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https://github.com/AsahiLinux/u-boot
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68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017-2020 ABB
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*/
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#include <common.h>
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#include <i2c.h>
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#include <asm/gpio.h>
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#include "../common/common.h"
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/*
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* For FU1, the MAC address associated with the mgmt port should
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* be the base address (as read from the IVM) + 4, and for FU2 it
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* is + 10
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*/
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#define MAC_ADDRESS_OFFSET_FU1 4
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#define MAC_ADDRESS_OFFSET_FU2 10
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/*
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* This function reads the state of GPIO40 and returns true (non-zero)
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* if it is '1' and false(0) otherwise.
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*
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* This pin is routed to a pull-up on FU2 and a pull-down on
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*/
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#define GPIO_FU_DETECTION 40
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int secu1_is_fu2(void)
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{
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int value;
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int ret = gpio_request(GPIO_FU_DETECTION, "secu");
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if (ret) {
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printf("gpio: failed to request pin for FU detection\n");
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return 1;
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}
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gpio_direction_input(GPIO_FU_DETECTION);
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value = gpio_get_value(GPIO_FU_DETECTION);
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if (value == 1)
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printf("FU2 detected\n");
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else
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printf("FU1 detected\n");
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return value;
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}
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static uchar ivm_content[CONFIG_SYS_IVM_EEPROM_MAX_LEN];
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#if defined(CONFIG_HUSH_INIT_VAR)
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int hush_init_var(void)
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{
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ivm_analyze_eeprom(ivm_content, CONFIG_SYS_IVM_EEPROM_MAX_LEN);
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return 0;
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}
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#endif
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int misc_init_r(void)
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{
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if (secu1_is_fu2())
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ivm_read_eeprom(ivm_content, CONFIG_SYS_IVM_EEPROM_MAX_LEN,
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MAC_ADDRESS_OFFSET_FU2);
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else
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ivm_read_eeprom(ivm_content, CONFIG_SYS_IVM_EEPROM_MAX_LEN,
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MAC_ADDRESS_OFFSET_FU1);
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return 0;
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}
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