projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| bafcf2db WE |
2 | /* |
| 3 | * Copyright (C) 2017 PHYTEC Messtechnik GmbH | |
| 4 | * Author: Wadim Egorov <w.egorov@phytec.de> | |
| bafcf2db WE |
5 | */ |
| 6 | ||
| d678a59d | 7 | #include <eeprom.h> |
| 5255932f | 8 | #include <init.h> |
| f7ae49fc | 9 | #include <log.h> |
| 90526e9f | 10 | #include <net.h> |
| 401d1c4f | 11 | #include <asm/global_data.h> |
| 32191a39 | 12 | #include <asm/io.h> |
| d678a59d | 13 | #include <common.h> |
| 32191a39 | 14 | #include <dm.h> |
| 9fb625ce | 15 | #include <env.h> |
| f3998fdc | 16 | #include <env_internal.h> |
| 32191a39 WE |
17 | #include <i2c.h> |
| 18 | #include <i2c_eeprom.h> | |
| 19 | #include <netdev.h> | |
| cd93d625 | 20 | #include <linux/bitops.h> |
| 32191a39 WE |
21 | #include "som.h" |
| 22 | ||
| 23 | static int valid_rk3288_som(struct rk3288_som *som) | |
| 24 | { | |
| 25 | unsigned char *p = (unsigned char *)som; | |
| 26 | unsigned char *e = p + sizeof(struct rk3288_som) - 1; | |
| 27 | int hw = 0; | |
| 28 | ||
| 29 | while (p < e) { | |
| 30 | hw += hweight8(*p); | |
| 31 | p++; | |
| 32 | } | |
| 33 | ||
| 34 | return hw == som->bs; | |
| 35 | } | |
| 36 | ||
| 271318a6 | 37 | int rk3288_board_late_init(void) |
| 32191a39 WE |
38 | { |
| 39 | int ret; | |
| 40 | struct udevice *dev; | |
| 41 | struct rk3288_som opt; | |
| 42 | int off; | |
| 43 | ||
| 44 | /* Get the identificatioin page of M24C32-D EEPROM */ | |
| 45 | off = fdt_path_offset(gd->fdt_blob, "eeprom0"); | |
| 46 | if (off < 0) { | |
| 47 | printf("%s: No eeprom0 path offset\n", __func__); | |
| 48 | return off; | |
| 49 | } | |
| 50 | ||
| 51 | ret = uclass_get_device_by_of_offset(UCLASS_I2C_EEPROM, off, &dev); | |
| 52 | if (ret) { | |
| 53 | printf("%s: Could not find EEPROM\n", __func__); | |
| 54 | return ret; | |
| 55 | } | |
| 56 | ||
| 57 | ret = i2c_set_chip_offset_len(dev, 2); | |
| 58 | if (ret) | |
| 59 | return ret; | |
| 60 | ||
| 61 | ret = i2c_eeprom_read(dev, 0, (uint8_t *)&opt, | |
| 62 | sizeof(struct rk3288_som)); | |
| 63 | if (ret) { | |
| 64 | printf("%s: Could not read EEPROM\n", __func__); | |
| 65 | return ret; | |
| 66 | } | |
| 67 | ||
| 68 | if (opt.api_version != 0 || !valid_rk3288_som(&opt)) { | |
| 69 | printf("Invalid data or wrong EEPROM layout version.\n"); | |
| 70 | /* Proceed anyway, since there is no fallback option */ | |
| 71 | } | |
| 72 | ||
| 73 | if (is_valid_ethaddr(opt.mac)) | |
| 74 | eth_env_set_enetaddr("ethaddr", opt.mac); | |
| 75 | ||
| 76 | return 0; | |
| 77 | } |