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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2024 PHYTEC Messtechnik GmbH
* Author: Primoz Fiser <primoz.fiser@norik.com>
*/
#include <asm/arch/sys_proto.h>
#include <dm/device.h>
#include <dm/uclass.h>
#include <i2c.h>
#include <u-boot/crc.h>
#include "imx93_som_detection.h"
extern struct phytec_eeprom_data eeprom_data;
#if IS_ENABLED(CONFIG_PHYTEC_IMX93_SOM_DETECTION)
/* Check if the SoM is actually one of the following products:
* - i.MX93
*
* Returns 0 in case it's a known SoM. Otherwise, returns 1.
*/
u8 __maybe_unused phytec_imx93_detect(struct phytec_eeprom_data *data)
{
u8 som;
if (!data)
data = &eeprom_data;
/* Early API revisions are not supported */
if (!data->valid || data->payload.api_rev < PHYTEC_API_REV2)
return 1;
som = data->payload.data.data_api2.som_no;
debug("%s: som id: %u\n", __func__, som);
if (som == PHYTEC_IMX93_SOM && is_imx93())
return 0;
pr_err("%s: SoM ID does not match. Wrong EEPROM data?\n", __func__);
return 1;
}
/*
* Filter PHYTEC i.MX93 SoM options by option index
*
* Returns:
* - option value
* - PHYTEC_EEPROM_INVAL when the data is invalid
*
*/
u8 __maybe_unused phytec_imx93_get_opt(struct phytec_eeprom_data *data,
enum phytec_imx93_option_index idx)
{
char *opt;
u8 opt_id;
if (!data)
data = &eeprom_data;
if (!data->valid || data->payload.api_rev < PHYTEC_API_REV2)
return PHYTEC_EEPROM_INVAL;
opt = phytec_get_opt(data);
if (opt)
opt_id = PHYTEC_GET_OPTION(opt[idx]);
else
opt_id = PHYTEC_EEPROM_INVAL;
debug("%s: opt[%d] id: %u\n", __func__, idx, opt_id);
return opt_id;
}
/*
* Filter PHYTEC i.MX93 SoM voltage
*
* Returns:
* - PHYTEC_IMX93_VOLTAGE_1V8 or PHYTEC_IMX93_VOLTAGE_3V3
* - PHYTEC_EEPROM_INVAL when the data is invalid
*
*/
enum phytec_imx93_voltage __maybe_unused phytec_imx93_get_voltage(struct phytec_eeprom_data *data)
{
u8 option = phytec_imx93_get_opt(data, PHYTEC_IMX93_OPT_FEAT);
if (option == PHYTEC_EEPROM_INVAL)
return PHYTEC_IMX93_VOLTAGE_INVALID;
return (option & 0x01) ? PHYTEC_IMX93_VOLTAGE_1V8 : PHYTEC_IMX93_VOLTAGE_3V3;
}
#else
inline u8 __maybe_unused phytec_imx93_detect(struct phytec_eeprom_data *data)
{
return 1;
}
inline u8 __maybe_unused phytec_imx93_get_opt(struct phytec_eeprom_data *data,
enum phytec_imx93_option_index idx)
{
return PHYTEC_EEPROM_INVAL;
}
inline enum phytec_imx93_voltage __maybe_unused phytec_imx93_get_voltage
(struct phytec_eeprom_data *data)
{
return PHYTEC_EEPROM_INVAL;
}
#endif /* IS_ENABLED(CONFIG_PHYTEC_IMX93_SOM_DETECTION) */
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