/*
   * smarcfimx6.h
   *
   * Embedian SMARC-FiMX6 boards information header
   *
   * Copyright (C) 2015, Embedian, Inc. - http://www.embedian.com/
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #ifndef _SMARCFIMX6_H_
  #define _SMARCFIMX6_H_
  
  /*
  * SMARC-FiMX6 Config held in module eeprom device.
  *
  * Header Format
  *
  *  Name                 Size            Contents
  *                       (Bytes)
  *-------------------------------------------------------------
  *  Header               4       0xAA, 0x55, 0x33, 0xEE
  *
  *  Board Name           8       Name for board in ASCII.
  *                               example "FIMX6Q1G" = "SMARC-FiMX6
  *                               Quad Core and 1GB DDR3 memory"
  *
  *  Version              4       Hardware version code for board in
  *                               in ASCII. "00A0" = rev.0A
  *  Serial Number        12      Serial number of the board. This is a 12
  *                               character string which is: WWYYMSkknnnn, where
  *                               WW = 2 digit week of the year of production
  *                               YY = 2 digit year of production
  *				kk = 2 digit module variants
  *                               nnnn = incrementing board number
  *  Configuration Option 32      Codes to show the configuration
  *                               setup on this board.
  *  MAC Address (LAN1)		MAC Address for FEC controller
  *  MAC Address (LAN2, if any)	MAC Address for 2nd LAN (if any)
  *  Available    32700           Available space for other non-volatile
  *                               codes/data
  */
  
  #define HDR_NO_OF_MAC_ADDR	3
  #define HDR_ETH_ALEN		6
  #define HDR_NAME_LEN		8
  
  struct smarcfimx6_id {
  	unsigned int  magic;
  	char name[HDR_NAME_LEN];
  	char version[4];
  	char serial[12];
  	char config[32];
  	char mac_addr[HDR_NO_OF_MAC_ADDR][HDR_ETH_ALEN];
  };
  
  static inline int board_is_fimx6slo(struct smarcfimx6_id *header)
  {
          return !strncmp(header->name, "SMCMXSLO", HDR_NAME_LEN);
  }
  
  static inline int board_is_fimx6u1g(struct smarcfimx6_id *header)
  {
          return !strncmp(header->name, "SMCMXU1G", HDR_NAME_LEN);
  }
  
  static inline int board_is_fimx6d1g(struct smarcfimx6_id *header)
  {
          return !strncmp(header->name, "SMCMXD1G", HDR_NAME_LEN);
  }
  
  static inline int board_is_fimx6d2g(struct smarcfimx6_id *header)
  {
  	return !strncmp(header->name, "SMCMXD2G", HDR_NAME_LEN);
  }
  
  static inline int board_is_fimx6q1g(struct smarcfimx6_id *header)
  {
          return !strncmp(header->name, "SMCMXQ1G", HDR_NAME_LEN);
  }
  
  static inline int board_is_fimx6q2g(struct smarcfimx6_id *header)
  {
          return !strncmp(header->name, "SMCMXQ2G", HDR_NAME_LEN);
  }

  static inline int revision_is_00a0(struct smarcfimx6_id *header)
  {
          return !strncmp(header->version, "00A0", 4);
  }
  
  static inline int revision_is_00b0(struct smarcfimx6_id *header)
  {
          return !strncmp(header->version, "00B0", 4);
  }
  
  static inline int revision_is_00c0(struct smarcfimx6_id *header)
  {
          return !strncmp(header->version, "00C0", 4);
  }

  /*
   * Read ethernet MAC address from EEPROM for SMARC-FiMX6DVEVM compatible boards.
   * Returns 1 if found, 0 otherwise.
   */
  int smarcfimx6_read_mac_address(uint8_t *buf)
  {
  #ifdef CONFIG_SYS_I2C_EEPROM_ADDR
          /* Read MAC address. */
  	i2c_set_bus_num(0);
          if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0x3C,
                  CONFIG_SYS_I2C_EEPROM_ADDR_LEN, (uint8_t *) &buf[0], 6))
                  goto i2cerr;
  
          /* Check that MAC address is valid. */
          if (!is_valid_ether_addr(buf))
                  goto err;
  
          return 1; /* Found */
  
  i2cerr:
          printf("Read from EEPROM @ 0x%02x failed
  ",
                  CONFIG_SYS_I2C_EEPROM_ADDR);
  err:
  #endif /* CONFIG_SYS_I2C_EEPROM_ADDR */
  
          return 0;
  }
  
  /*
   * If there is no MAC address in the environment, then it will be initialized
   * (silently) from the value in the EEPROM.
   */
  void smarcfimx6_sync_env_enetaddr(uint8_t *rom_enetaddr)
  {
          uint8_t env_enetaddr[6];
          int ret;
  
          ret = eth_getenv_enetaddr_by_index("eth", 0, env_enetaddr);
          if (!ret) {
                  /*
                   * There is no MAC address in the environment, so we
                   * initialize it from the value in the EEPROM.
                   */
                  debug("### Setting environment from EEPROM MAC address = "
                          "\"%pM\"
  ",
                          env_enetaddr);
                  ret = !eth_setenv_enetaddr("ethaddr", rom_enetaddr);
          }
          if (!ret)
                  printf("Failed to set mac address from EEPROM: %d
  ", ret);
  }
  
  #endif