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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef ATLAS_VPD_H
#define ATLAS_VPD_H
/*
* The Atlas COMe module stores some non-volatile vital product data in
* an EC-attached I2C EEPROM. The EC firmware reads the EEPROM contents
* and provides them to the host via EMI (Embedded Memory Interface) 0.
*/
#include <types.h>
#define VPD_MAGIC 0x56504453 /* 'VPDS' */
/*
* Increment this value whenever new fields are added to the structures.
* Furthermore, adapt the `get_emi_eeprom_vpd()` function accordingly to
* provide fallback values for newly-added fields.
*/
#define VPD_LATEST_REVISION 1
struct __packed emi_eeprom_vpd_header {
uint32_t magic;
uint8_t revision;
uint8_t _rfu[15]; /* Reserved for Future Use */
};
/* For backwards compatibility reasons, do NOT reuse enum values! */
enum atlas_profile {
ATLAS_PROF_UNPROGRAMMED = 0, /* EEPROM not initialised */
ATLAS_PROF_DEFAULT = 1,
ATLAS_PROF_REALTIME_PERFORMANCE = 2,
ATLAS_PROF_THEMIS_LED_CONFIG = 3,
};
#define ATLAS_SN_PN_LENGTH 20
#define EMI_EEPROM_LAYOUT_LENGTH ( \
sizeof(struct emi_eeprom_vpd_header) + \
ATLAS_SN_PN_LENGTH + \
ATLAS_SN_PN_LENGTH + \
sizeof(uint16_t) \
)
union emi_eeprom_vpd {
struct __packed {
struct emi_eeprom_vpd_header header;
char serial_number[ATLAS_SN_PN_LENGTH]; /* xx-xx-xxx-xxx */
char part_number[ATLAS_SN_PN_LENGTH]; /* xxx-xxxx-xxxx.Rxx */
uint16_t profile;
};
uint8_t raw[EMI_EEPROM_LAYOUT_LENGTH];
};
/* Always returns a non-NULL pointer to valid data */
const union emi_eeprom_vpd *get_emi_eeprom_vpd(void);
#endif /* ATLAS_VPD_H */
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