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a9719ef045
Add imx8m specific detection part. Which includes checking the EEPROM data for article number options. 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>
169 lines
3.5 KiB
C
169 lines
3.5 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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#include <common.h>
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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 "imx8m_som_detection.h"
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extern struct phytec_eeprom_data eeprom_data;
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/* Check if the SoM is actually one of the following products:
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* - i.MX8MM
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* - i.MX8MN
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* - i.MX8MP
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* - i.MX8MQ
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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_imx8m_detect(struct phytec_eeprom_data *data)
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{
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char *opt;
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u8 som;
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/* We can not do the check for early API revisions */
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if (data->api_rev < PHYTEC_API_REV2)
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return -1;
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if (!data)
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data = &eeprom_data;
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som = data->data.data_api2.som_no;
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debug("%s: som id: %u\n", __func__, som);
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opt = phytec_get_opt(data);
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if (!opt)
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return -1;
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if (som == PHYTEC_IMX8MP_SOM && is_imx8mp())
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return 0;
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if (som == PHYTEC_IMX8MM_SOM) {
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if ((PHYTEC_GET_OPTION(opt[0]) != 0) &&
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(PHYTEC_GET_OPTION(opt[1]) == 0) && is_imx8mm())
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return 0;
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else if ((PHYTEC_GET_OPTION(opt[0]) == 0) &&
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(PHYTEC_GET_OPTION(opt[1]) != 0) && is_imx8mn())
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return 0;
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}
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if (som == PHYTEC_IMX8MQ_SOM && is_imx8mq())
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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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* All PHYTEC i.MX8M boards have RAM size definition at the
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* same location.
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*/
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u8 __maybe_unused phytec_get_imx8m_ddr_size(struct phytec_eeprom_data *data)
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{
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char *opt;
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u8 ddr_id;
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if (!data)
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data = &eeprom_data;
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opt = phytec_get_opt(data);
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if (opt)
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ddr_id = PHYTEC_GET_OPTION(opt[2]);
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else
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ddr_id = PHYTEC_EEPROM_INVAL;
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debug("%s: ddr id: %u\n", __func__, ddr_id);
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return ddr_id;
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}
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/*
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* Filter SPI-NOR flash information. All i.MX8M boards have this at
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* the same location.
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* returns: 0x0 if no SPI is populated. Otherwise a board depended
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* code for the size. PHYTEC_EEPROM_INVAL when the data is invalid.
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*/
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u8 __maybe_unused phytec_get_imx8m_spi(struct phytec_eeprom_data *data)
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{
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char *opt;
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u8 spi;
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if (!data)
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data = &eeprom_data;
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if (data->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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spi = PHYTEC_GET_OPTION(opt[4]);
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else
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spi = PHYTEC_EEPROM_INVAL;
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debug("%s: spi: %u\n", __func__, spi);
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return spi;
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}
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/*
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* Filter ethernet phy information. All i.MX8M boards have this at
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* the same location.
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* returns: 0x0 if no ethernet phy is populated. 0x1 if it is populated.
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* PHYTEC_EEPROM_INVAL when the data is invalid.
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*/
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u8 __maybe_unused phytec_get_imx8m_eth(struct phytec_eeprom_data *data)
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{
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char *opt;
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u8 eth;
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if (!data)
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data = &eeprom_data;
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if (data->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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eth = PHYTEC_GET_OPTION(opt[5]);
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eth &= 0x1;
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} else {
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eth = PHYTEC_EEPROM_INVAL;
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}
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debug("%s: eth: %u\n", __func__, eth);
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return eth;
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}
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/*
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* Filter RTC information for phyCORE-i.MX8MP.
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* returns: 0 if no RTC is populated. 1 if it is populated.
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* PHYTEC_EEPROM_INVAL when the data is invalid.
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*/
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u8 __maybe_unused phytec_get_imx8mp_rtc(struct phytec_eeprom_data *data)
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{
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char *opt;
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u8 rtc;
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if (!data)
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data = &eeprom_data;
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if (data->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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rtc = PHYTEC_GET_OPTION(opt[5]);
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rtc &= 0x4;
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rtc = !(rtc >> 2);
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} else {
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rtc = PHYTEC_EEPROM_INVAL;
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}
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debug("%s: rtc: %u\n", __func__, rtc);
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return rtc;
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}
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