1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
8 #include <debug_uart.h>
15 #include <asm/arch/stm32.h>
16 #include <asm/arch/sys_proto.h>
17 #include <dm/device.h>
18 #include <dm/uclass.h>
19 #include <linux/bitops.h>
22 #define RCC_TZCR (STM32_RCC_BASE + 0x00)
23 #define RCC_DBGCFGR (STM32_RCC_BASE + 0x080C)
24 #define RCC_BDCR (STM32_RCC_BASE + 0x0140)
25 #define RCC_MP_APB5ENSETR (STM32_RCC_BASE + 0x0208)
26 #define RCC_MP_AHB5ENSETR (STM32_RCC_BASE + 0x0210)
27 #define RCC_BDCR_VSWRST BIT(31)
28 #define RCC_BDCR_RTCSRC GENMASK(17, 16)
29 #define RCC_DBGCFGR_DBGCKEN BIT(8)
31 /* Security register */
32 #define ETZPC_TZMA1_SIZE (STM32_ETZPC_BASE + 0x04)
33 #define ETZPC_DECPROT0 (STM32_ETZPC_BASE + 0x10)
35 #define TZC_GATE_KEEPER (STM32_TZC_BASE + 0x008)
36 #define TZC_REGION_ATTRIBUTE0 (STM32_TZC_BASE + 0x110)
37 #define TZC_REGION_ID_ACCESS0 (STM32_TZC_BASE + 0x114)
39 #define TAMP_CR1 (STM32_TAMP_BASE + 0x00)
41 #define PWR_CR1 (STM32_PWR_BASE + 0x00)
42 #define PWR_MCUCR (STM32_PWR_BASE + 0x14)
43 #define PWR_CR1_DBP BIT(8)
44 #define PWR_MCUCR_SBF BIT(6)
47 #define DBGMCU_IDC (STM32_DBGMCU_BASE + 0x00)
48 #define DBGMCU_APB4FZ1 (STM32_DBGMCU_BASE + 0x2C)
49 #define DBGMCU_APB4FZ1_IWDG2 BIT(2)
50 #define DBGMCU_IDC_DEV_ID_MASK GENMASK(11, 0)
51 #define DBGMCU_IDC_DEV_ID_SHIFT 0
52 #define DBGMCU_IDC_REV_ID_MASK GENMASK(31, 16)
53 #define DBGMCU_IDC_REV_ID_SHIFT 16
56 #define GPIOZ_SECCFGR 0x54004030
58 /* boot interface from Bootrom
59 * - boot instance = bit 31:16
60 * - boot device = bit 15:0
62 #define BOOTROM_PARAM_ADDR 0x2FFC0078
63 #define BOOTROM_MODE_MASK GENMASK(15, 0)
64 #define BOOTROM_MODE_SHIFT 0
65 #define BOOTROM_INSTANCE_MASK GENMASK(31, 16)
66 #define BOOTROM_INSTANCE_SHIFT 16
68 /* Device Part Number (RPN) = OTP_DATA1 lower 8 bits */
70 #define RPN_MASK GENMASK(7, 0)
72 /* Package = bit 27:29 of OTP16
73 * - 100: LBGA448 (FFI) => AA = LFBGA 18x18mm 448 balls p. 0.8mm
74 * - 011: LBGA354 (LCI) => AB = LFBGA 16x16mm 359 balls p. 0.8mm
75 * - 010: TFBGA361 (FFC) => AC = TFBGA 12x12mm 361 balls p. 0.5mm
76 * - 001: TFBGA257 (LCC) => AD = TFBGA 10x10mm 257 balls p. 0.5mm
80 #define PKG_MASK GENMASK(2, 0)
83 * early TLB into the .data section so that it not get cleared
84 * with 16kB allignment (see TTBR0_BASE_ADDR_MASK)
86 u8 early_tlb[PGTABLE_SIZE] __section(".data") __aligned(0x4000);
88 #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)
89 #ifndef CONFIG_TFABOOT
90 static void security_init(void)
92 /* Disable the backup domain write protection */
93 /* the protection is enable at each reset by hardware */
94 /* And must be disable by software */
95 setbits_le32(PWR_CR1, PWR_CR1_DBP);
97 while (!(readl(PWR_CR1) & PWR_CR1_DBP))
100 /* If RTC clock isn't enable so this is a cold boot then we need
101 * to reset the backup domain
103 if (!(readl(RCC_BDCR) & RCC_BDCR_RTCSRC)) {
104 setbits_le32(RCC_BDCR, RCC_BDCR_VSWRST);
105 while (!(readl(RCC_BDCR) & RCC_BDCR_VSWRST))
107 clrbits_le32(RCC_BDCR, RCC_BDCR_VSWRST);
110 /* allow non secure access in Write/Read for all peripheral */
111 writel(GENMASK(25, 0), ETZPC_DECPROT0);
113 /* Open SYSRAM for no secure access */
114 writel(0x0, ETZPC_TZMA1_SIZE);
116 /* enable TZC1 TZC2 clock */
117 writel(BIT(11) | BIT(12), RCC_MP_APB5ENSETR);
119 /* Region 0 set to no access by default */
120 /* bit 0 / 16 => nsaid0 read/write Enable
121 * bit 1 / 17 => nsaid1 read/write Enable
123 * bit 15 / 31 => nsaid15 read/write Enable
125 writel(0xFFFFFFFF, TZC_REGION_ID_ACCESS0);
126 /* bit 30 / 31 => Secure Global Enable : write/read */
127 /* bit 0 / 1 => Region Enable for filter 0/1 */
128 writel(BIT(0) | BIT(1) | BIT(30) | BIT(31), TZC_REGION_ATTRIBUTE0);
130 /* Enable Filter 0 and 1 */
131 setbits_le32(TZC_GATE_KEEPER, BIT(0) | BIT(1));
133 /* RCC trust zone deactivated */
134 writel(0x0, RCC_TZCR);
136 /* TAMP: deactivate the internal tamper
137 * Bit 23 ITAMP8E: monotonic counter overflow
138 * Bit 20 ITAMP5E: RTC calendar overflow
139 * Bit 19 ITAMP4E: HSE monitoring
140 * Bit 18 ITAMP3E: LSE monitoring
141 * Bit 16 ITAMP1E: RTC power domain supply monitoring
143 writel(0x0, TAMP_CR1);
145 /* GPIOZ: deactivate the security */
146 writel(BIT(0), RCC_MP_AHB5ENSETR);
147 writel(0x0, GPIOZ_SECCFGR);
149 #endif /* CONFIG_TFABOOT */
154 static void dbgmcu_init(void)
156 setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN);
158 /* Freeze IWDG2 if Cortex-A7 is in debug mode */
159 setbits_le32(DBGMCU_APB4FZ1, DBGMCU_APB4FZ1_IWDG2);
161 #endif /* !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD) */
163 #if !defined(CONFIG_TFABOOT) && \
164 (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
165 /* get bootmode from ROM code boot context: saved in TAMP register */
166 static void update_bootmode(void)
169 u32 bootrom_itf = readl(BOOTROM_PARAM_ADDR);
170 u32 bootrom_device, bootrom_instance;
172 /* enable TAMP clock = RTCAPBEN */
173 writel(BIT(8), RCC_MP_APB5ENSETR);
175 /* read bootrom context */
177 (bootrom_itf & BOOTROM_MODE_MASK) >> BOOTROM_MODE_SHIFT;
179 (bootrom_itf & BOOTROM_INSTANCE_MASK) >> BOOTROM_INSTANCE_SHIFT;
181 ((bootrom_device << BOOT_TYPE_SHIFT) & BOOT_TYPE_MASK) |
182 ((bootrom_instance << BOOT_INSTANCE_SHIFT) &
185 /* save the boot mode in TAMP backup register */
186 clrsetbits_le32(TAMP_BOOT_CONTEXT,
188 boot_mode << TAMP_BOOT_MODE_SHIFT);
192 u32 get_bootmode(void)
194 /* read bootmode from TAMP backup register */
195 return (readl(TAMP_BOOT_CONTEXT) & TAMP_BOOT_MODE_MASK) >>
196 TAMP_BOOT_MODE_SHIFT;
200 * initialize the MMU and activate cache in SPL or in U-Boot pre-reloc stage
201 * MMU/TLB is updated in enable_caches() for U-Boot after relocation
202 * or is deactivated in U-Boot entry function start.S::cpu_init_cp15
204 static void early_enable_caches(void)
206 /* I-cache is already enabled in start.S: cpu_init_cp15 */
208 if (CONFIG_IS_ENABLED(SYS_DCACHE_OFF))
211 gd->arch.tlb_size = PGTABLE_SIZE;
212 gd->arch.tlb_addr = (unsigned long)&early_tlb;
216 if (IS_ENABLED(CONFIG_SPL_BUILD))
217 mmu_set_region_dcache_behaviour(STM32_SYSRAM_BASE,
219 DCACHE_DEFAULT_OPTION);
221 mmu_set_region_dcache_behaviour(STM32_DDR_BASE, STM32_DDR_SIZE,
222 DCACHE_DEFAULT_OPTION);
228 int arch_cpu_init(void)
232 early_enable_caches();
234 /* early armv7 timer init: needed for polling */
237 #if !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD)
239 #ifndef CONFIG_TFABOOT
243 /* Reset Coprocessor state unless it wakes up from Standby power mode */
244 if (!(readl(PWR_MCUCR) & PWR_MCUCR_SBF)) {
245 writel(TAMP_COPRO_STATE_OFF, TAMP_COPRO_STATE);
246 writel(0, TAMP_COPRO_RSC_TBL_ADDRESS);
250 boot_mode = get_bootmode();
252 if ((boot_mode & TAMP_BOOT_DEVICE_MASK) == BOOT_SERIAL_UART)
253 gd->flags |= GD_FLG_SILENT | GD_FLG_DISABLE_CONSOLE;
254 #if defined(CONFIG_DEBUG_UART) && \
255 !defined(CONFIG_TFABOOT) && \
256 (!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
264 void enable_caches(void)
266 /* I-cache is already enabled in start.S: icache_enable() not needed */
268 /* deactivate the data cache, early enabled in arch_cpu_init() */
271 * update MMU after relocation and enable the data cache
272 * warning: the TLB location udpated in board_f.c::reserve_mmu
277 static u32 read_idc(void)
279 setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN);
281 return readl(DBGMCU_IDC);
284 u32 get_cpu_dev(void)
286 return (read_idc() & DBGMCU_IDC_DEV_ID_MASK) >> DBGMCU_IDC_DEV_ID_SHIFT;
289 u32 get_cpu_rev(void)
291 return (read_idc() & DBGMCU_IDC_REV_ID_MASK) >> DBGMCU_IDC_REV_ID_SHIFT;
294 static u32 get_otp(int index, int shift, int mask)
300 ret = uclass_get_device_by_driver(UCLASS_MISC,
301 DM_GET_DRIVER(stm32mp_bsec),
305 ret = misc_read(dev, STM32_BSEC_SHADOW(index),
308 return (otp >> shift) & mask;
311 /* Get Device Part Number (RPN) from OTP */
312 static u32 get_cpu_rpn(void)
314 return get_otp(BSEC_OTP_RPN, RPN_SHIFT, RPN_MASK);
317 u32 get_cpu_type(void)
319 return (get_cpu_dev() << 16) | get_cpu_rpn();
322 /* Get Package options from OTP */
323 u32 get_cpu_package(void)
325 return get_otp(BSEC_OTP_PKG, PKG_SHIFT, PKG_MASK);
328 void get_soc_name(char name[SOC_NAME_SIZE])
330 char *cpu_s, *cpu_r, *pkg;
332 /* MPUs Part Numbers */
333 switch (get_cpu_type()) {
334 case CPU_STM32MP157Fxx:
337 case CPU_STM32MP157Dxx:
340 case CPU_STM32MP157Cxx:
343 case CPU_STM32MP157Axx:
346 case CPU_STM32MP153Fxx:
349 case CPU_STM32MP153Dxx:
352 case CPU_STM32MP153Cxx:
355 case CPU_STM32MP153Axx:
358 case CPU_STM32MP151Fxx:
361 case CPU_STM32MP151Dxx:
364 case CPU_STM32MP151Cxx:
367 case CPU_STM32MP151Axx:
376 switch (get_cpu_package()) {
383 case PKG_AC_TFBGA361:
386 case PKG_AD_TFBGA257:
395 switch (get_cpu_rev()) {
410 snprintf(name, SOC_NAME_SIZE, "STM32MP%s%s Rev.%s", cpu_s, pkg, cpu_r);
413 #if defined(CONFIG_DISPLAY_CPUINFO)
414 int print_cpuinfo(void)
416 char name[SOC_NAME_SIZE];
419 printf("CPU: %s\n", name);
423 #endif /* CONFIG_DISPLAY_CPUINFO */
425 static void setup_boot_mode(void)
427 const u32 serial_addr[] = {
438 u32 boot_ctx = readl(TAMP_BOOT_CONTEXT);
440 (boot_ctx & TAMP_BOOT_MODE_MASK) >> TAMP_BOOT_MODE_SHIFT;
441 unsigned int instance = (boot_mode & TAMP_BOOT_INSTANCE_MASK) - 1;
442 u32 forced_mode = (boot_ctx & TAMP_BOOT_FORCED_MASK);
446 pr_debug("%s: boot_ctx=0x%x => boot_mode=%x, instance=%d forced=%x\n",
447 __func__, boot_ctx, boot_mode, instance, forced_mode);
448 switch (boot_mode & TAMP_BOOT_DEVICE_MASK) {
449 case BOOT_SERIAL_UART:
450 if (instance > ARRAY_SIZE(serial_addr))
452 /* serial : search associated alias in devicetree */
453 sprintf(cmd, "serial@%x", serial_addr[instance]);
454 if (uclass_get_device_by_name(UCLASS_SERIAL, cmd, &dev))
456 if (fdtdec_get_alias_seq(gd->fdt_blob, "serial",
457 dev_of_offset(dev), &alias))
459 sprintf(cmd, "%d", alias);
460 env_set("boot_device", "serial");
461 env_set("boot_instance", cmd);
463 /* restore console on uart when not used */
464 if (gd->cur_serial_dev != dev) {
465 gd->flags &= ~(GD_FLG_SILENT |
466 GD_FLG_DISABLE_CONSOLE);
467 printf("serial boot with console enabled!\n");
470 case BOOT_SERIAL_USB:
471 env_set("boot_device", "usb");
472 env_set("boot_instance", "0");
475 case BOOT_FLASH_EMMC:
476 sprintf(cmd, "%d", instance);
477 env_set("boot_device", "mmc");
478 env_set("boot_instance", cmd);
480 case BOOT_FLASH_NAND:
481 env_set("boot_device", "nand");
482 env_set("boot_instance", "0");
484 case BOOT_FLASH_SPINAND:
485 env_set("boot_device", "spi-nand");
486 env_set("boot_instance", "0");
489 env_set("boot_device", "nor");
490 env_set("boot_instance", "0");
493 pr_debug("unexpected boot mode = %x\n", boot_mode);
497 switch (forced_mode) {
499 printf("Enter fastboot!\n");
500 env_set("preboot", "env set preboot; fastboot 0");
503 env_set("boot_device", "usb");
504 env_set("boot_instance", "0");
509 printf("Enter UMS!\n");
510 instance = forced_mode - BOOT_UMS_MMC0;
511 sprintf(cmd, "env set preboot; ums 0 mmc %d", instance);
512 env_set("preboot", cmd);
515 env_set("preboot", "env set preboot; run altbootcmd");
520 pr_debug("unexpected forced boot mode = %x\n", forced_mode);
524 /* clear TAMP for next reboot */
525 clrsetbits_le32(TAMP_BOOT_CONTEXT, TAMP_BOOT_FORCED_MASK, BOOT_NORMAL);
529 * If there is no MAC address in the environment, then it will be initialized
530 * (silently) from the value in the OTP.
532 __weak int setup_mac_address(void)
534 #if defined(CONFIG_NET)
541 /* MAC already in environment */
542 if (eth_env_get_enetaddr("ethaddr", enetaddr))
545 ret = uclass_get_device_by_driver(UCLASS_MISC,
546 DM_GET_DRIVER(stm32mp_bsec),
551 ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_MAC),
556 for (i = 0; i < 6; i++)
557 enetaddr[i] = ((uint8_t *)&otp)[i];
559 if (!is_valid_ethaddr(enetaddr)) {
560 pr_err("invalid MAC address in OTP %pM\n", enetaddr);
563 pr_debug("OTP MAC address = %pM\n", enetaddr);
564 ret = !eth_env_set_enetaddr("ethaddr", enetaddr);
566 pr_err("Failed to set mac address %pM from OTP: %d\n",
573 static int setup_serial_number(void)
575 char serial_string[25];
576 u32 otp[3] = {0, 0, 0 };
580 if (env_get("serial#"))
583 ret = uclass_get_device_by_driver(UCLASS_MISC,
584 DM_GET_DRIVER(stm32mp_bsec),
589 ret = misc_read(dev, STM32_BSEC_SHADOW(BSEC_OTP_SERIAL),
594 sprintf(serial_string, "%08X%08X%08X", otp[0], otp[1], otp[2]);
595 env_set("serial#", serial_string);
600 int arch_misc_init(void)
604 setup_serial_number();