--- /dev/null
+/*
+ * Copyright 2006, 2008-2009, 2011 Freescale Semiconductor
+ * York Sun (yorksun@freescale.com)
+ * Haiying Wang (haiying.wang@freescale.com)
+ * Timur Tabi (timur@freescale.com)
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <i2c.h>
+
+/* #define DEBUG */
+
+/*
+ * static eeprom: EEPROM layout
+ */
+static struct __attribute__ ((__packed__)) eeprom {
+ u8 id[16]; /* 0x01 - 0x0F Type e.g. 100wG-5111 */
+ u8 sn[10]; /* 0x10 - 0x19 Serial Number */
+ u8 date[6]; /* 0x1A - 0x1F Build Date */
+ u8 mac[6]; /* 0x20 - 0x25 MAC address */
+ u8 reserved[10];/* 0x26 - 0x2f reserved */
+ u32 crc; /* x+1 CRC32 checksum */
+} e;
+
+/* Set to 1 if we've read EEPROM into memory */
+static int has_been_read;
+
+/**
+ * show_eeprom - display the contents of the EEPROM
+ */
+static void show_eeprom(void)
+{
+ unsigned int crc;
+ char safe_string[16];
+
+#ifdef DEBUG
+ int i;
+#endif
+ u8 *p;
+
+ /* ID */
+ strncpy(safe_string, (char *)e.id, sizeof(e.id));
+ safe_string[sizeof(e.id)-1] = 0;
+ printf("ID: mvBlueLYNX-X%s\n", safe_string);
+
+ /* Serial number */
+ strncpy(safe_string, (char *)e.sn, sizeof(e.sn));
+ safe_string[sizeof(e.sn)-1] = 0;
+ printf("SN: %s\n", safe_string);
+
+ /* 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 address */
+ p = e.mac;
+ printf("Eth: %02x:%02x:%02x:%02x:%02x:%02x\n",
+ 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
+ */
+static int read_eeprom(void)
+{
+ int ret;
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+ unsigned int bus;
+#endif
+
+ if (has_been_read)
+ return 0;
+
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+ bus = i2c_get_bus_num();
+ i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM);
+#endif
+
+ ret = eeprom_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0,
+ (uchar *)&e, sizeof(e));
+
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+ i2c_set_bus_num(bus);
+#endif
+
+#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 = crc32(0, (void *)&e, sizeof(e) - 4);
+ e.crc = cpu_to_be32(crc);
+}
+
+/**
+ * prog_eeprom - write the EEPROM from memory
+ */
+static int prog_eeprom(void)
+{
+ int ret = 0;
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+ unsigned int bus;
+#endif
+
+ update_crc();
+
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+ bus = i2c_get_bus_num();
+ i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM);
+#endif
+
+ ret = eeprom_write(CONFIG_SYS_I2C_EEPROM_ADDR, 0,
+ (uchar *)&e, sizeof(e));
+
+ if (!ret) {
+ /* Verify the write by reading back the EEPROM and comparing */
+ struct eeprom e2;
+#ifdef DEBUG
+ printf("%s verifying...\n", __func__);
+#endif
+ ret = eeprom_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0,
+ (uchar *)&e2, sizeof(e2));
+
+ if (!ret && memcmp(&e, &e2, sizeof(e)))
+ ret = -1;
+ }
+
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+ i2c_set_bus_num(bus);
+#endif
+
+ 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 the MAC address field in the EEPROM local copy.
+ */
+static void set_mac_address(const char *string)
+{
+ char *p = (char *) string;
+ unsigned int i;
+
+ for (i = 0; *p && (i < 6); i++) {
+ e.mac[i] = simple_strtoul(p, &p, 16);
+ if (*p == ':')
+ p++;
+ }
+
+ update_crc();
+}
+
+int do_mac(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ char cmd;
+
+ if (argc == 1) {
+ show_eeprom();
+ return 0;
+ }
+
+ cmd = argv[1][0];
+
+ if (cmd == 'r') {
+#ifdef DEBUG
+ printf("%s read\n", __func__);
+#endif
+ read_eeprom();
+ return 0;
+ }
+
+ if (argc == 2) {
+ switch (cmd) {
+ case 's': /* save */
+#ifdef DEBUG
+ printf("%s save\n", __func__);
+#endif
+ prog_eeprom();
+ break;
+ default:
+ return cmd_usage(cmdtp);
+ }
+
+ return 0;
+ }
+
+ /* We know we have at least one parameter */
+
+ switch (cmd) {
+ case 'n': /* serial number */
+#ifdef DEBUG
+ printf("%s serial number\n", __func__);
+#endif
+ memset(e.sn, 0, sizeof(e.sn));
+ strncpy((char *)e.sn, argv[2], sizeof(e.sn) - 1);
+ update_crc();
+ break;
+ case 'd': /* date BCD format YYMMDDhhmmss */
+ set_date(argv[2]);
+ break;
+ case 'e': /* errata */
+ printf("mac errata not implemented\n");
+ break;
+ case 'i': /* id */
+ memset(e.id, 0, sizeof(e.id));
+ strncpy((char *)e.id, argv[2], sizeof(e.id) - 1);
+ update_crc();
+ break;
+ case 'p': /* ports */
+ printf("mac ports not implemented (always 1 port)\n");
+ break;
+ case '0' ... '9':
+ /* we only have "mac 0" but any digit can be used here */
+ set_mac_address(argv[2]);
+ break;
+ case 'h': /* help */
+ default:
+ return cmd_usage(cmdtp);
+ }
+
+ return 0;
+}
+
+static inline int is_portrait(void)
+{
+ int i;
+ unsigned int orient_index = 0; /* idx of char which determines orientation */
+
+ for (i = sizeof(e.id)/sizeof(*e.id) - 1; i>=0; i--) {
+ if (e.id[i] == '-') {
+ orient_index = i+1;
+ break;
+ }
+ }
+
+ return (orient_index &&
+ (e.id[orient_index] >= '5') && (e.id[orient_index] <= '8'));
+}
+
+int mac_read_from_eeprom(void)
+{
+ u32 crc, crc_offset = offsetof(struct eeprom, crc);
+ u32 *crcp; /* Pointer to the CRC in the data read from the EEPROM */
+#define FILENAME_LANDSCAPE "mvBlueLynx_X.rbf"
+#define FILENAME_PORTRAIT "mvBlueLynx_X_sensor_cd.rbf"
+
+ if (read_eeprom()) {
+ printf("EEPROM Read failed.\n");
+ return -1;
+ }
+
+ crc = crc32(0, (void *)&e, crc_offset);
+ crcp = (void *)&e + crc_offset;
+ if (crc != be32_to_cpu(*crcp)) {
+ printf("EEPROM CRC mismatch (%08x != %08x)\n", crc,
+ be32_to_cpu(e.crc));
+ return -1;
+ }
+
+ if (memcmp(&e.mac, "\0\0\0\0\0\0", 6) &&
+ memcmp(&e.mac, "\xFF\xFF\xFF\xFF\xFF\xFF", 6)) {
+ char ethaddr[9];
+
+ sprintf(ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X",
+ e.mac[0],
+ e.mac[1],
+ e.mac[2],
+ e.mac[3],
+ e.mac[4],
+ e.mac[5]);
+ /* Only initialize environment variables that are blank
+ * (i.e. have not yet been set)
+ */
+ if (!getenv("ethaddr"))
+ setenv("ethaddr", ethaddr);
+ }
+
+ if (memcmp(&e.sn, "\0\0\0\0\0\0\0\0\0\0", 10) &&
+ memcmp(&e.sn, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 10)) {
+ char serial_num[12];
+
+ strncpy(serial_num, (char *)e.sn, sizeof(e.sn) - 1);
+ /* Only initialize environment variables that are blank
+ * (i.e. have not yet been set)
+ */
+ if (!getenv("serial#"))
+ setenv("serial#", serial_num);
+ }
+
+ /* decide which fpga file to load depending on orientation */
+ if (is_portrait())
+ setenv("fpgafilename", FILENAME_PORTRAIT);
+ else
+ setenv("fpgafilename", FILENAME_LANDSCAPE);
+
+ /* TODO should I calculate CRC here? */
+ return 0;
+}
+
+#ifdef CONFIG_SERIAL_TAG
+void get_board_serial(struct tag_serialnr *serialnr)
+{
+ char *serial = getenv("serial#");
+
+ if (serial && (strlen(serial) > 3)) {
+ /* use the numerical part of the serial number LXnnnnnn */
+ serialnr->high = 0;
+ serialnr->low = simple_strtoul(serial + 2, NULL, 10);
+ } else {
+ serialnr->high = 0;
+ serialnr->low = 0;
+ }
+}
+#endif
Code Review / kvmfornfv.git / blobdiff