| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2012 Samsung Electronics |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* DDR3 mem setup file for SMDK5250 board based on EXYNOS5 */ |
| |
| #include <delay.h> |
| #include <arch/io.h> |
| #include <console/console.h> |
| #include "clk.h" |
| #include "cpu.h" |
| #include "dmc.h" |
| #include "setup.h" |
| |
| #define RDLVL_COMPLETE_TIMEOUT 10000 |
| |
| static void reset_phy_ctrl(void) |
| { |
| writel(LPDDR3PHY_CTRL_PHY_RESET_ENABLE, &exynos_clock->lpddr3phy_ctrl); |
| writel(LPDDR3PHY_CTRL_PHY_RESET_DISABLE, &exynos_clock->lpddr3phy_ctrl); |
| |
| #if 0 |
| /* |
| * For proper memory initialization there should be a minimum delay of |
| * 500us after the LPDDR3PHY_CTRL_PHY_RESET signal. |
| * The below value is an approximate value whose calculation in done |
| * considering that sdelay takes 2 instruction for every 1 delay cycle. |
| * And assuming each instruction takes 1 clock cycle i.e 1/(1.7 Ghz)sec |
| * So for 500 usec, the number of delay cycle should be |
| * (500 * 10^-6) * (1.7 * 10^9) / 2 = 425000 |
| * |
| * TODO(hatim.rv@samsung.com): Implement the delay using timer/counter |
| */ |
| sdelay(425000); |
| #endif |
| udelay(500); |
| } |
| |
| int ddr3_mem_ctrl_init(struct mem_timings *mem, unsigned long mem_iv_size, |
| int mem_reset) |
| { |
| unsigned int val; |
| int i; |
| |
| if (mem_reset) |
| reset_phy_ctrl(); |
| |
| /* Set Impedance Output Driver */ |
| val = (mem->impedance << CA_CK_DRVR_DS_OFFSET) | |
| (mem->impedance << CA_CKE_DRVR_DS_OFFSET) | |
| (mem->impedance << CA_CS_DRVR_DS_OFFSET) | |
| (mem->impedance << CA_ADR_DRVR_DS_OFFSET); |
| writel(val, &exynos_phy0_control->phy_con39); |
| writel(val, &exynos_phy1_control->phy_con39); |
| |
| /* Set Read Latency and Burst Length for PHY0 and PHY1 */ |
| val = (mem->ctrl_bstlen << PHY_CON42_CTRL_BSTLEN_SHIFT) | |
| (mem->ctrl_rdlat << PHY_CON42_CTRL_RDLAT_SHIFT); |
| writel(val, &exynos_phy0_control->phy_con42); |
| writel(val, &exynos_phy1_control->phy_con42); |
| |
| /* ZQ Calibration */ |
| if (dmc_config_zq(mem, exynos_phy0_control, exynos_phy1_control)){ |
| printk(BIOS_EMERG, "DRAM ZQ CALIBRATION FAILURE\n"); |
| return SETUP_ERR_ZQ_CALIBRATION_FAILURE; |
| } |
| |
| /* DQ Signal */ |
| writel(mem->phy0_pulld_dqs, &exynos_phy0_control->phy_con14); |
| writel(mem->phy1_pulld_dqs, &exynos_phy1_control->phy_con14); |
| |
| writel(mem->concontrol | (mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT) |
| | (mem->dfi_init_start << CONCONTROL_DFI_INIT_START_SHIFT), |
| &exynos_dmc->concontrol); |
| |
| update_reset_dll(exynos_dmc, DDR_MODE_DDR3); |
| |
| /* DQS Signal */ |
| writel(mem->phy0_dqs, &exynos_phy0_control->phy_con4); |
| writel(mem->phy1_dqs, &exynos_phy1_control->phy_con4); |
| |
| writel(mem->phy0_dq, &exynos_phy0_control->phy_con6); |
| writel(mem->phy1_dq, &exynos_phy1_control->phy_con6); |
| |
| writel(mem->phy0_tFS, &exynos_phy0_control->phy_con10); |
| writel(mem->phy1_tFS, &exynos_phy1_control->phy_con10); |
| |
| val = (mem->ctrl_start_point << PHY_CON12_CTRL_START_POINT_SHIFT) | |
| (mem->ctrl_inc << PHY_CON12_CTRL_INC_SHIFT) | |
| (mem->ctrl_dll_on << PHY_CON12_CTRL_DLL_ON_SHIFT) | |
| (mem->ctrl_ref << PHY_CON12_CTRL_REF_SHIFT); |
| writel(val, &exynos_phy0_control->phy_con12); |
| writel(val, &exynos_phy1_control->phy_con12); |
| |
| /* Start DLL locking */ |
| writel(val | (mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT), |
| &exynos_phy0_control->phy_con12); |
| writel(val | (mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT), |
| &exynos_phy1_control->phy_con12); |
| |
| update_reset_dll(exynos_dmc, DDR_MODE_DDR3); |
| |
| writel(mem->concontrol | (mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT), |
| &exynos_dmc->concontrol); |
| |
| /* Memory Channel Inteleaving Size */ |
| writel(mem->iv_size, &exynos_dmc->ivcontrol); |
| |
| /* Set DMC MEMCONTROL register */ |
| val = mem->memcontrol & ~DMC_MEMCONTROL_DSREF_ENABLE; |
| writel(val, &exynos_dmc->memcontrol); |
| |
| writel(mem->memconfig, &exynos_dmc->memconfig0); |
| writel(mem->memconfig, &exynos_dmc->memconfig1); |
| writel(mem->membaseconfig0, &exynos_dmc->membaseconfig0); |
| writel(mem->membaseconfig1, &exynos_dmc->membaseconfig1); |
| |
| /* Precharge Configuration */ |
| writel(mem->prechconfig_tp_cnt << PRECHCONFIG_TP_CNT_SHIFT, |
| &exynos_dmc->prechconfig); |
| |
| /* Power Down mode Configuration */ |
| writel(mem->dpwrdn_cyc << PWRDNCONFIG_DPWRDN_CYC_SHIFT | |
| mem->dsref_cyc << PWRDNCONFIG_DSREF_CYC_SHIFT, |
| &exynos_dmc->pwrdnconfig); |
| |
| /* TimingRow, TimingData, TimingPower and Timingaref |
| * values as per Memory AC parameters |
| */ |
| writel(mem->timing_ref, &exynos_dmc->timingref); |
| writel(mem->timing_row, &exynos_dmc->timingrow); |
| writel(mem->timing_data, &exynos_dmc->timingdata); |
| writel(mem->timing_power, &exynos_dmc->timingpower); |
| |
| /* Send PALL command */ |
| dmc_config_prech(mem, exynos_dmc); |
| |
| if (mem_reset) { |
| /* Send NOP, MRS and ZQINIT commands. |
| * Sending MRS command will reset the DRAM. We should not be |
| * reseting the DRAM after resume, this will lead to memory |
| * corruption as DRAM content is lost after DRAM reset |
| */ |
| dmc_config_mrs(mem, exynos_dmc); |
| } |
| |
| if (mem->gate_leveling_enable) { |
| val = PHY_CON0_RESET_VAL; |
| val |= P0_CMD_EN; |
| writel(val, &exynos_phy0_control->phy_con0); |
| writel(val, &exynos_phy1_control->phy_con0); |
| |
| val = PHY_CON2_RESET_VAL; |
| val |= INIT_DESKEW_EN; |
| writel(val, &exynos_phy0_control->phy_con2); |
| writel(val, &exynos_phy1_control->phy_con2); |
| |
| val = PHY_CON0_RESET_VAL; |
| val |= P0_CMD_EN; |
| val |= BYTE_RDLVL_EN; |
| writel(val, &exynos_phy0_control->phy_con0); |
| writel(val, &exynos_phy1_control->phy_con0); |
| |
| val = (mem->ctrl_start_point << |
| PHY_CON12_CTRL_START_POINT_SHIFT) | |
| (mem->ctrl_inc << PHY_CON12_CTRL_INC_SHIFT) | |
| (mem->ctrl_force << PHY_CON12_CTRL_FORCE_SHIFT) | |
| (mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT) | |
| (mem->ctrl_ref << PHY_CON12_CTRL_REF_SHIFT); |
| writel(val, &exynos_phy0_control->phy_con12); |
| writel(val, &exynos_phy1_control->phy_con12); |
| |
| val = PHY_CON2_RESET_VAL; |
| val |= INIT_DESKEW_EN; |
| val |= RDLVL_GATE_EN; |
| writel(val, &exynos_phy0_control->phy_con2); |
| writel(val, &exynos_phy1_control->phy_con2); |
| |
| val = PHY_CON0_RESET_VAL; |
| val |= P0_CMD_EN; |
| val |= BYTE_RDLVL_EN; |
| val |= CTRL_SHGATE; |
| writel(val, &exynos_phy0_control->phy_con0); |
| writel(val, &exynos_phy1_control->phy_con0); |
| |
| val = PHY_CON1_RESET_VAL; |
| val &= ~(CTRL_GATEDURADJ_MASK); |
| writel(val, &exynos_phy0_control->phy_con1); |
| writel(val, &exynos_phy1_control->phy_con1); |
| |
| writel(CTRL_RDLVL_GATE_ENABLE, &exynos_dmc->rdlvl_config); |
| i = RDLVL_COMPLETE_TIMEOUT; |
| while ((readl(&exynos_dmc->phystatus) & |
| (RDLVL_COMPLETE_CHO | RDLVL_COMPLETE_CH1)) != |
| (RDLVL_COMPLETE_CHO | RDLVL_COMPLETE_CH1) && i > 0) { |
| /* |
| * TODO(waihong): Comment on how long this take to |
| * timeout |
| */ |
| udelay(1); |
| i--; |
| } |
| if (!i){ |
| printk(BIOS_EMERG, "Timeout on RDLVL. No DRAM.\n"); |
| return SETUP_ERR_RDLV_COMPLETE_TIMEOUT; |
| } |
| writel(CTRL_RDLVL_GATE_DISABLE, &exynos_dmc->rdlvl_config); |
| |
| writel(0, &exynos_phy0_control->phy_con14); |
| writel(0, &exynos_phy1_control->phy_con14); |
| |
| val = (mem->ctrl_start_point << |
| PHY_CON12_CTRL_START_POINT_SHIFT) | |
| (mem->ctrl_inc << PHY_CON12_CTRL_INC_SHIFT) | |
| (mem->ctrl_force << PHY_CON12_CTRL_FORCE_SHIFT) | |
| (mem->ctrl_start << PHY_CON12_CTRL_START_SHIFT) | |
| (mem->ctrl_dll_on << PHY_CON12_CTRL_DLL_ON_SHIFT) | |
| (mem->ctrl_ref << PHY_CON12_CTRL_REF_SHIFT); |
| writel(val, &exynos_phy0_control->phy_con12); |
| writel(val, &exynos_phy1_control->phy_con12); |
| |
| update_reset_dll(exynos_dmc, DDR_MODE_DDR3); |
| } |
| |
| /* Send PALL command */ |
| dmc_config_prech(mem, exynos_dmc); |
| |
| writel(mem->memcontrol, &exynos_dmc->memcontrol); |
| |
| /* Set DMC Concontrol and enable auto-refresh counter */ |
| writel(mem->concontrol | (mem->rd_fetch << CONCONTROL_RD_FETCH_SHIFT) |
| | (mem->aref_en << CONCONTROL_AREF_EN_SHIFT), |
| &exynos_dmc->concontrol); |
| return 0; |
| } |