2 * Copyright 2006, 2008-2009, 2011 Freescale Semiconductor
3 * York Sun (yorksun@freescale.com)
4 * Haiying Wang (haiying.wang@freescale.com)
5 * Timur Tabi (timur@freescale.com)
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <linux/ctype.h>
31 #ifdef CONFIG_SYS_I2C_EEPROM_CCID
32 #include "../common/eeprom.h"
33 #define MAX_NUM_PORTS 8
36 #ifdef CONFIG_SYS_I2C_EEPROM_NXID
37 #define MAX_NUM_PORTS 23
38 #define NXID_VERSION 1
42 * static eeprom: EEPROM layout for CCID or NXID formats
44 * See application note AN3638 for details.
46 static struct __attribute__ ((__packed__)) eeprom {
47 #ifdef CONFIG_SYS_I2C_EEPROM_CCID
48 u8 id[4]; /* 0x00 - 0x03 EEPROM Tag 'CCID' */
49 u8 major; /* 0x04 Board revision, major */
50 u8 minor; /* 0x05 Board revision, minor */
51 u8 sn[10]; /* 0x06 - 0x0F Serial Number*/
52 u8 errata[2]; /* 0x10 - 0x11 Errata Level */
53 u8 date[6]; /* 0x12 - 0x17 Build Date */
54 u8 res_0[40]; /* 0x18 - 0x3f Reserved */
55 u8 mac_count; /* 0x40 Number of MAC addresses */
56 u8 mac_flag; /* 0x41 MAC table flags */
57 u8 mac[MAX_NUM_PORTS][6]; /* 0x42 - 0x71 MAC addresses */
58 u32 crc; /* 0x72 CRC32 checksum */
60 #ifdef CONFIG_SYS_I2C_EEPROM_NXID
61 u8 id[4]; /* 0x00 - 0x03 EEPROM Tag 'NXID' */
62 u8 sn[12]; /* 0x04 - 0x0F Serial Number */
63 u8 errata[5]; /* 0x10 - 0x14 Errata Level */
64 u8 date[6]; /* 0x15 - 0x1a Build Date */
65 u8 res_0; /* 0x1b Reserved */
66 u32 version; /* 0x1c - 0x1f NXID Version */
67 u8 tempcal[8]; /* 0x20 - 0x27 Temperature Calibration Factors */
68 u8 tempcalsys[2]; /* 0x28 - 0x29 System Temperature Calibration Factors */
69 u8 tempcalflags; /* 0x2a Temperature Calibration Flags */
70 u8 res_1[21]; /* 0x2b - 0x3f Reserved */
71 u8 mac_count; /* 0x40 Number of MAC addresses */
72 u8 mac_flag; /* 0x41 MAC table flags */
73 u8 mac[MAX_NUM_PORTS][6]; /* 0x42 - x MAC addresses */
74 u32 crc; /* x+1 CRC32 checksum */
78 /* Set to 1 if we've read EEPROM into memory */
79 static int has_been_read = 0;
81 #ifdef CONFIG_SYS_I2C_EEPROM_NXID
82 /* Is this a valid NXID EEPROM? */
83 #define is_valid ((e.id[0] == 'N') || (e.id[1] == 'X') || \
84 (e.id[2] == 'I') || (e.id[3] == 'D'))
87 #ifdef CONFIG_SYS_I2C_EEPROM_CCID
88 /* Is this a valid CCID EEPROM? */
89 #define is_valid ((e.id[0] == 'C') || (e.id[1] == 'C') || \
90 (e.id[2] == 'I') || (e.id[3] == 'D'))
94 * show_eeprom - display the contents of the EEPROM
96 static void show_eeprom(void)
101 /* EEPROM tag ID, either CCID or NXID */
102 #ifdef CONFIG_SYS_I2C_EEPROM_NXID
103 printf("ID: %c%c%c%c v%u\n", e.id[0], e.id[1], e.id[2], e.id[3],
104 be32_to_cpu(e.version));
106 printf("ID: %c%c%c%c\n", e.id[0], e.id[1], e.id[2], e.id[3]);
110 printf("SN: %s\n", e.sn);
113 #ifdef CONFIG_SYS_I2C_EEPROM_NXID
114 printf("Errata: %s\n", e.errata);
116 printf("Errata: %c%c\n",
117 e.errata[0] ? e.errata[0] : '.',
118 e.errata[1] ? e.errata[1] : '.');
121 /* Build date, BCD date values, as YYMMDDhhmmss */
122 printf("Build date: 20%02x/%02x/%02x %02x:%02x:%02x %s\n",
123 e.date[0], e.date[1], e.date[2],
124 e.date[3] & 0x7F, e.date[4], e.date[5],
125 e.date[3] & 0x80 ? "PM" : "");
127 /* Show MAC addresses */
128 for (i = 0; i < min(e.mac_count, MAX_NUM_PORTS); i++) {
132 printf("Eth%u: %02x:%02x:%02x:%02x:%02x:%02x\n", i,
133 p[0], p[1], p[2], p[3], p[4], p[5]);
136 crc = crc32(0, (void *)&e, sizeof(e) - 4);
138 if (crc == be32_to_cpu(e.crc))
139 printf("CRC: %08x\n", be32_to_cpu(e.crc));
141 printf("CRC: %08x (should be %08x)\n",
142 be32_to_cpu(e.crc), crc);
145 printf("EEPROM dump: (0x%x bytes)\n", sizeof(e));
146 for (i = 0; i < sizeof(e); i++) {
149 printf("%02X ", ((u8 *)&e)[i]);
150 if (((i % 16) == 15) || (i == sizeof(e) - 1))
157 * read_eeprom - read the EEPROM into memory
159 static int read_eeprom(void)
162 #ifdef CONFIG_SYS_EEPROM_BUS_NUM
169 #ifdef CONFIG_SYS_EEPROM_BUS_NUM
170 bus = i2c_get_bus_num();
171 i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM);
174 ret = i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
175 (void *)&e, sizeof(e));
177 #ifdef CONFIG_SYS_EEPROM_BUS_NUM
178 i2c_set_bus_num(bus);
185 has_been_read = (ret == 0) ? 1 : 0;
191 * update_crc - update the CRC
193 * This function should be called after each update to the EEPROM structure,
194 * to make sure the CRC is always correct.
196 static void update_crc(void)
200 crc = crc32(0, (void *)&e, sizeof(e) - 4);
201 e.crc = cpu_to_be32(crc);
205 * prog_eeprom - write the EEPROM from memory
207 static int prog_eeprom(void)
212 #ifdef CONFIG_SYS_EEPROM_BUS_NUM
216 /* Set the reserved values to 0xFF */
217 #ifdef CONFIG_SYS_I2C_EEPROM_NXID
219 memset(e.res_1, 0xFF, sizeof(e.res_1));
221 memset(e.res_0, 0xFF, sizeof(e.res_0));
225 #ifdef CONFIG_SYS_EEPROM_BUS_NUM
226 bus = i2c_get_bus_num();
227 i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM);
231 * The AT24C02 datasheet says that data can only be written in page
232 * mode, which means 8 bytes at a time, and it takes up to 5ms to
233 * complete a given write.
235 for (i = 0, p = &e; i < sizeof(e); i += 8, p += 8) {
236 ret = i2c_write(CONFIG_SYS_I2C_EEPROM_ADDR, i, CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
237 p, min((sizeof(e) - i), 8));
240 udelay(5000); /* 5ms write cycle timing */
244 /* Verify the write by reading back the EEPROM and comparing */
247 ret = i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0,
248 CONFIG_SYS_I2C_EEPROM_ADDR_LEN, (void *)&e2, sizeof(e2));
249 if (!ret && memcmp(&e, &e2, sizeof(e)))
253 #ifdef CONFIG_SYS_EEPROM_BUS_NUM
254 i2c_set_bus_num(bus);
258 printf("Programming failed.\n");
263 printf("Programming passed.\n");
268 * h2i - converts hex character into a number
270 * This function takes a hexadecimal character (e.g. '7' or 'C') and returns
271 * the integer equivalent.
273 static inline u8 h2i(char p)
275 if ((p >= '0') && (p <= '9'))
278 if ((p >= 'A') && (p <= 'F'))
279 return (p - 'A') + 10;
281 if ((p >= 'a') && (p <= 'f'))
282 return (p - 'a') + 10;
288 * set_date - stores the build date into the EEPROM
290 * This function takes a pointer to a string in the format "YYMMDDhhmmss"
291 * (2-digit year, 2-digit month, etc), converts it to a 6-byte BCD string,
292 * and stores it in the build date field of the EEPROM local copy.
294 static void set_date(const char *string)
298 if (strlen(string) != 12) {
299 printf("Usage: mac date YYMMDDhhmmss\n");
303 for (i = 0; i < 6; i++)
304 e.date[i] = h2i(string[2 * i]) << 4 | h2i(string[2 * i + 1]);
310 * set_mac_address - stores a MAC address into the EEPROM
312 * This function takes a pointer to MAC address string
313 * (i.e."XX:XX:XX:XX:XX:XX", where "XX" is a two-digit hex number) and
314 * stores it in one of the MAC address fields of the EEPROM local copy.
316 static void set_mac_address(unsigned int index, const char *string)
318 char *p = (char *) string;
321 if ((index >= MAX_NUM_PORTS) || !string) {
322 printf("Usage: mac <n> XX:XX:XX:XX:XX:XX\n");
326 for (i = 0; *p && (i < 6); i++) {
327 e.mac[index][i] = simple_strtoul(p, &p, 16);
335 int do_mac(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
352 #ifdef CONFIG_SYS_I2C_EEPROM_NXID
353 memcpy(e.id, "NXID", sizeof(e.id));
354 e.version = NXID_VERSION;
356 memcpy(e.id, "CCID", sizeof(e.id));
363 printf("Please read the EEPROM ('r') and/or set the ID ('i') first.\n");
373 return cmd_usage(cmdtp);
379 /* We know we have at least one parameter */
382 case 'n': /* serial number */
383 memset(e.sn, 0, sizeof(e.sn));
384 strncpy((char *)e.sn, argv[2], sizeof(e.sn) - 1);
387 case 'e': /* errata */
388 #ifdef CONFIG_SYS_I2C_EEPROM_NXID
389 memset(e.errata, 0, 5);
390 strncpy((char *)e.errata, argv[2], 4);
392 e.errata[0] = argv[2][0];
393 e.errata[1] = argv[2][1];
397 case 'd': /* date BCD format YYMMDDhhmmss */
400 case 'p': /* MAC table size */
401 e.mac_count = simple_strtoul(argv[2], NULL, 16);
404 case '0' ... '9': /* "mac 0" through "mac 22" */
405 set_mac_address(simple_strtoul(argv[1], NULL, 10), argv[2]);
409 return cmd_usage(cmdtp);
416 * mac_read_from_eeprom - read the MAC addresses from EEPROM
418 * This function reads the MAC addresses from EEPROM and sets the
419 * appropriate environment variables for each one read.
421 * The environment variables are only set if they haven't been set already.
422 * This ensures that any user-saved variables are never overwritten.
424 * This function must be called after relocation.
426 * For NXID v1 EEPROMs, we support loading and up-converting the older NXID v0
427 * format. In a v0 EEPROM, there are only eight MAC addresses and the CRC is
428 * located at a different offset.
430 int mac_read_from_eeprom(void)
433 u32 crc, crc_offset = offsetof(struct eeprom, crc);
434 u32 *crcp; /* Pointer to the CRC in the data read from the EEPROM */
439 printf("Read failed.\n");
444 printf("Invalid ID (%02x %02x %02x %02x)\n",
445 e.id[0], e.id[1], e.id[2], e.id[3]);
449 #ifdef CONFIG_SYS_I2C_EEPROM_NXID
451 * If we've read an NXID v0 EEPROM, then we need to set the CRC offset
452 * to where it is in v0.
458 crc = crc32(0, (void *)&e, crc_offset);
459 crcp = (void *)&e + crc_offset;
460 if (crc != be32_to_cpu(*crcp)) {
461 printf("CRC mismatch (%08x != %08x)\n", crc, be32_to_cpu(e.crc));
465 #ifdef CONFIG_SYS_I2C_EEPROM_NXID
467 * MAC address #9 in v1 occupies the same position as the CRC in v0.
468 * Erase it so that it's not mistaken for a MAC address. We'll
469 * update the CRC later.
472 memset(e.mac[8], 0xff, 6);
475 for (i = 0; i < min(e.mac_count, MAX_NUM_PORTS); i++) {
476 if (memcmp(&e.mac[i], "\0\0\0\0\0\0", 6) &&
477 memcmp(&e.mac[i], "\xFF\xFF\xFF\xFF\xFF\xFF", 6)) {
481 sprintf(ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X",
488 sprintf(enetvar, i ? "eth%daddr" : "ethaddr", i);
489 /* Only initialize environment variables that are blank
490 * (i.e. have not yet been set)
492 if (!getenv(enetvar))
493 setenv(enetvar, ethaddr);
497 #ifdef CONFIG_SYS_I2C_EEPROM_NXID
498 printf("%c%c%c%c v%u\n", e.id[0], e.id[1], e.id[2], e.id[3],
499 be32_to_cpu(e.version));
501 printf("%c%c%c%c\n", e.id[0], e.id[1], e.id[2], e.id[3]);
504 #ifdef CONFIG_SYS_I2C_EEPROM_NXID
506 * Now we need to upconvert the data into v1 format. We do this last so
507 * that at boot time, U-Boot will still say "NXID v0".
509 if (e.version == 0) {
510 e.version = NXID_VERSION;
518 #ifdef CONFIG_SYS_I2C_EEPROM_CCID
521 * get_cpu_board_revision - get the CPU board revision on 85xx boards
523 * Read the EEPROM to determine the board revision.
525 * This function is called before relocation, so we need to read a private
526 * copy of the EEPROM into a local variable on the stack.
528 * Also, we assume that CONFIG_SYS_EEPROM_BUS_NUM == CONFIG_SYS_SPD_BUS_NUM. The global
529 * variable i2c_bus_num must be compile-time initialized to CONFIG_SYS_SPD_BUS_NUM,
530 * so that the SPD code will work. This means that all pre-relocation I2C
531 * operations can only occur on the CONFIG_SYS_SPD_BUS_NUM bus. So if
532 * CONFIG_SYS_EEPROM_BUS_NUM != CONFIG_SYS_SPD_BUS_NUM, then we can't read the EEPROM when
533 * this function is called. Oh well.
535 unsigned int get_cpu_board_revision(void)
537 struct board_eeprom {
538 u32 id; /* 0x00 - 0x03 EEPROM Tag 'CCID' */
539 u8 major; /* 0x04 Board revision, major */
540 u8 minor; /* 0x05 Board revision, minor */
543 i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
544 (void *)&be, sizeof(be));
546 if (be.id != (('C' << 24) | ('C' << 16) | ('I' << 8) | 'D'))
547 return MPC85XX_CPU_BOARD_REV(0, 0);
549 if ((be.major == 0xff) && (be.minor == 0xff))
550 return MPC85XX_CPU_BOARD_REV(0, 0);
552 return MPC85XX_CPU_BOARD_REV(be.major, be.minor);