From ba520788a51d1101d66b4a8b23b0d379f688622d Mon Sep 17 00:00:00 2001 From: Siddharth Vadapalli Date: Tue, 21 Feb 2023 12:34:43 +0530 Subject: board: ti: am62ax: evm.c: Add EEPROM associated features Add functions to support features such as detecting the board from the EEPROM as well as fetching the MAC address from EEPROM. Signed-off-by: Siddharth Vadapalli --- board/ti/am62ax/evm.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) diff --git a/board/ti/am62ax/evm.c b/board/ti/am62ax/evm.c index f5c2f46884..a7c3d43e43 100644 --- a/board/ti/am62ax/evm.c +++ b/board/ti/am62ax/evm.c @@ -55,6 +55,94 @@ int board_fit_config_name_match(const char *name) #define CTRLMMR_USB1_PHY_CTRL 0x43004018 #define CORE_VOLTAGE 0x80000000 +#ifdef CONFIG_TI_I2C_BOARD_DETECT +int do_board_detect(void) +{ + int ret; + + ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS, + CONFIG_EEPROM_CHIP_ADDRESS); + if (ret) { + printf("EEPROM not available at 0x%02x, trying to read at 0x%02x\n", + CONFIG_EEPROM_CHIP_ADDRESS, CONFIG_EEPROM_CHIP_ADDRESS + 1); + ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS, + CONFIG_EEPROM_CHIP_ADDRESS + 1); + if (ret) + pr_err("Reading on-board EEPROM at 0x%02x failed %d\n", + CONFIG_EEPROM_CHIP_ADDRESS + 1, ret); + } + + return ret; +} + +int checkboard(void) +{ + struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA; + + if (!do_board_detect()) + printf("Board: %s rev %s\n", ep->name, ep->version); + + return 0; +} +#endif + +#ifdef CONFIG_BOARD_LATE_INIT +static void setup_board_eeprom_env(void) +{ + char *name = "am62ax_skevm"; + + if (do_board_detect()) + goto invalid_eeprom; + + if (board_is_am62ax_skevm()) + name = "am62ax_skevm"; + else + printf("Unidentified board claims %s in eeprom header\n", + board_ti_get_name()); + +invalid_eeprom: + set_board_info_env_am6(name); +} + +static void setup_serial(void) +{ + struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA; + unsigned long board_serial; + char *endp; + char serial_string[17] = { 0 }; + + if (env_get("serial#")) + return; + + board_serial = simple_strtoul(ep->serial, &endp, 16); + if (*endp != '\0') { + pr_err("Error: Can't set serial# to %s\n", ep->serial); + return; + } + + snprintf(serial_string, sizeof(serial_string), "%016lx", board_serial); + env_set("serial#", serial_string); +} + +int board_late_init(void) +{ + if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) { + struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA; + + setup_board_eeprom_env(); + setup_serial(); + /* + * The first MAC address for ethernet a.k.a. ethernet0 comes from + * efuse populated via the am654 gigabit eth switch subsystem driver. + * All the other ones are populated via EEPROM, hence continue with + * an index of 1. + */ + board_ti_am6_set_ethaddr(1, ep->mac_addr_cnt); + } + return 0; +} +#endif + #if defined(CONFIG_SPL_BOARD_INIT) void spl_board_init(void) { -- cgit v1.2.3