// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2016 Freescale Semiconductor, Inc. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #define PMC0_BASE_ADDR 0x410a1000 #define PMC0_CTRL 0x28 #define PMC0_CTRL_LDOEN BIT(31) #define PMC0_CTRL_LDOOKDIS BIT(30) #define PMC0_CTRL_PMC1ON BIT(24) #define PMC1_BASE_ADDR 0x40400000 #define PMC1_RUN 0x8 #define PMC1_STOP 0x10 #define PMC1_VLPS 0x14 #define PMC1_LDOVL_SHIFT 16 #define PMC1_LDOVL_MASK (0x3f << PMC1_LDOVL_SHIFT) #define PMC1_LDOVL_900 0x1e #define PMC1_LDOVL_950 0x23 #define PMC1_STATUS 0x20 #define PMC1_STATUS_LDOVLF BIT(8) static char *get_reset_cause(char *); #if defined(CONFIG_IMX_HAB) struct imx_sec_config_fuse_t const imx_sec_config_fuse = { .bank = 29, .word = 6, }; #endif #define ROM_VERSION_ADDR 0x80 u32 get_cpu_rev(void) { /* Check the ROM version for cpu revision */ u32 rom_version = readl((void __iomem *)ROM_VERSION_ADDR); return (MXC_CPU_MX7ULP << 12) | (rom_version & 0xFF); } #ifdef CONFIG_REVISION_TAG u32 __weak get_board_rev(void) { return get_cpu_rev(); } #endif enum bt_mode get_boot_mode(void) { u32 bt0_cfg = 0; bt0_cfg = readl(CMC0_RBASE + 0x40); bt0_cfg &= (BT0CFG_LPBOOT_MASK | BT0CFG_DUALBOOT_MASK); if (!(bt0_cfg & BT0CFG_LPBOOT_MASK)) { /* No low power boot */ if (bt0_cfg & BT0CFG_DUALBOOT_MASK) return DUAL_BOOT; else return SINGLE_BOOT; } return LOW_POWER_BOOT; } int arch_cpu_init(void) { enable_ca7_smp(); return 0; } #ifdef CONFIG_BOARD_POSTCLK_INIT int board_postclk_init(void) { return 0; } #endif #define UNLOCK_WORD0 0xC520 /* 1st unlock word */ #define UNLOCK_WORD1 0xD928 /* 2nd unlock word */ #define REFRESH_WORD0 0xA602 /* 1st refresh word */ #define REFRESH_WORD1 0xB480 /* 2nd refresh word */ static void disable_wdog(u32 wdog_base) { u32 val_cs = readl(wdog_base + 0x00); if (!(val_cs & 0x80)) return; dmb(); __raw_writel(REFRESH_WORD0, (wdog_base + 0x04)); /* Refresh the CNT */ __raw_writel(REFRESH_WORD1, (wdog_base + 0x04)); dmb(); if (!(val_cs & 800)) { dmb(); __raw_writel(UNLOCK_WORD0, (wdog_base + 0x04)); __raw_writel(UNLOCK_WORD1, (wdog_base + 0x04)); dmb(); while (!(readl(wdog_base + 0x00) & 0x800)); } dmb(); __raw_writel(0x0, wdog_base + 0x0C); /* Set WIN to 0 */ __raw_writel(0x400, wdog_base + 0x08); /* Set timeout to default 0x400 */ __raw_writel(0x120, wdog_base + 0x00); /* Disable it and set update */ dmb(); while (!(readl(wdog_base + 0x00) & 0x400)); } void init_wdog(void) { /* * ROM will configure WDOG1, disable it or enable it * depending on FUSE. The update bit is set for reconfigurable. * We have to use unlock sequence to reconfigure it. * WDOG2 is not touched by ROM, so it will have default value * which is enabled. We can directly configure it. * To simplify the codes, we still use same reconfigure * process as WDOG1. Because the update bit is not set for * WDOG2, the unlock sequence won't take effect really. * It actually directly configure the wdog. * In this function, we will disable both WDOG1 and WDOG2, * and set update bit for both. So that kernel can reconfigure them. */ disable_wdog(WDG1_RBASE); disable_wdog(WDG2_RBASE); } static bool ldo_mode_is_enabled(void) { unsigned int reg; reg = readl(PMC0_BASE_ADDR + PMC0_CTRL); if (reg & PMC0_CTRL_LDOEN) return true; else return false; } #if !defined(CONFIG_SPL) || (defined(CONFIG_SPL) && defined(CONFIG_SPL_BUILD)) #if defined(CONFIG_LDO_ENABLED_MODE) static void init_ldo_mode(void) { unsigned int reg; if (ldo_mode_is_enabled()) return; /* Set LDOOKDIS */ setbits_le32(PMC0_BASE_ADDR + PMC0_CTRL, PMC0_CTRL_LDOOKDIS); /* Set LDOVL to 0.95V in PMC1_RUN */ reg = readl(PMC1_BASE_ADDR + PMC1_RUN); reg &= ~PMC1_LDOVL_MASK; reg |= (PMC1_LDOVL_950 << PMC1_LDOVL_SHIFT); writel(PMC1_BASE_ADDR + PMC1_RUN, reg); /* Wait for LDOVLF to be cleared */ reg = readl(PMC1_BASE_ADDR + PMC1_STATUS); while (reg & PMC1_STATUS_LDOVLF) ; /* Set LDOVL to 0.95V in PMC1_STOP */ reg = readl(PMC1_BASE_ADDR + PMC1_STOP); reg &= ~PMC1_LDOVL_MASK; reg |= (PMC1_LDOVL_950 << PMC1_LDOVL_SHIFT); writel(PMC1_BASE_ADDR + PMC1_STOP, reg); /* Set LDOVL to 0.90V in PMC1_VLPS */ reg = readl(PMC1_BASE_ADDR + PMC1_VLPS); reg &= ~PMC1_LDOVL_MASK; reg |= (PMC1_LDOVL_900 << PMC1_LDOVL_SHIFT); writel(PMC1_BASE_ADDR + PMC1_VLPS, reg); /* Set LDOEN bit */ setbits_le32(PMC0_BASE_ADDR + PMC0_CTRL, PMC0_CTRL_LDOEN); /* Set the PMC1ON bit */ setbits_le32(PMC0_BASE_ADDR + PMC0_CTRL, PMC0_CTRL_PMC1ON); } #endif void s_init(void) { /* Disable wdog */ init_wdog(); /* clock configuration. */ clock_init(); if (soc_rev() < CHIP_REV_2_0) { /* enable dumb pmic */ writel((readl(SNVS_LP_LPCR) | SNVS_LPCR_DPEN), SNVS_LP_LPCR); } #if defined(CONFIG_LDO_ENABLED_MODE) init_ldo_mode(); #endif return; } #endif #ifndef CONFIG_ULP_WATCHDOG void reset_cpu(void) { setbits_le32(SIM0_RBASE, SIM_SOPT1_A7_SW_RESET); while (1) ; } #endif #if defined(CONFIG_DISPLAY_CPUINFO) const char *get_imx_type(u32 imxtype) { return "7ULP"; } int print_cpuinfo(void) { u32 cpurev; char cause[18]; cpurev = get_cpu_rev(); printf("CPU: Freescale i.MX%s rev%d.%d at %d MHz\n", get_imx_type((cpurev & 0xFF000) >> 12), (cpurev & 0x000F0) >> 4, (cpurev & 0x0000F) >> 0, mxc_get_clock(MXC_ARM_CLK) / 1000000); printf("Reset cause: %s\n", get_reset_cause(cause)); printf("Boot mode: "); switch (get_boot_mode()) { case LOW_POWER_BOOT: printf("Low power boot\n"); break; case DUAL_BOOT: printf("Dual boot\n"); break; case SINGLE_BOOT: default: printf("Single boot\n"); break; } if (ldo_mode_is_enabled()) printf("PMC1: LDO enabled mode\n"); else printf("PMC1: LDO bypass mode\n"); return 0; } #endif #define CMC_SRS_TAMPER (1 << 31) #define CMC_SRS_SECURITY (1 << 30) #define CMC_SRS_TZWDG (1 << 29) #define CMC_SRS_JTAG_RST (1 << 28) #define CMC_SRS_CORE1 (1 << 16) #define CMC_SRS_LOCKUP (1 << 15) #define CMC_SRS_SW (1 << 14) #define CMC_SRS_WDG (1 << 13) #define CMC_SRS_PIN_RESET (1 << 8) #define CMC_SRS_WARM (1 << 4) #define CMC_SRS_HVD (1 << 3) #define CMC_SRS_LVD (1 << 2) #define CMC_SRS_POR (1 << 1) #define CMC_SRS_WUP (1 << 0) static u32 reset_cause = -1; static char *get_reset_cause(char *ret) { u32 cause1, cause = 0, srs = 0; u32 *reg_ssrs = (u32 *)(SRC_BASE_ADDR + 0x28); u32 *reg_srs = (u32 *)(SRC_BASE_ADDR + 0x20); if (!ret) return "null"; srs = readl(reg_srs); cause1 = readl(reg_ssrs); writel(cause1, reg_ssrs); reset_cause = cause1; cause = cause1 & (CMC_SRS_POR | CMC_SRS_WUP | CMC_SRS_WARM); switch (cause) { case CMC_SRS_POR: sprintf(ret, "%s", "POR"); break; case CMC_SRS_WUP: sprintf(ret, "%s", "WUP"); break; case CMC_SRS_WARM: cause = cause1 & (CMC_SRS_WDG | CMC_SRS_SW | CMC_SRS_JTAG_RST); switch (cause) { case CMC_SRS_WDG: sprintf(ret, "%s", "WARM-WDG"); break; case CMC_SRS_SW: sprintf(ret, "%s", "WARM-SW"); break; case CMC_SRS_JTAG_RST: sprintf(ret, "%s", "WARM-JTAG"); break; default: sprintf(ret, "%s", "WARM-UNKN"); break; } break; default: sprintf(ret, "%s-%X", "UNKN", cause1); break; } debug("[%X] SRS[%X] %X - ", cause1, srs, srs^cause1); return ret; } #ifdef CONFIG_ENV_IS_IN_MMC __weak int board_mmc_get_env_dev(int devno) { return CONFIG_SYS_MMC_ENV_DEV; } int mmc_get_env_dev(void) { int devno = 0; u32 bt1_cfg = 0; /* If not boot from sd/mmc, use default value */ if (get_boot_mode() == LOW_POWER_BOOT) return CONFIG_SYS_MMC_ENV_DEV; bt1_cfg = readl(CMC1_RBASE + 0x40); devno = (bt1_cfg >> 9) & 0x7; return board_mmc_get_env_dev(devno); } #endif enum boot_device get_boot_device(void) { struct bootrom_sw_info **p = (struct bootrom_sw_info **)ROM_SW_INFO_ADDR; enum boot_device boot_dev = SD1_BOOT; u8 boot_type = (*p)->boot_dev_type; u8 boot_instance = (*p)->boot_dev_instance; switch (boot_type) { case BOOT_TYPE_SD: boot_dev = boot_instance + SD1_BOOT; break; case BOOT_TYPE_MMC: boot_dev = boot_instance + MMC1_BOOT; break; case BOOT_TYPE_USB: boot_dev = USB_BOOT; break; default: break; } return boot_dev; } #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG /* * OCOTP_CFG (SJC CHALLENGE, Unique ID) * i.MX 7ULP Applications Processor Reference Manual, Rev. 0, 09/2020 * * OCOTP_CFG0 offset 0x4B0: 15:0 -> 15:0 bits of Unique ID * OCOTP_CFG1 offset 0x4C0: 15:0 -> 31:16 bits of Unique ID * OCOTP_CFG2 offset 0x4D0: 15:0 -> 47:32 bits of Unique ID * OCOTP_CFG3 offset 0x4E0: 15:0 -> 63:48 bits of Unique ID */ void get_board_serial(struct tag_serialnr *serialnr) { struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR; struct fuse_bank *bank = &ocotp->bank[1]; struct fuse_bank1_regs *fuse = (struct fuse_bank1_regs *)bank->fuse_regs; serialnr->low = (fuse->cfg0 & 0xFFFF) + ((fuse->cfg1 & 0xFFFF) << 16); serialnr->high = (fuse->cfg2 & 0xFFFF) + ((fuse->cfg3 & 0xFFFF) << 16); } #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */