diff options
Diffstat (limited to 'board/freescale/imx93_frdm/spl.c')
| -rw-r--r-- | board/freescale/imx93_frdm/spl.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/board/freescale/imx93_frdm/spl.c b/board/freescale/imx93_frdm/spl.c new file mode 100644 index 00000000000..006c752d071 --- /dev/null +++ b/board/freescale/imx93_frdm/spl.c @@ -0,0 +1,195 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2025 NXP + */ + +#include "lpddr4_timing.h" + +#include <init.h> +#include <spl.h> +#include <asm/arch/clock.h> +#include <asm/arch/ddr.h> +#include <asm/arch/mu.h> +#include <asm/arch/sys_proto.h> +#include <asm/arch/trdc.h> +#include <asm/mach-imx/boot_mode.h> +#include <asm/mach-imx/ele_api.h> +#include <asm/global_data.h> +#include <asm/sections.h> +#include <dm/device.h> +#include <dm/device-internal.h> +#include <dm/uclass.h> +#include <dm/uclass-internal.h> +#include <linux/delay.h> +#include <power/pca9450.h> +#include <power/pmic.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define SRC_DDRC_SW_CTRL (0x44461020) +#define SRC_DDRPHY_SINGLE_RESET_SW_CTRL (0x44461424) + +static struct _drams { + u8 mr8; + struct dram_timing_info *pdram_timing; + char *name; +} frdm_drams[2] = { + {0x10, &dram_timing_1GB, "1GB DRAM" }, + {0x18, &dram_timing_2GB, "2GB DRAM" }, +}; + +int spl_board_boot_device(enum boot_device boot_dev_spl) +{ + return BOOT_DEVICE_BOOTROM; +} + +void spl_board_init(void) +{ + int ret; + + ret = ele_start_rng(); + if (ret) + printf("Fail to start RNG: %d\n", ret); + + puts("Normal Boot\n"); +} + +void spl_dram_init(void) +{ + int i; + int ret; + + for (i = 0; i < ARRAY_SIZE(frdm_drams); i++) { + struct dram_timing_info *ptiming = frdm_drams[i].pdram_timing; + + printf("DDR: %uMTS\n", ptiming->fsp_msg[0].drate); + ret = ddr_init(ptiming); + if (ret == 0) { + if (lpddr4_mr_read(1, 8) == frdm_drams[i].mr8) { + printf("found DRAM %s matched\n", frdm_drams[i].name); + break; + } + + /* Power down and Power up DDR Mixer */ + + /* Clear PwrOkIn via DDRMIX register */ + setbits_32(SRC_DDRPHY_SINGLE_RESET_SW_CTRL, BIT(0)); + /* Power off the DDRMIX */ + setbits_32(SRC_DDRC_SW_CTRL, BIT(31)); + + udelay(50); + + /* Power up the DDRMIX */ + clrbits_32(SRC_DDRC_SW_CTRL, BIT(31)); + setbits_32(SRC_DDRC_SW_CTRL, BIT(0)); + udelay(10); + clrbits_32(SRC_DDRC_SW_CTRL, BIT(0)); + udelay(10); + } + } +} + +int power_init_board(void) +{ + struct udevice *dev; + int ret; + unsigned int val = 0, buck_val; + + ret = pmic_get("pmic@25", &dev); + if (ret == -ENODEV) { + puts("No pca9450@25\n"); + return 0; + } + if (ret != 0) + return ret; + + /* BUCKxOUT_DVS0/1 control BUCK123 output */ + pmic_reg_write(dev, PCA9450_BUCK123_DVS, 0x29); + + /* Enable DVS control through PMIC_STBY_REQ */ + pmic_reg_write(dev, PCA9450_BUCK1CTRL, 0x59); + + ret = pmic_reg_read(dev, PCA9450_PWR_CTRL); + if (ret < 0) + return ret; + + val = ret; + + if (is_voltage_mode(VOLT_LOW_DRIVE)) { + buck_val = 0x0c; /* 0.8V for Low drive mode */ + printf("PMIC: Low Drive Voltage Mode\n"); + } else if (is_voltage_mode(VOLT_NOMINAL_DRIVE)) { + buck_val = 0x10; /* 0.85V for Nominal drive mode */ + printf("PMIC: Nominal Voltage Mode\n"); + } else { + buck_val = 0x14; /* 0.9V for Over drive mode */ + printf("PMIC: Over Drive Voltage Mode\n"); + } + + if (val & PCA9450_REG_PWRCTRL_TOFF_DEB) { + pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, buck_val); + pmic_reg_write(dev, PCA9450_BUCK3OUT_DVS0, buck_val); + } else { + pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, buck_val + 0x4); + pmic_reg_write(dev, PCA9450_BUCK3OUT_DVS0, buck_val + 0x4); + } + + /* Set standby voltage to 0.65V */ + if (val & PCA9450_REG_PWRCTRL_TOFF_DEB) + pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS1, 0x0); + else + pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS1, 0x4); + + /* I2C_LT_EN*/ + pmic_reg_write(dev, 0xa, 0x3); + return 0; +} + +void board_init_f(ulong dummy) +{ + int ret; + + /* Clear the BSS. */ + memset(__bss_start, 0, __bss_end - __bss_start); + + timer_init(); + + arch_cpu_init(); + + board_early_init_f(); + + spl_early_init(); + + preloader_console_init(); + + ret = imx9_probe_mu(); + if (ret) { + printf("Fail to init Sentinel API\n"); + } else { + debug("SOC: 0x%x\n", gd->arch.soc_rev); + debug("LC: 0x%x\n", gd->arch.lifecycle); + } + + clock_init_late(); + + power_init_board(); + + if (!is_voltage_mode(VOLT_LOW_DRIVE)) + set_arm_clk(get_cpu_speed_grade_hz()); + + /* Init power of mix */ + soc_power_init(); + + /* Setup TRDC for DDR access */ + trdc_init(); + + /* DDR initialization */ + spl_dram_init(); + + /* Put M33 into CPUWAIT for following kick */ + ret = m33_prepare(); + if (!ret) + printf("M33 prepare ok\n"); + + board_init_r(NULL, 0); +} |