I2C EEPROM data contains the board name and its revision. Add support for: - Reading EEPROM data and store a copy at end of SRAM - Updating env variable with relevant board info - Printing board info during boot.
Signed-off-by: Lokesh Vutla lokeshvutla@ti.com --- arch/arm/mach-k3/include/mach/am64_hardware.h | 3 + board/ti/am64x/evm.c | 92 +++++++++++++++++++ 2 files changed, 95 insertions(+)
diff --git a/arch/arm/mach-k3/include/mach/am64_hardware.h b/arch/arm/mach-k3/include/mach/am64_hardware.h index 8dc318bfbf..c368aa7e6b 100644 --- a/arch/arm/mach-k3/include/mach/am64_hardware.h +++ b/arch/arm/mach-k3/include/mach/am64_hardware.h @@ -49,4 +49,7 @@
#define ROM_ENTENDED_BOOT_DATA_INFO 0x701beb00
+/* Use Last 1K as Scratch pad */ +#define TI_SRAM_SCRATCH_BOARD_EEPROM_START 0x701bfc00 + #endif /* __ASM_ARCH_DRA8_HARDWARE_H */ diff --git a/board/ti/am64x/evm.c b/board/ti/am64x/evm.c index bbb81dddb3..18e49112ac 100644 --- a/board/ti/am64x/evm.c +++ b/board/ti/am64x/evm.c @@ -10,6 +10,14 @@ #include <common.h> #include <asm/io.h> #include <spl.h> +#include <asm/arch/hardware.h> +#include <asm/arch/sys_proto.h> +#include <env.h> + +#include "../common/board_detect.h" + +#define board_is_am64x_gpevm() board_ti_k3_is("AM64-GPEVM") +#define board_is_am64x_skevm() board_ti_k3_is("AM64-SKEVM")
DECLARE_GLOBAL_DATA_PTR;
@@ -46,3 +54,87 @@ int board_fit_config_name_match(const char *name) return -1; } #endif + +#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; +} + +#ifdef CONFIG_BOARD_LATE_INIT +static void setup_board_eeprom_env(void) +{ + char *name = "am64x_gpevm"; + + if (do_board_detect()) + goto invalid_eeprom; + + if (board_is_am64x_gpevm()) + name = "am64x_gpevm"; + else if (board_is_am64x_skevm()) + name = "am64x_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); +} +#endif +#endif + +#ifdef CONFIG_BOARD_LATE_INIT +int board_late_init(void) +{ + if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) { + setup_board_eeprom_env(); + setup_serial(); + } + + return 0; +} +#endif