98bbb6e7ab
Turris Omnia uses first MAC address from OTP for second ethernet interface. Second MAC address for third interface and third MAC address for first interface. Other Turris routers do not have this rotate by one mapping. So add function parameter for specifying id of the first ethernet interface. Signed-off-by: Pali Rohár <pali@kernel.org> Reviewed-by: Marek Behún <marek.behun@nic.cz>
120 lines
2.3 KiB
C
120 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Marek Behun <marek.behun@nic.cz>
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* Copyright (C) 2016 Tomas Hlavacek <tomas.hlavacek@nic.cz>
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*/
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#include <env.h>
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#include <net.h>
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#include <dm/uclass.h>
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#include <atsha204a-i2c.h>
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#include "turris_atsha_otp.h"
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#define TURRIS_ATSHA_OTP_VERSION 0
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#define TURRIS_ATSHA_OTP_SERIAL 1
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#define TURRIS_ATSHA_OTP_MAC0 3
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#define TURRIS_ATSHA_OTP_MAC1 4
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static struct udevice *get_atsha204a_dev(void)
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{
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/* Cannot be static because BSS does not have to be ready at this early stage */
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struct udevice *dev;
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if (uclass_get_device_by_name(UCLASS_MISC, "atsha204a@64", &dev)) {
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puts("Cannot find ATSHA204A on I2C bus!\n");
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dev = NULL;
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}
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return dev;
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}
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static void increment_mac(u8 *mac)
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{
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int i;
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for (i = 5; i >= 3; i--) {
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mac[i] += 1;
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if (mac[i])
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break;
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}
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}
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static void set_mac_if_invalid(int i, u8 *mac)
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{
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u8 oldmac[6];
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if (is_valid_ethaddr(mac) &&
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!eth_env_get_enetaddr_by_index("eth", i, oldmac))
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eth_env_set_enetaddr_by_index("eth", i, mac);
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}
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int turris_atsha_otp_init_mac_addresses(int first_idx)
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{
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struct udevice *dev = get_atsha204a_dev();
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u8 mac0[4], mac1[4], mac[6];
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int ret;
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if (!dev)
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return -1;
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ret = atsha204a_wakeup(dev);
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if (ret)
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return ret;
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ret = atsha204a_read(dev, ATSHA204A_ZONE_OTP, false,
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TURRIS_ATSHA_OTP_MAC0, mac0);
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if (ret)
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return ret;
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ret = atsha204a_read(dev, ATSHA204A_ZONE_OTP, false,
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TURRIS_ATSHA_OTP_MAC1, mac1);
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if (ret)
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return ret;
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atsha204a_sleep(dev);
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mac[0] = mac0[1];
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mac[1] = mac0[2];
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mac[2] = mac0[3];
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mac[3] = mac1[1];
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mac[4] = mac1[2];
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mac[5] = mac1[3];
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set_mac_if_invalid((first_idx + 0) % 3, mac);
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increment_mac(mac);
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set_mac_if_invalid((first_idx + 1) % 3, mac);
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increment_mac(mac);
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set_mac_if_invalid((first_idx + 2) % 3, mac);
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return 0;
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}
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int turris_atsha_otp_get_serial_number(u32 *version_num, u32 *serial_num)
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{
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struct udevice *dev = get_atsha204a_dev();
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int ret;
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if (!dev)
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return -1;
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ret = atsha204a_wakeup(dev);
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if (ret)
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return ret;
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ret = atsha204a_read(dev, ATSHA204A_ZONE_OTP, false,
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TURRIS_ATSHA_OTP_VERSION,
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(u8 *)version_num);
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if (ret)
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return ret;
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ret = atsha204a_read(dev, ATSHA204A_ZONE_OTP, false,
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TURRIS_ATSHA_OTP_SERIAL,
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(u8 *)serial_num);
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if (ret)
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return ret;
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atsha204a_sleep(dev);
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return 0;
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}
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