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44c82e7c90
Add helper function to read out the PCB revision of a PHYTEC SoM. Signed-off-by: Teresa Remmet <t.remmet@phytec.de> Reviewed-by: Yannic Moog <y.moog@phytec.de> Tested-by: Yannic Moog <y.moog@phytec.de>
110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2023 PHYTEC Messtechnik GmbH
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* Author: Teresa Remmet <t.remmet@phytec.de>
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*/
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#ifndef _PHYTEC_SOM_DETECTION_H
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#define _PHYTEC_SOM_DETECTION_H
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#define PHYTEC_MAX_OPTIONS 17
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#define PHYTEC_EEPROM_INVAL 0xff
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#define PHYTEC_GET_OPTION(option) \
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(((option) > '9') ? (option) - 'A' + 10 : (option) - '0')
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enum {
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PHYTEC_API_REV0 = 0,
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PHYTEC_API_REV1,
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PHYTEC_API_REV2,
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};
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static const char * const phytec_som_type_str[] = {
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"PCM",
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"PCL",
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"KSM",
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"KSP",
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};
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struct phytec_api0_data {
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u8 pcb_rev; /* PCB revision of SoM */
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u8 som_type; /* SoM type */
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u8 ksp_no; /* KSP no */
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char opt[16]; /* SoM options */
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u8 mac[6]; /* MAC address (optional) */
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u8 pad[5]; /* padding */
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u8 cksum; /* checksum */
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} __packed;
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struct phytec_api2_data {
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u8 pcb_rev; /* PCB revision of SoM */
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u8 pcb_sub_opt_rev; /* PCB subrevision and opt revision */
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u8 som_type; /* SoM type */
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u8 som_no; /* SoM number */
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u8 ksp_no; /* KSP information */
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char opt[PHYTEC_MAX_OPTIONS]; /* SoM options */
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char bom_rev[2]; /* BOM revision */
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u8 mac[6]; /* MAC address (optional) */
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u8 crc8; /* checksum */
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} __packed;
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struct phytec_eeprom_data {
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u8 api_rev;
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union {
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struct phytec_api0_data data_api0;
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struct phytec_api2_data data_api2;
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} data;
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} __packed;
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#if IS_ENABLED(CONFIG_PHYTEC_SOM_DETECTION)
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int phytec_eeprom_data_setup_fallback(struct phytec_eeprom_data *data,
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int bus_num, int addr,
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int addr_fallback);
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int phytec_eeprom_data_setup(struct phytec_eeprom_data *data,
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int bus_num, int addr);
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int phytec_eeprom_data_init(struct phytec_eeprom_data *data,
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int bus_num, int addr);
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void __maybe_unused phytec_print_som_info(struct phytec_eeprom_data *data);
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char * __maybe_unused phytec_get_opt(struct phytec_eeprom_data *data);
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u8 __maybe_unused phytec_get_rev(struct phytec_eeprom_data *data);
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#else
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inline int phytec_eeprom_data_setup(struct phytec_eeprom_data *data,
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int bus_num, int addr)
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{
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return PHYTEC_EEPROM_INVAL;
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}
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inline int phytec_eeprom_data_setup_fallback(struct phytec_eeprom_data *data,
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int bus_num, int addr,
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int addr_fallback)
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{
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return PHYTEC_EEPROM_INVAL;
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}
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inline int phytec_eeprom_data_init(struct phytec_eeprom_data *data,
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int bus_num, int addr)
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{
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return PHYTEC_EEPROM_INVAL;
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}
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inline void __maybe_unused phytec_print_som_info(struct phytec_eeprom_data *data)
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{
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}
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inline char *__maybe_unused phytec_get_opt(struct phytec_eeprom_data *data)
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{
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return NULL;
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}
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u8 __maybe_unused phytec_get_rev(struct phytec_eeprom_data *data)
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{
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return PHYTEC_EEPROM_INVAL;
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}
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#endif /* IS_ENABLED(CONFIG_PHYTEC_SOM_DETECTION) */
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#endif /* _PHYTEC_SOM_DETECTION_H */
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