diff options
Diffstat (limited to 'arch/arm/mach-omap2/am33xx/ddr.c')
| -rw-r--r-- | arch/arm/mach-omap2/am33xx/ddr.c | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/am33xx/ddr.c b/arch/arm/mach-omap2/am33xx/ddr.c new file mode 100644 index 0000000000..6acf30c5db --- /dev/null +++ b/arch/arm/mach-omap2/am33xx/ddr.c @@ -0,0 +1,377 @@ +/* + * 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); + + /* Wait 1ms because of L3 timeout error */ + udelay(1000); + + 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 for DDR3 */ + if (emif_sdram_type(regs->sdram_config) == EMIF_SDRAM_TYPE_DDR3) { + 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"); + + } else { + /* DDR2 */ + 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); + + /* Trigger initialization */ + writel(0x00003100, &emif_reg[nr]->emif_sdram_ref_ctrl); + /* Wait 1ms because of L3 timeout error */ + udelay(1000); + + /* Write proper sdram_ref_cref_ctrl value */ + 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 software leveling + */ +static void ext_phy_settings_swlvl(const struct emif_regs *regs, int nr) +{ + u32 *ext_phy_ctrl_base = 0; + u32 *emif_ext_phy_ctrl_base = 0; + __maybe_unused const u32 *ext_phy_ctrl_const_regs; + u32 i = 0; + __maybe_unused 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++); + } + +#ifdef CONFIG_AM43XX + /* + * External phy 6-24 registers do not change with ddr frequency. + * These only need to be set on DDR2 on AM43xx. + */ + 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++); + } +#endif +} + +/* + * Configure EXT PHY registers for hardware leveling + */ +static void ext_phy_settings_hwlvl(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 and set time between rising edge of + * DDR_RESET to rising edge of DDR_CKE to > 500us per memory spec. + * We currently hardcode a value based on a max expected frequency + * of 400MHz. + */ + writel(EMIF_REG_INITREF_DIS_MASK | 0x3100, + &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) { + if (emif_sdram_type(regs->sdram_config) == EMIF_SDRAM_TYPE_DDR3) + ext_phy_settings_hwlvl(regs, nr); + else + ext_phy_settings_swlvl(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 +} |