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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2023 PHYTEC Messtechnik GmbH
* Author: Teresa Remmet <t.remmet@phytec.de>
*/
#ifndef _PHYTEC_SOM_DETECTION_H
#define _PHYTEC_SOM_DETECTION_H
#define PHYTEC_MAX_OPTIONS 17
#define PHYTEC_EEPROM_INVAL 0xff
#define PHYTEC_GET_OPTION(option) \
(((option) > '9') ? (option) - 'A' + 10 : (option) - '0')
enum {
PHYTEC_API_REV0 = 0,
PHYTEC_API_REV1,
PHYTEC_API_REV2,
};
static const char * const phytec_som_type_str[] = {
"PCM",
"PCL",
"KSM",
"KSP",
};
struct phytec_api0_data {
u8 pcb_rev; /* PCB revision of SoM */
u8 som_type; /* SoM type */
u8 ksp_no; /* KSP no */
char opt[16]; /* SoM options */
u8 mac[6]; /* MAC address (optional) */
u8 pad[5]; /* padding */
u8 cksum; /* checksum */
} __packed;
struct phytec_api2_data {
u8 pcb_rev; /* PCB revision of SoM */
u8 pcb_sub_opt_rev; /* PCB subrevision and opt revision */
u8 som_type; /* SoM type */
u8 som_no; /* SoM number */
u8 ksp_no; /* KSP information */
char opt[PHYTEC_MAX_OPTIONS]; /* SoM options */
char bom_rev[2]; /* BOM revision */
u8 mac[6]; /* MAC address (optional) */
u8 crc8; /* checksum */
} __packed;
struct phytec_eeprom_data {
u8 api_rev;
union {
struct phytec_api0_data data_api0;
struct phytec_api2_data data_api2;
} data;
} __packed;
#if IS_ENABLED(CONFIG_PHYTEC_SOM_DETECTION)
int phytec_eeprom_data_setup_fallback(struct phytec_eeprom_data *data,
int bus_num, int addr,
int addr_fallback);
int phytec_eeprom_data_setup(struct phytec_eeprom_data *data,
int bus_num, int addr);
int phytec_eeprom_data_init(struct phytec_eeprom_data *data,
int bus_num, int addr);
void __maybe_unused phytec_print_som_info(struct phytec_eeprom_data *data);
char * __maybe_unused phytec_get_opt(struct phytec_eeprom_data *data);
u8 __maybe_unused phytec_get_rev(struct phytec_eeprom_data *data);
#else
inline int phytec_eeprom_data_setup(struct phytec_eeprom_data *data,
int bus_num, int addr)
{
return PHYTEC_EEPROM_INVAL;
}
inline int phytec_eeprom_data_setup_fallback(struct phytec_eeprom_data *data,
int bus_num, int addr,
int addr_fallback)
{
return PHYTEC_EEPROM_INVAL;
}
inline int phytec_eeprom_data_init(struct phytec_eeprom_data *data,
int bus_num, int addr)
{
return PHYTEC_EEPROM_INVAL;
}
inline void __maybe_unused phytec_print_som_info(struct phytec_eeprom_data *data)
{
}
inline char *__maybe_unused phytec_get_opt(struct phytec_eeprom_data *data)
{
return NULL;
}
u8 __maybe_unused phytec_get_rev(struct phytec_eeprom_data *data)
{
return PHYTEC_EEPROM_INVAL;
}
#endif /* IS_ENABLED(CONFIG_PHYTEC_SOM_DETECTION) */
#endif /* _PHYTEC_SOM_DETECTION_H */
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