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