3  * Copyright 2006, 2008-2009, 2011 Freescale Semiconductor
11  * SPDX-License-Identifier:    GPL-2.0+
34 	u8 id[4];         /* 0x00 - 0x03 EEPROM Tag 'NXID' */
35 	u8 sn[12];        /* 0x04 - 0x0F Serial Number */
36 	u8 errata[5];     /* 0x10 - 0x14 Errata Level */
37 	u8 date[6];       /* 0x15 - 0x1a Build Date */
39 	u32 version;      /* 0x1c - 0x1f NXID Version */
40 	u8 tempcal[8];    /* 0x20 - 0x27 Temperature Calibration Factors */
41 	u8 tempcalsys[2]; /* 0x28 - 0x29 System Temperature Calibration Factors */
43 	u8 res_1[21];     /* 0x2b - 0x3f Reserved */
44 	u8 mac_count;     /* 0x40        Number of MAC addresses */
45 	u8 mac_flag;      /* 0x41        MAC table flags */
46 	u8 mac[MAX_NUM_PORTS][6];     /* 0x42 - x MAC addresses */  member
60 static int eeprom_bus_num = -1;
75  * show_eeprom - display the contents of the EEPROM
103 	/* Show MAC addresses  */  in show_eeprom()
105 		u8 *p = e.mac[i];  in show_eeprom()
111 	crc = crc32(0, (void *)&e, sizeof(e) - 4);  in show_eeprom()
125 		if (((i % 16) == 15) || (i == sizeof(e) - 1))  in show_eeprom()
132  * read_eeprom - read the EEPROM into memory
141 		return -1;  in read_eeprom()
169  *  update_crc - update the CRC
183  * prog_eeprom - write the EEPROM from memory
194 		return -1;  in prog_eeprom()
206 	 * The AT24C02 datasheet says that data can only be written in page  in prog_eeprom()
212 			p, min((int)(sizeof(e) - i), 8));  in prog_eeprom()
225 			ret = -1;  in prog_eeprom()
233 		return -1;  in prog_eeprom()
241  * h2i - converts hex character into a number
249 		return p - '0';  in h2i()
252 		return (p - 'A') + 10;  in h2i()
255 		return (p - 'a') + 10;  in h2i()
261  * set_date - stores the build date into the EEPROM
264  * (2-digit year, 2-digit month, etc), converts it to a 6-byte BCD string,
272 		printf("Usage: mac date YYMMDDhhmmss\n");  in set_date()
283  * set_mac_address - stores a MAC address into the EEPROM
285  * This function takes a pointer to MAC address string
286  * (i.e."XX:XX:XX:XX:XX:XX", where "XX" is a two-digit hex number) and
287  * stores it in one of the MAC address fields of the EEPROM local copy.
295 		printf("Usage: mac <n> XX:XX:XX:XX:XX:XX\n");  in set_mac_address()
300 		e.mac[index][i] = simple_strtoul(p, &p, 16);  in set_mac_address()
353 		strncpy((char *)e.sn, argv[2], sizeof(e.sn) - 1);  in do_mac()
364 	case 'p':	/* MAC table size */  in do_mac()
368 	case '0' ... '9':	/* "mac 0" through "mac 22" */  in do_mac()
384 	unsigned char mac[6];  in mac_read_from_generic_eeprom()  local
390 	ret = i2c_read(chip, address, 1, mac, 6);  in mac_read_from_generic_eeprom()
396 			mac[0],  in mac_read_from_generic_eeprom()
397 			mac[1],  in mac_read_from_generic_eeprom()
398 			mac[2],  in mac_read_from_generic_eeprom()
399 			mac[3],  in mac_read_from_generic_eeprom()
400 			mac[4],  in mac_read_from_generic_eeprom()
401 			mac[5]);  in mac_read_from_generic_eeprom()
403 		printf("MAC: %s\n", ethaddr);  in mac_read_from_generic_eeprom()
423  * mac_read_from_eeprom - read the MAC addresses from EEPROM
425  * This function reads the MAC addresses from EEPROM and sets the
428  * The environment variables are only set if they haven't been set already.
429  * This ensures that any user-saved variables are never overwritten.
433  * For NXID v1 EEPROMs, we support loading and up-converting the older NXID v0
434  * format.  In a v0 EEPROM, there are only eight MAC addresses and the CRC is
465 	 * MAC address #9 in v1 occupies the same position as the CRC in v0.  in mac_read_from_eeprom_common()
466 	 * Erase it so that it's not mistaken for a MAC address.  We'll  in mac_read_from_eeprom_common()
470 		memset(e.mac[8], 0xff, 6);  in mac_read_from_eeprom_common()
473 		if (memcmp(&e.mac[i], "\0\0\0\0\0\0", 6) &&  in mac_read_from_eeprom_common()
474 		    memcmp(&e.mac[i], "\xFF\xFF\xFF\xFF\xFF\xFF", 6)) {  in mac_read_from_eeprom_common()
479 				e.mac[i][0],  in mac_read_from_eeprom_common()
480 				e.mac[i][1],  in mac_read_from_eeprom_common()
481 				e.mac[i][2],  in mac_read_from_eeprom_common()
482 				e.mac[i][3],  in mac_read_from_eeprom_common()
483 				e.mac[i][4],  in mac_read_from_eeprom_common()
484 				e.mac[i][5]);  in mac_read_from_eeprom_common()
486 			/* Only initialize environment variables that are blank  in mac_read_from_eeprom_common()