// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause /* * Copyright (C) 2018, STMicroelectronics - All Rights Reserved */ #include #include #include #include #include #include #include #include #include #include /* RCC register */ #define RCC_TZCR (STM32_RCC_BASE + 0x00) #define RCC_DBGCFGR (STM32_RCC_BASE + 0x080C) #define RCC_BDCR (STM32_RCC_BASE + 0x0140) #define RCC_MP_APB5ENSETR (STM32_RCC_BASE + 0x0208) #define RCC_BDCR_VSWRST BIT(31) #define RCC_BDCR_RTCSRC GENMASK(17, 16) #define RCC_DBGCFGR_DBGCKEN BIT(8) /* Security register */ #define ETZPC_TZMA1_SIZE (STM32_ETZPC_BASE + 0x04) #define ETZPC_DECPROT0 (STM32_ETZPC_BASE + 0x10) #define TZC_GATE_KEEPER (STM32_TZC_BASE + 0x008) #define TZC_REGION_ATTRIBUTE0 (STM32_TZC_BASE + 0x110) #define TZC_REGION_ID_ACCESS0 (STM32_TZC_BASE + 0x114) #define TAMP_CR1 (STM32_TAMP_BASE + 0x00) #define PWR_CR1 (STM32_PWR_BASE + 0x00) #define PWR_CR1_DBP BIT(8) /* DBGMCU register */ #define DBGMCU_IDC (STM32_DBGMCU_BASE + 0x00) #define DBGMCU_APB4FZ1 (STM32_DBGMCU_BASE + 0x2C) #define DBGMCU_APB4FZ1_IWDG2 BIT(2) #define DBGMCU_IDC_DEV_ID_MASK GENMASK(11, 0) #define DBGMCU_IDC_DEV_ID_SHIFT 0 #define DBGMCU_IDC_REV_ID_MASK GENMASK(31, 16) #define DBGMCU_IDC_REV_ID_SHIFT 16 /* boot interface from Bootrom * - boot instance = bit 31:16 * - boot device = bit 15:0 */ #define BOOTROM_PARAM_ADDR 0x2FFC0078 #define BOOTROM_MODE_MASK GENMASK(15, 0) #define BOOTROM_MODE_SHIFT 0 #define BOOTROM_INSTANCE_MASK GENMASK(31, 16) #define BOOTROM_INSTANCE_SHIFT 16 /* BSEC OTP index */ #define BSEC_OTP_RPN 1 #define BSEC_OTP_SERIAL 13 #define BSEC_OTP_PKG 16 #define BSEC_OTP_MAC 57 /* Device Part Number (RPN) = OTP_DATA1 lower 8 bits */ #define RPN_SHIFT 0 #define RPN_MASK GENMASK(7, 0) /* Package = bit 27:29 of OTP16 * - 100: LBGA448 (FFI) => AA = LFBGA 18x18mm 448 balls p. 0.8mm * - 011: LBGA354 (LCI) => AB = LFBGA 16x16mm 359 balls p. 0.8mm * - 010: TFBGA361 (FFC) => AC = TFBGA 12x12mm 361 balls p. 0.5mm * - 001: TFBGA257 (LCC) => AD = TFBGA 10x10mm 257 balls p. 0.5mm * - others: Reserved */ #define PKG_SHIFT 27 #define PKG_MASK GENMASK(2, 0) #define PKG_AA_LBGA448 4 #define PKG_AB_LBGA354 3 #define PKG_AC_TFBGA361 2 #define PKG_AD_TFBGA257 1 #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD) #ifndef CONFIG_STM32MP1_TRUSTED static void security_init(void) { /* Disable the backup domain write protection */ /* the protection is enable at each reset by hardware */ /* And must be disable by software */ setbits_le32(PWR_CR1, PWR_CR1_DBP); while (!(readl(PWR_CR1) & PWR_CR1_DBP)) ; /* If RTC clock isn't enable so this is a cold boot then we need * to reset the backup domain */ if (!(readl(RCC_BDCR) & RCC_BDCR_RTCSRC)) { setbits_le32(RCC_BDCR, RCC_BDCR_VSWRST); while (!(readl(RCC_BDCR) & RCC_BDCR_VSWRST)) ; clrbits_le32(RCC_BDCR, RCC_BDCR_VSWRST); } /* allow non secure access in Write/Read for all peripheral */ writel(GENMASK(25, 0), ETZPC_DECPROT0); /* Open SYSRAM for no secure access */ writel(0x0, ETZPC_TZMA1_SIZE); /* enable TZC1 TZC2 clock */ writel(BIT(11) | BIT(12), RCC_MP_APB5ENSETR); /* Region 0 set to no access by default */ /* bit 0 / 16 => nsaid0 read/write Enable * bit 1 / 17 => nsaid1 read/write Enable * ... * bit 15 / 31 => nsaid15 read/write Enable */ writel(0xFFFFFFFF, TZC_REGION_ID_ACCESS0); /* bit 30 / 31 => Secure Global Enable : write/read */ /* bit 0 / 1 => Region Enable for filter 0/1 */ writel(BIT(0) | BIT(1) | BIT(30) | BIT(31), TZC_REGION_ATTRIBUTE0); /* Enable Filter 0 and 1 */ setbits_le32(TZC_GATE_KEEPER, BIT(0) | BIT(1)); /* RCC trust zone deactivated */ writel(0x0, RCC_TZCR); /* TAMP: deactivate the internal tamper * Bit 23 ITAMP8E: monotonic counter overflow * Bit 20 ITAMP5E: RTC calendar overflow * Bit 19 ITAMP4E: HSE monitoring * Bit 18 ITAMP3E: LSE monitoring * Bit 16 ITAMP1E: RTC power domain supply monitoring */ writel(0x0, TAMP_CR1); } #endif /* CONFIG_STM32MP1_TRUSTED */ /* * Debug init */ static void dbgmcu_init(void) { setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN); /* Freeze IWDG2 if Cortex-A7 is in debug mode */ setbits_le32(DBGMCU_APB4FZ1, DBGMCU_APB4FZ1_IWDG2); } #endif /* !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD) */ #if !defined(CONFIG_STM32MP1_TRUSTED) && \ (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)) /* get bootmode from ROM code boot context: saved in TAMP register */ static void update_bootmode(void) { u32 boot_mode; u32 bootrom_itf = readl(BOOTROM_PARAM_ADDR); u32 bootrom_device, bootrom_instance; /* enable TAMP clock = RTCAPBEN */ writel(BIT(8), RCC_MP_APB5ENSETR); /* read bootrom context */ bootrom_device = (bootrom_itf & BOOTROM_MODE_MASK) >> BOOTROM_MODE_SHIFT; bootrom_instance = (bootrom_itf & BOOTROM_INSTANCE_MASK) >> BOOTROM_INSTANCE_SHIFT; boot_mode = ((bootrom_device << BOOT_TYPE_SHIFT) & BOOT_TYPE_MASK) | ((bootrom_instance << BOOT_INSTANCE_SHIFT) & BOOT_INSTANCE_MASK); /* save the boot mode in TAMP backup register */ clrsetbits_le32(TAMP_BOOT_CONTEXT, TAMP_BOOT_MODE_MASK, boot_mode << TAMP_BOOT_MODE_SHIFT); } #endif u32 get_bootmode(void) { /* read bootmode from TAMP backup register */ return (readl(TAMP_BOOT_CONTEXT) & TAMP_BOOT_MODE_MASK) >> TAMP_BOOT_MODE_SHIFT; } /* * Early system init */ int arch_cpu_init(void) { u32 boot_mode; /* early armv7 timer init: needed for polling */ timer_init(); #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD) dbgmcu_init(); #ifndef CONFIG_STM32MP1_TRUSTED security_init(); update_bootmode(); #endif #endif boot_mode = get_bootmode(); if ((boot_mode & TAMP_BOOT_DEVICE_MASK) == BOOT_SERIAL_UART) gd->flags |= GD_FLG_SILENT | GD_FLG_DISABLE_CONSOLE; #if defined(CONFIG_DEBUG_UART) && \ !defined(CONFIG_STM32MP1_TRUSTED) && \ (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)) else debug_uart_init(); #endif return 0; } void enable_caches(void) { /* Enable D-cache. I-cache is already enabled in start.S */ dcache_enable(); } static u32 read_idc(void) { setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN); return readl(DBGMCU_IDC); } u32 get_cpu_rev(void) { return (read_idc() & DBGMCU_IDC_REV_ID_MASK) >> DBGMCU_IDC_REV_ID_SHIFT; } static u32 get_otp(int index, int shift, int mask) { int ret; struct udevice *dev; u32 otp = 0; ret = uclass_get_device_by_driver(UCLASS_MISC, DM_GET_DRIVER(stm32mp_bsec), &dev); if (!ret) ret = misc_read(dev, STM32_BSEC_SHADOW(index), &otp, sizeof(otp)); return (otp >> shift) & mask; } /* Get Device Part Number (RPN) from OTP */ static u32 get_cpu_rpn(void) { return get_otp(BSEC_OTP_RPN, RPN_SHIFT, RPN_MASK); } u32 get_cpu_type(void) { u32 id; id = (read_idc() & DBGMCU_IDC_DEV_ID_MASK) >> DBGMCU_IDC_DEV_ID_SHIFT; return (id << 16) | get_cpu_rpn(); } /* Get Package options from OTP */ static u32 get_cpu_package(void) { return get_otp(BSEC_OTP_PKG, PKG_SHIFT, PKG_MASK); } #if defined(CONFIG_DISPLAY_CPUINFO) int print_cpuinfo(void) { char *cpu_s, *cpu_r, *pkg; /* MPUs Part Numbers */ switch (get_cpu_type()) { case CPU_STM32MP157Cxx: cpu_s = "157C"; break; case CPU_STM32MP157Axx: cpu_s = "157A"; break; case CPU_STM32MP153Cxx: cpu_s = "153C"; break; case CPU_STM32MP153Axx: cpu_s = "153A"; break; case CPU_STM32MP151Cxx: cpu_s = "151C"; break; case CPU_STM32MP151Axx: cpu_s = "151A"; break; default: cpu_s = "????"; break; } /* Package */ switch (get_cpu_package()) { case PKG_AA_LBGA448: pkg = "AA"; break; case PKG_AB_LBGA354: pkg = "AB"; break; case PKG_AC_TFBGA361: pkg = "AC"; break; case PKG_AD_TFBGA257: pkg = "AD"; break; default: pkg = "??"; break; } /* REVISION */ switch (get_cpu_rev()) { case CPU_REVA: cpu_r = "A"; break; case CPU_REVB: cpu_r = "B"; break; default: cpu_r = "?"; break; } printf("CPU: STM32MP%s%s Rev.%s\n", cpu_s, pkg, cpu_r); return 0; } #endif /* CONFIG_DISPLAY_CPUINFO */ static void setup_boot_mode(void) { const u32 serial_addr[] = { STM32_USART1_BASE, STM32_USART2_BASE, STM32_USART3_BASE, STM32_UART4_BASE, STM32_UART5_BASE, STM32_USART6_BASE, STM32_UART7_BASE, STM32_UART8_BASE }; char cmd[60]; u32 boot_ctx = readl(TAMP_BOOT_CONTEXT); u32 boot_mode = (boot_ctx & TAMP_BOOT_MODE_MASK) >> TAMP_BOOT_MODE_SHIFT; int instance = (boot_mode & TAMP_BOOT_INSTANCE_MASK) - 1; u32 forced_mode = (boot_ctx & TAMP_BOOT_FORCED_MASK); struct udevice *dev; int alias; pr_debug("%s: boot_ctx=0x%x => boot_mode=%x, instance=%d forced=%x\n", __func__, boot_ctx, boot_mode, instance, forced_mode); switch (boot_mode & TAMP_BOOT_DEVICE_MASK) { case BOOT_SERIAL_UART: if (instance > ARRAY_SIZE(serial_addr)) break; /* serial : search associated alias in devicetree */ sprintf(cmd, "serial@%x", serial_addr[instance]); if (uclass_get_device_by_name(UCLASS_SERIAL, cmd, &dev)) break; if (fdtdec_get_alias_seq(gd->fdt_blob, "serial", dev_of_offset(dev), &alias)) break; sprintf(cmd, "%d", alias); env_set("boot_device", "serial"); env_set("boot_instance", cmd); /* restore console on uart when not used */ if (gd->cur_serial_dev != dev) { gd->flags &= ~(GD_FLG_SILENT | GD_FLG_DISABLE_CONSOLE); printf("serial boot with console enabled!\n"); } break; case BOOT_SERIAL_USB: env_set("boot_device", "usb"); env_set("boot_instance", "0"); break; case BOOT_FLASH_SD: case BOOT_FLASH_EMMC: sprintf(cmd, "%d", instance); env_set("boot_device", "mmc"); env_set("boot_instance", cmd); break; case BOOT_FLASH_NAND: env_set("boot_device", "nand"); env_set("boot_instance", "0"); break; case BOOT_FLASH_NOR: env_set("boot_device", "nor"); env_set("boot_instance", "0"); break; default: pr_debug("unexpected boot mode = %x\n", boot_mode); break; } switch (forced_mode) { case BOOT_FASTBOOT: printf("Enter fastboot!\n"); env_set("preboot", "env set preboot; fastboot 0"); break; case BOOT_STM32PROG: env_set("boot_device", "usb"); env_set("boot_instance", "0"); break; case BOOT_UMS_MMC0: case BOOT_UMS_MMC1: case BOOT_UMS_MMC2: printf("Enter UMS!\n"); instance = forced_mode - BOOT_UMS_MMC0; sprintf(cmd, "env set preboot; ums 0 mmc %d", instance); env_set("preboot", cmd); break; case BOOT_RECOVERY: env_set("preboot", "env set preboot; run altbootcmd"); break; case BOOT_NORMAL: break; default: pr_debug("unexpected forced boot mode = %x\n", forced_mode); break; } /* clear TAMP for next reboot */ clrsetbits_le32(TAMP_BOOT_CONTEXT, TAMP_BOOT_FORCED_MASK, BOOT_NORMAL); } /* * If there is no MAC address in the environment, then it will be initialized * (silently) from the value in the OTP. */ static int setup_mac_address(void) { #if defined(CONFIG_NET) int ret; int i; u32 otp[2]; uchar enetaddr[6]; struct udevice *dev; /* MAC already in environment */ if (eth_env_get_enetaddr("ethaddr", enetaddr)) return 0; ret = uclass_get_device_by_driver(UCLASS_MISC, DM_GET_DRIVER(stm32mp_bsec), &dev); if (ret) return ret; ret = misc_read(dev, BSEC_OTP_MAC * 4 + STM32_BSEC_OTP_OFFSET, otp, sizeof(otp)); if (ret < 0) return ret; for (i = 0; i < 6; i++) enetaddr[i] = ((uint8_t *)&otp)[i]; if (!is_valid_ethaddr(enetaddr)) { pr_err("invalid MAC address in OTP %pM", enetaddr); return -EINVAL; } pr_debug("OTP MAC address = %pM\n", enetaddr); ret = !eth_env_set_enetaddr("ethaddr", enetaddr); if (!ret) pr_err("Failed to set mac address %pM from OTP: %d\n", enetaddr, ret); #endif return 0; } static int setup_serial_number(void) { char serial_string[25]; u32 otp[3] = {0, 0, 0 }; struct udevice *dev; int ret; if (env_get("serial#")) return 0; ret = uclass_get_device_by_driver(UCLASS_MISC, DM_GET_DRIVER(stm32mp_bsec), &dev); if (ret) return ret; ret = misc_read(dev, BSEC_OTP_SERIAL * 4 + STM32_BSEC_OTP_OFFSET, otp, sizeof(otp)); if (ret < 0) return ret; sprintf(serial_string, "%08X%08X%08X", otp[0], otp[1], otp[2]); env_set("serial#", serial_string); return 0; } int arch_misc_init(void) { setup_boot_mode(); setup_mac_address(); setup_serial_number(); return 0; }