1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2018 4 * Lukasz Majewski, DENX Software Engineering, lukma (at) denx.de 5 * 6 * Based on code developed by: 7 * 8 * Copyright (C) 2012 TQ-Systems GmbH 9 * Daniel Gericke <daniel.gericke (at) 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 } 121
