board/k+p/kp_imx53/kp_id_rev.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2018
   4  * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
   5  *
   6  * Based on code developed by:
   7  *
   8  * Copyright (C) 2012 TQ-Systems GmbH
   9  * Daniel Gericke <daniel.gericke@tqs.de>
  10  */
  11
  12 #include <common.h>
  13 #include <env.h>
  14 #include <environment.h>
  15 #include <i2c.h>
  16 #include "kp_id_rev.h"
  17
  18 static int eeprom_has_been_read;
  19 static struct id_eeprom eeprom;
  20
  21 void show_eeprom(void)
  22 {
  23         char safe_string[33];
  24         int i;
  25         u8 *p;
  26
  27         puts("Module EEPROM:\n");
  28         /* ID */
  29         for (i = 0; i <= sizeof(eeprom.id) && 0xff != eeprom.id[i]; ++i)
  30                 safe_string[i] = eeprom.id[i];
  31         safe_string[i] = '\0';
  32
  33         if (!strncmp(safe_string, "TQM", 3)) {
  34                 printf("  ID: %s\n", safe_string);
  35                 env_set("boardtype", safe_string);
  36         } else {
  37                 puts("  unknown hardware variant\n");
  38         }
  39
  40         /* Serial number */
  41         for (i = 0; (sizeof(eeprom.serial) >= i) &&
  42                     (eeprom.serial[i] >= 0x30) &&
  43                     (eeprom.serial[i] <= 0x39); ++i)
  44                 safe_string[i] = eeprom.serial[i];
  45         safe_string[i] = '\0';
  46
  47         if (strlen(safe_string) == 8) {
  48                 printf("  SN: %s\n", safe_string);
  49                 env_set("serial#", safe_string);
  50         } else {
  51                 puts("  unknown serial number\n");
  52         }
  53
  54         /* MAC address  */
  55         p = eeprom.mac;
  56         if (!is_valid_ethaddr(p)) {
  57                 printf("  Not valid ETH EEPROM addr!\n");
  58                 return;
  59         }
  60
  61         printf("  MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
  62                p[0], p[1], p[2], p[3], p[4], p[5]);
  63
  64         eth_env_set_enetaddr("ethaddr", p);
  65 }
  66
  67 int read_eeprom(void)
  68 {
  69         struct udevice *dev;
  70         int ret;
  71
  72         if (eeprom_has_been_read)
  73                 return 0;
  74
  75         ret = i2c_get_chip_for_busnum(CONFIG_SYS_EEPROM_BUS_NUM,
  76                                       CONFIG_SYS_I2C_EEPROM_ADDR,
  77                                       CONFIG_SYS_I2C_EEPROM_ADDR_LEN, &dev);
  78         if (ret) {
  79                 printf("Cannot find EEPROM !\n");
  80                 return ret;
  81         }
  82
  83         ret = dm_i2c_read(dev, 0x0, (uchar *)&eeprom, sizeof(eeprom));
  84
  85         eeprom_has_been_read = (ret == 0) ? 1 : 0;
  86         return ret;
  87 }
  88
  89 int read_board_id(void)
  90 {
  91         unsigned char rev_id = 0x42;
  92         char rev_str[32], buf[8];
  93         struct udevice *dev;
  94         int ret;
  95
  96         ret = i2c_get_chip_for_busnum(2, 0x22, 1, &dev);
  97         if (ret) {
  98                 printf("Cannot find pcf8574 IO expander !\n");
  99                 return ret;
 100         }
 101
 102         dm_i2c_read(dev, 0x0, &rev_id, sizeof(rev_id));
 103
 104         sprintf(rev_str, "%02X", rev_id);
 105         if (rev_id & 0x80) {
 106                 printf("BBoard:4x00 Rev:%s\n", rev_str);
 107                 env_set("boardtype", "ddc");
 108                 env_set("fit_config", "imx53_kb_conf");
 109         } else {
 110                 printf("BBoard:40x0 Rev:%s\n", rev_str);
 111                 env_set("boardtype", "hsc");
 112                 env_set("fit_config", "imx53_kb_40x0_conf");
 113         }
 114
 115         sprintf(buf, "kp-%s", env_get("boardtype"));
 116         env_set("boardname", buf);
 117         env_set("boardsoc", "imx53");
 118         env_set("kb53_rev", rev_str);
 119
 120         return 0;
 121 }