diff options
Diffstat (limited to 'board/phytec/common/imx8m_som_detection.c')
| -rw-r--r-- | board/phytec/common/imx8m_som_detection.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/board/phytec/common/imx8m_som_detection.c b/board/phytec/common/imx8m_som_detection.c new file mode 100644 index 00000000000..c6c96ed19cb --- /dev/null +++ b/board/phytec/common/imx8m_som_detection.c @@ -0,0 +1,168 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2023 PHYTEC Messtechnik GmbH + * Author: Teresa Remmet <t.remmet@phytec.de> + */ + +#include <common.h> +#include <asm/arch/sys_proto.h> +#include <dm/device.h> +#include <dm/uclass.h> +#include <i2c.h> +#include <u-boot/crc.h> + +#include "imx8m_som_detection.h" + +extern struct phytec_eeprom_data eeprom_data; + +/* Check if the SoM is actually one of the following products: + * - i.MX8MM + * - i.MX8MN + * - i.MX8MP + * - i.MX8MQ + * + * Returns 0 in case it's a known SoM. Otherwise, returns -1. + */ +u8 __maybe_unused phytec_imx8m_detect(struct phytec_eeprom_data *data) +{ + char *opt; + u8 som; + + /* We can not do the check for early API revisions */ + if (data->api_rev < PHYTEC_API_REV2) + return -1; + + if (!data) + data = &eeprom_data; + + som = data->data.data_api2.som_no; + debug("%s: som id: %u\n", __func__, som); + + opt = phytec_get_opt(data); + if (!opt) + return -1; + + if (som == PHYTEC_IMX8MP_SOM && is_imx8mp()) + return 0; + + if (som == PHYTEC_IMX8MM_SOM) { + if ((PHYTEC_GET_OPTION(opt[0]) != 0) && + (PHYTEC_GET_OPTION(opt[1]) == 0) && is_imx8mm()) + return 0; + else if ((PHYTEC_GET_OPTION(opt[0]) == 0) && + (PHYTEC_GET_OPTION(opt[1]) != 0) && is_imx8mn()) + return 0; + } + + if (som == PHYTEC_IMX8MQ_SOM && is_imx8mq()) + return 0; + + pr_err("%s: SoM ID does not match. Wrong EEPROM data?\n", __func__); + return -1; +} + +/* + * All PHYTEC i.MX8M boards have RAM size definition at the + * same location. + */ +u8 __maybe_unused phytec_get_imx8m_ddr_size(struct phytec_eeprom_data *data) +{ + char *opt; + u8 ddr_id; + + if (!data) + data = &eeprom_data; + + opt = phytec_get_opt(data); + if (opt) + ddr_id = PHYTEC_GET_OPTION(opt[2]); + else + ddr_id = PHYTEC_EEPROM_INVAL; + + debug("%s: ddr id: %u\n", __func__, ddr_id); + return ddr_id; +} + +/* + * Filter SPI-NOR flash information. All i.MX8M boards have this at + * the same location. + * returns: 0x0 if no SPI is populated. Otherwise a board depended + * code for the size. PHYTEC_EEPROM_INVAL when the data is invalid. + */ +u8 __maybe_unused phytec_get_imx8m_spi(struct phytec_eeprom_data *data) +{ + char *opt; + u8 spi; + + if (!data) + data = &eeprom_data; + + if (data->api_rev < PHYTEC_API_REV2) + return PHYTEC_EEPROM_INVAL; + + opt = phytec_get_opt(data); + if (opt) + spi = PHYTEC_GET_OPTION(opt[4]); + else + spi = PHYTEC_EEPROM_INVAL; + + debug("%s: spi: %u\n", __func__, spi); + return spi; +} + +/* + * Filter ethernet phy information. All i.MX8M boards have this at + * the same location. + * returns: 0x0 if no ethernet phy is populated. 0x1 if it is populated. + * PHYTEC_EEPROM_INVAL when the data is invalid. + */ +u8 __maybe_unused phytec_get_imx8m_eth(struct phytec_eeprom_data *data) +{ + char *opt; + u8 eth; + + if (!data) + data = &eeprom_data; + + if (data->api_rev < PHYTEC_API_REV2) + return PHYTEC_EEPROM_INVAL; + + opt = phytec_get_opt(data); + if (opt) { + eth = PHYTEC_GET_OPTION(opt[5]); + eth &= 0x1; + } else { + eth = PHYTEC_EEPROM_INVAL; + } + + debug("%s: eth: %u\n", __func__, eth); + return eth; +} + +/* + * Filter RTC information for phyCORE-i.MX8MP. + * returns: 0 if no RTC is populated. 1 if it is populated. + * PHYTEC_EEPROM_INVAL when the data is invalid. + */ +u8 __maybe_unused phytec_get_imx8mp_rtc(struct phytec_eeprom_data *data) +{ + char *opt; + u8 rtc; + + if (!data) + data = &eeprom_data; + + if (data->api_rev < PHYTEC_API_REV2) + return PHYTEC_EEPROM_INVAL; + + opt = phytec_get_opt(data); + if (opt) { + rtc = PHYTEC_GET_OPTION(opt[5]); + rtc &= 0x4; + rtc = !(rtc >> 2); + } else { + rtc = PHYTEC_EEPROM_INVAL; + } + debug("%s: rtc: %u\n", __func__, rtc); + return rtc; +} |