// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (c) 2020 Toradex */ #include #include DECLARE_GLOBAL_DATA_PTR; static int get_tdx_eeprom(u32 eeprom_id, struct udevice **devp) { int ret = 0; int node; ofnode eeprom; char eeprom_str[16]; const char *path; if (gd->fdt_blob == NULL) { printf("%s: don't have a valid gd->fdt_blob!\n", __func__); return -EFAULT; } node = fdt_path_offset(gd->fdt_blob, "/aliases"); if (node < 0) return -ENODEV; sprintf(eeprom_str, "eeprom%d", eeprom_id); path = fdt_getprop(gd->fdt_blob, node, eeprom_str, NULL); if (!path) { printf("%s: no alias for %s\n", __func__, eeprom_str); return -ENODEV; } eeprom = ofnode_path(path); if (!ofnode_valid(eeprom)) { printf("%s: invalid hardware path to EEPROM\n", __func__); return -ENODEV; } ret = uclass_get_device_by_ofnode(UCLASS_I2C_EEPROM, eeprom, devp); if (ret) { printf("%s: cannot find EEPROM by node\n", __func__); return ret; } return ret; } #ifdef DEBUG static void print_tdx_hex(u8 *buf, int size) { unsigned char *p = (unsigned char *)buf; printf("Toradex config block: \n"); for (int i = 0; i < size; ++i) { if (! (i % 16) && i) printf("\n"); printf("0x%02x ", p[i]); } printf("\n\n"); } #endif int read_tdx_eeprom_data(u32 eeprom_id, int offset, u8 *buf, int size) { struct udevice *dev; int ret; ret = get_tdx_eeprom(eeprom_id, &dev); if (ret) return ret; ret = i2c_eeprom_read(dev, 0x0, buf, size); if (ret) { printf("%s: error reading data from EEPROM id: %d!, ret = %d\n", __func__, eeprom_id, ret); return ret; } #ifdef DEBUG print_tdx_hex(buf, size); #endif return ret; } int write_tdx_eeprom_data(u32 eeprom_id, int offset, u8 *buf, int size) { struct udevice *dev; int ret; ret = get_tdx_eeprom(eeprom_id, &dev); if (ret) return ret; #ifdef DEBUG print_tdx_hex(buf, size); #endif ret = i2c_eeprom_write(dev, 0x0, buf, size); if (ret) { printf("%s: error writing data to EEPROM id: %d, ret = %d\n", __func__, eeprom_id, ret); return ret; } return ret; }