arm: stm32mp: add boot_mode support for STM32MP25
Add support of all the boot mode supported by STM32MP25x family
with information provided by TF-A in backup register
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/arch/arm/mach-stm32mp/stm32mp2/cpu.c b/arch/arm/mach-stm32mp/stm32mp2/cpu.c
index 9530aa8..7cb71c5 100644
--- a/arch/arm/mach-stm32mp/stm32mp2/cpu.c
+++ b/arch/arm/mach-stm32mp/stm32mp2/cpu.c
@@ -67,14 +67,6 @@
dcache_enable();
}
-int arch_misc_init(void)
-{
- setup_serial_number();
- setup_mac_address();
-
- return 0;
-}
-
/*
* Force data-section, as .bss will not be valid
* when save_boot_params is invoked.
@@ -97,3 +89,150 @@
save_boot_params_ret();
}
+
+u32 get_bootmode(void)
+{
+ /* read bootmode from TAMP backup register */
+ return (readl(TAMP_BOOT_CONTEXT) & TAMP_BOOT_MODE_MASK) >>
+ TAMP_BOOT_MODE_SHIFT;
+}
+
+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,
+ STM32_UART9_BASE
+ };
+ const u32 sdmmc_addr[] = {
+ STM32_SDMMC1_BASE,
+ STM32_SDMMC2_BASE,
+ STM32_SDMMC3_BASE
+ };
+ char cmd[60];
+ u32 boot_ctx = readl(TAMP_BOOT_CONTEXT);
+ u32 boot_mode =
+ (boot_ctx & TAMP_BOOT_MODE_MASK) >> TAMP_BOOT_MODE_SHIFT;
+ unsigned int instance = (boot_mode & TAMP_BOOT_INSTANCE_MASK) - 1;
+ u32 forced_mode = (boot_ctx & TAMP_BOOT_FORCED_MASK);
+ struct udevice *dev;
+
+ log_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 node in devicetree */
+ sprintf(cmd, "serial@%x", serial_addr[instance]);
+ if (uclass_get_device_by_name(UCLASS_SERIAL, cmd, &dev)) {
+ /* restore console on error */
+ if (IS_ENABLED(CONFIG_CMD_STM32PROG_SERIAL))
+ gd->flags &= ~(GD_FLG_SILENT |
+ GD_FLG_DISABLE_CONSOLE);
+ log_err("uart%d = %s not found in device tree!\n",
+ instance + 1, cmd);
+ break;
+ }
+ sprintf(cmd, "%d", dev_seq(dev));
+ env_set("boot_device", "serial");
+ env_set("boot_instance", cmd);
+
+ /* restore console on uart when not used */
+ if (IS_ENABLED(CONFIG_CMD_STM32PROG_SERIAL) && gd->cur_serial_dev != dev) {
+ gd->flags &= ~(GD_FLG_SILENT |
+ GD_FLG_DISABLE_CONSOLE);
+ log_info("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:
+ if (instance > ARRAY_SIZE(sdmmc_addr))
+ break;
+ /* search associated sdmmc node in devicetree */
+ sprintf(cmd, "mmc@%x", sdmmc_addr[instance]);
+ if (uclass_get_device_by_name(UCLASS_MMC, cmd, &dev)) {
+ printf("mmc%d = %s not found in device tree!\n",
+ instance, cmd);
+ break;
+ }
+ sprintf(cmd, "%d", dev_seq(dev));
+ 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_SPINAND:
+ env_set("boot_device", "spi-nand");
+ env_set("boot_instance", "0");
+ break;
+ case BOOT_FLASH_NOR:
+ env_set("boot_device", "nor");
+ if (IS_ENABLED(CONFIG_SYS_MAX_FLASH_BANKS))
+ sprintf(cmd, "%d", CONFIG_SYS_MAX_FLASH_BANKS);
+ else
+ sprintf(cmd, "%d", 0);
+ env_set("boot_instance", cmd);
+ break;
+ case BOOT_FLASH_HYPERFLASH:
+ env_set("boot_device", "nor");
+ env_set("boot_instance", "0");
+ break;
+ default:
+ env_set("boot_device", "invalid");
+ env_set("boot_instance", "");
+ log_err("unexpected boot mode = %x\n", boot_mode);
+ break;
+ }
+
+ switch (forced_mode) {
+ case BOOT_FASTBOOT:
+ log_info("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:
+ log_info("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:
+ log_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);
+}
+
+int arch_misc_init(void)
+{
+ setup_boot_mode();
+ setup_serial_number();
+ setup_mac_address();
+
+ return 0;
+}