varisys/common/sys_eeprom.c

1 // SPDX-License-Identifier: GPL-2.0+
4  * Copyright 2006, 2008-2009, 2011 Freescale Semiconductor
6  * This defines the API for storing board information in the
8  * Freescale API, but has a number of key differences. Because
10  * Varisys version of the API is implemented separately here.
33 	u8 id[4];         /* 0x00 - 0x03 EEPROM Tag 'NXID' */
34 	u8 sn[12];        /* 0x04 - 0x0F Serial Number */
35 	u8 errata[5];     /* 0x10 - 0x14 Errata Level */
36 	u8 date[6];       /* 0x15 - 0x1a Build Date */
38 	u32 version;      /* 0x1c - 0x1f NXID Version */
39 	u8 tempcal[8];    /* 0x20 - 0x27 Temperature Calibration Factors */
40 	u8 tempcalsys[2]; /* 0x28 - 0x29 System Temperature Calibration Factors */
42 	u8 res_1[21];     /* 0x2b - 0x3f Reserved */
45 	u8 mac[MAX_NUM_PORTS][6];     /* 0x42 - x MAC addresses */
59 static int eeprom_bus_num = -1;
74  * show_eeprom - display the contents of the EEPROM
100 		e.date[3] & 0x80 ? "PM" : "");  in show_eeprom()
110 	crc = crc32(0, (void *)&e, sizeof(e) - 4);  in show_eeprom()
124 		if (((i % 16) == 15) || (i == sizeof(e) - 1))  in show_eeprom()
131  * read_eeprom - read the EEPROM into memory
140 		return -1;  in read_eeprom()
168  *  update_crc - update the CRC
182  * prog_eeprom - write the EEPROM from memory
193 		return -1;  in prog_eeprom()
211 			p, min((int)(sizeof(e) - i), 8));  in prog_eeprom()
224 			ret = -1;  in prog_eeprom()
232 		return -1;  in prog_eeprom()
240  * h2i - converts hex character into a number
248 		return p - '0';  in h2i()
251 		return (p - 'A') + 10;  in h2i()
254 		return (p - 'a') + 10;  in h2i()
260  * set_date - stores the build date into the EEPROM
263  * (2-digit year, 2-digit month, etc), converts it to a 6-byte BCD string,
282  * set_mac_address - stores a MAC address into the EEPROM
285  * (i.e."XX:XX:XX:XX:XX:XX", where "XX" is a two-digit hex number) and
352 		strncpy((char *)e.sn, argv[2], sizeof(e.sn) - 1);  in do_mac()
422  * mac_read_from_eeprom - read the MAC addresses from EEPROM
428  * This ensures that any user-saved variables are never overwritten.
432  * For NXID v1 EEPROMs, we support loading and up-converting the older NXID v0