+
+static void copy_or_generate_uuid(char *fd_ptr, const char *env_var_name)
+{
+ char str[UUID_STR_LEN + 1] = { 0 }; /* Enough for UUID stuff */
+ char *env;
+
+ /* Don't use the UUID dest place, as the \0 char won't fit */
+ env = env_get(env_var_name);
+ if (env)
+ strncpy(str, env, UUID_STR_LEN);
+ else
+ gen_rand_uuid_str(str, UUID_STR_FORMAT_STD);
+
+ memcpy(fd_ptr, str, UUID_STR_LEN);
+}
+
+/*
+ * Helper function to provide some sane factory-data values for testing
+ * purpose, when these values are not programmed correctly
+ */
+int do_fd_write(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
+{
+ struct factory_data_values *fd;
+ struct spi_flash *sf;
+ u8 *buf;
+ int ret = CMD_RET_FAILURE;
+
+ buf = malloc(FACTORY_DATA_SECT_SIZE);
+ if (!buf) {
+ printf("F-Data:Unable to allocate buffer\n");
+ return CMD_RET_FAILURE;
+ }
+
+ sf = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
+ CONFIG_SF_DEFAULT_CS,
+ CONFIG_SF_DEFAULT_SPEED,
+ CONFIG_SF_DEFAULT_MODE);
+ if (!sf) {
+ printf("F-Data:Unable to access SPI NOR flash\n");
+ goto err_free;
+ }
+
+ /* Generate the factory-data struct */
+
+ /* Fist read complete sector into buffer */
+ ret = spi_flash_read(sf, FACTORY_DATA_OFFS, FACTORY_DATA_SECT_SIZE,
+ (void *)buf);
+ if (ret) {
+ printf("F-Data:spi_flash_read failed (%d)\n", ret);
+ goto err_spi_flash;
+ }
+
+ fd = (struct factory_data_values *)buf;
+ fd->magic = FACTORY_DATA_MAGIC;
+ fd->version = 0x1;
+
+ /* Use existing MAC and UUID values or generate some random ones */
+ if (!eth_env_get_enetaddr("wifiaddr", fd->wifi_mac)) {
+ net_random_ethaddr(fd->wifi_mac);
+ /* to get a different seed value for the MAC address */
+ mdelay(10);
+ }
+
+ if (!eth_env_get_enetaddr("ethaddr", fd->eth_mac))
+ net_random_ethaddr(fd->eth_mac);
+
+ copy_or_generate_uuid(fd->ipr_id, "linuxmoduleid");
+ copy_or_generate_uuid(fd->hqv_id, "linuxmodulehqvid");
+ copy_or_generate_uuid(fd->unielec_id, "linuxmoduleunielecid");
+
+ printf("New factory-data values:\n");
+ printf("wifiaddr=%pM\n", fd->wifi_mac);
+ printf("ethaddr=%pM\n", fd->eth_mac);
+
+ /*
+ * We don't have the \0 char at the end, so we need to specify the
+ * length in the printf format instead
+ */
+ printf("linuxmoduleid=%." __stringify(UUID_STR_LEN) "s\n", fd->ipr_id);
+ printf("linuxmodulehqvid=%." __stringify(UUID_STR_LEN) "s\n",
+ fd->hqv_id);
+ printf("linuxmoduleunielecid=%." __stringify(UUID_STR_LEN) "s\n",
+ fd->unielec_id);
+
+ fd->crc = crc32(0, (u8 *)&fd->magic, FACTORY_DATA_CRC_LEN);
+
+ ret = spi_flash_erase(sf, FACTORY_DATA_OFFS, FACTORY_DATA_SECT_SIZE);
+ if (ret) {
+ printf("F-Data:spi_flash_erase failed (%d)\n", ret);
+ goto err_spi_flash;
+ }
+
+ ret = spi_flash_write(sf, FACTORY_DATA_OFFS, FACTORY_DATA_SECT_SIZE,
+ buf);
+ if (ret) {
+ printf("F-Data:spi_flash_write failed (%d)\n", ret);
+ goto err_spi_flash;
+ }
+
+ printf("F-Data:factory-data values written to SPI NOR flash\n");
+
+err_spi_flash:
+ spi_flash_free(sf);
+
+err_free:
+ free(buf);
+
+ return ret;
+}
+
+#ifndef CONFIG_SPL_BUILD
+U_BOOT_CMD(
+ fd_write, 1, 0, do_fd_write,
+ "Write test factory-data values to SPI NOR",
+ "\n"
+);
+#endif