diff options
Diffstat (limited to 'arch/arm/cpu/armv7/am33xx/ddr.c')
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/ddr.c | 146 |
1 files changed, 140 insertions, 6 deletions
diff --git a/arch/arm/cpu/armv7/am33xx/ddr.c b/arch/arm/cpu/armv7/am33xx/ddr.c index 5b0454c3ea..d05e666a74 100644 --- a/arch/arm/cpu/armv7/am33xx/ddr.c +++ b/arch/arm/cpu/armv7/am33xx/ddr.c @@ -36,6 +36,73 @@ static struct ddr_data_regs *ddr_data_reg[2] = { 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 + */ +void config_sdram_emif4d5(const struct emif_regs *regs, int nr) +{ + writel(0x0, &emif_reg[nr]->emif_pwr_mgmt_ctrl); + writel(0x0, &emif_reg[nr]->emif_pwr_mgmt_ctrl_shdw); + writel(0x1, &emif_reg[nr]->emif_iodft_tlgc); + 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); + + writel(regs->ref_ctrl, &emif_reg[nr]->emif_sdram_ref_ctrl); + writel(regs->sdram_config, &emif_reg[nr]->emif_sdram_config); + + if (emif_sdram_type() == EMIF_SDRAM_TYPE_LPDDR2) { + configure_mr(nr, 0); + configure_mr(nr, 1); + } +} + /** * Configure SDRAM */ @@ -72,15 +139,67 @@ void set_sdram_timings(const struct emif_regs *regs, int nr) writel(regs->sdram_tim3, &emif_reg[nr]->emif_sdram_tim_3_shdw); } +void __weak emif_get_ext_phy_ctrl_const_regs(const u32 **regs, u32 *size) +{ +} + +/* + * Configure EXT PHY registers + */ +static void ext_phy_settings(const struct emif_regs *regs, int nr) +{ + u32 *ext_phy_ctrl_base = 0; + u32 *emif_ext_phy_ctrl_base = 0; + const u32 *ext_phy_ctrl_const_regs; + u32 i = 0; + u32 size; + + ext_phy_ctrl_base = (u32 *)&(regs->emif_ddr_ext_phy_ctrl_1); + emif_ext_phy_ctrl_base = + (u32 *)&(emif_reg[nr]->emif_ddr_ext_phy_ctrl_1); + + /* Configure external phy control timing registers */ + for (i = 0; i < EMIF_EXT_PHY_CTRL_TIMING_REG; i++) { + writel(*ext_phy_ctrl_base, emif_ext_phy_ctrl_base++); + /* Update shadow registers */ + writel(*ext_phy_ctrl_base++, emif_ext_phy_ctrl_base++); + } + + /* + * external phy 6-24 registers do not change with + * ddr frequency + */ + emif_get_ext_phy_ctrl_const_regs(&ext_phy_ctrl_const_regs, &size); + + if (!size) + return; + + for (i = 0; i < size; i++) { + writel(ext_phy_ctrl_const_regs[i], emif_ext_phy_ctrl_base++); + /* Update shadow registers */ + writel(ext_phy_ctrl_const_regs[i], emif_ext_phy_ctrl_base++); + } +} + /** * 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. + */ + setbits_le32(&emif_reg[nr]->emif_sdram_ref_ctrl, + EMIF_REG_INITREF_DIS_MASK); + 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); } /** @@ -88,6 +207,9 @@ void config_ddr_phy(const struct emif_regs *regs, int nr) */ 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); @@ -105,6 +227,9 @@ 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); @@ -121,11 +246,20 @@ void config_ddr_data(const struct ddr_data *data, int nr) } } -void config_io_ctrl(unsigned long val) +void config_io_ctrl(const struct ctrl_ioregs *ioregs) { - writel(val, &ioctrl_reg->cm0ioctl); - writel(val, &ioctrl_reg->cm1ioctl); - writel(val, &ioctrl_reg->cm2ioctl); - writel(val, &ioctrl_reg->dt0ioctl); - writel(val, &ioctrl_reg->dt1ioctl); + 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 } |