+/*
+ * (C) Copyright 2013
+ * Corscience GmbH & Co. KG, <www.corscience.de>
+ * Andreas Bießmann <andreas.biessmann@corscience.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <common.h>
+#include <i2c.h>
+
+#include "tricorder-eeprom.h"
+
+static inline void warn_wrong_value(const char *msg, unsigned int a,
+ unsigned int b)
+{
+ printf("Expected EEPROM %s %08x, got %08x\n", msg, a, b);
+}
+
+static int handle_eeprom_v0(struct tricorder_eeprom *eeprom)
+{
+ struct tricorder_eeprom_v0 {
+ uint32_t magic;
+ uint16_t length;
+ uint16_t version;
+ char board_name[TRICORDER_BOARD_NAME_LENGTH];
+ char board_version[TRICORDER_BOARD_VERSION_LENGTH];
+ char board_serial[TRICORDER_BOARD_SERIAL_LENGTH];
+ uint32_t crc32;
+ } __packed eepromv0;
+ uint32_t crc;
+
+ printf("Old EEPROM (v0), consider rewrite!\n");
+
+ if (be16_to_cpu(eeprom->length) != sizeof(eepromv0)) {
+ warn_wrong_value("length", sizeof(eepromv0),
+ be16_to_cpu(eeprom->length));
+ return 1;
+ }
+
+ memcpy(&eepromv0, eeprom, sizeof(eepromv0));
+
+ crc = crc32(0L, (unsigned char *)&eepromv0,
+ sizeof(eepromv0) - sizeof(eepromv0.crc32));
+ if (be32_to_cpu(eepromv0.crc32) != crc) {
+ warn_wrong_value("CRC", be32_to_cpu(eepromv0.crc32),
+ crc);
+ return 1;
+ }
+
+ /* Ok the content is correct, do the conversion */
+ memset(eeprom->interface_version, 0x0,
+ TRICORDER_INTERFACE_VERSION_LENGTH);
+ crc = crc32(0L, (unsigned char *)eeprom, TRICORDER_EEPROM_CRC_SIZE);
+ eeprom->crc32 = cpu_to_be32(crc);
+
+ return 0;
+}
+
+static int handle_eeprom_v1(struct tricorder_eeprom *eeprom)
+{
+ uint32_t crc;
+
+ if (be16_to_cpu(eeprom->length) != TRICORDER_EEPROM_SIZE) {
+ warn_wrong_value("length", TRICORDER_EEPROM_SIZE,
+ be16_to_cpu(eeprom->length));
+ return 1;
+ }
+
+ crc = crc32(0L, (unsigned char *)eeprom, TRICORDER_EEPROM_CRC_SIZE);
+ if (be32_to_cpu(eeprom->crc32) != crc) {
+ warn_wrong_value("CRC", be32_to_cpu(eeprom->crc32), crc);
+ return 1;
+ }
+
+ return 0;
+}
+
+int tricorder_get_eeprom(int addr, struct tricorder_eeprom *eeprom)
+{
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+ unsigned int bus = i2c_get_bus_num();
+ i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM);
+#endif
+
+ memset(eeprom, 0, TRICORDER_EEPROM_SIZE);
+
+ i2c_read(addr, 0, 2, (unsigned char *)eeprom, TRICORDER_EEPROM_SIZE);
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+ i2c_set_bus_num(bus);
+#endif
+
+ if (be32_to_cpu(eeprom->magic) != TRICORDER_EEPROM_MAGIC) {
+ warn_wrong_value("magic", TRICORDER_EEPROM_MAGIC,
+ be32_to_cpu(eeprom->magic));
+ return 1;
+ }
+
+ switch (be16_to_cpu(eeprom->version)) {
+ case 0:
+ return handle_eeprom_v0(eeprom);
+ case 1:
+ return handle_eeprom_v1(eeprom);
+ default:
+ warn_wrong_value("version", TRICORDER_EEPROM_VERSION,
+ be16_to_cpu(eeprom->version));
+ return 1;
+ }
+}
+
+#if !defined(CONFIG_SPL)
+int tricorder_eeprom_read(unsigned devaddr)
+{
+ struct tricorder_eeprom eeprom;
+ int ret = tricorder_get_eeprom(devaddr, &eeprom);
+
+ if (ret)
+ return ret;
+
+ printf("Board type: %.*s\n",
+ sizeof(eeprom.board_name), eeprom.board_name);
+ printf("Board version: %.*s\n",
+ sizeof(eeprom.board_version), eeprom.board_version);
+ printf("Board serial: %.*s\n",
+ sizeof(eeprom.board_serial), eeprom.board_serial);
+ printf("Board interface version: %.*s\n",
+ sizeof(eeprom.interface_version),
+ eeprom.interface_version);
+
+ return ret;
+}
+
+int tricorder_eeprom_write(unsigned devaddr, const char *name,
+ const char *version, const char *serial, const char *interface)
+{
+ struct tricorder_eeprom eeprom, eeprom_verify;
+ size_t length;
+ uint32_t crc;
+ int ret;
+ unsigned char *p;
+ int i;
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+ unsigned int bus;
+#endif
+
+ memset(eeprom, 0, TRICORDER_EEPROM_SIZE);
+ memset(eeprom_verify, 0, TRICORDER_EEPROM_SIZE);
+
+ eeprom.magic = cpu_to_be32(TRICORDER_EEPROM_MAGIC);
+ eeprom.length = cpu_to_be16(TRICORDER_EEPROM_SIZE);
+ eeprom.version = cpu_to_be16(TRICORDER_EEPROM_VERSION);
+
+ length = min(sizeof(eeprom.board_name), strlen(name));
+ strncpy(eeprom.board_name, name, length);
+
+ length = min(sizeof(eeprom.board_version), strlen(version));
+ strncpy(eeprom.board_version, version, length);
+
+ length = min(sizeof(eeprom.board_serial), strlen(serial));
+ strncpy(eeprom.board_serial, serial, length);
+
+ if (interface) {
+ length = min(sizeof(eeprom.interface_version),
+ strlen(interface));
+ strncpy(eeprom.interface_version, interface, length);
+ }
+
+ crc = crc32(0L, (unsigned char *)&eeprom, TRICORDER_EEPROM_CRC_SIZE);
+ eeprom.crc32 = cpu_to_be32(crc);
+
+#if defined(DEBUG)
+ puts("Tricorder EEPROM content:\n");
+ print_buffer(0, &eeprom, 1, sizeof(eeprom), 16);
+#endif
+
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+ bus = i2c_get_bus_num();
+ i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM);
+#endif
+
+ /* do page write to the eeprom */
+ for (i = 0, p = (unsigned char *)&eeprom;
+ i < sizeof(eeprom);
+ i += 32, p += 32) {
+ ret = i2c_write(devaddr, i, CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
+ p, min(sizeof(eeprom) - i, 32));
+ if (ret)
+ break;
+ udelay(5000); /* 5ms write cycle timing */
+ }
+
+ ret = i2c_read(devaddr, 0, 2, (unsigned char *)&eeprom_verify,
+ TRICORDER_EEPROM_SIZE);
+
+ if (memcmp(&eeprom, &eeprom_verify, sizeof(eeprom)) != 0) {
+ printf("Tricorder: Could not verify EEPROM content!\n");
+ ret = 1;
+ }
+
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+ i2c_set_bus_num(bus);
+#endif
+ return ret;
+}
+
+int do_tricorder_eeprom(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ if (argc == 3) {
+ ulong dev_addr = simple_strtoul(argv[2], NULL, 16);
+ eeprom_init();
+ if (strcmp(argv[1], "read") == 0) {
+ int rcode;
+
+ rcode = tricorder_eeprom_read(dev_addr);
+
+ return rcode;
+ }
+ } else if (argc == 6 || argc == 7) {
+ ulong dev_addr = simple_strtoul(argv[2], NULL, 16);
+ char *name = argv[3];
+ char *version = argv[4];
+ char *serial = argv[5];
+ char *interface = NULL;
+ eeprom_init();
+
+ if (argc == 7)
+ interface = argv[6];
+
+ if (strcmp(argv[1], "write") == 0) {
+ int rcode;
+
+ rcode = tricorder_eeprom_write(dev_addr, name, version,
+ serial, interface);
+
+ return rcode;
+ }
+ }
+
+ return CMD_RET_USAGE;
+}
+
+U_BOOT_CMD(
+ tricordereeprom, 7, 1, do_tricorder_eeprom,
+ "Tricorder EEPROM",
+ "read devaddr\n"
+ " - read Tricorder EEPROM at devaddr and print content\n"
+ "tricordereeprom write devaddr name version serial [interface]\n"
+ " - write Tricorder EEPROM at devaddr with 'name', 'version'"
+ "and 'serial'\n"
+ " optional add an HW interface parameter"
+);
+#endif /* CONFIG_SPL */
projects / karo-tx-uboot.git / commitdiff