diff options
Diffstat (limited to 'board/freescale/imx8ulp_evk/ddr_init.c')
| -rw-r--r-- | board/freescale/imx8ulp_evk/ddr_init.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/board/freescale/imx8ulp_evk/ddr_init.c b/board/freescale/imx8ulp_evk/ddr_init.c new file mode 100644 index 0000000000..f4238d29b3 --- /dev/null +++ b/board/freescale/imx8ulp_evk/ddr_init.c @@ -0,0 +1,207 @@ +// SPDX-License-Identifier: GPL-2.0+ OR MIT +/* + * Copyright 2021 NXP + */ +#include <common.h> +#include <asm/io.h> +#include <asm/arch/clock.h> +#include <asm/arch/ddr.h> +#include <asm/arch/imx-regs.h> + +#define DENALI_CTL_00 (DDR_CTL_BASE_ADDR) +#define CTL_START 0x1 + +#define DENALI_CTL_03 (DDR_CTL_BASE_ADDR + 4 * 3) +#define DENALI_CTL_197 (DDR_CTL_BASE_ADDR + 4 * 197) +#define DENALI_CTL_250 (DDR_CTL_BASE_ADDR + 4 * 250) +#define DENALI_CTL_251 (DDR_CTL_BASE_ADDR + 4 * 251) +#define DENALI_CTL_266 (DDR_CTL_BASE_ADDR + 4 * 266) +#define DFI_INIT_COMPLETE 0x2 + +#define DENALI_CTL_614 (DDR_CTL_BASE_ADDR + 4 * 614) +#define DENALI_CTL_615 (DDR_CTL_BASE_ADDR + 4 * 615) + +#define DENALI_PI_00 (DDR_PI_BASE_ADDR) +#define PI_START 0x1 + +#define DENALI_PI_04 (DDR_PI_BASE_ADDR + 4 * 4) +#define DENALI_PI_11 (DDR_PI_BASE_ADDR + 4 * 11) +#define DENALI_PI_12 (DDR_PI_BASE_ADDR + 4 * 12) +#define DENALI_CTL_23 (DDR_CTL_BASE_ADDR + 4 * 23) +#define DENALI_CTL_25 (DDR_CTL_BASE_ADDR + 4 * 25) + +#define DENALI_PHY_1624 (DDR_PHY_BASE_ADDR + 4 * 1624) +#define DENALI_PHY_1537 (DDR_PHY_BASE_ADDR + 4 * 1537) +#define PHY_FREQ_SEL_MULTICAST_EN(X) ((X) << 8) +#define PHY_FREQ_SEL_INDEX(X) ((X) << 16) + +#define DENALI_PHY_1547 (DDR_PHY_BASE_ADDR + 4 * 1547) +#define DENALI_PHY_1555 (DDR_PHY_BASE_ADDR + 4 * 1555) +#define DENALI_PHY_1564 (DDR_PHY_BASE_ADDR + 4 * 1564) +#define DENALI_PHY_1565 (DDR_PHY_BASE_ADDR + 4 * 1565) + +int ddr_calibration(unsigned int fsp_table[3]) +{ + u32 reg_val; + u32 int_status_init, phy_freq_req, phy_freq_type; + u32 lock_0, lock_1, lock_2; + u32 freq_chg_pt, freq_chg_cnt; + + reg_val = readl(DENALI_CTL_250); + if (((reg_val >> 16) & 0x3) == 1) + freq_chg_cnt = 2; + else + freq_chg_cnt = 3; + + reg_val = readl(DENALI_PI_12); + if (reg_val == 0x3) { + freq_chg_pt = 1; + } else if (reg_val == 0x7) { + freq_chg_pt = 2; + } else { + printf("frequency map(0x%x) is wrong, please check!\r\n", reg_val); + return -1; + } + + debug("%s\n", __func__); + + /* Assert PI_START parameter and then assert START parameter in Controller. */ + reg_val = readl(DENALI_PI_00) | PI_START; + writel(reg_val, DENALI_PI_00); + + reg_val = readl(DENALI_CTL_00) | CTL_START; + writel(reg_val, DENALI_CTL_00); + + /* Poll for init_done_bit in Controller interrupt status register (INT_STATUS_INIT) */ + do { + if (!freq_chg_cnt) { + int_status_init = (readl(DENALI_CTL_266) >> 8) & 0xff; + /* DDR subsystem is ready for traffic. */ + if (int_status_init & DFI_INIT_COMPLETE) { + printf("complete\n"); + break; + } + } + + /* + * During leveling, PHY will request for freq change and SoC clock + * logic should provide requested frequency, Polling SIM LPDDR_CTRL2 + * Bit phy_freq_chg_req until be 1'b1 + */ + reg_val = readl(AVD_SIM_LPDDR_CTRL2); + phy_freq_req = (reg_val >> 7) & 0x1; + + if (phy_freq_req) { + phy_freq_type = reg_val & 0x1F; + if (!phy_freq_type) { + printf("Poll for freq_chg_req on SIM register and change to F0 frequency.\n"); + set_ddr_clk(fsp_table[phy_freq_type] >> 1); + + /* Write 1'b1 at LPDDR_CTRL2 bit phy_freq_cfg_ack */ + reg_val = readl(AVD_SIM_LPDDR_CTRL2); + writel(reg_val | (0x1 << 6), AVD_SIM_LPDDR_CTRL2); + } else if (phy_freq_type == 0x01) { + printf("Poll for freq_chg_req on SIM register and change to F1 frequency.\n"); + set_ddr_clk(fsp_table[phy_freq_type] >> 1); + + /* Write 1'b1 at LPDDR_CTRL2 bit phy_freq_cfg_ack */ + reg_val = readl(AVD_SIM_LPDDR_CTRL2); + writel(reg_val | (0x1 << 6), AVD_SIM_LPDDR_CTRL2); + if (freq_chg_pt == 1) + freq_chg_cnt--; + } else if (phy_freq_type == 0x02) { + printf("Poll for freq_chg_req on SIM register and change to F2 frequency.\n"); + set_ddr_clk(fsp_table[phy_freq_type] >> 1); + + /* Write 1'b1 at LPDDR_CTRL2 bit phy_freq_cfg_ack */ + reg_val = readl(AVD_SIM_LPDDR_CTRL2); + writel(reg_val | (0x1 << 6), AVD_SIM_LPDDR_CTRL2); + if (freq_chg_pt == 2) + freq_chg_cnt--; + } + reg_val = readl(AVD_SIM_LPDDR_CTRL2); + } + } while (1); + + /* Check PLL lock status */ + lock_0 = readl(DENALI_PHY_1564) & 0xffff; + lock_1 = (readl(DENALI_PHY_1564) >> 16) & 0xffff; + lock_2 = readl(DENALI_PHY_1565) & 0xffff; + + if ((lock_0 & 0x3) != 0x3 || (lock_1 & 0x3) != 0x3 || (lock_2 & 0x3) != 0x3) { + printf("De-Skew PLL failed to lock\n"); + printf("lock_0=0x%x, lock_1=0x%x, lock_2=0x%x\n", lock_0, lock_1, lock_2); + return -1; + } + + printf("De-Skew PLL is locked and ready\n"); + return 0; +} + +int ddr_init(struct dram_timing_info2 *dram_timing) +{ + int i; + + debug("%s\n", __func__); + + set_ddr_clk(dram_timing->fsp_table[0] >> 1); /* Set to boot freq */ + + /* Initialize CTL registers */ + for (i = 0; i < dram_timing->ctl_cfg_num; i++) + writel(dram_timing->ctl_cfg[i].val, (ulong)dram_timing->ctl_cfg[i].reg); + + /* Initialize PI registers */ + for (i = 0; i < dram_timing->pi_cfg_num; i++) + writel(dram_timing->pi_cfg[i].val, (ulong)dram_timing->pi_cfg[i].reg); + + /* Write PHY regiters for all 3 frequency points (48Mhz/384Mhz/528Mhz): f1_index=0 */ + writel(PHY_FREQ_SEL_MULTICAST_EN(1) | PHY_FREQ_SEL_INDEX(0), DENALI_PHY_1537); + for (i = 0; i < dram_timing->phy_f1_cfg_num; i++) + writel(dram_timing->phy_f1_cfg[i].val, (ulong)dram_timing->phy_f1_cfg[i].reg); + + /* Write PHY regiters for freqency point 2 (528Mhz): f2_index=1 */ + writel(PHY_FREQ_SEL_MULTICAST_EN(0) | PHY_FREQ_SEL_INDEX(1), DENALI_PHY_1537); + for (i = 0; i < dram_timing->phy_f2_cfg_num; i++) + writel(dram_timing->phy_f2_cfg[i].val, (ulong)dram_timing->phy_f2_cfg[i].reg); + + /* Re-enable MULTICAST mode */ + writel(PHY_FREQ_SEL_MULTICAST_EN(1) | PHY_FREQ_SEL_INDEX(0), DENALI_PHY_1537); + + return ddr_calibration(dram_timing->fsp_table); +} + +void enable_bypass_mode(void) +{ + u32 reg_val; + + /* PI_INIT_LVL_EN=0x0 (DENALI_PI_04) */ + reg_val = readl(DENALI_PI_04) & ~0x1; + writel(reg_val, DENALI_PI_04); + + /* PI_FREQ_MAP=0x1 (DENALI_PI_12) */ + writel(0x1, DENALI_PI_12); + + /* PI_INIT_WORK_FREQ=0x0 (DENALI_PI_11) */ + reg_val = readl(DENALI_PI_11) & ~(0x1f << 8); + writel(reg_val, DENALI_PI_11); + + /* DFIBUS_FREQ_INIT=0x0 (DENALI_CTL_23) */ + reg_val = readl(DENALI_CTL_23) & ~(0x3 << 24); + writel(reg_val, DENALI_CTL_23); + + /* PHY_LP4_BOOT_DISABLE=0x0 (DENALI_PHY_1547) */ + reg_val = readl(DENALI_PHY_1547) & ~(0x1 << 8); + writel(reg_val, DENALI_PHY_1547); + + /* PHY_PLL_BYPASS=0x1 (DENALI_PHY_1624) */ + reg_val = readl(DENALI_PHY_1624) | 0x1; + writel(reg_val, DENALI_PHY_1624); + + /* PHY_LP4_BOOT_PLL_BYPASS to 0x1 (DENALI_PHY_1555) */ + reg_val = readl(DENALI_PHY_1555) | 0x1; + writel(reg_val, DENALI_PHY_1555); + + /* FREQ_CHANGE_TYPE_F0 = 0x0/FREQ_CHANGE_TYPE_F1 = 0x1/FREQ_CHANGE_TYPE_F2 = 0x2 */ + reg_val = 0x020100; + writel(reg_val, DENALI_CTL_25); +} |