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am33xx: support board specific ddr settings

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Move the hardcoded ddr2/ddr3 settings for the ti boards to board code,
so other boards can use different types/timings.

Signed-off-by: Peter Korsgaard <peter.korsgaard@barco.com>
[trini: Make apply with rtc32k_enable() in the file]
Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Peter Korsgaard 2012-10-18 01:21:12 +00:00 committed by Tom Rini
parent 7f26a5a26f
commit c00f69dbcd
3 changed files with 93 additions and 117 deletions
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114
arch/arm/cpu/armv7/am33xx/emif4.c
View File

@ -47,78 +47,6 @@ void dram_init_banksize(void)
static struct vtp_reg *vtpreg = (struct vtp_reg *)VTP0_CTRL_ADDR;
static struct ddr_ctrl *ddrctrl = (struct ddr_ctrl *)DDR_CTRL_ADDR;
static const struct ddr_data ddr2_data = {
.datardsratio0 = ((DDR2_RD_DQS<<30)|(DDR2_RD_DQS<<20)
|(DDR2_RD_DQS<<10)|(DDR2_RD_DQS<<0)),
.datawdsratio0 = ((DDR2_WR_DQS<<30)|(DDR2_WR_DQS<<20)
|(DDR2_WR_DQS<<10)|(DDR2_WR_DQS<<0)),
.datawiratio0 = ((DDR2_PHY_WRLVL<<30)|(DDR2_PHY_WRLVL<<20)
|(DDR2_PHY_WRLVL<<10)|(DDR2_PHY_WRLVL<<0)),
.datagiratio0 = ((DDR2_PHY_GATELVL<<30)|(DDR2_PHY_GATELVL<<20)
|(DDR2_PHY_GATELVL<<10)|(DDR2_PHY_GATELVL<<0)),
.datafwsratio0 = ((DDR2_PHY_FIFO_WE<<30)|(DDR2_PHY_FIFO_WE<<20)
|(DDR2_PHY_FIFO_WE<<10)|(DDR2_PHY_FIFO_WE<<0)),
.datawrsratio0 = ((DDR2_PHY_WR_DATA<<30)|(DDR2_PHY_WR_DATA<<20)
|(DDR2_PHY_WR_DATA<<10)|(DDR2_PHY_WR_DATA<<0)),
.datauserank0delay = DDR2_PHY_RANK0_DELAY,
.datadldiff0 = PHY_DLL_LOCK_DIFF,
};
static const struct cmd_control ddr2_cmd_ctrl_data = {
.cmd0csratio = DDR2_RATIO,
.cmd0dldiff = DDR2_DLL_LOCK_DIFF,
.cmd0iclkout = DDR2_INVERT_CLKOUT,
.cmd1csratio = DDR2_RATIO,
.cmd1dldiff = DDR2_DLL_LOCK_DIFF,
.cmd1iclkout = DDR2_INVERT_CLKOUT,
.cmd2csratio = DDR2_RATIO,
.cmd2dldiff = DDR2_DLL_LOCK_DIFF,
.cmd2iclkout = DDR2_INVERT_CLKOUT,
};
static const struct emif_regs ddr2_emif_reg_data = {
.sdram_config = DDR2_EMIF_SDCFG,
.ref_ctrl = DDR2_EMIF_SDREF,
.sdram_tim1 = DDR2_EMIF_TIM1,
.sdram_tim2 = DDR2_EMIF_TIM2,
.sdram_tim3 = DDR2_EMIF_TIM3,
.emif_ddr_phy_ctlr_1 = DDR2_EMIF_READ_LATENCY,
};
static const struct ddr_data ddr3_data = {
.datardsratio0 = DDR3_RD_DQS,
.datawdsratio0 = DDR3_WR_DQS,
.datafwsratio0 = DDR3_PHY_FIFO_WE,
.datawrsratio0 = DDR3_PHY_WR_DATA,
.datadldiff0 = PHY_DLL_LOCK_DIFF,
};
static const struct cmd_control ddr3_cmd_ctrl_data = {
.cmd0csratio = DDR3_RATIO,
.cmd0dldiff = DDR3_DLL_LOCK_DIFF,
.cmd0iclkout = DDR3_INVERT_CLKOUT,
.cmd1csratio = DDR3_RATIO,
.cmd1dldiff = DDR3_DLL_LOCK_DIFF,
.cmd1iclkout = DDR3_INVERT_CLKOUT,
.cmd2csratio = DDR3_RATIO,
.cmd2dldiff = DDR3_DLL_LOCK_DIFF,
.cmd2iclkout = DDR3_INVERT_CLKOUT,
};
static struct emif_regs ddr3_emif_reg_data = {
.sdram_config = DDR3_EMIF_SDCFG,
.ref_ctrl = DDR3_EMIF_SDREF,
.sdram_tim1 = DDR3_EMIF_TIM1,
.sdram_tim2 = DDR3_EMIF_TIM2,
.sdram_tim3 = DDR3_EMIF_TIM3,
.zq_config = DDR3_ZQ_CFG,
.emif_ddr_phy_ctlr_1 = DDR3_EMIF_READ_LATENCY,
};
static void config_vtp(void)
{
writel(readl(&vtpreg->vtp0ctrlreg) | VTP_CTRL_ENABLE,
@ -134,46 +62,26 @@ static void config_vtp(void)
;
}
void config_ddr(short ddr_type)
void config_ddr(unsigned int pll, unsigned int ioctrl,
const struct ddr_data *data, const struct cmd_control *ctrl,
const struct emif_regs *regs)
{
int ddr_pll, ioctrl_val;
const struct emif_regs *emif_regs;
const struct ddr_data *ddr_data;
const struct cmd_control *cmd_ctrl_data;
if (ddr_type == EMIF_REG_SDRAM_TYPE_DDR2) {
ddr_pll = 266;
cmd_ctrl_data = &ddr2_cmd_ctrl_data;
ddr_data = &ddr2_data;
ioctrl_val = DDR2_IOCTRL_VALUE;
emif_regs = &ddr2_emif_reg_data;
} else if (ddr_type == EMIF_REG_SDRAM_TYPE_DDR3) {
ddr_pll = 303;
cmd_ctrl_data = &ddr3_cmd_ctrl_data;
ddr_data = &ddr3_data;
ioctrl_val = DDR3_IOCTRL_VALUE;
emif_regs = &ddr3_emif_reg_data;
} else {
puts("Unknown memory type");
hang();
}
enable_emif_clocks();
ddr_pll_config(ddr_pll);
ddr_pll_config(pll);
config_vtp();
config_cmd_ctrl(cmd_ctrl_data);
config_cmd_ctrl(ctrl);
config_ddr_data(0, ddr_data);
config_ddr_data(1, ddr_data);
config_ddr_data(0, data);
config_ddr_data(1, data);
config_io_ctrl(ioctrl_val);
config_io_ctrl(ioctrl);
/* Set CKE to be controlled by EMIF/DDR PHY */
writel(DDR_CKE_CTRL_NORMAL, &ddrctrl->ddrckectrl);
/* Program EMIF instance */
config_ddr_phy(emif_regs);
set_sdram_timings(emif_regs);
config_sdram(emif_regs);
config_ddr_phy(regs);
set_sdram_timings(regs);
config_sdram(regs);
}
#endif

5
arch/arm/include/asm/arch-am33xx/ddr_defs.h
View File

@ -29,6 +29,7 @@
#define PHY_DLL_LOCK_DIFF 0x0
#define DDR_CKE_CTRL_NORMAL 0x1
/* Micron MT47H128M16RT-25E */
#define DDR2_EMIF_READ_LATENCY 0x100005 /* Enable Dynamic Power Down */
#define DDR2_EMIF_TIM1 0x0666B3C9
#define DDR2_EMIF_TIM2 0x243631CA
@ -189,6 +190,8 @@ struct ddr_ctrl {
unsigned int ddrckectrl;
};
void config_ddr(short ddr_type);
void config_ddr(unsigned int pll, unsigned int ioctrl,
const struct ddr_data *data, const struct cmd_control *ctrl,
const struct emif_regs *regs);
#endif /* _DDR_DEFS_H */

91
board/ti/am335x/board.c
View File

@ -131,20 +131,80 @@ static void rtc32k_enable(void)
/* Enable the RTC 32K OSC by setting bits 3 and 6. */
writel((1 << 3) | (1 << 6), &rtc->osc);
}
static const struct ddr_data ddr2_data = {
.datardsratio0 = ((DDR2_RD_DQS<<30)|(DDR2_RD_DQS<<20)
|(DDR2_RD_DQS<<10)|(DDR2_RD_DQS<<0)),
.datawdsratio0 = ((DDR2_WR_DQS<<30)|(DDR2_WR_DQS<<20)
|(DDR2_WR_DQS<<10)|(DDR2_WR_DQS<<0)),
.datawiratio0 = ((DDR2_PHY_WRLVL<<30)|(DDR2_PHY_WRLVL<<20)
|(DDR2_PHY_WRLVL<<10)|(DDR2_PHY_WRLVL<<0)),
.datagiratio0 = ((DDR2_PHY_GATELVL<<30)|(DDR2_PHY_GATELVL<<20)
|(DDR2_PHY_GATELVL<<10)|(DDR2_PHY_GATELVL<<0)),
.datafwsratio0 = ((DDR2_PHY_FIFO_WE<<30)|(DDR2_PHY_FIFO_WE<<20)
|(DDR2_PHY_FIFO_WE<<10)|(DDR2_PHY_FIFO_WE<<0)),
.datawrsratio0 = ((DDR2_PHY_WR_DATA<<30)|(DDR2_PHY_WR_DATA<<20)
|(DDR2_PHY_WR_DATA<<10)|(DDR2_PHY_WR_DATA<<0)),
.datauserank0delay = DDR2_PHY_RANK0_DELAY,
.datadldiff0 = PHY_DLL_LOCK_DIFF,
};
static const struct cmd_control ddr2_cmd_ctrl_data = {
.cmd0csratio = DDR2_RATIO,
.cmd0dldiff = DDR2_DLL_LOCK_DIFF,
.cmd0iclkout = DDR2_INVERT_CLKOUT,
.cmd1csratio = DDR2_RATIO,
.cmd1dldiff = DDR2_DLL_LOCK_DIFF,
.cmd1iclkout = DDR2_INVERT_CLKOUT,
.cmd2csratio = DDR2_RATIO,
.cmd2dldiff = DDR2_DLL_LOCK_DIFF,
.cmd2iclkout = DDR2_INVERT_CLKOUT,
};
static const struct emif_regs ddr2_emif_reg_data = {
.sdram_config = DDR2_EMIF_SDCFG,
.ref_ctrl = DDR2_EMIF_SDREF,
.sdram_tim1 = DDR2_EMIF_TIM1,
.sdram_tim2 = DDR2_EMIF_TIM2,
.sdram_tim3 = DDR2_EMIF_TIM3,
.emif_ddr_phy_ctlr_1 = DDR2_EMIF_READ_LATENCY,
};
static const struct ddr_data ddr3_data = {
.datardsratio0 = DDR3_RD_DQS,
.datawdsratio0 = DDR3_WR_DQS,
.datafwsratio0 = DDR3_PHY_FIFO_WE,
.datawrsratio0 = DDR3_PHY_WR_DATA,
.datadldiff0 = PHY_DLL_LOCK_DIFF,
};
static const struct cmd_control ddr3_cmd_ctrl_data = {
.cmd0csratio = DDR3_RATIO,
.cmd0dldiff = DDR3_DLL_LOCK_DIFF,
.cmd0iclkout = DDR3_INVERT_CLKOUT,
.cmd1csratio = DDR3_RATIO,
.cmd1dldiff = DDR3_DLL_LOCK_DIFF,
.cmd1iclkout = DDR3_INVERT_CLKOUT,
.cmd2csratio = DDR3_RATIO,
.cmd2dldiff = DDR3_DLL_LOCK_DIFF,
.cmd2iclkout = DDR3_INVERT_CLKOUT,
};
static struct emif_regs ddr3_emif_reg_data = {
.sdram_config = DDR3_EMIF_SDCFG,
.ref_ctrl = DDR3_EMIF_SDREF,
.sdram_tim1 = DDR3_EMIF_TIM1,
.sdram_tim2 = DDR3_EMIF_TIM2,
.sdram_tim3 = DDR3_EMIF_TIM3,
.zq_config = DDR3_ZQ_CFG,
.emif_ddr_phy_ctlr_1 = DDR3_EMIF_READ_LATENCY,
};
#endif
/*
* Determine what type of DDR we have.
*/
static short inline board_memory_type(void)
{
/* The following boards are known to use DDR3. */
if (board_is_evm_sk() || board_is_bone_lt())
return EMIF_REG_SDRAM_TYPE_DDR3;
return EMIF_REG_SDRAM_TYPE_DDR2;
}
/*
* early system init of muxing and clocks.
*/
@ -204,7 +264,12 @@ void s_init(void)
gpio_direction_output(GPIO_DDR_VTT_EN, 1);
}
config_ddr(board_memory_type());
if (board_is_evm_sk() || board_is_bone_lt())
config_ddr(303, DDR3_IOCTRL_VALUE, &ddr3_data,
&ddr3_cmd_ctrl_data, &ddr3_emif_reg_data);
else
config_ddr(266, DDR2_IOCTRL_VALUE, &ddr2_data,
&ddr2_cmd_ctrl_data, &ddr2_emif_reg_data);
#endif
}