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ARM: legoev3: set serial# env var

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This sets the serial# environmet variable instead of using ATAGs on
LEGO MINDSTORMS EV3.

Also fix some nomenclature while we are touching this code (Bluetooth
address is not the same as MAC address, EEPROM version is not the same
as board version).

Signed-off-by: David Lechner <david@lechnology.com>
This commit is contained in:
David Lechner 2021-01-11 13:24:44 -06:00 committed by Lokesh Vutla
parent 64fd2d2614
commit 68432b5d12
3 changed files with 40 additions and 48 deletions
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85
board/lego/ev3/legoev3.c
View file

@ -13,6 +13,7 @@
*/
#include <common.h>
#include <env.h>
#include <i2c.h>
#include <init.h>
#include <spi.h>
@ -28,11 +29,9 @@
DECLARE_GLOBAL_DATA_PTR;
u8 board_rev;
#define EEPROM_I2C_ADDR 0x50
#define EEPROM_REV_OFFSET 0x3F00
#define EEPROM_MAC_OFFSET 0x3F06
#define EEPROM_BDADDR_OFFSET 0x3F06
const struct pinmux_resource pinmuxes[] = {
PINMUX_ITEM(spi0_pins_base),
@ -52,59 +51,46 @@ const struct lpsc_resource lpsc[] = {
const int lpsc_size = ARRAY_SIZE(lpsc);
u32 get_board_rev(void)
{
u8 buf[2];
if (!board_rev) {
if (i2c_read(EEPROM_I2C_ADDR, EEPROM_REV_OFFSET, 2, buf, 2)) {
printf("\nBoard revision read failed!\n");
} else {
/*
* Board rev 3 has MAC address at EEPROM_REV_OFFSET.
* The Bluetooth address serves as the board serial number.
*/
static void setup_serial_number(void)
{
u32 offset;
char serial_number[13];
u8 buf[6];
u8 eeprom_rev;
if (env_get("serial#"))
return;
if (i2c_read(EEPROM_I2C_ADDR, EEPROM_REV_OFFSET, 2, buf, 2)) {
printf("\nEEPROM revision read failed!\n");
return;
}
/*
* EEPROM rev 3 has Bluetooth address at EEPROM_REV_OFFSET.
* Other revisions have checksum at EEPROM_REV_OFFSET+1
* to detect this.
*/
if ((buf[0] ^ buf[1]) == 0xFF)
board_rev = buf[0];
eeprom_rev = buf[0];
else
board_rev = 3;
}
}
eeprom_rev = 3;
return board_rev;
}
/*
* The Bluetooth MAC address serves as the board serial number.
*/
void get_board_serial(struct tag_serialnr *serialnr)
{
u32 offset;
u8 buf[6];
if (!board_rev)
board_rev = get_board_rev();
/* Board rev 3 has MAC address where rev should be */
offset = (board_rev == 3) ? EEPROM_REV_OFFSET : EEPROM_MAC_OFFSET;
/* EEPROM rev 3 has Bluetooth address where rev should be */
offset = (eeprom_rev == 3) ? EEPROM_REV_OFFSET : EEPROM_BDADDR_OFFSET;
if (i2c_read(EEPROM_I2C_ADDR, offset, 2, buf, 6)) {
printf("\nBoard serial read failed!\n");
} else {
u8 *nr;
nr = (u8 *)&serialnr->low;
nr[0] = buf[5];
nr[1] = buf[4];
nr[2] = buf[3];
nr[3] = buf[2];
nr = (u8 *)&serialnr->high;
nr[0] = buf[1];
nr[1] = buf[0];
nr[2] = 0;
nr[3] = 0;
printf("\nEEPROM serial read failed!\n");
return;
}
sprintf(serial_number, "%02X%02X%02X%02X%02X%02X",
buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
env_set("serial#", serial_number);
}
int board_early_init_f(void)
@ -150,3 +136,10 @@ int board_init(void)
return 0;
}
int board_late_init(void)
{
setup_serial_number();
return 0;
}

1
configs/legoev3_defconfig
View file

@ -12,6 +12,7 @@ CONFIG_AUTOBOOT_STOP_STR="l"
# CONFIG_DISPLAY_CPUINFO is not set
# CONFIG_DISPLAY_BOARDINFO is not set
CONFIG_BOARD_EARLY_INIT_F=y
CONFIG_BOARD_LATE_INIT=y
CONFIG_HUSH_PARSER=y
CONFIG_CMD_ASKENV=y
CONFIG_CRC32_VERIFY=y

2
include/configs/legoev3.h
View file

@ -65,8 +65,6 @@
#define LINUX_BOOT_PARAM_ADDR (PHYS_SDRAM_1 + 0x100)
#define CONFIG_HWCONFIG /* enable hwconfig */
#define CONFIG_CMDLINE_TAG
#define CONFIG_REVISION_TAG
#define CONFIG_SERIAL_TAG
#define CONFIG_SETUP_MEMORY_TAGS
#define CONFIG_SETUP_INITRD_TAG
#define CONFIG_BOOTCOMMAND \