| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| /* |
| * Taken and adapted from U-Boot. |
| */ |
| |
| #include "sdram.h" |
| #include <types.h> |
| #include <device/mmio.h> |
| #include <delay.h> |
| #include "clock.h" |
| |
| static struct vtp_reg *vtpreg[2] = {(struct vtp_reg *)VTP0_CTRL_ADDR, |
| (struct vtp_reg *)VTP1_CTRL_ADDR}; |
| |
| /** |
| * 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}; |
| |
| struct ctrl_stat *cstat = (struct ctrl_stat *)CTRL_BASE; |
| |
| static struct ddr_ctrl *ddrctrl = (struct ddr_ctrl *)DDR_CTRL_ADDR; |
| |
| |
| static void config_vtp(int nr) |
| { |
| write32(&vtpreg[nr]->vtp0ctrlreg, read32(&vtpreg[nr]->vtp0ctrlreg) | VTP_CTRL_ENABLE); |
| write32(&vtpreg[nr]->vtp0ctrlreg, |
| read32(&vtpreg[nr]->vtp0ctrlreg) & (~VTP_CTRL_START_EN)); |
| write32(&vtpreg[nr]->vtp0ctrlreg, read32(&vtpreg[nr]->vtp0ctrlreg) | VTP_CTRL_START_EN); |
| |
| /* Poll for READY */ |
| while ((read32(&vtpreg[nr]->vtp0ctrlreg) & VTP_CTRL_READY) != VTP_CTRL_READY) |
| ; |
| } |
| |
| /** |
| * Configure SDRAM |
| */ |
| static void config_sdram(const struct emif_regs *regs, int nr) |
| { |
| if (regs->zq_config) { |
| write32(&emif_reg[nr]->emif_zq_config, regs->zq_config); |
| write32(&cstat->secure_emif_sdram_config, regs->sdram_config); |
| write32(&emif_reg[nr]->emif_sdram_config, regs->sdram_config); |
| |
| /* Trigger initialization */ |
| write32(&emif_reg[nr]->emif_sdram_ref_ctrl, 0x00003100); |
| /* Wait 1ms because of L3 timeout error */ |
| udelay(1000); |
| |
| /* Write proper sdram_ref_cref_ctrl value */ |
| write32(&emif_reg[nr]->emif_sdram_ref_ctrl, regs->ref_ctrl); |
| write32(&emif_reg[nr]->emif_sdram_ref_ctrl_shdw, regs->ref_ctrl); |
| } |
| write32(&emif_reg[nr]->emif_sdram_ref_ctrl, regs->ref_ctrl); |
| write32(&emif_reg[nr]->emif_sdram_ref_ctrl_shdw, regs->ref_ctrl); |
| write32(&emif_reg[nr]->emif_sdram_config, regs->sdram_config); |
| |
| /* Write REG_COS_COUNT_1, REG_COS_COUNT_2, and REG_PR_OLD_COUNT. */ |
| if (regs->ocp_config) |
| write32(&emif_reg[nr]->emif_l3_config, regs->ocp_config); |
| } |
| |
| /** |
| * Configure DDR DATA registers |
| */ |
| static 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++) { |
| write32(&(ddr_data_reg[nr] + i)->dt0rdsratio0, data->datardsratio0); |
| write32(&(ddr_data_reg[nr] + i)->dt0wdsratio0, data->datawdsratio0); |
| write32(&(ddr_data_reg[nr] + i)->dt0wiratio0, data->datawiratio0); |
| write32(&(ddr_data_reg[nr] + i)->dt0giratio0, data->datagiratio0); |
| write32(&(ddr_data_reg[nr] + i)->dt0fwsratio0, data->datafwsratio0); |
| write32(&(ddr_data_reg[nr] + i)->dt0wrsratio0, data->datawrsratio0); |
| } |
| } |
| |
| static void config_io_ctrl(const struct ctrl_ioregs *ioregs) |
| { |
| if (!ioregs) |
| return; |
| |
| write32(&ioctrl_reg->cm0ioctl, ioregs->cm0ioctl); |
| write32(&ioctrl_reg->cm1ioctl, ioregs->cm1ioctl); |
| write32(&ioctrl_reg->cm2ioctl, ioregs->cm2ioctl); |
| write32(&ioctrl_reg->dt0ioctl, ioregs->dt0ioctl); |
| write32(&ioctrl_reg->dt1ioctl, ioregs->dt1ioctl); |
| } |
| |
| |
| /** |
| * Configure DDR CMD control registers |
| */ |
| static void config_cmd_ctrl(const struct cmd_control *cmd, int nr) |
| { |
| if (!cmd) |
| return; |
| |
| write32(&ddr_cmd_reg[nr]->cm0csratio, cmd->cmd0csratio); |
| write32(&ddr_cmd_reg[nr]->cm0iclkout, cmd->cmd0iclkout); |
| |
| write32(&ddr_cmd_reg[nr]->cm1csratio, cmd->cmd1csratio); |
| write32(&ddr_cmd_reg[nr]->cm1iclkout, cmd->cmd1iclkout); |
| |
| write32(&ddr_cmd_reg[nr]->cm2csratio, cmd->cmd2csratio); |
| write32(&ddr_cmd_reg[nr]->cm2iclkout, cmd->cmd2iclkout); |
| } |
| |
| static inline uint32_t get_emif_rev(uint32_t base) |
| { |
| struct emif_reg_struct *emif = (struct emif_reg_struct *)base; |
| |
| return (read32(&emif->emif_mod_id_rev) & EMIF_REG_MAJOR_REVISION_MASK) |
| >> EMIF_REG_MAJOR_REVISION_SHIFT; |
| } |
| |
| /* |
| * Get SDRAM type connected to EMIF. |
| * Assuming similar SDRAM parts are connected to both EMIF's |
| * which is typically the case. So it is sufficient to get |
| * SDRAM type from EMIF1. |
| */ |
| static inline uint32_t emif_sdram_type(uint32_t sdram_config) |
| { |
| return (sdram_config & EMIF_REG_SDRAM_TYPE_MASK) >> EMIF_REG_SDRAM_TYPE_SHIFT; |
| } |
| |
| /* |
| * Configure EXT PHY registers for software leveling |
| */ |
| static void ext_phy_settings_swlvl(const struct emif_regs *regs, int nr) |
| { |
| uint32_t *ext_phy_ctrl_base = 0; |
| uint32_t *emif_ext_phy_ctrl_base = 0; |
| uint32_t i = 0; |
| |
| ext_phy_ctrl_base = (uint32_t *)&(regs->emif_ddr_ext_phy_ctrl_1); |
| emif_ext_phy_ctrl_base = (uint32_t *)&(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++) { |
| write32(emif_ext_phy_ctrl_base++, *ext_phy_ctrl_base); |
| /* Update shadow registers */ |
| write32(emif_ext_phy_ctrl_base++, *ext_phy_ctrl_base++); |
| } |
| } |
| |
| /* |
| * 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. |
| */ |
| if (regs->emif_ddr_phy_ctlr_1 & 0x00040000) { |
| /* PHY_INVERT_CLKOUT = 1 */ |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_1, 0x00040100); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_1_shdw, 0x00040100); |
| } else { |
| /* PHY_INVERT_CLKOUT = 0 */ |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_1, 0x08020080); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_1_shdw, 0x08020080); |
| } |
| |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_22, 0x00000000); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_22_shdw, 0x00000000); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_23, 0x00600020); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_23_shdw, 0x00600020); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_24, 0x40010080); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_24_shdw, 0x40010080); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_25, 0x08102040); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_25_shdw, 0x08102040); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_26, 0x00200020); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_26_shdw, 0x00200020); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_27, 0x00200020); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_27_shdw, 0x00200020); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_28, 0x00200020); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_28_shdw, 0x00200020); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_29, 0x00200020); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_29_shdw, 0x00200020); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_30, 0x00200020); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_30_shdw, 0x00200020); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_31, 0x00000000); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_31_shdw, 0x00000000); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_32, 0x00000000); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_32_shdw, 0x00000000); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_33, 0x00000000); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_33_shdw, 0x00000000); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_34, 0x00000000); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_34_shdw, 0x00000000); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_35, 0x00000000); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_35_shdw, 0x00000000); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_36, 0x00000077); |
| write32(&emif_reg[nr]->emif_ddr_ext_phy_ctrl_36_shdw, 0x00000077); |
| |
| /* |
| * Sequence to ensure that the PHY is again in a known state after |
| * hardware leveling. |
| */ |
| write32(&emif_reg[nr]->emif_iodft_tlgc, 0x2011); |
| write32(&emif_reg[nr]->emif_iodft_tlgc, 0x2411); |
| write32(&emif_reg[nr]->emif_iodft_tlgc, 0x2011); |
| } |
| |
| |
| /** |
| * Configure DDR PHY |
| */ |
| static 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. |
| */ |
| write32(&emif_reg[nr]->emif_sdram_ref_ctrl, EMIF_REG_INITREF_DIS_MASK | 0x3100); |
| |
| write32(&emif_reg[nr]->emif_ddr_phy_ctrl_1, regs->emif_ddr_phy_ctlr_1); |
| write32(&emif_reg[nr]->emif_ddr_phy_ctrl_1_shdw, regs->emif_ddr_phy_ctlr_1); |
| |
| if (get_emif_rev((uint32_t)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); |
| } |
| } |
| |
| /** |
| * Set SDRAM timings |
| */ |
| static void set_sdram_timings(const struct emif_regs *regs, int nr) |
| { |
| write32(&emif_reg[nr]->emif_sdram_tim_1, regs->sdram_tim1); |
| write32(&emif_reg[nr]->emif_sdram_tim_1_shdw, regs->sdram_tim1); |
| write32(&emif_reg[nr]->emif_sdram_tim_2, regs->sdram_tim2); |
| write32(&emif_reg[nr]->emif_sdram_tim_2_shdw, regs->sdram_tim2); |
| write32(&emif_reg[nr]->emif_sdram_tim_3, regs->sdram_tim3); |
| write32(&emif_reg[nr]->emif_sdram_tim_3_shdw, regs->sdram_tim3); |
| } |
| |
| static void ddr_pll_config(uint32_t ddrpll_m) |
| { |
| uint32_t clkmode, clksel, div_m2; |
| |
| clkmode = read32(&am335x_cm_wkup->clkmode_dpll_ddr); |
| clksel = read32(&am335x_cm_wkup->clksel_dpll_ddr); |
| div_m2 = read32(&am335x_cm_wkup->div_m2_dpll_ddr); |
| |
| /* Set the PLL to bypass Mode */ |
| clkmode = (clkmode & CLK_MODE_MASK) | PLL_BYPASS_MODE; |
| write32(&am335x_cm_wkup->clkmode_dpll_ddr, clkmode); |
| |
| /* Wait till bypass mode is enabled */ |
| while ((read32(&am335x_cm_wkup->idlest_dpll_ddr) & ST_MN_BYPASS) != ST_MN_BYPASS) |
| ; |
| |
| clksel = clksel & (~CLK_SEL_MASK); |
| clksel = clksel | ((ddrpll_m << CLK_SEL_SHIFT) | DDRPLL_N); |
| write32(&am335x_cm_wkup->clksel_dpll_ddr, clksel); |
| |
| div_m2 = div_m2 & CLK_DIV_SEL; |
| div_m2 = div_m2 | DDRPLL_M2; |
| write32(&am335x_cm_wkup->div_m2_dpll_ddr, div_m2); |
| |
| clkmode = (clkmode & CLK_MODE_MASK) | CLK_MODE_SEL; |
| write32(&am335x_cm_wkup->clkmode_dpll_ddr, clkmode); |
| |
| /* Wait till dpll is locked */ |
| while ((read32(&am335x_cm_wkup->idlest_dpll_ddr) & ST_DPLL_CLK) != ST_DPLL_CLK) |
| ; |
| } |
| |
| |
| static void enable_emif_clocks(void) |
| { |
| /* Enable EMIF0 Clock */ |
| write32(&am335x_cm_per->emif, CM_MODULEMODE_ENABLED); |
| /* Poll if module is functional */ |
| while ((read32(&am335x_cm_per->emif)) != CM_MODULEMODE_ENABLED) |
| ; |
| } |
| |
| void config_ddr(uint32_t pll, const struct ctrl_ioregs *ioregs, const struct ddr_data *data, |
| const struct cmd_control *ctrl, const struct emif_regs *regs, int nr) |
| { |
| enable_emif_clocks(); |
| ddr_pll_config(pll); |
| config_vtp(nr); |
| config_cmd_ctrl(ctrl, nr); |
| config_ddr_data(data, nr); |
| config_io_ctrl(ioregs); |
| |
| /* Set CKE to be controlled by EMIF/DDR PHY */ |
| write32(&ddrctrl->ddrckectrl, DDR_CKE_CTRL_NORMAL); |
| |
| /* Program EMIF instance */ |
| config_ddr_phy(regs, nr); |
| |
| set_sdram_timings(regs, nr); |
| config_sdram(regs, nr); |
| } |