1 // SPDX-License-Identifier: GPL-2.0+
3  * Copyright 2006, 2008-2009, 2011 Freescale Semiconductor
20 /* some boards with non-256-bytes EEPROM have special define */
21 /* for MAX_NUM_PORTS in board-specific file */
35 	u8 id[4];         /* 0x00 - 0x03 EEPROM Tag 'CCID' */
38 	u8 sn[10];        /* 0x06 - 0x0F Serial Number*/
39 	u8 errata[2];     /* 0x10 - 0x11 Errata Level */
40 	u8 date[6];       /* 0x12 - 0x17 Build Date */
41 	u8 res_0[40];     /* 0x18 - 0x3f Reserved */
42 	u8 mac_count;     /* 0x40        Number of MAC addresses */
43 	u8 mac_flag;      /* 0x41        MAC table flags */
44 	u8 mac[MAX_NUM_PORTS][6];     /* 0x42 - 0x71 MAC addresses */  member
48 	u8 id[4];         /* 0x00 - 0x03 EEPROM Tag 'NXID' */
49 	u8 sn[12];        /* 0x04 - 0x0F Serial Number */
50 	u8 errata[5];     /* 0x10 - 0x14 Errata Level */
51 	u8 date[6];       /* 0x15 - 0x1a Build Date */
53 	u32 version;      /* 0x1c - 0x1f NXID Version */
54 	u8 tempcal[8];    /* 0x20 - 0x27 Temperature Calibration Factors */
55 	u8 tempcalsys[2]; /* 0x28 - 0x29 System Temperature Calibration Factors */
57 	u8 res_1[21];     /* 0x2b - 0x3f Reserved */
58 	u8 mac_count;     /* 0x40        Number of MAC addresses */
59 	u8 mac_flag;      /* 0x41        MAC table flags */
60 	u8 mac[MAX_NUM_PORTS][6];     /* 0x42 - 0xa1 MAC addresses */  member
61 	u8 res_2[90];     /* 0xa2 - 0xfb Reserved */	
62 	u32 crc;          /* 0xfc - 0xff CRC32 checksum */
82  * show_eeprom - display the contents of the EEPROM
115 	/* Show MAC addresses  */  in show_eeprom()
118 		u8 *p = e.mac[i];  in show_eeprom()
124 	crc = crc32(0, (void *)&e, sizeof(e) - 4);  in show_eeprom()
138 		if (((i % 16) == 15) || (i == sizeof(e) - 1))  in show_eeprom()
145  * read_eeprom - read the EEPROM into memory
179  *  update_crc - update the CRC
188 	crc = crc32(0, (void *)&e, sizeof(e) - 4);  in update_crc()
193  * prog_eeprom - write the EEPROM from memory
219 	 * The AT24C02 datasheet says that data can only be written in page  in prog_eeprom()
225 				p, min((int)(sizeof(e) - i), 8));  in prog_eeprom()
238 			ret = -1;  in prog_eeprom()
248 		return -1;  in prog_eeprom()
256  * h2i - converts hex character into a number
264 		return p - '0';  in h2i()
267 		return (p - 'A') + 10;  in h2i()
270 		return (p - 'a') + 10;  in h2i()
276  * set_date - stores the build date into the EEPROM
279  * (2-digit year, 2-digit month, etc), converts it to a 6-byte BCD string,
287 		printf("Usage: mac date YYMMDDhhmmss\n");  in set_date()
298  * set_mac_address - stores a MAC address into the EEPROM
300  * This function takes a pointer to MAC address string
301  * (i.e."XX:XX:XX:XX:XX:XX", where "XX" is a two-digit hex number) and
302  * stores it in one of the MAC address fields of the EEPROM local copy.
310 		printf("Usage: mac <n> XX:XX:XX:XX:XX:XX\n");  in set_mac_address()
315 		e.mac[index][i] = simple_strtoul(p, &p, 16);  in set_mac_address()
372 		strncpy((char *)e.sn, argv[2], sizeof(e.sn) - 1);  in do_mac()
388 	case 'p':	/* MAC table size */  in do_mac()
392 	case '0' ... '9':	/* "mac 0" through "mac 22" */  in do_mac()
404  * mac_read_from_eeprom - read the MAC addresses from EEPROM
406  * This function reads the MAC addresses from EEPROM and sets the
409  * The environment variables are only set if they haven't been set already.
410  * This ensures that any user-saved variables are never overwritten.
414  * For NXID v1 EEPROMs, we support loading and up-converting the older NXID v0
415  * format.  In a v0 EEPROM, there are only eight MAC addresses and the CRC is
455 	 * MAC address #9 in v1 occupies the same position as the CRC in v0.  in mac_read_from_eeprom()
456 	 * Erase it so that it's not mistaken for a MAC address.  We'll  in mac_read_from_eeprom()
460 		memset(e.mac[8], 0xff, 6);  in mac_read_from_eeprom()
464 		if (memcmp(&e.mac[i], "\0\0\0\0\0\0", 6) &&  in mac_read_from_eeprom()
465 		    memcmp(&e.mac[i], "\xFF\xFF\xFF\xFF\xFF\xFF", 6)) {  in mac_read_from_eeprom()
470 				e.mac[i][0],  in mac_read_from_eeprom()
471 				e.mac[i][1],  in mac_read_from_eeprom()
472 				e.mac[i][2],  in mac_read_from_eeprom()
473 				e.mac[i][3],  in mac_read_from_eeprom()
474 				e.mac[i][4],  in mac_read_from_eeprom()
475 				e.mac[i][5]);  in mac_read_from_eeprom()
477 			/* Only initialize environment variables that are blank  in mac_read_from_eeprom()
495 	 * that at boot time, U-Boot will still say "NXID v0".  in mac_read_from_eeprom()
509  * get_cpu_board_revision - get the CPU board revision on 85xx boards
517  * variable i2c_bus_num must be compile-time initialized to CONFIG_SYS_SPD_BUS_NUM,
518  * so that the SPD code will work.  This means that all pre-relocation I2C
519  * operations can only occur on the CONFIG_SYS_SPD_BUS_NUM bus.  So if
526 		u32 id;           /* 0x00 - 0x03 EEPROM Tag 'CCID' */  in get_cpu_board_revision()