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The phyCORE-i.MX 93 is available in various variants. Relevant variant options for the spl/u-boot are: - with or without HS400 support for the eMMC - with 1GB ram chip, or 2GB ram chip The phyCORE's eeprom contains all information about the existing variant options. Add evaluation of the eeprom data to the spl/u-boot to enable/disable HS400 and to select the appropriate ram configuration at startup. Signed-off-by: Christoph Stoidner <c.stoidner@phytec.de> Reviewed-by: Wadim Egorov <w.egorov@phytec.de> Reviewed-by: Yannic Moog <y.moog@phytec.de> Tested-by: Primoz Fiser <primoz.fiser@norik.com>
112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2024 PHYTEC Messtechnik GmbH
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* Author: Primoz Fiser <primoz.fiser@norik.com>
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*/
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#include <asm/arch/sys_proto.h>
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#include <dm/device.h>
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#include <dm/uclass.h>
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#include <i2c.h>
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#include <u-boot/crc.h>
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#include "imx93_som_detection.h"
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extern struct phytec_eeprom_data eeprom_data;
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#if IS_ENABLED(CONFIG_PHYTEC_IMX93_SOM_DETECTION)
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/* Check if the SoM is actually one of the following products:
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* - i.MX93
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*
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* Returns 0 in case it's a known SoM. Otherwise, returns 1.
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*/
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u8 __maybe_unused phytec_imx93_detect(struct phytec_eeprom_data *data)
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{
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u8 som;
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if (!data)
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data = &eeprom_data;
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/* Early API revisions are not supported */
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if (!data->valid || data->payload.api_rev < PHYTEC_API_REV2)
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return 1;
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som = data->payload.data.data_api2.som_no;
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debug("%s: som id: %u\n", __func__, som);
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if (som == PHYTEC_IMX93_SOM && is_imx93())
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return 0;
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pr_err("%s: SoM ID does not match. Wrong EEPROM data?\n", __func__);
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return 1;
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}
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/*
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* Filter PHYTEC i.MX93 SoM options by option index
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*
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* Returns:
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* - option value
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* - PHYTEC_EEPROM_INVAL when the data is invalid
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*
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*/
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u8 __maybe_unused phytec_imx93_get_opt(struct phytec_eeprom_data *data,
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enum phytec_imx93_option_index idx)
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{
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char *opt;
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u8 opt_id;
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if (!data)
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data = &eeprom_data;
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if (!data->valid || data->payload.api_rev < PHYTEC_API_REV2)
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return PHYTEC_EEPROM_INVAL;
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opt = phytec_get_opt(data);
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if (opt)
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opt_id = PHYTEC_GET_OPTION(opt[idx]);
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else
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opt_id = PHYTEC_EEPROM_INVAL;
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debug("%s: opt[%d] id: %u\n", __func__, idx, opt_id);
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return opt_id;
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}
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/*
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* Filter PHYTEC i.MX93 SoM voltage
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*
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* Returns:
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* - PHYTEC_IMX93_VOLTAGE_1V8 or PHYTEC_IMX93_VOLTAGE_3V3
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* - PHYTEC_EEPROM_INVAL when the data is invalid
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*
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*/
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enum phytec_imx93_voltage __maybe_unused phytec_imx93_get_voltage(struct phytec_eeprom_data *data)
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{
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u8 option = phytec_imx93_get_opt(data, PHYTEC_IMX93_OPT_FEAT);
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if (option == PHYTEC_EEPROM_INVAL)
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return PHYTEC_IMX93_VOLTAGE_INVALID;
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return (option & 0x01) ? PHYTEC_IMX93_VOLTAGE_1V8 : PHYTEC_IMX93_VOLTAGE_3V3;
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}
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#else
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inline u8 __maybe_unused phytec_imx93_detect(struct phytec_eeprom_data *data)
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{
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return 1;
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}
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inline u8 __maybe_unused phytec_imx93_get_opt(struct phytec_eeprom_data *data,
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enum phytec_imx93_option_index idx)
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{
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return PHYTEC_EEPROM_INVAL;
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}
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inline enum phytec_imx93_voltage __maybe_unused phytec_imx93_get_voltage
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(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_IMX93_SOM_DETECTION) */
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