1 // SPDX-License-Identifier: GPL-2.0+
4 * Corscience GmbH & Co. KG, <www.corscience.de>
5 * Andreas Bießmann <andreas.biessmann@corscience.de>
11 #include <u-boot/crc.h>
13 #include "tricorder-eeprom.h"
15 static inline void warn_wrong_value(const char *msg, unsigned int a,
18 printf("Expected EEPROM %s %08x, got %08x\n", msg, a, b);
21 static int handle_eeprom_v0(struct tricorder_eeprom *eeprom)
23 struct tricorder_eeprom_v0 {
27 char board_name[TRICORDER_BOARD_NAME_LENGTH];
28 char board_version[TRICORDER_BOARD_VERSION_LENGTH];
29 char board_serial[TRICORDER_BOARD_SERIAL_LENGTH];
34 printf("Old EEPROM (v0), consider rewrite!\n");
36 if (be16_to_cpu(eeprom->length) != sizeof(eepromv0)) {
37 warn_wrong_value("length", sizeof(eepromv0),
38 be16_to_cpu(eeprom->length));
42 memcpy(&eepromv0, eeprom, sizeof(eepromv0));
44 crc = crc32(0L, (unsigned char *)&eepromv0,
45 sizeof(eepromv0) - sizeof(eepromv0.crc32));
46 if (be32_to_cpu(eepromv0.crc32) != crc) {
47 warn_wrong_value("CRC", be32_to_cpu(eepromv0.crc32),
52 /* Ok the content is correct, do the conversion */
53 memset(eeprom->interface_version, 0x0,
54 TRICORDER_INTERFACE_VERSION_LENGTH);
55 crc = crc32(0L, (unsigned char *)eeprom, TRICORDER_EEPROM_CRC_SIZE);
56 eeprom->crc32 = cpu_to_be32(crc);
61 static int handle_eeprom_v1(struct tricorder_eeprom *eeprom)
65 if (be16_to_cpu(eeprom->length) != TRICORDER_EEPROM_SIZE) {
66 warn_wrong_value("length", TRICORDER_EEPROM_SIZE,
67 be16_to_cpu(eeprom->length));
71 crc = crc32(0L, (unsigned char *)eeprom, TRICORDER_EEPROM_CRC_SIZE);
72 if (be32_to_cpu(eeprom->crc32) != crc) {
73 warn_wrong_value("CRC", be32_to_cpu(eeprom->crc32), crc);
80 int tricorder_get_eeprom(int addr, struct tricorder_eeprom *eeprom)
82 unsigned int bus = i2c_get_bus_num();
83 i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM);
85 memset(eeprom, 0, TRICORDER_EEPROM_SIZE);
87 i2c_read(addr, 0, 2, (unsigned char *)eeprom, TRICORDER_EEPROM_SIZE);
90 if (be32_to_cpu(eeprom->magic) != TRICORDER_EEPROM_MAGIC) {
91 warn_wrong_value("magic", TRICORDER_EEPROM_MAGIC,
92 be32_to_cpu(eeprom->magic));
96 switch (be16_to_cpu(eeprom->version)) {
98 return handle_eeprom_v0(eeprom);
100 return handle_eeprom_v1(eeprom);
102 warn_wrong_value("version", TRICORDER_EEPROM_VERSION,
103 be16_to_cpu(eeprom->version));
108 #if !defined(CONFIG_SPL)
109 int tricorder_eeprom_read(unsigned devaddr)
111 struct tricorder_eeprom eeprom;
112 int ret = tricorder_get_eeprom(devaddr, &eeprom);
117 printf("Board type: %.*s\n",
118 sizeof(eeprom.board_name), eeprom.board_name);
119 printf("Board version: %.*s\n",
120 sizeof(eeprom.board_version), eeprom.board_version);
121 printf("Board serial: %.*s\n",
122 sizeof(eeprom.board_serial), eeprom.board_serial);
123 printf("Board interface version: %.*s\n",
124 sizeof(eeprom.interface_version),
125 eeprom.interface_version);
130 int tricorder_eeprom_write(unsigned devaddr, const char *name,
131 const char *version, const char *serial, const char *interface)
133 struct tricorder_eeprom eeprom, eeprom_verify;
140 memset(eeprom, 0, TRICORDER_EEPROM_SIZE);
141 memset(eeprom_verify, 0, TRICORDER_EEPROM_SIZE);
143 eeprom.magic = cpu_to_be32(TRICORDER_EEPROM_MAGIC);
144 eeprom.length = cpu_to_be16(TRICORDER_EEPROM_SIZE);
145 eeprom.version = cpu_to_be16(TRICORDER_EEPROM_VERSION);
147 length = min(sizeof(eeprom.board_name), strlen(name));
148 strncpy(eeprom.board_name, name, length);
150 length = min(sizeof(eeprom.board_version), strlen(version));
151 strncpy(eeprom.board_version, version, length);
153 length = min(sizeof(eeprom.board_serial), strlen(serial));
154 strncpy(eeprom.board_serial, serial, length);
157 length = min(sizeof(eeprom.interface_version),
159 strncpy(eeprom.interface_version, interface, length);
162 crc = crc32(0L, (unsigned char *)&eeprom, TRICORDER_EEPROM_CRC_SIZE);
163 eeprom.crc32 = cpu_to_be32(crc);
166 puts("Tricorder EEPROM content:\n");
167 print_buffer(0, &eeprom, 1, sizeof(eeprom), 16);
170 eeprom_init(CONFIG_SYS_EEPROM_BUS_NUM);
172 ret = eeprom_write(devaddr, 0, (unsigned char *)&eeprom,
173 TRICORDER_EEPROM_SIZE);
175 printf("Tricorder: Could not write EEPROM content!\n");
177 ret = eeprom_read(devaddr, 0, (unsigned char *)&eeprom_verify,
178 TRICORDER_EEPROM_SIZE);
180 printf("Tricorder: Could not read EEPROM content!\n");
182 if (memcmp(&eeprom, &eeprom_verify, sizeof(eeprom)) != 0) {
183 printf("Tricorder: Could not verify EEPROM content!\n");
190 int do_tricorder_eeprom(struct cmd_tbl *cmdtp, int flag, int argc, char *argv[])
193 ulong dev_addr = simple_strtoul(argv[2], NULL, 16);
195 if (strcmp(argv[1], "read") == 0)
196 return tricorder_eeprom_read(dev_addr);
197 } else if (argc == 6 || argc == 7) {
198 ulong dev_addr = simple_strtoul(argv[2], NULL, 16);
199 char *name = argv[3];
200 char *version = argv[4];
201 char *serial = argv[5];
202 char *interface = NULL;
207 if (strcmp(argv[1], "write") == 0)
208 return tricorder_eeprom_write(dev_addr, name, version,
212 return CMD_RET_USAGE;
216 tricordereeprom, 7, 1, do_tricorder_eeprom,
219 " - read Tricorder EEPROM at devaddr and print content\n"
220 "tricordereeprom write devaddr name version serial [interface]\n"
221 " - write Tricorder EEPROM at devaddr with 'name', 'version'"
223 " optional add an HW interface parameter"
225 #endif /* CONFIG_SPL */