arm: mvebu: turris_omnia: Show MCU version

There are already more MCU firmware versions for Turris Omnia in
production, so display git commit (version) of the MCU firmware during
U-Boot startup. It will help to identify what version of MCU firmware is
Turris Omnia using.

MCU firmware for Turris Omnia is open source and available at website:
https://gitlab.nic.cz/turris/hw/omnia_hw_ctrl

It can be updated from running system via i2c bus with this tool:
https://gitlab.nic.cz/turris/omnia-mcutool

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/board/CZ.NIC/turris_omnia/turris_omnia.c b/board/CZ.NIC/turris_omnia/turris_omnia.c
index 3eca08bafc6259aec85129abb438e52eecb398c2..ab5061ef582b660cac7150107da439c52b2ea9ce 100644 (file)
--- a/board/CZ.NIC/turris_omnia/turris_omnia.c
+++ b/board/CZ.NIC/turris_omnia/turris_omnia.c
@@ -21,6 +21,7 @@
 #include <dm/uclass.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <fdt_support.h>
+#include <hexdump.h>
 #include <time.h>
 #include <linux/bitops.h>
 #include <linux/delay.h>
@@ -61,7 +62,9 @@ DECLARE_GLOBAL_DATA_PTR;
 enum mcu_commands {
        CMD_GET_STATUS_WORD     = 0x01,
        CMD_GET_RESET           = 0x09,
+       CMD_GET_FW_VERSION_APP  = 0x0a,
        CMD_WATCHDOG_STATE      = 0x0b,
+       CMD_GET_FW_VERSION_BOOT = 0x0e,
 
        /* available if STS_FEATURES_SUPPORTED bit set in status word */
        CMD_GET_FEATURES        = 0x10,
@@ -418,6 +421,38 @@ static const char * const omnia_get_mcu_type(void)
        return mcu_types[stsword & STS_MCU_TYPE_MASK];
 }
 
+static const char * const omnia_get_mcu_version(void)
+{
+       static char version[82];
+       u8 version_app[20];
+       u8 version_boot[20];
+       int ret;
+
+       ret = omnia_mcu_read(CMD_GET_FW_VERSION_APP, &version_app, sizeof(version_app));
+       if (ret)
+               return "unknown";
+
+       ret = omnia_mcu_read(CMD_GET_FW_VERSION_BOOT, &version_boot, sizeof(version_boot));
+       if (ret)
+               return "unknown";
+
+       /*
+        * If git commits of MCU bootloader and MCU application are same then
+        * show version only once. If they are different then show both commits.
+        */
+       if (!memcmp(version_app, version_boot, 20)) {
+               bin2hex(version, version_app, 20);
+               version[40] = '\0';
+       } else {
+               bin2hex(version, version_boot, 20);
+               version[40] = '/';
+               bin2hex(version + 41, version_app, 20);
+               version[81] = '\0';
+       }
+
+       return version;
+}
+
 /*
  * Define the DDR layout / topology here in the board file. This will
  * be used by the DDR3 init code in the SPL U-Boot version to configure
@@ -934,6 +969,7 @@ int show_board_info(void)
        err = turris_atsha_otp_get_serial_number(&version_num, &serial_num);
        printf("Model: Turris Omnia\n");
        printf("  MCU type: %s\n", omnia_get_mcu_type());
+       printf("  MCU version: %s\n", omnia_get_mcu_version());
        printf("  RAM size: %i MiB\n", omnia_get_ram_size_gb() * 1024);
        if (err)
                printf("  Serial Number: unknown\n");