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/*
* DDR Configuration for AM33xx devices.
*
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <asm/arch/cpu.h>
#include <asm/arch/ddr_defs.h>
#include <asm/arch/sys_proto.h>
#include <asm/io.h>
#include <asm/emif.h>
/**
* Base address for EMIF instances
*/
static struct emif_reg_struct *emif_reg[2] = {
(struct emif_reg_struct *)EMIF4_0_CFG_BASE,
(struct emif_reg_struct *)EMIF4_1_CFG_BASE};
/**
* Base addresses for DDR PHY cmd/data regs
*/
static struct ddr_cmd_regs *ddr_cmd_reg[2] = {
(struct ddr_cmd_regs *)DDR_PHY_CMD_ADDR,
(struct ddr_cmd_regs *)DDR_PHY_CMD_ADDR2};
static struct ddr_data_regs *ddr_data_reg[2] = {
(struct ddr_data_regs *)DDR_PHY_DATA_ADDR,
(struct ddr_data_regs *)DDR_PHY_DATA_ADDR2};
/**
* Base address for ddr io control instances
*/
static struct ddr_cmdtctrl *ioctrl_reg = {
(struct ddr_cmdtctrl *)DDR_CONTROL_BASE_ADDR};
static inline u32 get_mr(int nr, u32 cs, u32 mr_addr)
{
u32 mr;
mr_addr |= cs << EMIF_REG_CS_SHIFT;
writel(mr_addr, &emif_reg[nr]->emif_lpddr2_mode_reg_cfg);
mr = readl(&emif_reg[nr]->emif_lpddr2_mode_reg_data);
debug("get_mr: EMIF1 cs %d mr %08x val 0x%x\n", cs, mr_addr, mr);
if (((mr & 0x0000ff00) >> 8) == (mr & 0xff) &&
((mr & 0x00ff0000) >> 16) == (mr & 0xff) &&
((mr & 0xff000000) >> 24) == (mr & 0xff))
return mr & 0xff;
else
return mr;
}
static inline void set_mr(int nr, u32 cs, u32 mr_addr, u32 mr_val)
{
mr_addr |= cs << EMIF_REG_CS_SHIFT;
writel(mr_addr, &emif_reg[nr]->emif_lpddr2_mode_reg_cfg);
writel(mr_val, &emif_reg[nr]->emif_lpddr2_mode_reg_data);
}
static void configure_mr(int nr, u32 cs)
{
u32 mr_addr;
while (get_mr(nr, cs, LPDDR2_MR0) & LPDDR2_MR0_DAI_MASK)
;
set_mr(nr, cs, LPDDR2_MR10, 0x56);
set_mr(nr, cs, LPDDR2_MR1, 0x43);
set_mr(nr, cs, LPDDR2_MR2, 0x2);
mr_addr = LPDDR2_MR2 | EMIF_REG_REFRESH_EN_MASK;
set_mr(nr, cs, mr_addr, 0x2);
}
/*
* Configure EMIF4D5 registers and MR registers For details about these magic
* values please see the EMIF registers section of the TRM.
*/
void config_sdram_emif4d5(const struct emif_regs *regs, int nr)
{
writel(0xA0, &emif_reg[nr]->emif_pwr_mgmt_ctrl);
writel(0xA0, &emif_reg[nr]->emif_pwr_mgmt_ctrl_shdw);
writel(regs->zq_config, &emif_reg[nr]->emif_zq_config);
writel(regs->temp_alert_config, &emif_reg[nr]->emif_temp_alert_config);
writel(regs->emif_rd_wr_lvl_rmp_win,
&emif_reg[nr]->emif_rd_wr_lvl_rmp_win);
writel(regs->emif_rd_wr_lvl_rmp_ctl,
&emif_reg[nr]->emif_rd_wr_lvl_rmp_ctl);
writel(regs->emif_rd_wr_lvl_ctl, &emif_reg[nr]->emif_rd_wr_lvl_ctl);
writel(regs->emif_rd_wr_exec_thresh,
&emif_reg[nr]->emif_rd_wr_exec_thresh);
/*
* for most SOCs these registers won't need to be changed so only
* write to these registers if someone explicitly has set the
* register's value.
*/
if(regs->emif_cos_config) {
writel(regs->emif_prio_class_serv_map, &emif_reg[nr]->emif_prio_class_serv_map);
writel(regs->emif_connect_id_serv_1_map, &emif_reg[nr]->emif_connect_id_serv_1_map);
writel(regs->emif_connect_id_serv_2_map, &emif_reg[nr]->emif_connect_id_serv_2_map);
writel(regs->emif_cos_config, &emif_reg[nr]->emif_cos_config);
}
/*
* Sequence to ensure that the PHY is in a known state prior to
* startting hardware leveling. Also acts as to latch some state from
* the EMIF into the PHY.
*/
writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
writel(0x2411, &emif_reg[nr]->emif_iodft_tlgc);
writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
clrbits_le32(&emif_reg[nr]->emif_sdram_ref_ctrl,
EMIF_REG_INITREF_DIS_MASK);
writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
writel(regs->sdram_config, &cstat->secure_emif_sdram_config);
writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl);
writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl_shdw);
/* Perform hardware leveling. */
udelay(1000);
writel(readl(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_36) |
0x100, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36);
writel(readl(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw) |
0x100, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw);
writel(0x80000000, &emif_reg[nr]->emif_rd_wr_lvl_rmp_ctl);
/* Enable read leveling */
writel(0x80000000, &emif_reg[nr]->emif_rd_wr_lvl_ctl);
/*
* Enable full read and write leveling. Wait for read and write
* leveling bit to clear RDWRLVLFULL_START bit 31
*/
while((readl(&emif_reg[nr]->emif_rd_wr_lvl_ctl) & 0x80000000) != 0)
;
/* Check the timeout register to see if leveling is complete */
if((readl(&emif_reg[nr]->emif_status) & 0x70) != 0)
puts("DDR3 H/W leveling incomplete with errors\n");
if (emif_sdram_type() == EMIF_SDRAM_TYPE_LPDDR2) {
configure_mr(nr, 0);
configure_mr(nr, 1);
}
}
/**
* Configure SDRAM
*/
void config_sdram(const struct emif_regs *regs, int nr)
{
if (regs->zq_config) {
writel(regs->zq_config, &emif_reg[nr]->emif_zq_config);
writel(regs->sdram_config, &cstat->secure_emif_sdram_config);
writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config);
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->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);
}
/**
* Set SDRAM timings
*/
void set_sdram_timings(const struct emif_regs *regs, int nr)
{
writel(regs->sdram_tim1, &emif_reg[nr]->emif_sdram_tim_1);
writel(regs->sdram_tim1, &emif_reg[nr]->emif_sdram_tim_1_shdw);
writel(regs->sdram_tim2, &emif_reg[nr]->emif_sdram_tim_2);
writel(regs->sdram_tim2, &emif_reg[nr]->emif_sdram_tim_2_shdw);
writel(regs->sdram_tim3, &emif_reg[nr]->emif_sdram_tim_3);
writel(regs->sdram_tim3, &emif_reg[nr]->emif_sdram_tim_3_shdw);
}
/*
* Configure EXT PHY registers for hardware leveling
*/
static void ext_phy_settings(const struct emif_regs *regs, int nr)
{
/*
* Enable hardware leveling on the EMIF. For details about these
* magic values please see the EMIF registers section of the TRM.
*/
writel(0x08020080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1);
writel(0x08020080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_1_shdw);
writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_22);
writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_22_shdw);
writel(0x00600020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_23);
writel(0x00600020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_23_shdw);
writel(0x40010080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_24);
writel(0x40010080, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_24_shdw);
writel(0x08102040, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_25);
writel(0x08102040, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_25_shdw);
writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_26);
writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_26_shdw);
writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_27);
writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_27_shdw);
writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_28);
writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_28_shdw);
writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_29);
writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_29_shdw);
writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_30);
writel(0x00200020, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_30_shdw);
writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_31);
writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_31_shdw);
writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_32);
writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_32_shdw);
writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_33);
writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_33_shdw);
writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_34);
writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_34_shdw);
writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_35);
writel(0x00000000, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_35_shdw);
writel(0x000000FF, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36);
writel(0x000000FF, &emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw);
/*
* Sequence to ensure that the PHY is again in a known state after
* hardware leveling.
*/
writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
writel(0x2411, &emif_reg[nr]->emif_iodft_tlgc);
writel(0x2011, &emif_reg[nr]->emif_iodft_tlgc);
}
/**
* Configure DDR PHY
*/
void config_ddr_phy(const struct emif_regs *regs, int nr)
{
/*
* Disable initialization and refreshes for now until we
* finish programming EMIF regs.
* Also set time between rising edge of DDR_RESET to rising
* edge of DDR_CKE to > 500us per memory spec.
*/
#ifndef CONFIG_AM43XX
setbits_le32(&emif_reg[nr]->emif_sdram_ref_ctrl,
EMIF_REG_INITREF_DIS_MASK);
#endif
if (regs->zq_config)
writel(0x80003100, &emif_reg[nr]->emif_sdram_ref_ctrl);
writel(regs->emif_ddr_phy_ctlr_1,
&emif_reg[nr]->emif_ddr_phy_ctrl_1);
writel(regs->emif_ddr_phy_ctlr_1,
&emif_reg[nr]->emif_ddr_phy_ctrl_1_shdw);
if (get_emif_rev((u32)emif_reg[nr]) == EMIF_4D5)
ext_phy_settings(regs, nr);
}
/**
* Configure DDR CMD control registers
*/
void config_cmd_ctrl(const struct cmd_control *cmd, int nr)
{
if (!cmd)
return;
writel(cmd->cmd0csratio, &ddr_cmd_reg[nr]->cm0csratio);
writel(cmd->cmd0iclkout, &ddr_cmd_reg[nr]->cm0iclkout);
writel(cmd->cmd1csratio, &ddr_cmd_reg[nr]->cm1csratio);
writel(cmd->cmd1iclkout, &ddr_cmd_reg[nr]->cm1iclkout);
writel(cmd->cmd2csratio, &ddr_cmd_reg[nr]->cm2csratio);
writel(cmd->cmd2iclkout, &ddr_cmd_reg[nr]->cm2iclkout);
}
/**
* Configure DDR DATA registers
*/
void config_ddr_data(const struct ddr_data *data, int nr)
{
int i;
if (!data)
return;
for (i = 0; i < DDR_DATA_REGS_NR; i++) {
writel(data->datardsratio0,
&(ddr_data_reg[nr]+i)->dt0rdsratio0);
writel(data->datawdsratio0,
&(ddr_data_reg[nr]+i)->dt0wdsratio0);
writel(data->datawiratio0,
&(ddr_data_reg[nr]+i)->dt0wiratio0);
writel(data->datagiratio0,
&(ddr_data_reg[nr]+i)->dt0giratio0);
writel(data->datafwsratio0,
&(ddr_data_reg[nr]+i)->dt0fwsratio0);
writel(data->datawrsratio0,
&(ddr_data_reg[nr]+i)->dt0wrsratio0);
}
}
void config_io_ctrl(const struct ctrl_ioregs *ioregs)
{
if (!ioregs)
return;
writel(ioregs->cm0ioctl, &ioctrl_reg->cm0ioctl);
writel(ioregs->cm1ioctl, &ioctrl_reg->cm1ioctl);
writel(ioregs->cm2ioctl, &ioctrl_reg->cm2ioctl);
writel(ioregs->dt0ioctl, &ioctrl_reg->dt0ioctl);
writel(ioregs->dt1ioctl, &ioctrl_reg->dt1ioctl);
#ifdef CONFIG_AM43XX
writel(ioregs->dt2ioctrl, &ioctrl_reg->dt2ioctrl);
writel(ioregs->dt3ioctrl, &ioctrl_reg->dt3ioctrl);
writel(ioregs->emif_sdram_config_ext,
&ioctrl_reg->emif_sdram_config_ext);
#endif
}
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