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 <env.h>
13 #include <i2c.h>
14 #include "kp_id_rev.h"
15 #include <net.h>
16 #include <vsprintf.h>
17
18 static int eeprom_has_been_read;
19 static struct id_eeprom eeprom;
20
show_eeprom(void)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 #define I2C_EEPROM_BUS_NUM 1
68 #define I2C_EEPROM_ADDR 0x50
69 #define I2C_EEPROM_ADDR_LEN 2
70
read_eeprom(void)71 int read_eeprom(void)
72 {
73 struct udevice *dev;
74 int ret;
75
76 if (eeprom_has_been_read)
77 return 0;
78
79 ret = i2c_get_chip_for_busnum(I2C_EEPROM_BUS_NUM, I2C_EEPROM_ADDR,
80 I2C_EEPROM_ADDR_LEN, &dev);
81 if (ret) {
82 printf("Cannot find EEPROM !\n");
83 return ret;
84 }
85
86 ret = dm_i2c_read(dev, 0x0, (uchar *)&eeprom, sizeof(eeprom));
87
88 eeprom_has_been_read = (ret == 0) ? 1 : 0;
89 return ret;
90 }
91
read_board_id(void)92 int read_board_id(void)
93 {
94 unsigned char rev_id = 0x42;
95 char rev_str[32], buf[8];
96 struct udevice *dev;
97 int ret;
98
99 ret = i2c_get_chip_for_busnum(2, 0x22, 1, &dev);
100 if (ret) {
101 printf("Cannot find pcf8574 IO expander !\n");
102 return ret;
103 }
104
105 dm_i2c_read(dev, 0x0, &rev_id, sizeof(rev_id));
106
107 sprintf(rev_str, "%02X", rev_id);
108 if (rev_id & 0x80) {
109 printf("BBoard:4x00 Rev:%s\n", rev_str);
110 env_set("boardtype", "ddc");
111 env_set("fit_config", "imx53_kb_conf");
112 } else {
113 printf("BBoard:40x0 Rev:%s\n", rev_str);
114 env_set("boardtype", "hsc");
115 env_set("fit_config", "imx53_kb_40x0_conf");
116 }
117
118 sprintf(buf, "kp-%s", env_get("boardtype"));
119 env_set("boardname", buf);
120 env_set("boardsoc", "imx53");
121 env_set("kb53_rev", rev_str);
122
123 return 0;
124 }
125