT41K256M16HA125E_ZQ_CFG, .emif_ddr_phy_ctlr_1 = MT41K256M16HA125E_EMIF_READ_LATENCY, }; @@ -208,6 +219,7 @@ static struct emif_regs ddr3_evm_emif_reg_data = { .sdram_tim1 = MT41J512M8RH125_EMIF_TIM1, .sdram_tim2 = MT41J512M8RH125_EMIF_TIM2, .sdram_tim3 = MT41J512M8RH125_EMIF_TIM3, + .ocp_config = EMIF_OCP_CONFIG_AM335X_EVM, .zq_config = MT41J512M8RH125_ZQ_CFG, .emif_ddr_phy_ctlr_1 = MT41J512M8RH125_EMIF_READ_LATENCY | PHY_EN_DYN_PWRDN, @@ -486,6 +498,9 @@ void sdram_init(void) config_ddr(400, &ioregs_evmsk, &ddr3_icev2_data, &ddr3_icev2_cmd_ctrl_data, &ddr3_icev2_emif_reg_data, 0); + else if (board_is_gp_evm()) + config_ddr(266, &ioregs, &ddr2_data, + &ddr2_cmd_ctrl_data, &ddr2_evm_emif_reg_data, 0); else config_ddr(266, &ioregs, &ddr2_data, &ddr2_cmd_ctrl_data, &ddr2_emif_reg_data, 0); diff --git a/board/ti/am335x/board.h b/board/ti/am335x/board.h index 9776df7959..48c139a817 100644 --- a/board/ti/am335x/board.h +++ b/board/ti/am335x/board.h @@ -11,6 +11,19 @@ #ifndef _BOARD_H_ #define _BOARD_H_ +/** + * AM335X (EMIF_4D) EMIF REG_COS_COUNT_1, REG_COS_COUNT_2, and + * REG_PR_OLD_COUNT values to avoid LCDC DMA FIFO underflows and Frame + * Synchronization Lost errors. The values are the biggest that work + * reliably with offered video modes and the memory subsystem on the + * boards. These register have are briefly documented in "7.3.3.5.2 + * Command Starvation" section of AM335x TRM. The REG_COS_COUNT_1 and + * REG_COS_COUNT_2 do not have any effect on current versions of + * AM335x. + */ +#define EMIF_OCP_CONFIG_BEAGLEBONE_BLACK 0x00141414 +#define EMIF_OCP_CONFIG_AM335X_EVM 0x003d3d3d + static inline int board_is_bone(void) { return board_ti_is("A335BONE"); |