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
show_eeprom(void)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
read_eeprom(void)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
read_board_id(void)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