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This includes a rev_compat field, which we can use to identify the last hardware revision this hardware is compatible with. Example: Say the current hardware revision is 7, but it is compatible with version 5, then we store 7 as the current rev, and 5 as the rev_compat. Software can now check the rev_compat rather than the current rev for compatibility. This makes MPM more future-proof against minor, compatible hardware changes.
93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
//
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// Copyright 2017 Ettus Research, a National Instruments Company
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//
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// SPDX-License-Identifier: GPL-3.0-or-later
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//
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#ifndef EEPROM_H
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#define EEPROM_H
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#include <arpa/inet.h>
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typedef uint32_t u32;
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typedef uint16_t u16;
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typedef uint8_t u8;
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#define ETH_ALEN 6
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/* TODO: Come up with a smarter way to do this when we start using this on
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* another device */
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#define NVMEM_PATH_SLOT_A "/sys/bus/nvmem/devices/9-00500/nvmem"
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#define NVMEM_PATH_SLOT_B "/sys/bus/nvmem/devices/10-00500/nvmem"
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#define NVMEM_PATH_MB "/sys/bus/nvmem/devices/2-00500/nvmem"
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struct usrp_sulfur_eeprom {
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u32 magic;
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u32 version;
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u32 mcu_flags[4];
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u16 pid;
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u16 rev;
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u8 serial[8];
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u8 eth_addr0[ETH_ALEN];
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u16 dt_compat;
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u8 eth_addr1[ETH_ALEN];
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u16 mcu_compat;
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u8 eth_addr2[ETH_ALEN];
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u16 rev_compat;
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u32 crc;
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} __attribute__((packed));
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struct db_rev {
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u8 rev;
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u8 dt_compat;
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} __attribute__((packed));
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struct usrp_sulfur_db_eeprom {
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u32 magic;
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u32 version;
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u16 pid;
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union rev {
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u16 v1_rev;
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struct db_rev v2_rev;
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} rev;
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char serial[8];
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u32 crc;
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} __attribute__((packed));
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/* Motherboard EEPROM stuff */
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struct usrp_sulfur_eeprom *usrp_sulfur_eeprom_new(const u32 *mcu_flags,
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const u16 pid,
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const u16 rev,
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const char *serial,
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const char *eth_addr0,
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const char *eth_addr1,
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const char *eth_addr2,
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const u16 dt_compat,
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const u16 mcu_compat,
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const u16 rev_compat);
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void usrp_sulfur_eeprom_to_i2c(struct usrp_sulfur_eeprom *ep, const char *path);
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void usrp_sulfur_eeprom_to_file(struct usrp_sulfur_eeprom *ep,
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const char *path);
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void usrp_sulfur_eeprom_recrc(struct usrp_sulfur_eeprom *ep);
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struct usrp_sulfur_eeprom *usrp_sulfur_eeprom_from_file(const char *path);
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void usrp_sulfur_eeprom_print(const struct usrp_sulfur_eeprom *ep);
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/* Daughterboard EEPROM stuff */
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struct usrp_sulfur_db_eeprom *usrp_sulfur_db_eeprom_new(const u16 pid,
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const u16 rev,
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const char *serial,
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const u16 dt_compat);
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void usrp_sulfur_db_eeprom_to_file(struct usrp_sulfur_db_eeprom *ep,
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const char *path);
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struct usrp_sulfur_db_eeprom *usrp_sulfur_db_eeprom_from_file(const char *path);
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void usrp_sulfur_db_eeprom_print(const struct usrp_sulfur_db_eeprom *ep);
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#endif /* EEPROM_H */
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