The EEPROM provides information about the size of the eMMC. Provide a new function get_mmc_size_from_eeprom() to read it.
Signed-off-by: Heinrich Schuchardt heinrich.schuchardt@canonical.com Reviewed-by: E. Shattow lucent@gmail.com --- v4: no change v3: no change v2: fix typos in get_mmc_size_from_eeprom() description --- arch/riscv/include/asm/arch-jh7110/eeprom.h | 7 +++++++ board/starfive/visionfive2/Kconfig | 9 +++++++++ .../visionfive2/visionfive2-i2c-eeprom.c | 18 ++++++++++++++++++ 3 files changed, 34 insertions(+)
diff --git a/arch/riscv/include/asm/arch-jh7110/eeprom.h b/arch/riscv/include/asm/arch-jh7110/eeprom.h index 62d184aeb57..45ad2a5f7bc 100644 --- a/arch/riscv/include/asm/arch-jh7110/eeprom.h +++ b/arch/riscv/include/asm/arch-jh7110/eeprom.h @@ -12,6 +12,13 @@ u8 get_pcb_revision_from_eeprom(void); u32 get_ddr_size_from_eeprom(void);
+/** + * get_mmc_size_from_eeprom() - read eMMC size from EEPROM + * + * @return: size in GiB or 0 on error. + */ +u32 get_mmc_size_from_eeprom(void); + /** * get_product_id_from_eeprom - get product ID string * diff --git a/board/starfive/visionfive2/Kconfig b/board/starfive/visionfive2/Kconfig index 2186a939646..d7e8a7a7d78 100644 --- a/board/starfive/visionfive2/Kconfig +++ b/board/starfive/visionfive2/Kconfig @@ -50,4 +50,13 @@ config BOARD_SPECIFIC_OPTIONS # dummy imply PHY_LIB imply PHY_MSCC
+config STARFIVE_NO_EMMC + bool "Report eMMC size as zero" + help + The serial number string in the EEPROM is meant to report the + size of onboard eMMC. Unfortunately some Milk-V Mars CM Lite + modules without eMMC show a non-zero size here. + + Set to 'Y' if you have a Mars CM Lite module. + endif diff --git a/board/starfive/visionfive2/visionfive2-i2c-eeprom.c b/board/starfive/visionfive2/visionfive2-i2c-eeprom.c index 5095a0e9fdb..9648a270494 100644 --- a/board/starfive/visionfive2/visionfive2-i2c-eeprom.c +++ b/board/starfive/visionfive2/visionfive2-i2c-eeprom.c @@ -548,6 +548,24 @@ u32 get_ddr_size_from_eeprom(void) return hextoul(&pbuf.eeprom.atom1.data.pstr[14], NULL); }
+u32 get_mmc_size_from_eeprom(void) +{ + u32 size; + + if (IS_ENABLED(CONFIG_STARFIVE_NO_EMMC)) + return 0; + + if (read_eeprom()) + return 0; + + size = dectoul(&pbuf.eeprom.atom1.data.pstr[19], NULL); + + if (pbuf.eeprom.atom1.data.pstr[21] == 'T') + size <<= 10; + + return size; +} + U_BOOT_LONGHELP(mac, "\n" " - display EEPROM content\n"