+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Based on board/freescale/common/sys_eeprom.c
- * Copyright 2006, 2008-2009, 2011 Freescale Semiconductor
- *
- * This defines the API for storing board information in the
- * eeprom. It has been adapted from an earlier version of the
- * Freescale API, but has a number of key differences. Because
- * the two APIs are independent and may diverge further, the
- * Varisys version of the API is implemented separately here.
- */
-
-#include <common.h>
-#include <command.h>
-#include <env.h>
-#include <i2c.h>
-#include <linux/ctype.h>
-#include <linux/delay.h>
-#include <u-boot/crc.h>
-
-#include "eeprom.h"
-
-#ifdef CONFIG_SYS_I2C_EEPROM_NXID_MAC
-#define MAX_NUM_PORTS CONFIG_SYS_I2C_EEPROM_NXID_MAC
-#else
-#define MAX_NUM_PORTS 8
-#endif
-#define NXID_VERSION 0
-
-/**
- * static eeprom: EEPROM layout for NXID formats
- *
- * See Freescale application note AN3638 for details.
- */
-static struct __attribute__ ((__packed__)) eeprom {
- u8 id[4]; /* 0x00 - 0x03 EEPROM Tag 'NXID' */
- u8 sn[12]; /* 0x04 - 0x0F Serial Number */
- u8 errata[5]; /* 0x10 - 0x14 Errata Level */
- u8 date[6]; /* 0x15 - 0x1a Build Date */
- u8 res_0; /* 0x1b Reserved */
- u32 version; /* 0x1c - 0x1f NXID Version */
- u8 tempcal[8]; /* 0x20 - 0x27 Temperature Calibration Factors */
- u8 tempcalsys[2]; /* 0x28 - 0x29 System Temperature Calibration Factors */
- u8 tempcalflags; /* 0x2a Temperature Calibration Flags */
- u8 res_1[21]; /* 0x2b - 0x3f Reserved */
- u8 mac_count; /* 0x40 Number of MAC addresses */
- u8 mac_flag; /* 0x41 MAC table flags */
- u8 mac[MAX_NUM_PORTS][6]; /* 0x42 - x MAC addresses */
- u32 crc; /* x+1 CRC32 checksum */
-} e;
-
-/* Set to 1 if we've read EEPROM into memory */
-static int has_been_read;
-
-/* Is this a valid NXID EEPROM? */
-#define is_valid ((e.id[0] == 'N') || (e.id[1] == 'X') || \
- (e.id[2] == 'I') || (e.id[3] == 'D'))
-
-/** Fixed ID field in EEPROM */
-static unsigned char uid[16];
-
-static int eeprom_bus_num = -1;
-static int eeprom_addr;
-static int eeprom_addr_len;
-
-/**
- * This must be called before any eeprom access.
- */
-void init_eeprom(int bus_num, int addr, int addr_len)
-{
- eeprom_bus_num = bus_num;
- eeprom_addr = addr;
- eeprom_addr_len = addr_len;
-}
-
-/**
- * show_eeprom - display the contents of the EEPROM
- */
-void show_eeprom(void)
-{
- int i;
- unsigned int crc;
-
- /* EEPROM tag ID, either CCID or NXID */
- printf("ID: %c%c%c%c v%u\n", e.id[0], e.id[1], e.id[2], e.id[3],
- be32_to_cpu(e.version));
-
- /* Serial number */
- printf("SN: %s\n", e.sn);
-
- printf("UID: ");
- for (i = 0; i < 16; i++)
- printf("%02x", uid[i]);
- printf("\n");
-
- /* Errata level. */
- printf("Errata: %s\n", e.errata);
-
- /* Build date, BCD date values, as YYMMDDhhmmss */
- printf("Build date: 20%02x/%02x/%02x %02x:%02x:%02x %s\n",
- e.date[0], e.date[1], e.date[2],
- e.date[3] & 0x7F, e.date[4], e.date[5],
- e.date[3] & 0x80 ? "PM" : "");
-
- /* Show MAC addresses */
- for (i = 0; i < min(e.mac_count, (u8)MAX_NUM_PORTS); i++) {
- u8 *p = e.mac[i];
-
- printf("Eth%u: %02x:%02x:%02x:%02x:%02x:%02x\n", i,
- p[0], p[1], p[2], p[3], p[4], p[5]);
- }
-
- crc = crc32(0, (void *)&e, sizeof(e) - 4);
-
- if (crc == be32_to_cpu(e.crc))
- printf("CRC: %08x\n", be32_to_cpu(e.crc));
- else
- printf("CRC: %08x (should be %08x)\n",
- be32_to_cpu(e.crc), crc);
-
-#ifdef DEBUG
- printf("EEPROM dump: (0x%x bytes)\n", sizeof(e));
- for (i = 0; i < sizeof(e); i++) {
- if ((i % 16) == 0)
- printf("%02X: ", i);
- printf("%02X ", ((u8 *)&e)[i]);
- if (((i % 16) == 15) || (i == sizeof(e) - 1))
- printf("\n");
- }
-#endif
-}
-
-/**
- * read_eeprom - read the EEPROM into memory
- */
-int read_eeprom(void)
-{
- int ret;
- unsigned int bus;
-
- if (eeprom_bus_num < 0) {
- printf("EEPROM not configured\n");
- return -1;
- }
-
- if (has_been_read)
- return 0;
-
- bus = i2c_get_bus_num();
- i2c_set_bus_num(eeprom_bus_num);
-
- ret = i2c_read(eeprom_addr, 0, eeprom_addr_len,
- (void *)&e, sizeof(e));
-
-
- /* Fixed address of ID field */
- i2c_read(0x5f, 0x80, 1, uid, 16);
-
- i2c_set_bus_num(bus);
-
-#ifdef DEBUG
- show_eeprom();
-#endif
-
- has_been_read = (ret == 0) ? 1 : 0;
-
- return ret;
-}
-
-/**
- * update_crc - update the CRC
- *
- * This function should be called after each update to the EEPROM structure,
- * to make sure the CRC is always correct.
- */
-static void update_crc(void)
-{
- u32 crc, crc_offset = offsetof(struct eeprom, crc);
-
- crc = crc32(0, (void *)&e, crc_offset);
- e.crc = cpu_to_be32(crc);
-}
-
-/**
- * prog_eeprom - write the EEPROM from memory
- */
-static int prog_eeprom(void)
-{
- int ret = 0;
- int i;
- void *p;
- unsigned int bus;
-
- if (eeprom_bus_num < 0) {
- printf("EEPROM not configured\n");
- return -1;
- }
-
- /* Set the reserved values to 0xFF */
- e.res_0 = 0xFF;
- memset(e.res_1, 0xFF, sizeof(e.res_1));
- update_crc();
-
- bus = i2c_get_bus_num();
- i2c_set_bus_num(eeprom_bus_num);
-
- /*
- * The AT24C02 datasheet says that data can only be written in page
- * mode, which means 8 bytes at a time, and it takes up to 5ms to
- * complete a given write.
- */
- for (i = 0, p = &e; i < sizeof(e); i += 8, p += 8) {
- ret = i2c_write(eeprom_addr, i, eeprom_addr_len,
- p, min((int)(sizeof(e) - i), 8));
- if (ret)
- break;
- udelay(5000); /* 5ms write cycle timing */
- }
-
- if (!ret) {
- /* Verify the write by reading back the EEPROM and comparing */
- struct eeprom e2;
-
- ret = i2c_read(eeprom_addr, 0,
- eeprom_addr_len, (void *)&e2, sizeof(e2));
- if (!ret && memcmp(&e, &e2, sizeof(e)))
- ret = -1;
- }
-
- i2c_set_bus_num(bus);
-
- if (ret) {
- printf("Programming failed.\n");
- has_been_read = 0;
- return -1;
- }
-
- printf("Programming passed.\n");
- return 0;
-}
-
-/**
- * h2i - converts hex character into a number
- *
- * This function takes a hexadecimal character (e.g. '7' or 'C') and returns
- * the integer equivalent.
- */
-static inline u8 h2i(char p)
-{
- if ((p >= '0') && (p <= '9'))
- return p - '0';
-
- if ((p >= 'A') && (p <= 'F'))
- return (p - 'A') + 10;
-
- if ((p >= 'a') && (p <= 'f'))
- return (p - 'a') + 10;
-
- return 0;
-}
-
-/**
- * set_date - stores the build date into the EEPROM
- *
- * This function takes a pointer to a string in the format "YYMMDDhhmmss"
- * (2-digit year, 2-digit month, etc), converts it to a 6-byte BCD string,
- * and stores it in the build date field of the EEPROM local copy.
- */
-static void set_date(const char *string)
-{
- unsigned int i;
-
- if (strlen(string) != 12) {
- printf("Usage: mac date YYMMDDhhmmss\n");
- return;
- }
-
- for (i = 0; i < 6; i++)
- e.date[i] = h2i(string[2 * i]) << 4 | h2i(string[2 * i + 1]);
-
- update_crc();
-}
-
-/**
- * set_mac_address - stores a MAC address into the EEPROM
- *
- * This function takes a pointer to MAC address string
- * (i.e."XX:XX:XX:XX:XX:XX", where "XX" is a two-digit hex number) and
- * stores it in one of the MAC address fields of the EEPROM local copy.
- */
-static void set_mac_address(unsigned int index, const char *string)
-{
- char *p = (char *)string;
- unsigned int i;
-
- if ((index >= MAX_NUM_PORTS) || !string) {
- printf("Usage: mac <n> XX:XX:XX:XX:XX:XX\n");
- return;
- }
-
- for (i = 0; *p && (i < 6); i++) {
- e.mac[index][i] = hextoul(p, &p);
- if (*p == ':')
- p++;
- }
-
- update_crc();
-}
-
-int do_mac(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
-{
- char cmd;
-
- if (argc == 1) {
- show_eeprom();
- return 0;
- }
-
- cmd = argv[1][0];
-
- if (cmd == 'r') {
- read_eeprom();
- return 0;
- }
-
- if (cmd == 'i') {
- memcpy(e.id, "NXID", sizeof(e.id));
- e.version = NXID_VERSION;
- update_crc();
- return 0;
- }
-
- if (!is_valid) {
- printf("Please read the EEPROM ('r') and/or set the ID ('i') first.\n");
- return 0;
- }
-
- if (argc == 2) {
- switch (cmd) {
- case 's': /* save */
- prog_eeprom();
- break;
- default:
- return cmd_usage(cmdtp);
- }
-
- return 0;
- }
-
- /* We know we have at least one parameter */
-
- switch (cmd) {
- case 'n': /* serial number */
- memset(e.sn, 0, sizeof(e.sn));
- strncpy((char *)e.sn, argv[2], sizeof(e.sn) - 1);
- update_crc();
- break;
- case 'e': /* errata */
- memset(e.errata, 0, 5);
- strncpy((char *)e.errata, argv[2], 4);
- update_crc();
- break;
- case 'd': /* date BCD format YYMMDDhhmmss */
- set_date(argv[2]);
- break;
- case 'p': /* MAC table size */
- e.mac_count = hextoul(argv[2], NULL);
- update_crc();
- break;
- case '0' ... '9': /* "mac 0" through "mac 22" */
- set_mac_address(dectoul(argv[1], NULL), argv[2]);
- break;
- case 'h': /* help */
- default:
- return cmd_usage(cmdtp);
- }
-
- return 0;
-}
-
-int mac_read_from_generic_eeprom(const char *envvar, int chip,
- int address, int mac_bus)
-{
- int ret;
- unsigned int bus;
- unsigned char mac[6];
- char ethaddr[18];
-
- bus = i2c_get_bus_num();
- i2c_set_bus_num(mac_bus);
-
- ret = i2c_read(chip, address, 1, mac, 6);
-
- i2c_set_bus_num(bus);
-
- if (!ret) {
- sprintf(ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X",
- mac[0],
- mac[1],
- mac[2],
- mac[3],
- mac[4],
- mac[5]);
-
- printf("MAC: %s\n", ethaddr);
- env_set(envvar, ethaddr);
- }
-
- return ret;
-}
-
-void mac_read_from_fixed_id(void)
-{
-#ifdef CONFIG_SYS_I2C_MAC1_CHIP_ADDR
- mac_read_from_generic_eeprom("ethaddr", CONFIG_SYS_I2C_MAC1_CHIP_ADDR,
- CONFIG_SYS_I2C_MAC1_DATA_ADDR, CONFIG_SYS_I2C_MAC1_BUS);
-#endif
-#ifdef CONFIG_SYS_I2C_MAC2_CHIP_ADDR
- mac_read_from_generic_eeprom("eth1addr", CONFIG_SYS_I2C_MAC2_CHIP_ADDR,
- CONFIG_SYS_I2C_MAC2_DATA_ADDR, CONFIG_SYS_I2C_MAC2_BUS);
-#endif
-}
-
-/**
- * mac_read_from_eeprom - read the MAC addresses from EEPROM
- *
- * This function reads the MAC addresses from EEPROM and sets the
- * appropriate environment variables for each one read.
- *
- * The environment variables are only set if they haven't been set already.
- * This ensures that any user-saved variables are never overwritten.
- *
- * This function must be called after relocation.
- *
- * For NXID v1 EEPROMs, we support loading and up-converting the older NXID v0
- * format. In a v0 EEPROM, there are only eight MAC addresses and the CRC is
- * located at a different offset.
- */
-int mac_read_from_eeprom_common(void)
-{
- unsigned int i;
- u32 crc, crc_offset = offsetof(struct eeprom, crc);
- u32 *crcp; /* Pointer to the CRC in the data read from the EEPROM */
-
- puts("EEPROM: ");
-
- if (read_eeprom()) {
- printf("Read failed.\n");
- return 0;
- }
-
- if (!is_valid) {
- printf("Invalid ID (%02x %02x %02x %02x)\n",
- e.id[0], e.id[1], e.id[2], e.id[3]);
- return 0;
- }
-
- crc = crc32(0, (void *)&e, crc_offset);
- crcp = (void *)&e + crc_offset;
- if (crc != be32_to_cpu(*crcp)) {
- printf("CRC mismatch (%08x != %08x)\n", crc,
- be32_to_cpu(e.crc));
- return 0;
- }
-
- /*
- * MAC address #9 in v1 occupies the same position as the CRC in v0.
- * Erase it so that it's not mistaken for a MAC address. We'll
- * update the CRC later.
- */
- if (e.version == 0)
- memset(e.mac[8], 0xff, 6);
-
- for (i = 0; i < min(e.mac_count, (u8)MAX_NUM_PORTS); i++) {
- if (memcmp(&e.mac[i], "\0\0\0\0\0\0", 6) &&
- memcmp(&e.mac[i], "\xFF\xFF\xFF\xFF\xFF\xFF", 6)) {
- char ethaddr[18];
- char enetvar[9];
-
- sprintf(ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X",
- e.mac[i][0],
- e.mac[i][1],
- e.mac[i][2],
- e.mac[i][3],
- e.mac[i][4],
- e.mac[i][5]);
- sprintf(enetvar, i ? "eth%daddr" : "ethaddr", i);
- /* Only initialize environment variables that are blank
- * (i.e. have not yet been set)
- */
- if (!env_get(enetvar))
- env_set(enetvar, ethaddr);
- }
- }
-
- printf("%c%c%c%c v%u\n", e.id[0], e.id[1], e.id[2], e.id[3],
- be32_to_cpu(e.version));
-
- return 0;
-}
projects / u-boot.git / commitdiff