Add necessary config options and board code to support board factory reset / rescue mode on Turris MOX.
In order to also support invoking rescue mode from U-Boot console, without having to press the factory reset button, put the rescue command into `bootcmd_rescue` default environment variable. When factory reset button is pressed, invoke rescue mode via distroboot by setting `boot_targets` to `rescue`.
Rescue boot from console can be invoked by running run bootcmd_rescue
Signed-off-by: Marek Behún marek.behun@nic.cz --- board/CZ.NIC/turris_mox/turris_mox.c | 71 ++++++++++++++++++++++++++++ configs/turris_mox_defconfig | 6 +++ include/configs/turris_mox.h | 9 ++++ 3 files changed, 86 insertions(+)
diff --git a/board/CZ.NIC/turris_mox/turris_mox.c b/board/CZ.NIC/turris_mox/turris_mox.c index 15cbf92550..a78f33661e 100644 --- a/board/CZ.NIC/turris_mox/turris_mox.c +++ b/board/CZ.NIC/turris_mox/turris_mox.c @@ -10,11 +10,13 @@ #include <asm/global_data.h> #include <asm/io.h> #include <asm/gpio.h> +#include <button.h> #include <clk.h> #include <dm.h> #include <env.h> #include <fdt_support.h> #include <init.h> +#include <led.h> #include <linux/delay.h> #include <linux/libfdt.h> #include <linux/string.h> @@ -44,6 +46,8 @@ #define SFP_GPIO_PATH "/soc/internal-regs@d0000000/spi@10600/moxtet@1/gpio@0" #define PCIE_PATH "/soc/pcie@d0070000" #define SFP_PATH "/sfp" +#define LED_PATH "/leds/led" +#define BUTTON_PATH "/gpio-keys/reset"
DECLARE_GLOBAL_DATA_PTR;
@@ -373,6 +377,71 @@ int misc_init_r(void) return 0; }
+static bool read_reset_button(void) +{ + struct udevice *button, *led; + int i; + + if (device_get_global_by_ofnode(ofnode_path(BUTTON_PATH), &button)) { + printf("Cannot find reset button!\n"); + return false; + } + + if (device_get_global_by_ofnode(ofnode_path(LED_PATH), &led)) { + printf("Cannot find status LED!\n"); + return false; + } + + led_set_state(led, LEDST_ON); + + for (i = 0; i < 21; ++i) { + if (button_get_state(button) != BUTTON_ON) + return false; + if (i < 20) + mdelay(50); + } + + led_set_state(led, LEDST_OFF); + + return true; +} + +static void handle_reset_button(void) +{ + if (read_reset_button()) { + const char * const vars[3] = { + "bootcmd", + "bootcmd_rescue", + "distro_bootcmd", + }; + + /* + * Set the above envs to their default values, in case the user + * managed to break them. + */ + env_set_default_vars(3, (char * const *)vars, 0); + + /* Ensure bootcmd_rescue is used by distroboot */ + env_set("boot_targets", "rescue"); + + printf("RESET button was pressed, overwriting boot_targets!\n"); + } else { + /* + * In case the user somehow managed to save environment with + * boot_targets=rescue, reset boot_targets to default value. + * This could happen in subsequent commands if bootcmd_rescue + * failed. + */ + if (!strcmp(env_get("boot_targets"), "rescue")) { + const char * const vars[1] = { + "boot_targets", + }; + + env_set_default_vars(1, (char * const *)vars, 0); + } + } +} + static void mox_print_info(void) { int ret, board_version, ram_size; @@ -543,6 +612,8 @@ int last_stage_init(void)
printf("\n");
+ handle_reset_button(); + return 0; }
diff --git a/configs/turris_mox_defconfig b/configs/turris_mox_defconfig index 75524babbc..d6d37a3d7d 100644 --- a/configs/turris_mox_defconfig +++ b/configs/turris_mox_defconfig @@ -23,10 +23,14 @@ CONFIG_SYS_CONSOLE_INFO_QUIET=y # CONFIG_DISPLAY_BOARDINFO is not set CONFIG_ARCH_EARLY_INIT_R=y CONFIG_MISC_INIT_R=y +CONFIG_BUTTON=y +CONFIG_BUTTON_GPIO=y +CONFIG_CMD_BUTTON=y CONFIG_CMD_CLK=y # CONFIG_CMD_FLASH is not set CONFIG_CMD_GPIO=y CONFIG_CMD_I2C=y +CONFIG_CMD_LED=y CONFIG_CMD_MMC=y CONFIG_CMD_PCI=y CONFIG_CMD_SPI=y @@ -46,6 +50,8 @@ CONFIG_CLK=y CONFIG_CLK_MVEBU=y # CONFIG_MVEBU_GPIO is not set CONFIG_DM_I2C=y +CONFIG_LED=y +CONFIG_LED_GPIO=y CONFIG_MISC=y CONFIG_MMC_SDHCI=y CONFIG_MMC_SDHCI_SDMA=y diff --git a/include/configs/turris_mox.h b/include/configs/turris_mox.h index 51445ec60a..b148b1621a 100644 --- a/include/configs/turris_mox.h +++ b/include/configs/turris_mox.h @@ -75,12 +75,21 @@
#include <config_distro_bootcmd.h>
+#define TURRIS_MOX_BOOTCMD_RESCUE \ + "setenv bootargs "console=ttyMV0,115200 " \ + "earlycon=ar3700_uart,0xd0012000" && " \ + "sf probe && " \ + "sf read 0x5000000 0x190000 && " \ + "lzmadec 0x5000000 0x5800000 && " \ + "bootm 0x5800000" + #define CONFIG_EXTRA_ENV_SETTINGS \ "scriptaddr=0x4d00000\0" \ "pxefile_addr_r=0x4e00000\0" \ "fdt_addr_r=0x4f00000\0" \ "kernel_addr_r=0x5000000\0" \ "ramdisk_addr_r=0x8000000\0" \ + "bootcmd_rescue=" TURRIS_MOX_BOOTCMD_RESCUE "\0" \ BOOTENV
#endif /* _CONFIG_TURRIS_MOX_H */