diff options
Diffstat (limited to 'board/data_modul/imx8mm_edm_sbc/spl.c')
| -rw-r--r-- | board/data_modul/imx8mm_edm_sbc/spl.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/board/data_modul/imx8mm_edm_sbc/spl.c b/board/data_modul/imx8mm_edm_sbc/spl.c new file mode 100644 index 00000000000..36cad14fc41 --- /dev/null +++ b/board/data_modul/imx8mm_edm_sbc/spl.c @@ -0,0 +1,179 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2022 Marek Vasut <marex@denx.de> + */ + +#include <common.h> +#include <hang.h> +#include <image.h> +#include <init.h> +#include <spl.h> +#include <asm/io.h> +#include <asm-generic/gpio.h> +#include <asm/arch/clock.h> +#include <asm/arch/imx8mm_pins.h> +#include <asm/arch/sys_proto.h> +#include <asm/arch/ddr.h> +#include <asm/mach-imx/boot_mode.h> + +#include <dm/uclass.h> +#include <dm/device.h> +#include <dm/uclass-internal.h> +#include <dm/device-internal.h> + +#include <power/pmic.h> +#include <power/bd71837.h> + +#include "lpddr4_timing.h" + +DECLARE_GLOBAL_DATA_PTR; + +#define UART_PAD_CTRL (PAD_CTL_DSE6 | PAD_CTL_FSEL1) +#define WDOG_PAD_CTRL (PAD_CTL_DSE6 | PAD_CTL_ODE | PAD_CTL_PUE | PAD_CTL_PE) + +static const iomux_v3_cfg_t uart_pads[] = { + IMX8MM_PAD_UART3_RXD_UART3_RX | MUX_PAD_CTRL(UART_PAD_CTRL), + IMX8MM_PAD_UART3_TXD_UART3_TX | MUX_PAD_CTRL(UART_PAD_CTRL), +}; + +static const iomux_v3_cfg_t wdog_pads[] = { + IMX8MM_PAD_GPIO1_IO02_WDOG1_WDOG_B | MUX_PAD_CTRL(WDOG_PAD_CTRL), +}; + +static void data_modul_imx8mm_edm_sbc_early_init_f(void) +{ + struct wdog_regs *wdog = (struct wdog_regs *)WDOG1_BASE_ADDR; + + imx_iomux_v3_setup_multiple_pads(wdog_pads, ARRAY_SIZE(wdog_pads)); + + set_wdog_reset(wdog); + + imx_iomux_v3_setup_multiple_pads(uart_pads, ARRAY_SIZE(uart_pads)); +} + +static int data_modul_imx8mm_edm_sbc_board_power_init(void) +{ + struct udevice *dev; + int ret; + + ret = pmic_get("pmic@4b", &dev); + if (ret == -ENODEV) { + puts("Failed to get PMIC\n"); + return 0; + } + if (ret != 0) + return ret; + + /* Unlock the PMIC regs */ + pmic_reg_write(dev, BD718XX_REGLOCK, 0x1); + + /* Increase VDD_SOC to typical value 0.85V before first DRAM access */ + pmic_reg_write(dev, BD718XX_BUCK1_VOLT_RUN, 0x0f); + + /* Increase VDD_DRAM to 0.975V for 3GHz DDR */ + pmic_reg_write(dev, BD718XX_1ST_NODVS_BUCK_VOLT, 0x83); + + /* Lock the PMIC regs */ + pmic_reg_write(dev, BD718XX_REGLOCK, 0x11); + + return 0; +} + +int spl_board_boot_device(enum boot_device boot_dev_spl) +{ + if (boot_dev_spl == MMC3_BOOT) + return BOOT_DEVICE_MMC2; /* eMMC */ + else + return BOOT_DEVICE_MMC1; /* SD */ +} + +void board_boot_order(u32 *spl_boot_list) +{ + int boot_device = spl_boot_device(); + + spl_boot_list[0] = boot_device; /* 1:SD 2:eMMC */ + + if (boot_device == BOOT_DEVICE_MMC1) + spl_boot_list[1] = BOOT_DEVICE_MMC2; /* eMMC */ + else + spl_boot_list[1] = BOOT_DEVICE_MMC1; /* SD */ + + spl_boot_list[2] = BOOT_DEVICE_UART; /* YModem */ + spl_boot_list[3] = BOOT_DEVICE_NONE; +} + +static struct dram_timing_info *dram_timing_info[8] = { + &dmo_imx8mm_sbc_dram_timing_32_32, /* 32 Gbit x32 */ + NULL, /* 32 Gbit x16 */ + &dmo_imx8mm_sbc_dram_timing_16_32, /* 16 Gbit x32 */ + NULL, /* 16 Gbit x16 */ + NULL, /* 8 Gbit x32 */ + NULL, /* 8 Gbit x16 */ + NULL, /* INVALID */ + NULL, /* INVALID */ +}; + +static void spl_dram_init(void) +{ + u8 memcfg = dmo_get_memcfg(); + int i; + + printf("DDR: %d GiB x%d [0x%x]\n", + /* 0..4 GiB, 1..2 GiB, 0..1 GiB */ + 4 >> ((memcfg >> 1) & 0x3), + /* 0..x32, 1..x16 */ + 32 >> (memcfg & BIT(0)), + memcfg); + + if (!dram_timing_info[memcfg]) { + printf("Unsupported DRAM strapping, trying lowest supported. MEMCFG=0x%x\n", + memcfg); + for (i = ARRAY_SIZE(dram_timing_info) - 1; i >= 0; i--) + if (dram_timing_info[i]) /* Configuration found */ + break; + } + + ddr_init(dram_timing_info[memcfg]); +} + +void board_init_f(ulong dummy) +{ + struct udevice *dev; + int ret; + + icache_enable(); + + arch_cpu_init(); + + init_uart_clk(2); + + data_modul_imx8mm_edm_sbc_early_init_f(); + + preloader_console_init(); + + /* Clear the BSS. */ + memset(__bss_start, 0, __bss_end - __bss_start); + + ret = spl_early_init(); + if (ret) { + debug("spl_early_init() failed: %d\n", ret); + hang(); + } + + ret = uclass_get_device_by_name(UCLASS_CLK, + "clock-controller@30380000", + &dev); + if (ret < 0) { + printf("Failed to find clock node. Check device tree\n"); + hang(); + } + + enable_tzc380(); + + data_modul_imx8mm_edm_sbc_board_power_init(); + + /* DDR initialization */ + spl_dram_init(); + + board_init_r(NULL, 0); +} |